Question 1

Math static method random generates a random double value in the range from 0.0

Accepted Answer

A)  up to but not including 1.0 
B)  up to and including 1.0 
C)  up to and including 100.0 
D)  up to but not including 100.0 
A)  up to but not including 1.0 
B)  up to and including 1.0 
C)  up to and including 100.0 
D)  up to but not including 100.0

Question 2

Information is passed to a method in ________.

Accepted Answer

A)  the method name 
B)  that method's return 
C)  the method body 
D)  the arguments to the method 
A)  the method name 
B)  that method's return 
C)  the method body 
D)  the arguments to the method

Question 3

When an object is concatenated with a String, ________.

Accepted Answer

A)  a compilation error occurs 
B)  a runtime error occurs 
C)  the object's toString method is implicitly called to obtain the String representation of the object 
D)  the object's class name is concatenated with the String 
A)  a compilation error occurs 
B)  a runtime error occurs 
C)  the object's toString method is implicitly called to obtain the String representation of the object 
D)  the object's class name is concatenated with the String

Question 4

Which of the following methods is not in the Math class?

Accepted Answer

A)  ceil 
B)  abs 
C)  parseInt 
D)  log 
A)  ceil 
B)  abs 
C)  parseInt 
D)  log

Question 5

Which of these statements best defines scope?

Accepted Answer

A)  Scope refers to the classes that have access to a variable. 
B)  Scope determines whether a variable's value can be altered. 
C)  Scope is the portion of a program that can refer to an entity by its simple name. 
D)  Scope allows the programmer to use a class without using its fully qualified name. 
A)  Scope refers to the classes that have access to a variable. 
B)  Scope determines whether a variable's value can be altered. 
C)  Scope is the portion of a program that can refer to an entity by its simple name. 
D)  Scope allows the programmer to use a class without using its fully qualified name.

Question 6

Which of the following statements describes block scope?

Accepted Answer

A)  It begins at the opening { of the class declaration and terminates at the closing }. 
B)  It limits label scope to only the method in which it is declared. 
C)  It begins at the identifier's declaration and ends at the terminating right brace (}). 
D)  It is valid for one statement only. 
A)  It begins at the opening { of the class declaration and terminates at the closing }. 
B)  It limits label scope to only the method in which it is declared. 
C)  It begins at the identifier's declaration and ends at the terminating right brace (}). 
D)  It is valid for one statement only.

Question 7

Which of the following methods are overloaded with respect to one another? public int max (int a, int b) { … }
Public double max (double a, double b) { … }
Public int max (int a, int b, int c) { … }
Public double max (double a, double b, double c) { … }

Accepted Answer

A)  A and B are overloaded; C and D are overloaded. 
B)  A and C are overloaded; B and D are overloaded. 
C)  A, B and C are overloaded. 
D)  All four methods are overloaded. 
A)  A and B are overloaded; C and D are overloaded. 
B)  A and C are overloaded; B and D are overloaded. 
C)  A, B and C are overloaded. 
D)  All four methods are overloaded.

Question 8

Which of the following promotions of primitive types is not allowed to occur?

Accepted Answer

A)  char to int. 
B)  double to float. 
C)  int to double. 
D)  short to long. 
A)  char to int. 
B)  double to float. 
C)  int to double. 
D)  short to long.

Question 9

Identifiers in Java have ________ and ________ scopes?

Accepted Answer

A)  method, class. 
B)  class, block. 
C)  block, statement. 
D)  statement, file. 
A)  method, class. 
B)  class, block. 
C)  block, statement. 
D)  statement, file.

Question 10

A Java class can have which of the following methods? 
A. void foo(int a)
B. void foo(int a, int b)
C. void foo(double a)
D. void foo(double a, double b)
E. void foo(int b)

Accepted Answer

A)  All of the above. 
B)  A, B, D, E. 
C)  A, B, C, D. 
D)  A, C, D, E. 
A)  All of the above. 
B)  A, B, D, E. 
C)  A, B, C, D. 
D)  A, C, D, E.

Question 11

Any field declared with keyword ________ is constant.

Accepted Answer

A)  static 
B)  const 
C)  constant 
D)  final 
A)  static 
B)  const 
C)  constant 
D)  final

Question 12

The identifiers in an enumeration ________.

Accepted Answer

A)  must be unique. 
B)  may be duplicated. 
C)  must be lowercase letters and cannot contain numbers. 
D)  must be uppercase letters and cannot contain numbers. 
A)  must be unique. 
B)  may be duplicated. 
C)  must be lowercase letters and cannot contain numbers. 
D)  must be uppercase letters and cannot contain numbers.

Question 13

Method log takes the logarithm of its argument with respect to what base?

Accepted Answer

A)  10 
B)  e 
C)  2 
D)  pi 
A)  10 
B)  e 
C)  2 
D)  pi

Question 14

In a class containing methods with the same name, the methods are distinguished by ________.

Accepted Answer

A)  Number of arguments 
B)  Types of arguments 
C)  Return type 
D)  (a) and (b) 
E)  (b) and (c) 
A)  Number of arguments 
B)  Types of arguments 
C)  Return type 
D)  (a) and (b) 
E)  (b) and (c)

Question 15

The jjava.text package contains classes for manipulating all of the following items except ________.

Accepted Answer

A)  classes 
B)  numbers 
C)  strings 
D)  characters 
A)  classes 
B)  numbers 
C)  strings 
D)  characters

Question 16

Which statement below could be used to simulate the outputs of tossing a quarter to get heads or tails? Suppose randomNumbers is a SecureRandom object.

Accepted Answer

A)  randomNumbers.nextInt(7); 
B)  randomNumbers.nextInt(2); 
C)  randomNumbers.nextInt(1); 
D)  randomNumbers.nextInt(25); 
A)  randomNumbers.nextInt(7); 
B)  randomNumbers.nextInt(2); 
C)  randomNumbers.nextInt(1); 
D)  randomNumbers.nextInt(25);

Question 17

To declare a method as static, place the keyword static before ________ in the method's declaration.

Accepted Answer

A)  the method modifier 
B)  the return type 
C)  the method name 
D)  the argument list 
A)  the method modifier 
B)  the return type 
C)  the method name 
D)  the argument list

Question 18

If more method calls occur than can have their activation records stored on the program execution stack, an error known as a ________ occurs.

Accepted Answer

A)  stack overflow. 
B)  stack rewind. 
C)  stack full. 
D)  stack empty. 
A)  stack overflow. 
B)  stack rewind. 
C)  stack full. 
D)  stack empty.

Exam 6: Methods: a Deeper Look

Math static method random generates a random double value in the range from 0.0

Information is passed to a method in ________.

When an object is concatenated with a String, ________.

Which of the following methods is not in the Math class?

Which of these statements best defines scope?

Which of the following statements describes block scope?

Which of the following methods are overloaded with respect to one another? public int max (int a, int b) { … } Public double max (double a, double b) { … } Public int max (int a, int b, int c) { … } Public double max (double a, double b, double c) { … }

Which of the following promotions of primitive types is not allowed to occur?

Identifiers in Java have ________ and ________ scopes?

A Java class can have which of the following methods? A. void foo(int a) B. void foo(int a, int b) C. void foo(double a) D. void foo(double a, double b) E. void foo(int b)

Any field declared with keyword ________ is constant.

The identifiers in an enumeration ________.

Method log takes the logarithm of its argument with respect to what base?

In a class containing methods with the same name, the methods are distinguished by ________.

The jjava.text package contains classes for manipulating all of the following items except ________.

Which statement below could be used to simulate the outputs of tossing a quarter to get heads or tails? Suppose randomNumbers is a SecureRandom object.

To declare a method as static, place the keyword static before ________ in the method's declaration.

If more method calls occur than can have their activation records stored on the program execution stack, an error known as a ________ occurs.

Introduction to Computers, the Internet and Java

Introduction to Java Applications; Inputoutput and Operators

Introduction to Classes, Objects, Methods and Strings

Control Statements: Assignment, and Operators

Control Statements: Logical Operators

Arrays and Arraylists

Classes and Objects: a Deeper Look

Object-Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism and Interfaces

Exception Handling: a Deeper Look

Javafx Graphical User Interfaces

Javafx Gui

Strings, Characters and Regular Expressions

Files, Inputoutput Streams, Nio and Xml Serialization

Generic Collections

Lambdas and Streams

Recursion

Searching, Sorting and Big O

Generic Classes and Methods: a Deeper Look

Custom Generic Data Structures

Concurrency

Accessing Databases With Jdbc

Swing Gui Components

Graphics and Java 2d

Networking

Java Persistence Api Jpa

Javaserver Faces Web Apps

Javaserver Faces Web Apps

Swing Gui Components

Filters

Identifiers in Java have and scopes?