Deck 4: Selection Structures

Question 1

Using nested if statements without including braces to indicate the structure constitutes a common programming error.

Answer 1

True

Question 2

In C++, when comparing character data, the char values are coerced to ____ values automatically for the comparison.

A) bool
B) unsigned int
C) long
D) int

Answer 2

D

Question 3

In a relational expression, the value of the expression can be only the integer value 1 or ____.

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

Answer 3

C

Question 4

Before the current ANSI/ISO C++ standard, C++ didn t have a built-in Boolean data type with its two Boolean values, true and false .

Question 5

The case keyword identifies the start of the switch statement.

Question 6

A switch statement can contain any number of case labels in any order.

Question 7

A common problem with the if-else statement is using the assignment operator, = , in place of the relational operator == .

Question 8

Logical operators AND, OR, and NOT are represented by the symbols , ____, and !, respectively.

A) >>
B) ||
C) <<
D) |

Question 9

The switch statement requires you to terminate each case with a break statement.

Question 10

In C++, the postfix and prefix -- operators can be applied to Boolean variables.

Question 11

In C++, strings of characters cannot be compared.

Question 12

In C++, the logical ____ operator is used to change an expression to its opposite state.

A) AND
B) OR
C) NOT
D) REVERSE

Question 13

Using the abs() function requires including the ____ header file.

A) cnumber
B) iostream
C) math
D) cmath

Question 14

The ____ statement in C++ is used to implement a decision structure in its simplest form choosing between two alternatives.

A) for
B) if-else
C) switch-case
D) while

Question 15

The switch statement requires you to list the case values in increasing order.

Question 16

In C++, two string expressions can be compared by using relational operators or the ____ class s comparison methods.

A) string
B) boolean
C) object
D) compareTo

Question 17

The most commonly used ____ in if statements are simple relational expressions.

A) conditions
B) comments
C) evaluations
D) branches

Question 18

A ____ relational expression consists of a relational operator that compares two operands.

A) single
B) complex
C) composed
D) simple

Question 19

The condition used in an if statement can be any valid C++ expression.

Question 20

One or more if-else statements can be included in either part of an if-else statement.

Question 21

The relational operator ____ is used to represent the condition less than.

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

Question 22

A ____ statement is an alternative to the if-else chain for situations when the condition involves comparing an integer expression to a specific value.

A) switch
B) for
C) while
D) do-while

Question 23

A ____ statement is a sequence of single statements contained between braces.

A) compound
B) single
C) simple
D) complex

Question 24

A(n) ____ chain is used in programming applications where one set of instructions must be selected from many possible alternatives.

A) break
B) case
C) for
D) if-else

Question 25

In the switch statement, the ____ keyword identifies values that are compared with the switch expression s value.

A) default
B) break
C) case
D) label

Question 26

A useful modification of the if-else statement involves omitting the ____ part of the statement.

A) expression
B) endif
C) else
D) if

Question 27

Applying a postfix or prefix ++ operator to a variable of type bool sets the Boolean value to ____.

A) false
B) true
C) yes
D) correct

Question 28

With ____, the program includes code to check for improper data before an attempt is made to process it further.

A) defensive programming
B) bug tracking
C) debugging
D) self-cleaning

Question 29

A(n) ____ is any combination of operands and operators that yields a result.

A) command
B) expression
C) sentence
D) statement

Question 30

Like all C++ expressions, relational expressions are evaluated to yield a(n) ____________________ result.

Question 31

When the ____________________ logical operator is used with two simple expressions, the condition is true only if both individual expressions are true by themselves.

Question 32

In C++, relational operators can be used with integer, float, double, and ____________________ operands.

Question 33

In the ASCII character set, lowercase letters are considered ____________________ than uppercase letters.

Question 34

Including one or more if statements inside an existing if statement is called a ____ if statement.

A) composed
B) complex
C) compound
D) nested

Question 35

The area in a program where a variable can be used is formally referred to as the ____ of the variable.

A) spread
B) block
C) reach
D) scope

Question 36

In C++, Boolean variables are declared with the ____ keyword.

A) boolean
B) false
C) bool
D) true

Question 37

The expression in the switch statement must evaluate to a(n) ____ result or a compilation error results.

A) character
B) boolean
C) integer
D) long

Question 38

When writing a switch statement, you can use multiple ____ values to refer to the same set of statements.

A) boolean
B) default
C) break
D) case

Question 39

Checking user input data for erroneous or unreasonable data is referred to as ____.

A) relational data validation
B) arithmetic data validation
C) output data validation
D) input data validation

Question 40

The ____ statement identifies the end of a particular case and causes an immediate exit from the switch statement.

A) default
B) break
C) stop
D) exit

Question 41

In the switch statement, the ____________________ keyword identifies values that are compared with the switch expression s value.

Question 42

If ____________________ statements are omitted in a switch statement, all cases following the matching case value, including the default case, are executed.

Question 43

An if-else statement without an else part is called a(n) ____________________ if statement.

Question 44

The if-else statement is written: if (expression) statement1; else statement2; . If the value of expression is non-zero, ____________________ will be executed.

Question 45

The technique of ____________________ programming includes code to check for improper input data.

Question 46

Including one or more if statements inside an existing if statement is called a(n) ____________________ if statement.

Question 47

Any variable declared within a block of statements has meaning only between its ____________________ and the closing braces defining the block.

Question 48

Because of the way computers store single-precision and double-precision numbers, you should avoid testing for equality of single-precision and double-precision values and variables by using the relational operator ____________________.

Question 49

A(n) ____________________ statement is a sequence of single statements between braces.

Question 50

The ____________________ keyword is optional in a switch statement.

Question 51

Because the NOT operator is used with only one expression, it is a(n) ____________________ operator.