Question 1

Which of the following methods of java.lang.Object compares an object to its argument?

Accepted Answer

A)  boolean equals(Object obj) 
B)  int hashCode() 
C)  Object clone() 
D)  String toString() 
A)  boolean equals(Object obj) 
B)  int hashCode() 
C)  Object clone() 
D)  String toString()

Question 2

In UML class diagrams, the ____ sign next to the method names indicate that the methods are public.

Accepted Answer

A)  @ 
B)  * 
C)  + 
D)  - 
A)  @ 
B)  * 
C)  + 
D)  -

Question 3

Which of the following statements is correct?

Accepted Answer

A)  If a checked exception is likely to be caught in a higher-level method, declare that it can occur using a catch clause. 
B)  If an exception is recoverable in the current method, handle the exception in the current method. 
C)  If an unchecked exception is is likely to be caught in a higher-level method, use a @catch tag to document this fact in the Javadoc comment for the method. 
D)  If an unchecked exception is likely to be caught in a higher-level method, declare that it can occur using a throws clause. 
A)  If a checked exception is likely to be caught in a higher-level method, declare that it can occur using a catch clause. 
B)  If an exception is recoverable in the current method, handle the exception in the current method. 
C)  If an unchecked exception is is likely to be caught in a higher-level method, use a @catch tag to document this fact in the Javadoc comment for the method. 
D)  If an unchecked exception is likely to be caught in a higher-level method, declare that it can occur using a throws clause.

Question 4

The class ____________________ is the superclass of all exceptions.

Accepted Answer

The answer of The class ____________________ is the superclass of...

Question 5

Which of the following would cause an ArrayIndexOutOfBounds error?

Accepted Answer

A) public boolean setElementOfX(int index, int val) { if(index >= 0 && index 0) inputFileName = args[0]; else inputFileName = "Phone.dat"; } C) for (int i = 0; i = 0 && index 0) inputFileName = args[0]; else inputFileName = "Phone.dat"; } C) for (int i = 0; i

Question 6

A major reason for the popularity of object-oriented programming is that it enables programmers to reuse previously written code saved as classes.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following statements is correct?

Accepted Answer

A)  is-a and has-a relationships cannot be combined. 
B)  An abstract class can be instantiated. 
C)  An abstract class cannot declare abstract methods. 
D)  In Java, a variable of a superclass type can reference an object of a subclass type. 
A)  is-a and has-a relationships cannot be combined. 
B)  An abstract class can be instantiated. 
C)  An abstract class cannot declare abstract methods. 
D)  In Java, a variable of a superclass type can reference an object of a subclass type.

Question 8

The ____________________ is thrown when a program attempts to convert a non-numeric string to a numeric value.

Accepted Answer

NumberForm

Question 9

The ____ represent error conditions that may occur as a result of programmer error or as a result of serious external conditions that are considered unrecoverable.

Accepted Answer

A)  unchecked exceptions 
B)  run-time error 
C)  checked exceptions 
D)  exception 
A)  unchecked exceptions 
B)  run-time error 
C)  checked exceptions 
D)  exception

Question 10

The combination of data together with its methods is called a(n) ____________________ data type.

Accepted Answer

The answer of The combination of data together with its...

Question 11

A Java interface is a(n) ____ between the interface designer and the programmer who codes a class that implements the interface.

Accepted Answer

A)  precondition 
B)  postcondition 
C)  message 
D)  contract 
A)  precondition 
B)  postcondition 
C)  message 
D)  contract

Question 12

The call to ____ invokes the constructor for the current class whose parameter list matches the argument list.

Accepted Answer

A)  super() 
B)  super 
C)  this() 
D)  abstract 
A)  super() 
B)  super 
C)  this() 
D)  abstract

Question 13

If no constructors are defined for a class, the ____ constructor for that class will be provided by default.

Accepted Answer

A)  private 
B)  super 
C)  public 
D)  no-parameter 
A)  private 
B)  super 
C)  public 
D)  no-parameter

Question 14

Which of the following is a RuntimeException?

Accepted Answer

A)  AssertionErorr 
B)  FileNotFoundException 
C)  IllegalArgumentException 
D)  UnknownError 
A)  AssertionErorr 
B)  FileNotFoundException 
C)  IllegalArgumentException 
D)  UnknownError

Question 15

____________________ errors are mistakes in your use of the grammar of the Java language.

Accepted Answer

The answer of ____________________ errors are mistakes in your use...

Question 16

Java automatically applies the ____________________ method to an object referenced in a String expression.

Accepted Answer

The answer of Java automatically applies the ____________________ method to...

Question 17

____________________ visibility is for members of a class that should not be accessible to anyone but the class, not even classes that extend it.

Accepted Answer

The answer of ____________________ visibility is for members of a...

Question 18

One way to make code reusable is to ____________________ or combine data elements together with methods that operate on that data in a separate program module.

Accepted Answer

The answer of One way to make code reusable is...

Question 19

Having multiple methods with the same name but different signatures in a class is called ____________________.

Accepted Answer

method ove

Question 20

Which of the following statements is correct?

Accepted Answer

A)  Interfaces can define instance variables and methods. 
B)  Abstract classes can define constants. 
C)  Interfaces can extend another class. 
D)  Instances of abstract classes can be created. 
A)  Interfaces can define instance variables and methods. 
B)  Abstract classes can define constants. 
C)  Interfaces can extend another class. 
D)  Instances of abstract classes can be created.

Which of the following methods of java.lang.Object compares an object to its argument?

In UML class diagrams, the ____ sign next to the method names indicate that the methods are public.

Which of the following statements is correct?

The class ____________________ is the superclass of all exceptions.

Which of the following would cause an ArrayIndexOutOfBounds error?

A major reason for the popularity of object-oriented programming is that it enables programmers to reuse previously written code saved as classes.

Which of the following statements is correct?

The ____________________ is thrown when a program attempts to convert a non-numeric string to a numeric value.

The ____ represent error conditions that may occur as a result of programmer error or as a result of serious external conditions that are considered unrecoverable.

The combination of data together with its methods is called a(n) ____________________ data type.

A Java interface is a(n) ____ between the interface designer and the programmer who codes a class that implements the interface.

The call to ____ invokes the constructor for the current class whose parameter list matches the argument list.

If no constructors are defined for a class, the ____ constructor for that class will be provided by default.

Which of the following is a RuntimeException?

____________________ errors are mistakes in your use of the grammar of the Java language.

Java automatically applies the ____________________ method to an object referenced in a String expression.

____________________ visibility is for members of a class that should not be accessible to anyone but the class, not even classes that extend it.

One way to make code reusable is to ____________________ or combine data elements together with methods that operate on that data in a separate program module.

Having multiple methods with the same name but different signatures in a class is called ____________________.

Which of the following statements is correct?

Lists and the Collections Framework

Testing and Debugging

Stacks and Queues

Recursion

Trees

Sets and Maps

Sorting

Self-Balancing Search Trees

Graphs

Introduction to Java

Overview of UML

Filters

Exam 1: Object-Oriented Programming and Class Hierarchies

Which of the following methods of java.lang.Object compares an object to its argument?

In UML class diagrams, the ____ sign next to the method names indicate that the methods are public.

Which of the following statements is correct?

The class ____________________ is the superclass of all exceptions.

Which of the following would cause an ArrayIndexOutOfBounds error?

A major reason for the popularity of object-oriented programming is that it enables programmers to reuse previously written code saved as classes.

Which of the following statements is correct?

The ____________________ is thrown when a program attempts to convert a non-numeric string to a numeric value.

The ____ represent error conditions that may occur as a result of programmer error or as a result of serious external conditions that are considered unrecoverable.

The combination of data together with its methods is called a(n) ____________________ data type.

A Java interface is a(n) ____ between the interface designer and the programmer who codes a class that implements the interface.

The call to ____ invokes the constructor for the current class whose parameter list matches the argument list.

If no constructors are defined for a class, the ____ constructor for that class will be provided by default.

Which of the following is a RuntimeException?

____________________ errors are mistakes in your use of the grammar of the Java language.

Java automatically applies the ____________________ method to an object referenced in a String expression.

____________________ visibility is for members of a class that should not be accessible to anyone but the class, not even classes that extend it.

One way to make code reusable is to ____________________ or combine data elements together with methods that operate on that data in a separate program module.

Having multiple methods with the same name but different signatures in a class is called ____________________.

Which of the following statements is correct?

Lists and the Collections Framework

Testing and Debugging

Stacks and Queues

Recursion

Trees

Sets and Maps

Sorting

Self-Balancing Search Trees

Graphs

Introduction to Java

Overview of UML

Filters