Question 1

Which of the following class members should usually be private?

Accepted Answer

A)  Methods. 
B)  Constructors. 
C)  Variables (or fields). 
D)  All of the above. 
A)  Methods. 
B)  Constructors. 
C)  Variables (or fields). 
D)  All of the above.

Question 2

Static class variables:

Accepted Answer

A)  are final. 
B)  are public. 
C)  are private. 
D)  are shared by all objects of a class. 
A)  are final. 
B)  are public. 
C)  are private. 
D)  are shared by all objects of a class.

Question 3

Which of the following statements is false?

Accepted Answer

A)  If a program uses multiple classes from the same package, these classes can access each other's package access members directly through references to objects of the appropriate classes, or in the case of static members, through the class name. 
B)  Package access is rarely used. 
C)  Classes in the same source file are part of the same package. 
D)  Use the access modifier package to give a method or variable package access. 
A)  If a program uses multiple classes from the same package, these classes can access each other's package access members directly through references to objects of the appropriate classes, or in the case of static members, through the class name. 
B)  Package access is rarely used. 
C)  Classes in the same source file are part of the same package. 
D)  Use the access modifier package to give a method or variable package access.

Question 4

Composition is sometimes referred to as a(n) ________.

Accepted Answer

A)  is-a relationship 
B)  has-a relationship 
C)  many-to-one relationship 
D)  one-to-many relationship 
A)  is-a relationship 
B)  has-a relationship 
C)  many-to-one relationship 
D)  one-to-many relationship

Question 5

BigDecimal gives you control over how values are rounded. By default:

Accepted Answer

A)  all calculations are approximate and no rounding occurs. 
B)  all calculations are approximate and rounding occurs. 
C)  all calculations are exact and no rounding occurs. 
D)  all calculations are exact and rounding occurs. 
A)  all calculations are approximate and no rounding occurs. 
B)  all calculations are approximate and rounding occurs. 
C)  all calculations are exact and no rounding occurs. 
D)  all calculations are exact and rounding occurs.

Question 6

Which statement is false?

Accepted Answer

A)  The compiler always creates a default constructor for a class. 
B)  If a class's constructors all require arguments and a program attempts to call a no-argument constructor to initialize an object of the class, a compilation error occurs. 
C)  A constructor can be called with no arguments only if the class does not have any constructors or if the class has a public no-argument constructor. 
D)  None of the above. 
A)  The compiler always creates a default constructor for a class. 
B)  If a class's constructors all require arguments and a program attempts to call a no-argument constructor to initialize an object of the class, a compilation error occurs. 
C)  A constructor can be called with no arguments only if the class does not have any constructors or if the class has a public no-argument constructor. 
D)  None of the above.

Question 7

Which syntax imports all static members of class Math?

Accepted Answer

A)  import java.lang.Math.*. 
B)  import static java.lang.Math.*. 
C)  import static java.lang.Math. 
D)  None of the above. 
A)  import java.lang.Math.*. 
B)  import static java.lang.Math.*. 
C)  import static java.lang.Math. 
D)  None of the above.

Which of the following class members should usually be private?

Static class variables:

Which of the following statements is false?

Composition is sometimes referred to as a(n) ________.

BigDecimal gives you control over how values are rounded. By default:

Which statement is false?

Which syntax imports all static members of class Math?

Introduction to Computers and Java

Introduction to Java Applications

Control Statements

Control Statements

Methods

Arrays and Arraylists

Introduction to Classes and Objects

Object Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

Exception Handling

Gui Components

Graphics and Java 2D

Fundamentals of Characters and Strings

Files, Streams and Object Serialization

Generic Collections

Lambdas

Recursion

Searching, Sorting and Big O

Generic Classes and Methods

Custom Generic Data Structures

GUI

Concurrency

Accessing Databases With JDBC

JavaFX

Filters

Exam 8: Classes and Objects: a Deeper Look

Which of the following class members should usually be private?

Static class variables:

Which of the following statements is false?

Composition is sometimes referred to as a(n) ________.

BigDecimal gives you control over how values are rounded. By default:

Which statement is false?

Which syntax imports all static members of class Math?

Introduction to Computers and Java

Introduction to Java Applications

Control Statements

Control Statements

Methods

Arrays and Arraylists

Introduction to Classes and Objects

Object Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

Exception Handling

Gui Components

Graphics and Java 2D

Fundamentals of Characters and Strings

Files, Streams and Object Serialization

Generic Collections

Lambdas

Recursion

Searching, Sorting and Big O

Generic Classes and Methods

Custom Generic Data Structures

GUI

Concurrency

Accessing Databases With JDBC

JavaFX

Filters