Deck 4: Making Decisions

Question 1

This operator represents the logical AND.

A)++
B)| |
C)&&
D)@
E)None of these

Answer 1

&&

Question 2

What is the output of the following segment of code if the value 4 is input by the user when asked to enter a number?

A)0
B)3
C)13
D)28
E)None of these

Answer 2

13

Question 3

This operator takes an operand and reverses its truth or falsehood.

A)| |
B)relational
C)arithmetic
D)!
E)None of these

Answer 3

!

Question 4

When a relational expression is false, it has the value ________.

A)one
B)zero
C)zero, one, or minus one
D)less than zero
E)None of these

Question 5

Whereas < is called a relational operator, x < y is called a(n)________.

A)Arithmetic operator
B)Relative operator
C)Relational expression
D)Largeness test
E)None of these

Question 6

What is assigned to the variable a given the statement below with the following assumptions: x = 10, y = 7, and z, a, and b are all int variables.
a = x >= y;

A)10
B)7
C)The string "x >= y"
D)1
E)0

Question 7

What will the following segment of code output?

A)You failed the test!
B)You passed the test!
C)You failed the test! You passed the test!
D)You failed the test! You did poorly on the test!
E)None of the above

Question 8

Without this statement appearing in a switch construct, the program "falls through" all of the statements below the one with the matching case expression.

A)break
B)exit
C)switch
D)scope
E)None of these

Question 9

If you place a semicolon after the statement: if (x < y)

A)The code will not compile.
B)The compiler will interpret the semicolon as a null statement.
C)The if statement will always evaluate to false.
D)All of the above
E)None of these

Question 10

This is a variable, usually a bool or an int, that signals when a condition exists.

A)relational operator
B)arithmetic operator
C)flag
D)float
E)None of these

Question 11

Assuming x is 5, y is 6, and z is 8, which of the following is false?

A)3, 4, 6, 7 are false.
B)Only 5 is false.
C)3 and 4 are false.
D)All are false.
E)None of these.

Question 12

This operator is used in C++ to represent equality.

A)=
B)><
C)!!
D)==
E)None of these

Question 13

What will be the output of the following code segment after the user enters 0 at the keyboard?

A)Nothing will be displayed.
B)false
C)x
D)true

Question 14

When an if statement is placed within the conditionally-executed code of another if statement, this is known as:

A)complexity
B)overloading
C)nesting
D)validation
E)None of these

Question 15

Input values should always be checked for:

A)Appropriate range
B)Reasonableness
C)Division by zero, if division is taking place
D)All of these
E)None of these

Question 16

After execution of the following code, what will be the value of input_value if the value 0 is entered at the keyboard at run time?

A)15
B)10
C)25
D)0
E)5

Question 17

What will the following segment of code output?

A)This is a test question!
B)Congratulations! That's a high score! This is a test question!
C)That's a high score! This is a test question!
D)Congratulations! That's a high score!
E)None of these

Question 18

This statement uses the value of a variable or expression to determine where the program will branch to.

A)switch
B)select
C)associative
D)scope
E)None of these

Question 19

Relational operators allow you to ________ numbers.

A)add
B)multiply
C)compare
D)average
E)None of these

Question 20

What is the output of the following code segment?

A)This is true!
B)This is false!
C)This is true! This is false!
D)This is true! This is all folks!
E)None of these

Question 21

This operator is known as the logical OR operator.

A)--
B)//
C)#
D)||
E)None of these

Question 22

When a program lets the user know that an invalid choice has been made, this is known as:

A)input validation
B)output correction
C)compiler criticism
D)output validation
E)None of these

Question 23

What will the following segment of code output if the value 11 is entered at the keyboard?

A)C++ is fun
B)Soccer is fun
C)C++
D)C++fun
E)Soccerfun

Question 24

What will the following program display?

A)0 1 1 0
B)0 0 1 0
C)1 1 0 1
D)1 0 0 1
E)None of these

Question 25

What will the following program segment display?

A)7 15
B)0 0
C)10 10
D)1 1
E)None of these

Question 26

In C++ the = operator indicates:

A)equality
B)assignment
C)subtraction
D)negation
E)None of these

Question 27

Given that, x = 2, y = 1, and z = 0, what will the following cout statement display?

A)answer = 0
B)answer = 1
C)answer = 2
D)None of these

Question 28

Given the following code segment, what is output after "result = "?

A)0
B)1
C)2
D)3
E)None of these

Question 29

What is the value of the following expression?

A)true
B)false
C)-1
D)+1

Question 30

What is the value of the following expression?

A)true
B)false
C)-1
D)+1

Question 31

What is the value of the following expression?

A)true
B)false
C)-1
D)+1

Question 32

This operator performs a logical NOT operation.

A)--
B)!
C)<>
D)><
E)None of these

Question 33

If you intend to place a block of statements within an if statement, you must place these around the block.

A)Parentheses ( )
B)Square brackets [ ]
C)Angle brackets < >
D)Curly braces { }
E)None of these

Question 34

The ________ of a variable is limited to the block in which it is declared.

A)precedence
B)associativity
C)scope
D)branching ability
E)None of these

Question 35

What is the value of donuts after the following code executes?

A)12
B)10
C)0
D)2

Question 36

What is the value of the following expression?

A)true
B)false
C)-1
D)+1

Question 37

The default section of a switch statement performs a similar task as the ________ portion of an if/else if statement.

A)conditional
B)break
C)trailing else
D)All of these
E)None of these

Question 38

Which statement allows you to properly check the char variable code to determine whether it is equal to a "C" and then output "This is a check" and then advance to a new line?

A)
B)
C)
D)

Question 39

These operators connect two or more relational expressions into one, or reverse the logic of an expression.

A)relational
B)logical
C)irrational
D)negation
E)None of these

Question 40

What is the value of donuts after the following code executes?

A)12
B)10
C)0
D)1

Question 41

What will be the value of result after the following code has been executed?

A)10
B)120
C)20
D)This code will not compile.

Question 42

If the sub-expression on the left side of the || operator is true, the expression on the right side will not be checked.

Question 43

Both of the following if statements perform the same operation.
if (sales > 10000)
commissionRate = 0.15;
if (sales > 10000)commissionRate = 0.15;

Question 44

You should be careful when using the equality operator to compare floating point values because of potential round-off errors.

Question 45

The following code correctly determines whether x contains a value in the range of 0 through 100.
if (x >= 0 && <= 100)

Question 46

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 47

The default section is required in a switch statement.

Question 48

Which value can be entered to cause the following code segment to display the message:

A)100
B)10
C)99
D)0
E)All of these

Question 49

An expression that has any value other than 0 is considered true by an if statement.

Question 50

What is the output of the following code?

A)98
B)99
C)0
D)1

Question 51

As a rule of style, when writing an if statement you should indent the conditionally-executed statements.

Question 52

Which line in the following program will cause a compiler error?

A)6
B)8
C)10
D)9

Question 53

If the sub-expression on the left side of an && operator is false, the expression on the right side will not be checked.