Question 1

Variables of the boolean data type are useful for

Accepted Answer

A)   evaluating conditions that are either true or false.
B)   working with small integers.
C)   working with very large integers.
D)   evaluating scientific notation.E) A) and C)
F) B) and D)

Question 2

Which of the following statements correctly creates a Scanner object for keyboard input?

Accepted Answer

A)   Scanner kbd = new Scanner(System.keyboard) ;
B)   Scanner keyboard = new Scanner(System.in) ;
C)   Scanner keyboard(System.in) ;
D)   Keyboard scanner = new Keyboard(System.in) ;E) C) and D)
F) A) and D)

Question 3

The ________ method is used to display a message dialog.

Accepted Answer

A)   showMessageDialog
B)   messageDialog
C)   messageDialogShow
D)   showDialogE) C) and D)
F) A) and D)

Question 4

Which of the following statements will correctly convert the data type, if x is a float and y is a double?

Accepted Answer

A)   x = float y;
B)   x = <float>y;
C)   x = (float) y;
D)   x = y;E) A) and D)
F) C) and D)

Question 5

Programming style includes techniques for consistently putting spaces and indentation in a program so visual cues are created.

Accepted Answer

A) True 
 B)False

Question 6

What will be the displayed when the following code is executed?
Final int x = 22, y = 4;
Y += x;
System.out.println("x = " + x + ", y = " + y) ;

Accepted Answer

A)   x = 22, y = 26
B)   x = 22, y = 4
C)   x = 22, y = 88
D)   Nothing. There is an error in the code.E) B) and C)
F) A) and C)

Question 7

The Java API provides a class named Math, which contains numerous methods that are useful for performing complex mathematical operations.

Accepted Answer

A) True 
 B)False

Question 8

When you call one of the Scanner class's methods to read a primitive value, such as nextInt or nextDouble, and then call the nextLine method to read a string, an annoying and hard-to-find problem can occur.

Accepted Answer

A) True 
 B)False

Question 9

Both character literals and string literals can be assigned to a char variable.

Accepted Answer

A) True 
 B)False

Question 10

Unlike a console program, a program that uses JOptionPane does not automatically stop executing when the end of the main method is reached.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following statements is invalid?

Accepted Answer

A)   double r = 9.4632E15;
B)   double r = 9.4632e15;
C)   double r = 2.9X106;
D)   double r = 326.75;E) B) and C)
F) A) and D)

Question 12

Named constants are initialized with a value, and that value cannot change during the execution of the program.

Accepted Answer

A) True 
 B)False

Question 13

Character literals are enclosed in ________, and string literals are enclosed in ________.

Accepted Answer

A)   single quotes, double quotes
B)   double quotes, single quotes
C)   single quotes, single quotes
D)   double quotes, double quotesE) None of the above
F) A) and C)

Question 14

This is a named storage location in the computer's memory.

Accepted Answer

A)   Operator
B)   Constant
C)   Literal
D)   VariableE) A) and B)
F) A) and C)

Question 15

What is the result of the following expression? 
17 % 3 * 2 - 12 + 15

Accepted Answer

A)   105
B)   12
C)   7
D)   8E) A) and D)
F) All of the above C

Question 16

The boolean data type may contain the following range of values:

Accepted Answer

A)   -128 to +127.
B)   true or false.
C)   -2,147,483,648 to +2,147,483,647.
D)   -32,768 to +32,767.E) All of the above
F) A) and B)

Question 17

A(n)  ________ is a dialog box that prompts the user for input.

Accepted Answer

A)   input box
B)   user prompt
C)   adaptive dialog
D)   input dialogE) All of the above
F) None of the above D

Question 18

What will be displayed after the following statements have been executed?
Int x = 15, y = 20, z = 32;
X += 12;
Y /= 6;
Z -= 14;
System.out.println("x = " + x +
", y = " + y +
", z = " + z) ;

Accepted Answer

A)   x = 27, y = 3.333, z = 18
B)   x = 27, y = 2, z = 18
C)   x = 37, y = -14, z = 4
D)   x = 27, y = 3, z = 18E) A) and B)
F) B) and C)

Question 19

When saving a Java source file, save it with an extension of

Accepted Answer

A)  .java.
B)   .javac.
C)   .src.
D)   .class.E) C) and D)
F) None of the above

Question 20

Which of the following is not a rule that must be followed when naming identifiers?

Accepted Answer

A)   After the first character, you may use the letters a-z, A-Z, an underscore, a dollar sign, or digits 0-9.
B)   Identifiers can contain spaces.
C)   Uppercase and lowercase characters are distinct.
D)   The first character must be one of the letters a-z, A-Z, an underscore or a dollar sign.E) All of the above
F) B) and D) B

Exam 2: Java Fundamentals

Variables of the boolean data type are useful for

Correct AnswerverifiedShow Answer

Which of the following statements correctly creates a Scanner object for keyboard input?

Correct AnswerverifiedShow Answer

The ________ method is used to display a message dialog.

Correct AnswerverifiedShow Answer

Which of the following statements will correctly convert the data type, if x is a float and y is a double?

Correct AnswerverifiedShow Answer

Programming style includes techniques for consistently putting spaces and indentation in a program so visual cues are created.

Correct AnswerverifiedShow Answer

What will be the displayed when the following code is executed? Final int x = 22, y = 4; Y += x; System.out.println("x = " + x + ", y = " + y) ;

Correct AnswerverifiedShow Answer

The Java API provides a class named Math, which contains numerous methods that are useful for performing complex mathematical operations.

Correct AnswerverifiedShow Answer

When you call one of the Scanner class's methods to read a primitive value, such as nextInt or nextDouble, and then call the nextLine method to read a string, an annoying and hard-to-find problem can occur.

Correct AnswerverifiedShow Answer

Both character literals and string literals can be assigned to a char variable.

Correct AnswerverifiedShow Answer

Unlike a console program, a program that uses JOptionPane does not automatically stop executing when the end of the main method is reached.

Correct AnswerverifiedShow Answer

Which of the following statements is invalid?

Correct AnswerverifiedShow Answer

Named constants are initialized with a value, and that value cannot change during the execution of the program.

Correct AnswerverifiedShow Answer

Character literals are enclosed in ________, and string literals are enclosed in ________.

Correct AnswerverifiedShow Answer

This is a named storage location in the computer's memory.

Correct AnswerverifiedShow Answer

What is the result of the following expression? 17 % 3 * 2 - 12 + 15

Correct AnswerverifiedC

The boolean data type may contain the following range of values:

Correct AnswerverifiedShow Answer

A(n) ________ is a dialog box that prompts the user for input.

Correct AnswerverifiedD

What will be displayed after the following statements have been executed? Int x = 15, y = 20, z = 32; X += 12; Y /= 6; Z -= 14; System.out.println("x = " + x + ", y = " + y + ", z = " + z) ;

Correct AnswerverifiedShow Answer

When saving a Java source file, save it with an extension of

Correct AnswerverifiedShow Answer

Which of the following is not a rule that must be followed when naming identifiers?

Correct AnswerverifiedB

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Character literals are enclosed in , and string literals are enclosed in .

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C

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D

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B