Question 1

Because the || operator performs short-circuit evaluation, your boolean expression will generally be evaluated faster if the subexpression that is most likely to be true is on the left.

Accepted Answer

A) True 
 B)False

Question 2

The expression tested by an if statement must evaluate to:

Accepted Answer

A)   0 or 1
B)   +1 or -1
C)   true or False
D)   t or fE) A) and D)
F) A) and C)

Question 3

What will be printed when the following code is executed?
Int y = 10;
If ( y == 10) 
{
Int x = 30;
X += y;
}
System.out.print("x = ") ;
System.out.print(x) ;

Accepted Answer

A)   x = 30
B)   x = 40
C)   x = 20
D)   x is unknown when the last statement is executed.E) A) and B)
F) A) and C)

Question 4

Unicode is an international encoding system that is extensive enough to represent ALL the characters of ALL the world's alphabets.

Accepted Answer

A) True 
 B)False

Question 5

A flag may have the values:

Accepted Answer

A)   0 or 1
B)   +1 or -1
C)   true or False
D)   of any characterE) A) and B)
F) A) and C)

Question 6

What will be the value of charges after the following code is executed?
Double charges, rate = 7.00;
Int time = 180;
Charges = time <= 119 ?
Rate * 2 :
Time / 60.0 * rate;

Accepted Answer

A)   7.00
B)   14.00
C)   21.00
D)   28.00E) A) and B)
F) B) and C)

Question 7

If you prematurely terminate an if statement with a semicolon, the compiler will:

Accepted Answer

A)   Not display an error message
B)   Assume you are placing a null statement there
C)   All of the above
D)   None of the aboveE) A) and B)
F) A) and C)

Question 8

This is a boolean variable that signals when some condition exists in the program:

Accepted Answer

A)   Sentinel
B)   Block
C)   Flag
D)   CaseE) A) and B)
F) C) and D)

Question 9

This is an international coding system that is extensive enough to represent all the characters of all the world's alphabets:

Accepted Answer

A)   ASCII
B)   Unicode
C)   Java
D)   None of the aboveE) A) and C)
F) All of the above

Question 10

The String.format method works exactly like the System.out.printf method, except that it does not display the formatted string on the screen.

Accepted Answer

A) True 
 B)False

Question 11

The switch statement is a:

Accepted Answer

A)   Multiple alternative decision structure
B)   Nested decision structure
C)   Sequence structure
D)   Test expressionE) All of the above
F) A) and C)

Question 12

What is the value of x after the following code has been executed?
Int x = 75;
Int y = 90;
If ( x != y) 
X += y;

Accepted Answer

A)   75
B)   90
C)   15
D)   165E) None of the above
F) A) and D)

Question 13

________ works like this: If the expression on the left side of the && operator is False, the expression the right side will not be checked.

Accepted Answer

A)   Short-circuit evaluation
B)   Reverse logic
C)   Boolean logic
D)   Relational evaluationE) A) and D)
F) C) and D)

Question 14

What does the following code display?
Int d = 9, e = 12;
System.out.printf("%d %d
", d, e) ;

Accepted Answer

A)   %d %d
B)   9 12
C)   %d 9
D)   %9 %12E) A) and B)
F) B) and C)

Question 15

When two Strings are compared using the compareTo method, the cases of the two strings are not considered.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following will format 12.7801 to display as $12.78?

Accepted Answer

A)   System.out.printf("$%,.2f", 12.7801) ;
B)   System.out.printf("%f", 12.7801) ;
C)   System.out.printf("%.2f  $$", 12.7801) ;
D)   System.out.printf("$d", 12.7801) ; E) A) and C)
F) A) and B)

Question 17

What would be the value of discountRate after the following statements are executed?
Double discountRate = 0.0;
Int purchase = 100;
If (purchase > 1000) 
DiscountRate = .05;
Else if (purchase > 750) 
DiscountRate = .03;
Else if (purchase > 500) 
DiscountRate = .01;

Accepted Answer

A)   .05
B)   .03
C)   .01
D)   0.0E) None of the above
F) A) and C)

Question 18

Programs never need more than one path of execution.

Accepted Answer

A) True 
 B)False

Question 19

The ________ statement is used to make simple decisions in Java.

Accepted Answer

A)   do/while
B)   for
C)   branch
D)   ifE) A) and C)
F) C) and D)

Question 20

In a switch statement, if two different values for the CaseExpression would result in the same code being executed, you must have two copies of the code, one after each CaseExpression.

Accepted Answer

A) True 
 B)False

Exam 3: Decision Structures

Programs never need more than one path of execution.

Correct AnswerverifiedShow Answer

Unicode is an international encoding system that is extensive enough to represent ALL the characters of ALL the world's alphabets.

Correct AnswerverifiedShow Answer

The String.format method works exactly like the System.out.printf method, except that it does not display the formatted string on the screen.

Correct AnswerverifiedShow Answer

The ________ statement is used to make simple decisions in Java.

Correct AnswerverifiedShow Answer

________ works like this: If the expression on the left side of the && operator is False, the expression the right side will not be checked.

Correct AnswerverifiedShow Answer

What is the value of x after the following code has been executed? Int x = 75; Int y = 90; If ( x != y) X += y;

Correct AnswerverifiedShow Answer

In a switch statement, if two different values for the CaseExpression would result in the same code being executed, you must have two copies of the code, one after each CaseExpression.

Correct AnswerverifiedShow Answer

What will be the value of charges after the following code is executed? Double charges, rate = 7.00; Int time = 180; Charges = time <= 119 ? Rate * 2 : Time / 60.0 * rate;

Correct AnswerverifiedShow Answer

If you prematurely terminate an if statement with a semicolon, the compiler will:

Correct AnswerverifiedShow Answer

Because the || operator performs short-circuit evaluation, your boolean expression will generally be evaluated faster if the subexpression that is most likely to be true is on the left.

Correct AnswerverifiedShow Answer

Which of the following will format 12.7801 to display as $12.78?

Correct AnswerverifiedShow Answer

This is an international coding system that is extensive enough to represent all the characters of all the world's alphabets:

Correct AnswerverifiedShow Answer

What will be printed when the following code is executed? Int y = 10; If ( y == 10) { Int x = 30; X += y; } System.out.print("x = ") ; System.out.print(x) ;

Correct AnswerverifiedShow Answer

What would be the value of discountRate after the following statements are executed? Double discountRate = 0.0; Int purchase = 100; If (purchase > 1000) DiscountRate = .05; Else if (purchase > 750) DiscountRate = .03; Else if (purchase > 500) DiscountRate = .01;

Correct AnswerverifiedShow Answer

The switch statement is a:

Correct AnswerverifiedShow Answer

A flag may have the values:

Correct AnswerverifiedShow Answer

What does the following code display? Int d = 9, e = 12; System.out.printf("%d %d\n", d, e) ;

Correct AnswerverifiedShow Answer

When two Strings are compared using the compareTo method, the cases of the two strings are not considered.

Correct AnswerverifiedShow Answer

The expression tested by an if statement must evaluate to:

Correct AnswerverifiedShow Answer

This is a boolean variable that signals when some condition exists in the program:

Correct AnswerverifiedShow Answer

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