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Exam 4: Making Decisions

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Question 21

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For maximum efficiency, a good rule of thumb in an AND decision is to ____.

A) first ask the question that is more likely to be true
B) first ask the question that is more likely to be false
C) rewrite it as an OR decision and ask the question more likely to be true
D) rewrite it as an OR decision and ask the question more likely to be false

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Question 22

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You can use parentheses to override the default order of operations.

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Question 23

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In a truth table, the expression ____ is true.

For maximum efficiency, a good rule of thumb in an OR decision is to ____.

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

The NOT operator is a unary operator, meaning it takes only one operand.

Most languages allow you to use a variation of the decision structure called the ____ structure when you must nest a series of decisions about a single variable.

When you combine AND and OR operators within the same statement, which takes precedence?

You can perform a ____ by making comparisons using either the lowest or highest value in a range of values.

When you need to satisfy two or more criteria to initiate an event in a program, you must make sure that the second decision is made entirely independently of the first decision.

In a truth table, the expression ____ is false.

The ____________________ clause is the part of the decision that holds the action or actions that execute when the tested condition in the decision is true.

The NOT operator is a ____________________ operator, meaning it takes only one operand.

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

____ evaluation is when each part of an expression that uses an operator is evaluated only as far as necessary to determine whether the entire expression is true or false.

____ are diagrams used in mathematics and logic to help describe the truth of an entire expression based on the truth of its parts.

The ____ clause is the part of the decision that holds the action or actions that execute when the tested condition in the decision is true.

Explain the purpose and use of the AND operator.

Most programming languages allow you to ask two or more questions in a single comparison by using a(n) ____ operator that joins decisions in a single statement.

When would you use a negative comparison?