Big Java Late Objects
2nd Edition
ISBN: 9781119330455
Author: Horstmann
Publisher: WILEY
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Textbook Question
Chapter 5.1, Problem 2SC
What is the return value of the method call Math.pow(Math.pow(2, 2), 2)?
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Consider the following database for some store:
Customers (cid, cname, city, discount)Agents (aid, aname, city, percent)Products (pid, pname, city, quantity, price)Orders (ordno, mon, cid, aid, pid, qty, dollars)
The relation Customers records the ID (cid), name (cname), location (city) of each customer and a discount percentage (discount) for this customer.
The relation Agents records the ID (aid), name (aname), location (city) of each agent and a transaction fee (percent) charged by this agent.
The relation Products lists the ID (pid), name (pname), location (city), quantity and price of available products.
And finally, the relation Orders contains a unique order number (ordno), the month (mon), customer (cid), agent (aid), product (pid), quantity (qty) of each order as well as the total value (dollars) of the transaction.
1. Express the following query in SQL
(a) List customers (names) who do not have discounts but purchased at least one product of price greater than $50.
(b) Find…
Consider the following relational schema and briefly answer the questions that follow:
Emp(eid: integer, ename: string, age: integer, salary: real)
Works(eid: integer, did: integer, pct_time: integer)
Dept(did: integer, budget: real, managerid: integer)
a. Define a table constraint on Dept that will ensure that all managers have age > 30.
b. Write SQL statements to delete all information about employees whose salaries exceed that of the manager of one or more departments that they work in. Be sure to ensure that all the relevant integrity constraints are satisfied after your updates.
Consider the following relations:
Student(snum: integer, sname: string, rmajor: string,
level: string, age: integer)
Class(cname: string, meets_at: time, room: string, fid: integer)
Enrolled(snum: integer, cname: string)
Faculty(fid: integer, fname: string, deptid: integer)
The meaning of these relations is straightforward; for example, Enrolled has one record per student-class pair such that the student is enrolled in the class.
2. Express each of the following integrity constraints in SQL unless it is implied by the primary and foreign key constraint; if so, explain how it is implied. If the constraint cannot be expressed in SQL, say so. For each constraint, state what operations (inserts, deletes, and updates on specific relations) must be monitored to enforce the constraint.
(a) Every faculty member must teach at least two courses.
(b) Every student must be enrolled in the course called 'Math101'.
(c) A student cannot add more than two courses at a time…
Chapter 5 Solutions
Big Java Late Objects
Ch. 5.1 - Consider the method call Math.pow(3, 2). What are...Ch. 5.1 - What is the return value of the method call...Ch. 5.1 - The Math.ceil method in the Java standard library...Ch. 5.1 - It is possible to determine the answer to Self...Ch. 5.2 - What is the value of cubeVolume(3)?Ch. 5.2 - Prob. 6SCCh. 5.2 - Provide an alternate implementation of the body of...Ch. 5.2 - Declare a method squareArea that computes the area...Ch. 5.2 - Consider this method: public static int...Ch. 5.3 - What does this program print? Use a diagram like...
Ch. 5.3 - Prob. 11SCCh. 5.3 - What does this program print? Use a diagram like...Ch. 5.4 - Prob. 13SCCh. 5.4 - What does this method do? public static boolean...Ch. 5.4 - Implement the mystery method of Self Check 14 with...Ch. 5.5 - How do you generate the following printout, using...Ch. 5.5 - Prob. 17SCCh. 5.5 - Prob. 18SCCh. 5.5 - Prob. 19SCCh. 5.5 - The boxString method contains the code for...Ch. 5.6 - Consider the following statements: int...Ch. 5.6 - Consider this method that prints a page number on...Ch. 5.6 - Consider the following method that computes...Ch. 5.6 - The comment explains what the following loop does....Ch. 5.6 - In Self Check 24, you were asked to implement a...Ch. 5.7 - Explain how you can improve the intName method so...Ch. 5.7 - Prob. 27SCCh. 5.7 - What happens when you call intName(0)? How can you...Ch. 5.7 - Trace the method call intName(72), as described in...Ch. 5.7 - Prob. 30SCCh. 5.8 - Which lines are in the scope of the variable i...Ch. 5.8 - Which lines are in the scope of the parameter...Ch. 5.8 - The program declares two local variables with the...Ch. 5.8 - There is a scope error in the mystery method. How...Ch. 5.8 - Prob. 35SCCh. 5.9 - Consider this slight modification of the...Ch. 5.9 - Consider this recursive method: public static int...Ch. 5.9 - Consider this recursive method: public static int...Ch. 5.9 - Prob. 39SCCh. 5.9 - The intName method in Section 5.7 accepted...Ch. 5 - In which sequence are the lines of the Cubes.java...Ch. 5 - Write method headers for methods with the...Ch. 5 - Give examples of the following methods from the...Ch. 5 - Prob. 4RECh. 5 - Consider these methods: public static double...Ch. 5 - Prob. 6RECh. 5 - Design a method that prints a floating-point...Ch. 5 - Write pseudocode for a method that translates a...Ch. 5 - Describe the scope error in the following program...Ch. 5 - For each of the variables in the following...Ch. 5 - Prob. 11RECh. 5 - Perform a walkthrough of the intName method with...Ch. 5 - Consider the following method: public static int...Ch. 5 - Consider the following method that is intended to...Ch. 5 - Suppose an ancient civilization had constructed...Ch. 5 - Give pseudocode for a recursive method for...Ch. 5 - Give pseudocode for a recursive method that sorts...Ch. 5 - Write the following methods and provide a program...Ch. 5 - Write the following methods and provide a program...Ch. 5 - Prob. 4PECh. 5 - Prob. 5PECh. 5 - Prob. 6PECh. 5 - Prob. 7PECh. 5 - Prob. 8PECh. 5 - Write methods public static double...Ch. 5 - Write a recursive method public static String...Ch. 5 - Write a recursive method public static boolean...Ch. 5 - Use recursion to implement a method public static...Ch. 5 - Use recursion to determine the number of digits in...Ch. 5 - Write a method that computes the balance of a bank...Ch. 5 - Write a method that tests whether a file name...Ch. 5 - It is a well-known phenomenon that most people are...Ch. 5 - Prob. 3PPCh. 5 - Use recursion to compute an, where n is a positive...Ch. 5 - Leap years. Write a method public static boolean...Ch. 5 - In Exercise P3.13 you were asked to write a...Ch. 5 - Prob. 10PPCh. 5 - Write a program that reads two strings containing...Ch. 5 - Prob. 12PPCh. 5 - Write a program that reads words and arranges them...Ch. 5 - Prob. 14PPCh. 5 - Write a program that reads two fractions, adds...Ch. 5 - Write a program that prints the decimal expansion...Ch. 5 - Write a program that reads a decimal expansion...Ch. 5 - Write two methods public static void...Ch. 5 - Write a program that reads in the width and height...Ch. 5 - Repeat Exercise P5.19 with hexagonal circle...Ch. 5 - Postal bar codes. For faster sorting of letters,...Ch. 5 - Write a program that reads in a bar code (with :...Ch. 5 - Write a program that converts a Roman number such...Ch. 5 - A non-governmental organization needs a program to...Ch. 5 - Having a secure password is a very important...Ch. 5 - Prob. 30PPCh. 5 - Prob. 31PPCh. 5 - Electric wire, like that in the photo, is a...Ch. 5 - The drag force on a car is given by FD=12v2ACD...
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- Consider the following relational schema. An employee can work in more than one department; the pct_time field of the Works relation shows the percentage of time that a given employee works in a given department. Emp(eid: integer, ename: string, age: integer, salary: real) Works(eid: integer, did: integer, pct_time: integer) Dept(did: integer, budget: real, managerid: integer) Write the following queries in SQL: a. Print the name of each employee whose salary exceeds the budget of all of the departments that he or she works in. b. Find the enames of managers who manage only departments with budgets larger than $1 million, but at least one department with budget less than $5 million.arrow_forwardConsider the following schema: Suppliers(sid: integer, sname: string, address: string) Parts(pid: integer, pname: string, color: string) Catalog(sid: integer, pid: integer, cost: real) The Catalog relation lists the prices charged for parts by suppliers. Write the following queries in SQL: a. Find the sids of suppliers who charge more for some part than the average cost of that part (averaged over all the suppliers who supply that part). b. Find the sids of suppliers who supply a red part or a green part. c. For every supplier that supplies a green part and a red part, print the name and price of the most expensive part that she supplies.arrow_forwardThe following relations keep track of airline flight information: Flights(flno: integer, from: string, to: string, distance: integer, departs: time, arrives: time, price: integer) Aircraft(aid: integer, aname: string, cruisingrange: integer) Certified(eid: integer, aid: integer) Employees(eid: integer, ename: string, salary: integer) Note that the Employees relation describes pilots and other kinds of employees as well; every pilot is certified for some aircraft, and only pilots are certified to fly. Write each of the following queries in SQL.(Additional queries using the same schema are listed in the exercises for Chapter 4) a. Identify the routes that can be piloted by every pilot who makes more than $100,000. b. Print the name and salary of every nonpilot whose salary is more than the average salary for pilots. c. Print the names of employees who are certified only on aircrafts with cruising range longer than 1000 miles and who are certified on some Boeing…arrow_forward
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