Deck 4: Decision Structures and Boolean Logic

Question 1

The ________ operator could be used,in some situations,to simplify nested selection structures.

A)AND
B)NOT
C)OR
D)All of the above
E)None of the above

Answer 1

A

Question 2

A condition is a _____________ expression.

A)Boolean
B)Relational
C)Logical
D)Mathematical
E)None of the above

Answer 2

A

Question 3

If the expression is false,the ____________ operator will return true.

A)AND
B)NOT
C)OR
D)All of the above
E)None of the above

Answer 3

B

Question 4

What two logical operators perform short-circuit evaluation?

A)NOT and OR
B)AND and OR
C)AND and NOT
D)All of the Above
E)None of the Above

Question 5

Which structure is a logical design that controls the order in which a set of statements executes?

A)Control
B)Sequence
C)Module
D)Terminal
E)None of the above

Question 6

What type of operator can be used to determine whether a specific relationship exists between two values?

A)Boolean
B)Relational
C)Logical
D)Mathematical
E)None of the above

Question 7

What type of operators are the following?
> < >= <= == !=

A)Boolean
B)Relational
C)Logical
D)Mathematical
E)None of the above

Question 8

Which operator is used to determine that the operands are not exactly of the same value?

A)=
B)!
C)=!
D)==
E)None of the above

Question 9

Which operator would make the following expression true?
False _______ True

A)AND
B)NOT
C)OR
D)All of the above
E)None of the above

Question 10

In many languages the case structure is called a ____________ statement.

A)Branch
B)Jump
C)Selective
D)Switch
E)All of the above

Question 11

The _________ operator is a unary operator as it works with only one operand.

A)AND
B)NOT
C)OR
D)All of the above
E)None of the above

Question 12

It is possible to write a complete program using only a decision structure.

Question 13

Which of the following operators reverses the logic of its operand?

A)NOT
B)AND
C)OR
D)All of the above
E)None of the above

Question 14

Which operator would make the following expression false?
True _______ False

A)AND
B)NOT
C)OR
D)All of the above
E)None of the above

Question 15

Which operator is best to determine whether x contains a value in the range of 10 through 57?

A)AND
B)NOT
C)OR
D)==
E)None of the above

Question 16

Consider the following statement:
A store is giving a discount of 30% for all purchases of over $100.
Which of the following is not the appropriate structure to use to program the statement?

A)Control
B)Decision
C)Selection
D)Sequence
E)None of the above

Question 17

The _______ symbol indicates that some condition must be tested in a flowchart.

A)Rectangle
B)Oval
C)Parallelogram
D)Square
E)Diamond

Question 18

A case structure is a ___________ alternative decision structure.

A)Single
B)Dual
C)Multiple
D)Single or dual
E)All of the above

Question 19

A nested decision structure can be used to test more than one condition.

Question 20

Which of the following is a logical operator?

A)AND
B)NOT
C)OR
D)All of the above
E)None of the above

Question 21

In an expression with an OR operator,it does not matter which sub expression is true for the compound expression to be true.

Question 22

The expression with an AND operator ___________ when the expression on its left is false and so it does not evaluate the expression on its right.

Question 23

Decision structures are also known as selection structures.

Question 24

The _________________ decision structure provides only one alternative path of execution.

Question 25

A ____________ expression evaluates as either true or false.

Question 26

The first line of the case structure starts with the word CASE followed by the test expression.

Question 27

An If statement will produce unpredictable results if the programmer does not use proper indentations in pseudocode.

Question 28

When a program performs actions only under certain conditions,it is using a _________ structure.

Question 29

The value of the ____________ is compared with the values that follow each of the Case statements when a Select Case statement executes.

Question 30

Pseudocode could be logically incorrect if not properly indented.

Question 31

A nested decision structure can achieve the same logic as a case structure.

Question 32

The ____________ operator is used to determine whether the operands are exactly the same as each other.

Question 33

In an If-Then-Else statement,the Else clause marks the beginning of the statements to be executed when the Boolean expression is _______________.

Question 34

The _________ symbol is used to represent a selection structure in flowcharting.

Question 35

The __________ operator requires both sub expressions to be true for the compound expression to be true.

Question 36

The short-circuit evaluation is performed with expressions containing any logical operators.

Question 37

The If-Then-Else statement can be used to simplify a complex nested decision structure.

Question 38

Although the sequence structure is heavily used in programming,it cannot handle every type of task.

Question 39

In a _________________ decision structure,one path is taken if a condition is true and the other path is taken if the condition is false.

Question 40

The If-Then-Else statement should be used to write a single alternative decision structure.

Question 41

The statement(s)that immediately follow the __________ statement is executed if the test expression in the case structure does not match any case values.

Question 42

Boolean variables are commonly used as __________,which indicate whether a specific condition exits.

Question 43

The ____________ statement is commonly used in programming languages for case structure.

Question 44

The _____ operator is best to determine whether a number is outside a range.