CP4P_SDLC_Activity_Answers

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Apr 3, 2024

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Computer Principles for Programmers APIs, SDLC, Version Control Using Mozilla Firefox is strongly recommended for this Activity because it can transform JSON responses into a human readable format. (Raw Data > "Pretty Print") (#) is points for API and Time Zone questions. 1. (5) What is sent via the API from one system to another? What is sent back? API sends: API stands for Application programming interface and allows different systems to communicate and interact with each other. One system sends a request to another system with API. This request includes specific information such as the request method, header, parameters, and body. Request methods can be GET, POST, PUT, DELETE, etc., and headers include metadata for the request. Parameters are additional data values sent along with the request to provide specific instructions. The body contains the main data, and it usually is in a structured format like JSON or XML. Sent back: When a system receives the API request, processes it, and generates a response to it. This response includes the status code, headers, and a body/payload. The status code is a number that shows the outcome of the request. For example, 200 means a successful request or 500 for server error. The header provides metadata about the response like content type, and authentication-related information. And body contains the actual data or message that is sent back as a response. 2. (5) Use api.agify.io to predict the age of a person using your given name and an ISO country code API URL request: https://api.agify.io/?name=Faeze&country_id=IR JSON response: { "count": 86, "name": "Faeze", "age": 37, "country_id": "IR" } 3. (5) Use the time zone API request at worldtimeapi.org API URL request: http://worldtimeapi.org/api/timezone/America/Regina JSON response: { "abbreviation": "CST", "client_ip": "2607:fea8:3a9f:af70:bc47:ed72:e5d5:ca38", "datetime": "2023-07-15T20:13:33.588872-06:00", "day_of_week": 6, "day_of_year": 196, "dst": false, "dst_from": null, "dst_offset": 0, "dst_until": null, "raw_offset": -21600, "timezone": "America/Regina", "unixtime": 1689473613, CPR101 Summer 2023 Week 9 Page 1 of 6

Computer Principles for Programmers APIs, SDLC, Version Control "utc_datetime": "2023-07-16T02:13:33.588872+00:00", "utc_offset": "-06:00", "week_number": 28 } 4. (16) Using the above JSON data from worldtimeapi.org, fill in the JSON key / value pairs relating to the descriptions in the table below. See Response Schema JSON key JSON value UTC date/time in ISO8601 format utc_datetime 2023-07- 16T02:13:33.588872+00:00 Unix UTC timestamp unixtime 1689473613 Unix UTC to location difference utc_offset -06:00 Location's daylight-saving time difference dst false Location date/time in ISO8601 format datetime 2023-07-15T20:13:33.588872-06:00 How do you calculate the location's timestamp from the UTC timestamp using JSON keys? For converting the UTC timestamp to the location's timestamp, we add the raw offset to the UTC timestamp. In this case, the raw offset is -21600 seconds (-06:00 hours). UTC timestamp: 1689473613 Raw offset: -21600 seconds Unix UTC timestamp - Raw offset: 1689473613 + (-21600) = 1689452013 Calculated location timestamp value is: 1689452013 5. (5) How did you confirm that your location timestamp when converted to data/time was the same as the Location date/time in ISO8601 format in the JSON schema? Show your test and the result. CPR101 Summer 2023 Week 9 Page 2 of 6

Computer Principles for Programmers APIs, SDLC, Version Control SDLC – Software Development Life Cycle 54 points = 9 points × 6 items, 75+ words each Determine : First, I try to read and understand the assignment specification of the IPC class. For understanding, I read the instruction carefully including any accompanying materials or guidelines. I try to take note of any specific instructions or constraints mentioned like required language, or library. After that, I try to identify key requirements and constraints. Make a list of the main tasks or actions that the program should be able to perform. It means identifying input formats and noting any desired or mandatory output formats or results that the program should generate. If I have any doubts or uncertainties regarding the assignment requirements, I try to email my instructor to clear my doubts. By doing this, I can identify the problem and methods that I can use to solve the problem or create a program. By doing these things, I can obtain a comprehensive understanding of the problem and identify the key requirements. This will enable me to proceed with confidence and ensure that my solution aligns with the assignment specifications. Define: To completely understand the problem, I use the following stages to specify the exact requirements and assure a clear understanding of all inputs, processes, and outputs. Analyze the workshop PDF and break down it into smaller components or tasks to gain a better understanding of its structure. By looking at the whole workshop and the expected output in the PDF, I try to identify the main things or concepts involved in the workshop. I try to consider the relationships and interactions between different components. For example, in workshop 8 for IPC, I did my best to understand the relationship between main and functions and how can I implement them. Determine the inputs required for the solution to function correctly. The most important part is identifying the sources of these inputs, such as user input, file input, or API data. In IPC workshops input always are entered by the user. Then I check the valid range for inputs by looking at the expected output and instruction. Determine the expected format, structure, and range of valid inputs. Moreover, determining the expected outputs or results that the solution should produce is very important. Design : CPR101 Summer 2023 Week 9 Page 3 of 6

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Computer Principles for Programmers APIs, SDLC, Version Control The design step in the Software Development Life Cycle (SDLC) is the most important phase where we can plan and outline the solution before diving into coding. It involves creating a blueprint or roadmap for how the software will be developed. In the first step, I have to make the overall architecture and structure of the workshop for myself. Identify the modules or components that need to be developed and their relationships. The most important step is creating pseudocode or a flowchart to document the algorithmic steps of my solution. Pseudocode is a high-level description of the logic and functionality without getting into the syntax of a specific programming language. A flowchart is a visual representation of the sequence of steps and decisions in the solution. Both tools help me visualize and plan the implementation before writing actual code. Pseudocode and flowchart enable me to understand how I should write code for my workshops. For example, how many loops that I need or where can I define validation, etc. Writing comments before writing the actual code can help me to clarify my thinking, articulate my intentions, and plan the structure of my code. By commenting on the purpose of each function, module, or section of code, I can enhance the readability and maintainability of my program. Develop: In this stage, I have to use my design note, flowchart, or pseudocode and make them into actual source code using C language. Based on my understanding I define variables at the first of the program. Also, I try to include comments in my code to provide explanations, clarify the code's purpose, and document any complex logic or algorithms. Comments make my code more understandable and readable by other developers who may work on it in the future. Additionally, it is useful because maybe I will want to refactor or change them in the future. For example, IPC workshops include 3 parts. I use part one in part 2 and sometimes my comments help me to understand the code and change it easier. After completing the code, testing is a critical aspect of the process. I try to use outputs in the workshop and test my code. But in companies, I have to write unit tests. But for my workshop, I use boundary values to test my code and program. If I face errors or unexpected behavior during testing, it's time to debug my code. I try to use an IDE debugger and set breakpoints. And stepping through the code execution to understand how the program behaves. Deliver : I try to follow these steps on the matrix server for submitting my project. I make sure that all necessary files, documentation, and any additional requirements are included. I always pay attention to submission deadlines and any specific instructions provided by my instructor. To submit IPC workshops, I use WinSCP and copy my file into the matrix. Then based on the instruction in PDF I run a command in Putty to compile the code and with a command I sent it to my professor. If I face a problem with submitting, it means if I get an error, I download the desired output from WinSCP and compare it to my output. Most of the time my output has problems like space and uppercase letters. When I want to submit my workshop into the matrix, I have to enter some inputs to get the desired output. These user inputs are important as well for submission. We should enter the correct input same as in the PDF file. The submitter produces an outputmaster.txt and checks my output and all inputs that I enter together. It checks them character by character. If they do not match, the submitter cannot let me submit, and I try to enter the exactly input. Also, it gives us the line number of errors and we can check it. So, I run the command "~profName.proflastname/submit 144w6/NAA_p2". Then I try to enter the correct input to make the desired output. So, the matrix will accept that, and I can submit my assignment. If I have another problem in my code, it shows me the number of lines and I can fix it. For the reflection part, there are some questions at the end of the workshop, and I answer them in a text file. These questions are about challenges, conceptual things, and technical obstacles. CPR101 Summer 2023 Week 9 Page 4 of 6

Computer Principles for Programmers APIs, SDLC, Version Control And based on my code I try to answer these questions and explain how to implement this workshop and how can I fix errors or problems. D'oh : To maintain a code, I try to provide a clear explanation of its functionality usage, and any dependencies or assumptions. I write a document for my code and keep it beside my project. Also, I tend to write comments inside my code for complex parts. Good documentation helps me to understand what the program is, and it enables me to refactor my code in the future. Version control is very helpful for maintaining projects, especially in companies. I utilized a version control system (Git) and track the changes made to my code. For example, for my workshops from Wednesdays to Mondays, I commit my changes regularly and provide a desire commit messages to highlight the modifications made. So, after I complete the code, I can keep the last version of my code. Whenever I need my code, I can fork it from Git and see my changes and comments. This allows you to revert to previous versions if needed and provides a history of the code's evolution. I always try to Break down my code into smaller, self-contained modules or functions that perform specific tasks. Each module should have a well-defined responsibility, making it easier to understand, modify, and maintain. Ensure that modules have clear interfaces and follow established design principles, such as low coupling and high cohesion. All of these make my code more readable and make it easier to maintain. Also, I try to review and refactor my code regularly to improve its design, decrease redundancy, and enhance maintainability. Refactoring involves restructuring the code without changing its external behavior. It helps keep the codebase clean, readable, and adaptable to future changes. Software Version 5 × 2 points each A. Question: What is the name of the software and its current version? Answer: The name of IDE that I am working with is Visual Studio. The version of this IDE is Version 16.11.26. B. Question: What do the components of the version number mean? Answer: "16" represents the major version and indicates initial development. The major version number typically represents significant updates, major releases, or major changes in the software. A change in the major version often indicates compatibility issues with previous versions and may introduce substantial feature enhancements or architectural changes. "11" represents the minor. It usually includes new features, enhancements, and improvements. "26" represents the Micro. It shows the specific build or release of the software. C. Question: CPR101 Summer 2023 Week 9 Page 5 of 6

Computer Principles for Programmers APIs, SDLC, Version Control In what way would that software be forward-compatible? Answer: The software, Visual Studio 2019, would be forward compatible in the sense that projects created or developed using older versions of Visual Studio such as Visual Studio 2017 should be able to be opened, compiled, and run without having problems in Visual Studio 2019. Visual Studio 2019 is designed to be able to open and load projects created using older versions of Visual Studio. Also, it supports the compilation of code written in various programming languages, such as C#, C++, and Visual Basic. It is designed to handle code written in previous versions of these languages, ensuring that projects created with older language versions can still be compiled and built successfully in Visual Studio 2019. Moreover, Visual Studio 2019 includes support for different frameworks, libraries, and platforms used in software development. It ensures to maintain compatibility with older versions of these frameworks and platforms and this ability enables developers to continue working on projects that rely on previous versions without major compatibility issues. Additionally, if you have an application built with an earlier version, you can use Visual Studio 2019's debugging tools to analyze and troubleshoot issues without having to migrate the entire project to the latest version. D. Question: In what way would that software be backward compatible? Answer: Backward compatibility means that the software should be compatible with older versions or previous releases. For this case (Visual Studio), it means that projects and solutions created using older versions can be opened and worked on using version 16.11.26 without significant compatibility issues. The software ensures that it can handle and interpret code, project files, and dependencies from previous versions correctly. E. Question: Find the release notes (AKA changelog) for that software and include the URL, release date, and a description of one of the latest changes. Programmers wrote those notes. It is time someone read them, for example: Answer: https://learn.microsoft.com/en-us/visualstudio/releases/2019/release-notes released April 11th, 2023 - Fixed an issue in IIS Express that could cause a crash when updating telemetry data. - Fixed a crash when invalid input is sent to the driver used during PGO training for kernel mode drivers. CPR101 Summer 2023 Week 9 Page 6 of 6

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