Question 1

Write a Java method that prints the phrase "Five purple people eaters were seen munching Martians".

Accepted Answer

/** void method that prints a phrase */ public void printPhrase() { System.out.println("Five purple people eaters were seen munching Martians!"); }

Question 2

Add two constructors to the Appointment class created in question #9.Include a default constructor and a constructor to initialize an Appointment to suitable arguments.

Accepted Answer

/** Class constructors */ public Appointment() { startTime = 0; endTime = 0; dayOfWeek = ""; month = ""; day = 0; year = 0; } public Appointment(int st,int et,String dow,String m,int d,int y) { setStartTime(st); setEndTime(et); setDayOfWeek(dow); setMonth(m); setDay(d); setYear(y); }

Question 3

Write a method called power the computes xn where x and n and positive integers.The method has two integer parameters and returns a value of type long.

Accepted Answer

/** x and n are nonnegative integers */ public long power(int x,int n) { long result = 1; /** check for positive numbers */ if((x >= 0)&& (n >= 0)) { /** raise x to the nth power */ for(int i = n; i > 0; i--) result *= x; } else { result = 0; System.out.println("Fatal error.......positive integers required!"); } return result; }

Question 4

A _________ states what is assumed to be true when the method is called.

Accepted Answer

A) prescript 
B) postscript 
C) precondition 
D) postcondition 
A) prescript 
B) postscript 
C) precondition 
D) postcondition

Question 5

Discuss the importance of accessor and mutator methods and how they apply to the abstraction concept.

Accepted Answer

It is considered good programming practi

Question 6

In Java,call-by-value is only used with:

Accepted Answer

A) objects 
B) primitive types 
C) this 
D) all of the above 
A) objects 
B) primitive types 
C) this 
D) all of the above

Question 7

Two methods that are expected to be in all Java classes are:

Accepted Answer

A) getName and setName 
B) toString and equals 
C) compareTo and charAt 
D) toLowerCase and toUpperCase 
A) getName and setName 
B) toString and equals 
C) compareTo and charAt 
D) toLowerCase and toUpperCase

Question 8

An invocation of a method that returns a value can be used as an expression any place that a value of the Type_Returned can be used.

Accepted Answer

A) True 
 B)False

Question 9

Discuss the public and private modifiers in context of methods and instance variables.

Accepted Answer

The modifiers public and private can bot

Question 10

The body of a method that returns a value must contain at least one _________ statement.

Accepted Answer

A) void 
B) invocation 
C) thows 
D) return 
A) void 
B) invocation 
C) thows 
D) return

Question 11

The Java language supports global variables.

Accepted Answer

A) True 
 B)False

Question 12

Accessor methods:

Accepted Answer

A) return something equivalent to the value of an instance variable. 
B) promotes abstraction 
C) both A and B 
D) none of the above 
A) return something equivalent to the value of an instance variable. 
B) promotes abstraction 
C) both A and B 
D) none of the above

Question 13

It is considered good programming practice to validate a value passed to a mutator method before setting the instance variable.

Accepted Answer

A) True 
 B)False

Question 14

Java supports operator overloading.

Accepted Answer

A) True 
 B)False

Question 15

Write a Java class that represents a Student with instance variables name,id,and gpa.Include constructors,accessor,mutator and any facilitator methods you may need.

Accepted Answer

public class Student { private String na

Question 16

A variable whose meaning is confined to a method definition is called an/a

Accepted Answer

A) instance variable 
B) local variable 
C) global variable 
D) none of the above 
A) instance variable 
B) local variable 
C) global variable 
D) none of the above

Question 17

A method that performs some action other than returning a value is called a __________ method.

Accepted Answer

A) null 
B) void 
C) public 
D) private 
A) null 
B) void 
C) public 
D) private

Question 18

Boolean expressions may be used to control if-else or while statements.

Accepted Answer

A) True 
 B)False

Question 19

Only the default constructor has the this parameter.

Accepted Answer

A) True 
 B)False

Question 20

Write a driver program to test your Student class created in question #14.

Accepted Answer

public class StudentTest { public static

Write a Java method that prints the phrase "Five purple people eaters were seen munching Martians".

Add two constructors to the Appointment class created in question #9.Include a default constructor and a constructor to initialize an Appointment to suitable arguments.

Write a method called power the computes xⁿ where x and n and positive integers.The method has two integer parameters and returns a value of type long.

A _________ states what is assumed to be true when the method is called.

Discuss the importance of accessor and mutator methods and how they apply to the abstraction concept.

In Java,call-by-value is only used with:

Two methods that are expected to be in all Java classes are:

An invocation of a method that returns a value can be used as an expression any place that a value of the Type_Returned can be used.

Discuss the public and private modifiers in context of methods and instance variables.

The body of a method that returns a value must contain at least one _________ statement.

The Java language supports global variables.

Accessor methods:

It is considered good programming practice to validate a value passed to a mutator method before setting the instance variable.

Java supports operator overloading.

Write a Java class that represents a Student with instance variables name,id,and gpa.Include constructors,accessor,mutator and any facilitator methods you may need.

A variable whose meaning is confined to a method definition is called an/a

A method that performs some action other than returning a value is called a __________ method.

Boolean expressions may be used to control if-else or while statements.

Only the default constructor has the this parameter.

Write a driver program to test your Student class created in question #14.

Getting Started

Console Input and Output

Flow of Control

Defining Classes Ii

Arrays

Inheritance

Console Input and Output

Exception Handling

File IO

Uml and Patterns

Interfaces and Inner Classes

Generics and the Arraylist Class

Linked Data Structures

Collections and Iterators

Swing I

Swing II

Java Never Ends

Recursion

Applets

Filters

Exam 4: Defining Classes I

Write a Java method that prints the phrase "Five purple people eaters were seen munching Martians".

Add two constructors to the Appointment class created in question #9.Include a default constructor and a constructor to initialize an Appointment to suitable arguments.

Write a method called power the computes xn where x and n and positive integers.The method has two integer parameters and returns a value of type long.

A _________ states what is assumed to be true when the method is called.

Discuss the importance of accessor and mutator methods and how they apply to the abstraction concept.

In Java,call-by-value is only used with:

Two methods that are expected to be in all Java classes are:

An invocation of a method that returns a value can be used as an expression any place that a value of the Type_Returned can be used.

Discuss the public and private modifiers in context of methods and instance variables.

The body of a method that returns a value must contain at least one _________ statement.

The Java language supports global variables.

Accessor methods:

It is considered good programming practice to validate a value passed to a mutator method before setting the instance variable.

Java supports operator overloading.

Write a Java class that represents a Student with instance variables name,id,and gpa.Include constructors,accessor,mutator and any facilitator methods you may need.

A variable whose meaning is confined to a method definition is called an/a

A method that performs some action other than returning a value is called a __________ method.

Boolean expressions may be used to control if-else or while statements.

Only the default constructor has the this parameter.

Write a driver program to test your Student class created in question #14.

Getting Started

Console Input and Output

Flow of Control

Defining Classes Ii

Arrays

Inheritance

Console Input and Output

Exception Handling

File IO

Uml and Patterns

Interfaces and Inner Classes

Generics and the Arraylist Class

Linked Data Structures

Collections and Iterators

Swing I

Swing II

Java Never Ends

Recursion

Applets

Filters

Write a method called power the computes xⁿ where x and n and positive integers.The method has two integer parameters and returns a value of type long.