Question 1

In any Boolean expression,the two values compared can be either variables or ____.
A) numbers
B) nulls
C) constants
D) trivial expressions

Accepted Answer

The two values compared in any Boolean expression can be either variables or constants. Numbers can be constants in Boolean expressions but not the only option. Nulls and trivial expressions are not valid options.

Question 2

In every programming language,addition has precedence over multiplication in an arithmetic statement.

Accepted Answer

In most programming languages, multiplication has precedence over addition in an arithmetic statement, following the standard order of operations used in mathematics.

Question 3

When you use the OR operator,both of the listed conditions must be met for the resulting
action to take place.

Accepted Answer

When you use the OR operator, only one of the listed conditions needs to be met for the resulting action to take place.

Question 4

A ____ is a displayed statement that advises a user what to do.For example,"Please enter your name."
A) start
B) question
C) prompt
D) query

Accepted Answer

A prompt is a statement or message displayed on a screen that advises or

Question 5

Every decision you make in a computer program involves evaluating a Boolean expression.

Accepted Answer

Boolean expressions are used to determine the truth or falsehood of a condition and are commonly used in programming to make decisions based on certain conditions being met or not. Therefore, every decision made in a computer program involves evaluating a Boolean expression.

Question 6

String value: "BLACK HORSE" is equal to "Black Horse".

Accepted Answer

The string value "BLACK HORSE" is not equal to "Black Horse" because of the case sensitivity in the comparison of the characters.

Question 7

If X > Y is false,which of the following is always true? A) X < Y B) X <= Y C) X = Y D) X >= Y

Accepted Answer

If the statement X > Y is false, it means that X is not greater than Y. This leaves two possibilities: X is less than Y (X < Y) or X is equal to Y (X = Y). Both of these possibilities are covered by the statement X <= Y, making it always true when X > Y is false.

Question 8

A ____ is one that represents only one of two states,true or false.
A) Boolean expression
B) short-circuit evaluation
C) trivial expression
D) truth table

Accepted Answer

A Boolean expression represents only two states, true or false. Short-circuit evaluation refers to the way expressions are evaluated, not to a specific type of expression. Trivial expression is not a commonly used term in computer science. A truth table is a way to show all possible inputs and outputs of a Boolean expression.

Question 9

Boolean (true/false)expressions are named for George Boolean.

Accepted Answer

Boolean expressions are named after George Boole, an English mathematician, not "George Boolean."

Question 10

Most programming languages allow you to combine as many AND and OR operators in an expression as you need.

Accepted Answer

Most programming languages do allow you to combine as many AND and OR operators in an expression as you need, including chaining together multiple operators in the same expression.

Question 11

True/false evaluation is "natural" from a computer's standpoint because computer circuitry consists of two-state on-off switches,often represented by ____.
A) 1 or -1
B) 1 or 0
C) light or dark
D) plus or minus

Accepted Answer

Computer circuitry operates using binary (base 2) numbering system, which only has two possible values - 1 or 0, on or off. Therefore, true/false evaluation in computer programming is based on these two states. Option A, C, and D are not relevant as they don't reflect the binary nature of computer circuitry.

Question 12

A(n)____ is a value on either side of an operator.
A) operator
B) indicator
C) compound condition
D) operand

Accepted Answer

An operand is a value on either side of an operator.

Question 13

Trivial expressions will always evaluate to the same result.

Accepted Answer

Trivial expressions have a fixed value that does not depend on their input or the context in which they are evaluated. Therefore, they will always yield the same result every time they are evaluated.

Question 14

The selection structure where the logic can flow only to one of the two alternatives,never to both is called a(n)____ structure.
A) if-then
B) if-then-else
C) loop
D) while

Accepted Answer

The if-then-else structure allows the logic to flow to one of two alternatives based on a condition, but never both, making it the correct choice.

Question 15

When new programmers perform range checks,they are prone to using logic that includes too many decisions,entailing more work than is necessary.

Accepted Answer

This statement is true as new programmers may not have the experience or training to efficiently perform range checks and may include unnecessary logic in their decision-making process.

Question 16

When you use an AND operator to join multiple Boolean expressions,all the individual expressions must be true for the joint expression to be true.

Accepted Answer

When using the AND operator, all the individual expressions must evaluate to true for the joint expression to be true. If any individual expression evaluates to false, the joint expression will also be false.

Question 17

Comparing two amounts in order to decide if they are not equal to each other is the most confusing of all the comparisons.

Accepted Answer

Comparing two amounts to decide if they are not equal to each other is a simple comparison.

Question 18

The ____ operator evaluates as true when the left operand is less than or equivalent to the right operand. A) >= B) <= C) > D) <

Accepted Answer

The <= operator evaluates as true when the left operand is less than or equivalent to the right operand.

Question 19

There are ____ relational comparison operators supported by all modern programming languages.
A) three
B) four
C) five
D) six

Accepted Answer

Modern programming languages typically support six relational comparison operators: less than (<), greater than (>), less than or equal to (<=), greater than or equal to (>=), equal to (==), and not equal to (!=).

Question 20

Any decision can be made using combinations of just three types of comparisons: _____.
A) equal,more than,and less than
B) equal to,greater than,and less than
C) equal to,more,and less
D) equal,not equal to,and greater than

Accepted Answer

The three types of comparisons are equal to (denoted by "="), greater than (denoted by ">"), and less than (denoted by "<"). Option B correctly lists all three types. Option A incorrectly uses "more than" instead of "greater than" and option C uses "more" instead of "greater than". Option D includes "not equal to" which is not one of the three types listed.

Quiz 3: Making Decisions

In any Boolean expression,the two values compared can be either variables or ____.

In every programming language,addition has precedence over multiplication in an arithmetic statement.

When you use the OR operator,both of the listed conditions must be met for the resulting action to take place.

A ____ is a displayed statement that advises a user what to do.For example,"Please enter your name."

Every decision you make in a computer program involves evaluating a Boolean expression.

String value: "BLACK HORSE" is equal to "Black Horse".

If X > Y is false,which of the following is always true?

A ____ is one that represents only one of two states,true or false.

Boolean (true/false)expressions are named for George Boolean.

Most programming languages allow you to combine as many AND and OR operators in an expression as you need.

True/false evaluation is "natural" from a computer's standpoint because computer circuitry consists of two-state on-off switches,often represented by ____.

A(n) ____ is a value on either side of an operator.

Trivial expressions will always evaluate to the same result.

The selection structure where the logic can flow only to one of the two alternatives,never to both is called a(n) ____ structure.

When new programmers perform range checks,they are prone to using logic that includes too many decisions,entailing more work than is necessary.

When you use an AND operator to join multiple Boolean expressions,all the individual expressions must be true for the joint expression to be true.

Comparing two amounts in order to decide if they are not equal to each other is the most confusing of all the comparisons.

The ____ operator evaluates as true when the left operand is less than or equivalent to the right operand.

There are ____ relational comparison operators supported by all modern programming languages.

Any decision can be made using combinations of just three types of comparisons: _____.