Deck 3: Decision Structures

Question 1

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

A) ASCII
B) Unicode
C) Java
D) None of the above

Answer 1

B

Question 2

What will be the value of x after the following code is executed?
Int x = 75;
Int y = 60;
If (x > y)
X = x - y;

A) 75
B) 15
C) 60
D) 135

Answer 2

B

Question 3

If chr is a character variable, which of the following if statements is written correctly?

A) if (chr = "a")
B) if (chr == "a")
C) if (chr = 'a')
D) if (chr == 'a')

Answer 3

D

Question 4

What will be the value of ans after the following code has been executed?
Int ans = 10;
Int x = 65;
Int y = 55;
If (x >= y)
Ans = x + y;

A) 10
B) 120
C) 100
D) No value, there is a syntax error.

Question 5

In most editors, you are indenting by one level each time that you press this key:

A) Tab
B) Shift
C) Alt
D) Space

Question 6

What would be the value of bonus after the following statements are executed?
Int bonus, sales = 1250;
If (sales > 1000)
Bonus = 100;
If (sales > 750)
Bonus = 50;
If (sales > 500)
Bonus = 25;
Else
Bonus = 0;

A) 100
B) 500
C) 25
D) 0

Question 7

This type of operator determines whether a specific relationship exists between two values:

A) Logical
B) Mathematical
C) Unary
D) Relational

Question 8

What would be the value of bonus after the following statements are executed?
Int bonus, sales = 85000;
Char dept = 'S';
If (sales > 100000)
If (dept == 'R')
Bonus = 2000;
Else
Bonus = 1500;
Else if (sales > 75000)
If (dept == 'R')
Bonus = 1250;
Else
Bonus = 1000;
Else
Bonus = 0;

A) 2000
B) 1500
C) 1250
D) 1000

Question 9

In Java, when a character is stored in memory, it is actually stored as a(n):

A) Unicode number
B) ASCII character code
C) EBCDIC character code
D) Morse code

Question 10

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

A) do/while
B) for
C) branch
D) if

Question 11

Which of the following is the correct boolean expression to test for: int x being a value between, but not including, 500 and 650, or int y not equal to 1000?

A) ((x >= 500 && x <= 650) && (y != 1000))
B) ((x > 500 AND x < 650) OR !(y.equal(1000)))
C) ((x > 500 && x < 650) || (y != 1000))
D) ((x < 500 && x > 650) || !(y == 1000))

Question 12

A block of code is enclosed in a set of:

A) braces { }
B) parentheses ( )
C) double quotes " "
D) brackets [ ]

Question 13

A flag may have the values:

A) 0 or 1
B) +1 or -1
C) true or False
D) of any character

Question 14

What will be the value of ans after the following code has been executed?
Int x = 90, y = 55, ans = 10;
If ( x == y);
Ans *= 2;

A) 10
B) 145
C) 20
D) No value, there is a syntax error.

Question 15

A Boolean expression is one that is either:

A) true or False
B) x or y
C) Positive or negative
D) None of the above

Question 16

Which one of the following is the not equal operator?

A) <>
B) NOT
C) *&
D) !=

Question 17

Which of the following expressions will determine whether x is less than or equal to y?

A) x > y
B) x =< y
C) x <= y
D) x >= y

Question 18

What will be the values of ans, x, and y after the following statements are executed?
Int ans = 35, x = 50, y =50;
If ( x >= y)
{
Ans = x + 10;
X -=y;
}
Else
{
Ans = y + 10;
Y += x;
}

A) ans = 60, x = 50, y =100
B) ans = 60, x =0, y =50
C) ans = 45, x = 50, y = 0
D) ans = 45, x = 50, y = 50

Question 19

What will be the value of bonus after the following code is executed?
Int bonus, sales = 10000;
If (sales < 5000)
Bonus = 200;
Else if (sales < 7500)
Bonus = 500;
Else if (sales < 10000)
Bonus = 750;
Else if (sales < 20000)
Bonus = 1000;
Else
Bonus = 1250;

A) 200
B) 500
C) 750
D) 1000
E) 1250

Question 20

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

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

Question 21

Enclosing a group of statements inside a set of braces creates a:

A) block of statements
B) boolean expression
C) loop
D) nothing, it is just for readability

Question 22

Which of the following correctly tests the char variable chr to determine whether it is NOT equal to the character B?

A) if (chr > 'B')
B) if (chr < 'B')
C) if (chr != 'B')
D) if (chr != "B")

Question 23

What will be the value of pay after the following statements are executed?
Int hours = 45;
Double pay, payRate = 10.00;
Pay = hours <= 40 ?
Hours * payRate :
40 * payRate + (hours - 40) * payRate * 1.5;

A) 400.00
B) 450.00
C) 465.00
D) 475.00

Question 24

Which of the following will format 12.78 to display as 12.8%?

A) System.out.printf("%2.1d%", 12.78);
B) System.out.printf("%.2f%%", 12.78);
C) System.out.printf("%1.2d%", 12.78);
D) System.out.printf("%.1f%%", 12.78);

Question 25

What will be the values of ans, x, and y after the following statements are executed?
Int ans = 0, x = 15, y =25;
If ( x >= y)
{
Ans = x + 10;
X -=y;
}
Else
{
Ans = y + 10;
Y += x;
}

A) ans = 0, x = 15, y = 25
B) ans = 25, x = -10, y = 25
C) ans = 35, x = 15, y = 40
D) ans = 25, x = 15, y = 40

Question 26

What will be printed when the following code is executed?
Double x = 45678.259;
System.out.printf("%,.2f", x);

A) 45678.259
B) 0,045,678.26
C) 45,678.26
D) 45,678.3

Question 27

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

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

Question 28

To do a case insensitive compare which of the following could be used to test the equality of two strings, str1 and str2?

A) (str1.equalsIgnoreCase(str2))
B) (str1.compareToIgnoreCase(str2) == 0)
C) Only A
D) A and B

Question 29

In an if/else statement, if the boolean expression is False:

A) the first statement or block is executed
B) the statement or block following the else is executed
C) all statements or blocks are executed
D) no statements or blocks are executed

Question 30

The expression tested by an if statement must evaluate to:

A) 0 or 1
B) +1 or -1
C) true or False
D) t or f

Question 31

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;

A) )05
B) )03
C) )01
D) 0.0

Question 32

What is the value of ans after the following code has been executed?
Int x = 35;
Int y = 20, ans = 80;
If (x < y);
Ans += y;

A) 80
B) 100
C) 35
D) 55

Question 33

If str1 and str2 are both Strings, which of the following will correctly test to determine whether str1 is less than str2?
(1) (str1 < str2)
(2) (str1.equals(str2) < 0)
(3) (str1.compareTo(str2) < 0)

A) 1, 2, and 3 will all work
B) 2
C) 3
D) 2 and 3

Question 34

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

A) Sentinel
B) Block
C) Flag
D) Case

Question 35

What would be the value of x after the following statements were executed?
Int x = 10;
Switch (x)
{
Case 10:
X += 15;
Case 12:
X -= 5;
Break;
Default:
X *= 3;
}

A) 5
B) 20
C) 25
D) 30

Question 36

These operators use two operands:

A) Unary
B) Binary
C) Tertiary
D) None of the above

Question 37

What would be the value of discountRate after the following statements are executed?
Double discountRate = 0.0;
Int purchase = 1250;
If (purchase > 1000)
DiscountRate = .05;
If (purchase > 750)
DiscountRate = .03;
If (purchase > 500)
DiscountRate = .01;
Else
DiscountRate = 0;

A) )05
B) )03
C) )01
D) 0

Question 38

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

A) 75
B) 90
C) 15
D) 165

Question 39

What would be the value of discountRate after the following statements are executed?
Double discountRate = 0.0;
Int purchase = 1250;
Char cust = 'N';
If (purchase > 1000)
If (cust == 'Y')
DiscountRate = .05;
Else
DiscountRate = .04;
Else if (purchase > 750)
If (cust == 'Y')
DiscountRate = .04;
Else
DiscountRate = .03;
Else
DiscountRate = 0;

A) )05
B) )04
C) )03
D) 0

Question 40

What is the value of ans after the following code has been executed?
Int x = 40;
Int y = 40;
Int ans = 0;
If (x = y)
Ans = x + 10;

A) 50
B) 80
C) 30
D) No value, this is a syntax error.

Question 41

Which of the following is the correct boolean expression to test for: int x being a value less than or equal to 500 or greater than 650, and int y not equal to 1000?

A) ((x >= 500 && x <650) && (y != 1000))
B) ((x <= 500 OR x > 650) AND !(y.equal(1000)))
C) ((x >= 500 || x < 650) || (y != 1000))
D) ((x <= 500 || x > 650) && !(y == 1000))

Question 42

The switch statement is a:

A) Multiple alternative decision structure
B) Nested decision structure
C) Sequence structure
D) Test expression

Question 43

Programs never need more than one path of execution.

Question 44

Because the && operator performs short-circuit evaluation, your boolean expression will usually execute faster if the subexpression that is most likely False is on the left of the && operator.

Question 45

When testing for character values, the switch statement does not test for the case of the character.

Question 46

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

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);

Question 47

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

A) %d %d
B) 9 12
C) %d 9
D) %9 %12

Question 48

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

Question 49

An important style rule you should follow when writing if statements is to line up the conditionally executed statement with the if statement.

Question 50

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);

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

Question 51

What would be the value of discountRate after the following statements are executed?
Double discountRate;
Char custType = 'B';
Switch (custType)
{
Case 'A':
DiscountRate = .08;
Break;
Case 'B':
DiscountRate = .06;
Case 'C':
DiscountRate = .04;
Default:
DiscountRate = 0.0;
}

A) )08
B) )06
C) )04
D) 0.0

Question 52

The if/else statement will execute one group of statements if its boolean expression is true or another group if its boolean expression is False.

Question 53

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;

A) 7.00
B) 14.00
C) 21.00
D) 28.00

Question 54

If str1 and str2 are both Strings, which of the following expressions will correctly determine whether they are equal?
(1)(str1 == str2)
(2) str1.equals(str2)
(3)(str1.compareTo(str2) == 0)

A) 1, 2, and 3 will all work
B) 1 and 2
C) 1 and 3
D) 2 and 3

Question 55

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.

Question 56

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

Question 57

What does the following code display?
Double x = 12.3798146;
System.out.printf("%.2f\n", x);

A) 123798146
B) 1238
C) %12.38
D) 12.38

Question 58

What will be printed when the following code is executed?
Double x = 45678.259;
String output = String.format("%,.1f", x);
System.out.println(output);

A) 45678.259
B) 45,678.259
C) 45,678.26
D) 45,678.3

Question 59

A local variable's scope always ends at the closing brace of the block of code in which it is declared.

Question 60

An important style rule you should adopt for writing if statements is to write the conditionally executed statement on the line after the if statement.

Question 61

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

Question 62

In a switch statement, each of the case values must be unique.

Question 63

The System.out.printf method formats a string and displays it in the console window.

Question 64

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.