Netwrok appsdevelopment midterm 1

Due to a lack of reliability controls within the infrastructure, responsiveness to consumer or customer requirements may be reduced to a point whereby a business' overall continuity is threatened. up-front investments and infrastructure ownership costs that are required to enable new or expanded business automation solutions may themselves be prohibitive enough for a business to settle for IT infrastructure of less-than-ideal quality, thereby decreasing its ability to meet real-world requirements. inhibit an organization from keeping up with market demands, competitive pressures, and its own strategic business goals. A cloud refers to a distinct IT environment that is designed for the purpose of remotely provisioning scalable and measured IT resources. Whereas the Internet provides open access to many Web-based IT resources, a cloud is typically privately owned and offers access to IT resources that is metered. An IT resource is a physical or virtual IT-related artifact that can be either software based, such as a virtual server or a custom software program, or hardware-based, such as a physical server or a network device "on-premise" is another way of stating "on the premises of a controlled IT environment that is not cloud-based." This term is used to qualify an IT resource as an alternative to "cloud-based." An IT resource that is on-premise cannot be cloud-based, and vice-versa. o An on-premise IT resource can access and interact with a cloud-based IT resource. o An on-premise IT resource can be moved to a cloud, thereby changing it to a cloud-based IT resource. o Redundant deployments of an IT resource can exist in both on-premise and cloud-based environments. Scaling represents the ability of the IT resource to handle increased or decreased usage demands. o Horizontal Scaling - scaling out and scaling in o Vertical Scaling - scaling up and scaling down The horizontal allocation of resources is referred to as scaling out and the horizontal releasing of resources is referred to as scaling in

ADVANTAGES OF IAAS Eliminates capital expense and reduces ongoing cost. IaaS sidesteps the upfront expense of setting up and managing an on-site datacenter, making it an economical option for start-ups and businesses testing new ideas. Improves business continuity and disaster recovery. Achieving high availability, business continuity, and disaster recovery is expensive, since it requires a significant amount of technology and staff. But with the right service level agreement (SLA) in place, IaaS can reduce this cost and access applications and data as usual during a disaster or outage. Innovate rapidly. As soon as you’ve decided to launch a new product or initiative, the necessary computing infrastructure can be ready in minutes or hours, rather than the days or weeks—and sometimes months—it could take to set up internally. Respond quicker to shifting business conditions. IaaS enables you to quickly scale up resources to accommodate spikes in demand for your application— during the holidays, for example—then scale resources back down again when activity decreases to save money. Focus on your core business. IaaS frees up your team to focus on your organization’s core business rather than on IT infrastructure. Increase stability, reliability, and supportability. With IaaS there’s no need to maintain and upgrade software and hardware or troubleshoot equipment problems. With the appropriate agreement in place, the service provider assures that your infrastructure is reliable and meets SLAs. Better security. With the appropriate service agreement, a cloud service provider can provide security for your applications and data that may be better than what you can attain in-house. Gets new apps to users faster. Because you don’t need to first set up the infrastructure before you can develop and deliver apps, you can get them to users faster with IaaS. PAAS - complete development and deployment environment in the cloud, with resources that enable you to deliver everything from simple cloud-based apps to sophisticated, cloud-enabled enterprise applications.

Use free client software. Users can run most SaaS apps directly from their web browser without needing to download and install any software, although some apps require plugins. This means that you don’t need to purchase and install special software for your users. Mobilize your workforce easily. SaaS makes it easy to “mobilize” your workforce because users can access SaaS apps and data from any Internet- connected computer or mobile device. You don’t need to worry about developing apps to run on different types of computers and devices because the service provider has already done so. In addition, you don’t need to bring special expertise onboard to manage the security issues inherent in mobile computing. A carefully chosen service provider will ensure the security of your data, regardless of the type of device consuming it. Access app data from anywhere. With data stored in the cloud, users can access their information from any Internet-connected computer or mobile device. And when app data is stored in the cloud, no data is lost if a user’s computer or device fails. GOALS AND BENEFITS OF CLOUD COMPUTING Reduced Investments and Proportional Costs proportional costs - A cloud's Measured Usage characteristic represents a feature-set that allows measured operational expenditures (directly related to business performance) to replace anticipated capital expenditures

Amazon EC2 is integrated with most AWS services such as Amazon Simple Storage Service (Amazon S3), Amazon Relational Database Service (Amazon RDS), and Amazon Virtual Private Cloud (Amazon VPC) RELIABLE Amazon EC2 offers a highly reliable environment where replacement instances can be rapidly and predictably commissioned. SECURE Cloud security at AWS is the highest priority. As an AWS customer, you will benefit from a data center and network architecture built to meet the requirements of the most security-sensitive organizations. INEXPENSIVE Amazon EC2 passes on to you the financial benefits of Amazon’s scale. EASY TO START AWS S3 - Amazon Simple Storage Service (Amazon S3) is storage for the Internet. You can use Amazon S3 to store and retrieve any amount of data at any time, from anywhere on the web.  Creating buckets – Create and name a bucket that stores data. Buckets are the fundamental container in Amazon S3 for data storage.  Storing data – Store an infinite amount of data in a bucket. Upload as many objects as you like into an Amazon S3 bucket. Each object can contain up to 5 TB of data. Each object is stored and retrieved using a unique developer-assigned key.  Downloading data – Download your data or enable others to do so. Download your data anytime you like, or allow others to do the same.  Permissions – Grant or deny access to others who want to upload or download data into your Amazon S3 bucket. Grant upload and download permissions to three types of users. Authentication mechanisms can help keep data secure from unauthorized access.  Standard interfaces – Use standards-based REST and SOAP interfaces designed to work with any internet-development toolkit.

Server side storage – database, files, etc. – very long term SP Implicit Objects are also called pre-defined variables . Request - javax.servlet.http.HttpServletRequest Each time a client requests a page the JSP engine creates a new object to represent that request. This is the HttpServletRequest object associated with the request. Response – The response object is an instance of a javax.servlet.http.HttpServletResponse object creates an object to represent the response to the client. This is the HttpServletResponse object associated with the response to the client. Out – The out implicit object is an instance of a javax.servlet.jsp.JspWriter Unlike the PrintWriter object, JspWriter throws IOExceptions . used to send content in a response. out.print(dataType dt) - Print a data type value out.println(dataType dt) - Print a data type value then terminate the line with new line character. out.flush() - Flush the stream. This is the PrintWriter object used to send output to the client. Session – The session object is an instance of javax.servlet.http.HttpSession and behaves exactly the same way that session objects behave under Java Servlets. The session object is used to track client session between client requests This is the HttpSession object associated with the request. Application – The application object is direct wrapper around the ServletContext object for the generated Servlet and in reality an instance of a javax.servlet.ServletContext object. This object is created when the JSP page is initialized and will be removed when the JSP page is removed by the jspDestroy() method. This is the ServletContext object associated with the application context. Config – The config object is an instantiation of javax.servlet.ServletConfig and is a direct wrapper around the ServletConfig object for the generated servlet. This object allows the JSP programmer access to the Servlet or JSP engine initialization parameters such as the paths or file locations etc. config.getServletName(); This is the ServletConfig object associated with the page.

and click on a link to Webpage 2, the URL of Webpage 1 is included in the Referer header when the browser requests Webpage 2. User-Agent This header identifies the browser or other client making the request and can be used to return different content to different types of browsers. The HttpServletRequest Object 1 Cookie[] getCookies() Returns an array containing all of the Cookie objects the client sent with this request. 2 Enumeration getAttributeNames() Returns an Enumeration containing the names of the attributes available to this request. 3 Enumeration getHeaderNames() Returns an enumeration of all the header names this request contains. 4 Enumeration getParameterNames() Returns an enumeration of String objects containing the names of the parameters contained in this request. 5 HttpSession getSession() Returns the current session associated with the this request, or if the request does not have a session, creates one. 6 HttpSession getSession(boolean create) Returns the current HttpSession associated with the this request or, if if there is no current session and create is true, returns a new session. 7 Locale getLocale()

Returns an array of String objects containing all of the values the given request parameter has, or null if the parameter does not exist. 27 boolean isSecure() Returns a boolean indicating whether this request was made using a secure channel, such as HTTPS. 28 int getContentLength() Returns the length, in bytes, of the request body and made available by the input stream, or -1 if the length is not known. 29 int getIntHeader(String name) Returns the value of the specified request header as an int. 30 int getServerPort() Returns the port number on which this request was received. String paramValue = request . getHeader ( paramName ); Enumeration headerNames = request . getHeaderNames (); while ( headerNames . hasMoreElements ()) { String paramName = ( String ) headerNames . nextElement (); accept */* accept- language en-us user-agent Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; InfoPath.2; MS- RTC LM 8) accept- encoding gzip, deflate host localhost:8080

connection Keep-Alive cache-control no-cache 1 Allow This header specifies the request methods ( GET, POST , etc.) that the server supports. 2 Cache-Control This header specifies the circumstances in which the response document can safely be cached. It can have values public, private or no-cache etc. Public means document is cacheable, Private means document is for a single user and can only be stored in private (nonshared) caches and no-cache means document should never be cached. 3 Connection This header instructs the browser whether to use persistent HTTP connections or not. A value of close instructs the browser not to use persistent HTTP connections and keep- alive means using persistent connections. 4 Content-Disposition This header lets you request that the browser ask the user to save the response to disk in a file of the given name. 5 Content-Encoding This header specifies the way in which the page was encoded during transmission. 6 Content-Language This header signifies the language in which the document is written. For example, en, en-us, ru, etc. 7 Content-Length This header indicates the number of bytes in the response. This information is needed only if the browser is using a persistent (keep-alive) HTTP connection.

8 Content-Type This header gives the MIME ( Multipurpose Internet Mail Extension ) type of the response document. 9 Expires This header specifies the time at which the content should be considered out-of-date and thus no longer be cached. 10 Last-Modified This header indicates when the document was last changed. The client can then cache the document and supply a date by an If-Modified-Since request header in later requests. 11 Location This header should be included with all responses that have a status code in the 300s. This notifies the browser of the document address. The browser automatically reconnects to this location and retrieves the new document. 12 Refresh This header specifies how soon the browser should ask for an updated page. You can specify time in number of seconds after which a page would be refreshed. 13 Retry-After This header can be used in conjunction with a 503 (Service Unavailable) response to tell the client how soon it can repeat its request. 14 Set-Cookie This header specifies a cookie associated with the page. The HttpServletResponse Object 1 String encodeRedirectURL(String url) Encodes the specified URL for use in the sendRedirect method or, if encoding is not needed, returns the URL unchanged.

2 String encodeURL(String url) Encodes the specified URL by including the session ID in it, or, if encoding is not needed, returns the URL unchanged. 3 boolean containsHeader(String name) Returns a boolean indicating whether the named response header has already been set. 4 boolean isCommitted() Returns a boolean indicating if the response has been committed. 5 void addCookie(Cookie cookie) Adds the specified cookie to the response. 6 void addDateHeader(String name, long date) Adds a response header with the given name and date-value. 7 void addHeader(String name, String value) Adds a response header with the given name and value. 8 void addIntHeader(String name, int value) Adds a response header with the given name and integer value. 9 void flushBuffer() Forces any content in the buffer to be written to the client. 10 void reset() Clears any data that exists in the buffer as well as the status code and headers. 11 void resetBuffer() Clears the content of the underlying buffer in the response without clearing headers or status code.

12 void sendError(int sc) Sends an error response to the client using the specified status code and clearing the buffer. 13 void sendError(int sc, String msg) Sends an error response to the client using the specified status. 14 void sendRedirect(String location) Sends a temporary redirect response to the client using the specified redirect location URL. 15 void setBufferSize(int size) Sets the preferred buffer size for the body of the response. 16 void setCharacterEncoding(String charset) Sets the character encoding (MIME charset) of the response being sent to the client, for example, to UTF-8. 17 void setContentLength(int len) Sets the length of the content body in the response In HTTP servlets; this method also sets the HTTP Content-Length header. 18 void setContentType(String type) Sets the content type of the response being sent to the client, if the response has not been committed yet. 19 void setDateHeader(String name, long date) Sets a response header with the given name and date-value. 20 void setHeader(String name, String value) Sets a response header with the given name and value. 21 void setIntHeader(String name, int value)

Sets a response header with the given name and integer value. 22 void setLocale(Locale loc) Sets the locale of the response, if the response has not been committed yet. 23 void setStatus(int sc) Sets the status code for this response. Session Management is a mechanism used by the Web container to store session information for a particular user. There are four different techniques used by Servlet application for session management. They are as follows: 1. Cookies 2. Hidden form field 3. URL Rewriting 4. HttpSession The basic concept behind session is, whenever a user starts using our application, we can save a unique identification information about him, in an object which is available throughout the application, until its destroyed. So wherever the user goes, we will always have his information and we can always manage which user is doing what. Whenever a user wants to exit from your application, destroy the object with his information. HttpSession object is used to store entire session with a specific client. We can store, retrieve and remove attribute from HttpSession object. Any servlet can have access to HttpSession object throughout the getSession() method of the HttpServletRequest object. CREATING NEW SESSION HttpSession session = request.getSession(); - return existing session or create new session HttpSession = request.getSession(true); - always return a new session GETTING A PREEXISTING SESSION HttpSession session = request.getSession(false);

DESTROYING A SESSION session.invalidate(); - destroy a session long getCreationTime() returns the time when the session was created, measu since midnight January 1, 1970 GMT. String getId() returns a string containing the unique identifier assigne long getLastAccessedTime() returns the last time the client sent a request associate int getMaxInactiveInterval() returns the maximum time interval, in seconds. void invalidate() destroy the session boolean isNew() returns true if the session is new else false void setMaxInactiveInterval(int interval) Specifies the time, in seconds,after servlet container w session. index.html < form method =" post " action =" Validate "> User: < input type =" text " name =" user " />< br /> Password: < input type =" text " name =" pass " >< br /> < input type =" submit " value =" submit "> </ form > web.xml

< web-app.. > < servlet > < servlet-name >Validate</ servlet-name > < servlet-class >Validate</ servlet-class > </ servlet > < servlet > < servlet-name >Welcome</ servlet-name > < servlet-class >Welcome</ servlet-class > </ servlet > < servlet-mapping > < servlet-name >Validate</ servlet-name > < url-pattern >/Validate</ url-pattern > </ servlet-mapping > < servlet-mapping > < servlet-name >Welcome</ servlet-name > < url-pattern >/Welcome</ url-pattern > </ servlet-mapping > < welcome-file-list > < welcome-file >index.html</ welcome-file > </ welcome-file-list > </ web-app > Validate.java

import java.io.*; import javax.servlet.*; import javax.servlet.http.*; public class Validate extends HttpServlet { protected void doPost (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response. setContentType ( "text/html;charset=UTF-8" ); Request Attributes Request from client  then web server creates request and response object  servlet works with request  jsp : handles view, creates response  model to perform duties  jsp makes response  sends response back and terminates response and request objects index  page2 servelt  page2.jsp  page3servlet  page3.jsp (request data exists within one request response cycle, new request will be gone) request.setAttribute(“student”, student); String url = “/page2.jsp” RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(url); Dispatcher.forward(request,response); Student student = (Student) request.getAttribute(“student”); SESSION ATTRIBUTES – GET/SET HttpSession session = request.getSession(); Session.setAttribute(“student”, student);

RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(url); Dispatcher.forward(request,response); Student student = (Student) session.getAttribute(“student”); COOKIE Session to session persistence Small piece of data that is stored within a client’s browser when they browse a website Name- value pair Incoming cookies – client to server Outgoing cookies – server to client Cookie name Cookie = new Cookie(“nameCookie”, studentName); nameCookie.setMaxAge(60*60*24*2); naemCookie.setPath(“/”); response.addCookie(ageCookie); ….. Cookie.getName() …. Cookie [] cookies = request.getCookies();

For (int I = 0; I < cookies.length; i++){ Cookie cookie = cookies[i]; Cookie.getName() Cookie.getValue() INTIALIZATION A variable that can be set to be initialized when a servlet object is instantiated Defined when we create the servlet Definition stored in @WebServlet or web.xml Servlet init() method initParams = { @WebInitParam(name = “Title”, value = “Cryptonomicon”, description = “Dr.Piercy’s Favorite Book”), @WebInitParam(name = “Year”, value = “2002”, description = “Copyright year”) Instance Variables Private String title; Private int year; Public void init(ServletConfig config) throws .. This.title = config.getInitParameter(“Title”); This.year = Integer.parseInt(config.getInitParameter(“Year”)); doGet(…) System.out.println(this.title); System.out.println(this.year);

Question 1 (1 point) Saved Which of the following characteristics of Cloud computing refers to the ability to increase and decrease the amount of Cloud resources that are used as needed? Question 1 options: configurable convenient scalability ubiquitous

Question 2 (1 point) Saved Capital Expenses (CAPEX) refers to the costs of acquiring new infrastructure - for example, buying servers to set up on premises. Operating Expenses (OPEX) refers to the costs of ongoing ownership and maintenance. Which of the following is a true statement related to how Cloud computing can impact CAPEX and OPEX? Question 2 options: Moving to cloud computing generally shifts OPEX to CAPEX. Moving to cloud computing generally shifts CAPEX to OPEX. Cloud Computing reduces OPEX to zero. CAPEX is always higher than OPEX. Question 3 (1 point) Saved The allocating or releasing of more IT resources that are of the same type as current resources is referred to as ___________. Question 3 options: horizontal scaling on-premise scaling service scaling vertical scaling

Question 4 (1 point) Saved Cloud services are generally considered to have increased availability and reliability than other types of IT infrastructure. Question 4 options: True False Question 5 (1 point) Saved Which of the following is a risk or challenge that needs to be addressed when considering a move to Cloud Computing? (Select all that apply) Question 5 options: Potential security vulnerabilities Reduced operational governance control Limited portability between cloud providers Regulatory and legal issues across multiple regions Question 6 (1 point) Saved

Cloud computing is often divided into three levels of services - infrastructure-as-a-service (IAAS), platform-as-a-service (PAAS), and software-as-a-service (SAAS). Which of these levels of service deals primarily with the networks, servers and storage? Question 6 options: IAAS PAAS SAAS Question 7 (1 point) Saved Cloud computing is often divided into three levels of services - infrastructure-as-a-service (IAAS), platform-as-a-service (PAAS), and software-as-a-service (SAAS). Which of these levels of service deals primarily adds operating systems and middleware on top of servers network and storage? Question 7 options: SAAS PAAS IAAS Question 8 (1 point) Saved Cloud computing is often divided into three levels of services - infrastructure-as-a-service (IAAS), platform-as-a-service

(PAAS), and software-as-a-service (SAAS). Which of these levels of service allows you to run applications and work with data that is stored in the cloud? Question 8 options: PAAS SAAS IAAS Question 9 (1 point) Saved What is the name of the portal that you should use to access the AWS Cloud services for your work in this course? Question 9 options: MyAWS AWS Educate Cloud Labs Offering Undergraduate Development Amazon Web Portal Question 10 (1 point) Saved AWS __________ consist of one or more discrete data centers, each with redundant power, networking and connectivity, housed in separate facilities. Question 10 options:

spot instances regions edge locations availability zones Question 11 (1 point) Saved The __________________ is a web application for managing Amazon Web Services that provides an interactive user interface for performing many AWS tasks. Question 11 options: AWS Prime AWS Management Console AWS Cloudwatch AWS Region Selector Question 12 (1 point) Saved Which of the following AWS services allows you to rent virtual computers on which to run your own computer applications? Question 12 options: EC2

SageMaker S3 RDS Question 13 (1 point) Saved Which of the following AWS services allows you simply to store and retrieve any amount of data at any time, from anywhere on the web? Question 13 options: EC2 S3 SageMaker RDS Question 14 (1 point) Saved Which of the following AWS services will you use for posting and hosting your static web pages for the module assignment? Question 14 options: EC2 RDS

S3 SageMaker Question 15 (1 point) Saved After posting your web pages to your AWS S3 bucket, which of the following represents the form of the URL to the home page of your static web site? Question 15 options: https://<your.name>.mist4630.bucket/index.html http://s3.amazonaws.com/your.name>.mist4630.bucket/index.html http://s3.amazonaws.com/index.html You can think of Compute-as-a-Service (CaaS) as being the subset of Platform-as-a-Service (PaaS) that has a focus on computer processing. TRUE The AWS compute service that lets you rent virtual computers on which to run their own computer applications is known as _ EC2 How many keys do you need to include when setting up your AWS credentials in the Eclipse AWS Toolkit? 4 When setting up an EC2 instance you should select the region. A region is a geographic area that contains one or more data centers with the hardware where your instance will "live."

TRUE Platform-as-a-Service provides more than just infrastructure by adding middleware, development tools, business intelligence (BI) services, database management systems, and more. TRUE After you set up an EC2 instance, you can access and manage it in which of the following ways? Using the AWS Console When setting up an EC2 instance, you must specify a template that contains a software configuration for your instance. Which of the following is the AWS name for such a template. AMAZON MACHINE IMAGE Which of the following AWS services allows you to deploy your dynamic applications without your having to manually set up servers or storage? Elastic Beanstalk Which of the following are considered to be benefits of using EC2? (Select all that apply) Question 9 options: ELASTIC WEB-SCALE COMPUTING FLEXIBLE CLOUD HOSTING SERVICES INTEGRATED SECURE

After starting EC2 instances or deploying to Elastic Beanstalk, you can leave those components running as long as you want without using AWS credit or incurring a charge. FALSE Which of the following state management techniques is useful for passing data between components only during one request/response event? Question 1 options: A) storing data as request attributes Which of the following state management techniques is useful for keeping data persistent as long as a user keeps a session open to our application? Question 2 options: A) storing data as session attributes Which of the following state management techniques is useful for storing small amounts of data on the client side so that it can be retreived by the server during a later session? D) storing data as a cookie Which of the following state management techniques is best for storing large amounts of data that will persist for a relatively long timeframe? Question 4 options: A) B) storing data in a database We can set the initial state of a servlet using initialization parameters.

TRUE Which of the following statements will store an object called student temporarily so that it can be passed to and used by a view component? The object will no longer be available once the response is sent by the server. D) request.setAttribute("student", student); Which of the following statements will retrieve an object called student that has been stored temporarily (until the response is sent) so that it can be used to create the view? C) Student student = (Student) request.getAttribute("student"); Which of the following statements can be used to store a value that will persist from the time it is stored until a user is no longer actively visiting a site? ) D) HttpSession session = request.getSession(); session.setAttribute("student", student); Which of the following statements will allow us to access a session attribute and store it as a local variable? C) Student student = (Student) session.getAttribute("student"); To store a cookie on the client, add it to the request object and, to retrieve a cookie from the client, you retrieve it off of the response object. FALSE Multiple cookies can be carried at one time by a request. TRUE Which of the following statements can be used to create a cookie that will be sent to the client?

Cookie nameCookie = new Cookie("nameCookie", studentNam e); response.addCookie(nameCookie); Which of the following servlet methods is the best place to include code that will retrieve servlet initialization parameters? init() Which of the following statements will retrieve a servlet initialization paramater and store it as a serlvet instance variable? this . title = config .getInitParameter( "Title" ); MVC QUIZ When setting up a servlet, we need to create a ___________ to the servlet that will be used to set up any hyperlinks or form actions so that they will send a request for the servlet. Question 1 options: hyperlink action submission

URL mapping method Which of the following Java commands will declare and instance of a Java model class called User when included within a JSP or servlet file? Question 2 options: <%@ page import="model.User" %> <%= user.declare() %> user == instanceOf User User user = new User(); The request and response objects need to be declared before we can use them within our JSP code. Question 3 options: FALSE Which of the following are created when the Web Server receives a request to hold any data that is sent from the client? Question 4 options: Data Object Request Object Session Object Response Object

With the MVC design pattern, which of the following server side separation of concerns will be generally implemented using Java Servlets? Question 5 options: Modeling our business components Handle client-side behavior. Create the appropriate response to send to the client. Receive a request and control which components act on the request. Suppose that a user enters the value 21 into a textbox called age. This value is sent along with the request to a JSP file. When the value is retrieved using the request.getParameter("age") method, what is the default data type for this method? Question 6 options: String int request text When you submit a form using the HTTP _________ method, any data in the form is concatenated to the URL shown in the browser.Correct. Question 7 options: get post .getParameter()

.getAttribute() Which of the following delimiters in a JSP file signals to the server that some Java code is included in the file? Question 8 options: <...> <!-- ... --> </.../> <%...%> What is the name of the servlet method that will execute when the following html form is received? <form name="guessForm" action="guess" method="post" > <label> First Name: </label> <input type="text" name="fName" value="" /> <br /> <input type="submit" name="guessButton" value="Go" / > </form>

Question 9 options: doGet() setName() submit() doPost() The request and response objects are available to the doGet() and doPost() methods because they are passed as parameters for these methods by the Web server. Question 10 options: True False A JSP is capable of acting as both the controller and the view component of the MVC design pattern, but it is often used just to handle the view. Question 11 options: True False Which of the following are valid default file names for the welcome file of an Eclipse Java Dynamic Web Application? Select all that apply. Question 12 options: index.html index.jsp Index.html Index.jsp default.jsp

page1.jsp What is the name of the servlet method that will execute when the following html form is received? <form name="guessForm" action="guess" method="get" > <label> First Name: </label> <input type="text" name="fName" value="" /> <br /> <input type="submit" name="guessButton" value="Go" / > </form> Question 13 options: submit() setName() doGet() doPost() With the MVC design pattern, which of the following server side separation of concerns will be generally implemented using plain old java objects (POJOs)? Question 14 options: Receive a request and control which components act on the request. Modeling our business components

Handle client-side behavior. Create the appropriate response to send to the client. Which of the following delimiters in a JSP file signals to the server that that a Java expression will be printed to the response object? Question 15 options: <!-- ... --> <%= ... %> <% ... %> </.../> Which of the following are created when the Web Server receives a request to hold the results that are to be sent back to the client? Question 16 options: Request Object Response Object Session Object Data Object When you submit a form using the HTTP _________ method, any data in the form is added to the HTTP request message but not visible in the browser. Question 17 options:

post .getParameter() .getAttribute() get The request and response objects persist as long as the user continues to send requests to the server side application. Question 18 options: True False Previous PageNext Page With the MVC design pattern, it is possible to include multiple JSPs to provide different view options. Question 19 options: True False Previous PageNext Page Which of the following Java statements can be used to retreive the data submitted by the textbox on this form as a String? <form name="guessForm" action="guess" method="get" > <label> First Name: </label> <input type="text" name="fName" value="" /><br /> <input type="submit" name="guessButton" value="Go" / > </form>

Question 20 options: String fName = request.getParameter("text"); String fName = request.getString("fName"); String fName = request.getParameter("fName"); String fName = request.getString("text"); Which of the following is a valid URL mapping annotation that appears in a servlet? Question 21 options: doPost(urlPattern) doGet(urlPattern) @annotation(urlPatterns = { "/guess" }) @WebServlet(urlPatterns = { "/guess" }) For our purposes, Apache Tomcat serves as the Web Server component for testing our applications, locally. Question 22 options: True False When adding a servlet to an Eclipse Dynamic Web Project, where is the best place to store the servlet within the project? Question 23 options: directly in the src folder a package in the src folder Java Libraries

Web Content folder A servlet is capable of handling both the controller and view concerns but it is best at handling the controller concern. Question 24 options: True False With the MVC design pattern, which of the following server side separation of concerns will be generally implemented using JSPs? Question 25 options: Handle client-side behavior. Modeling our business components Create the appropriate response to send to the client. Receive a request and control which components act on the request.