Question 1

Which of the following is NOT true about static methods?

Accepted Answer

A)  It is not necessary for an instance of the class to be created to execute the method. 
B)  They are created by placing the key word static after the access specifier in the method header. 
C)  They are called from an instance of the class. 
D)  They are often used to create utility classes that perform operations on data, but have no need to collect and store data. 
A)  It is not necessary for an instance of the class to be created to execute the method. 
B)  They are created by placing the key word static after the access specifier in the method header. 
C)  They are called from an instance of the class. 
D)  They are often used to create utility classes that perform operations on data, but have no need to collect and store data.

Question 2

If a class has a method named finalize, it is called automatically just before an instance of the class is destroyed by the garbage collector.

Accepted Answer

A) True 
 B)False

Question 3

If you have defined a class named SavingsAccount with a public static data member named numberOfAccounts, and created a SavingsAccount object referenced by the variable account20, which of the following will assign numberOfAccounts to numAccounts?

Accepted Answer

A)  numAccounts = account20.numAccounts; 
B)  numAccounts = numberOfAccounts; 
C)  numAccounts = SavingsAccount.numberOfAccounts; 
D)  None of the above, you cannot reference a static data member. 
A)  numAccounts = account20.numAccounts; 
B)  numAccounts = numberOfAccounts; 
C)  numAccounts = SavingsAccount.numberOfAccounts; 
D)  None of the above, you cannot reference a static data member.

Question 4

The names of the enum constants in an enumerated data type must be enclosed in quotation marks.

Accepted Answer

A) True 
 B)False

Question 5

To compare two objects in a class:

Accepted Answer

A)  use the == operator, e.g. object1 == object2 
B)  write a method to do a byte-by-byte compare of the two objects 
C)  write an equals method that will make a field by field compare of the two objects 
D)  Since objects consist of several fields, you cannot compare them 
A)  use the == operator, e.g. object1 == object2 
B)  write a method to do a byte-by-byte compare of the two objects 
C)  write an equals method that will make a field by field compare of the two objects 
D)  Since objects consist of several fields, you cannot compare them

Question 6

If object1 and object2 are objects of the same class, to make object2 a copy of object1:

Accepted Answer

A)  assign object1 to object2, such as object2 = object1; 
B)  write a copy method that will make a field by field copy of object1 data members into object2 data members 
C)  use the Java copy method that is a part of the Java language 
D)  use the default constructor to create object2 with object1 data members 
A)  assign object1 to object2, such as object2 = object1; 
B)  write a copy method that will make a field by field copy of object1 data members into object2 data members 
C)  use the Java copy method that is a part of the Java language 
D)  use the default constructor to create object2 with object1 data members

Question 7

The whole-part relationship created by object aggregation is more often called:

Accepted Answer

A)  a has a relationship 
B)  an inner class relationship 
C)  an extra class relationship 
D)  an inside class relationship 
A)  a has a relationship 
B)  an inner class relationship 
C)  an extra class relationship 
D)  an inside class relationship

Question 8

An object's ________ is simply the data that is stored in the object's fields at any given moment.

Accepted Answer

A)  value 
B)  assessment 
C)  record 
D)  state 
A)  value 
B)  assessment 
C)  record 
D)  state

Question 9

If you write a toString method for a class, Java will automatically call the method any time you concatenate an object of the class with a string.

Accepted Answer

A) True 
 B)False

Question 10

When a method's return type is a class, what is actually returned to the calling program?

Accepted Answer

A)  An object of that class 
B)  A reference to an object of that class 
C)  Only the values in the object that the method accessed 
D)  Nothing, the return type is strictly for documentation in this situation. 
A)  An object of that class 
B)  A reference to an object of that class 
C)  Only the values in the object that the method accessed 
D)  Nothing, the return type is strictly for documentation in this situation.

Which of the following is NOT true about static methods?

If a class has a method named finalize, it is called automatically just before an instance of the class is destroyed by the garbage collector.

If you have defined a class named SavingsAccount with a public static data member named numberOfAccounts, and created a SavingsAccount object referenced by the variable account20, which of the following will assign numberOfAccounts to numAccounts?

The names of the enum constants in an enumerated data type must be enclosed in quotation marks.

To compare two objects in a class:

If object1 and object2 are objects of the same class, to make object2 a copy of object1:

The whole-part relationship created by object aggregation is more often called:

An object's ________ is simply the data that is stored in the object's fields at any given moment.

If you write a toString method for a class, Java will automatically call the method any time you concatenate an object of the class with a string.

When a method's return type is a class, what is actually returned to the calling program?

Introduction to Computers and Java

Java Fundamentals

Decision Structures

Loops and Files

Methods

A First Look at Classes

Arrays and the Arraylist Class

Text Processing and More About Wrapper Classes

Inheritance

Exceptions and Advanced File IO

A First Look at GUI Applications

Advanced GUI Applications

Applets and More

Creating GUI Applications With Javafx and Scene Builder

Recursion

Databases

Filters

Exam 8: A Second Look at Classes and Objects

Which of the following is NOT true about static methods?

If a class has a method named finalize, it is called automatically just before an instance of the class is destroyed by the garbage collector.

If you have defined a class named SavingsAccount with a public static data member named numberOfAccounts, and created a SavingsAccount object referenced by the variable account20, which of the following will assign numberOfAccounts to numAccounts?

The names of the enum constants in an enumerated data type must be enclosed in quotation marks.

To compare two objects in a class:

If object1 and object2 are objects of the same class, to make object2 a copy of object1:

The whole-part relationship created by object aggregation is more often called:

An object's ________ is simply the data that is stored in the object's fields at any given moment.

If you write a toString method for a class, Java will automatically call the method any time you concatenate an object of the class with a string.

When a method's return type is a class, what is actually returned to the calling program?

Introduction to Computers and Java

Java Fundamentals

Decision Structures

Loops and Files

Methods

A First Look at Classes

Arrays and the Arraylist Class

Text Processing and More About Wrapper Classes

Inheritance

Exceptions and Advanced File IO

A First Look at GUI Applications

Advanced GUI Applications

Applets and More

Creating GUI Applications With Javafx and Scene Builder

Recursion

Databases

Filters