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Exam 4: Decision Structures and Boolean Logic

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Question 1

Multiple Choice

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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

F) D) and E)
G) B) and E)

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Question 2

True/False

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

A) True
B) False

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False

Question 3

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

A case structure is a ___________ alternative decision structure.

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

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

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

Which of the following is a logical operator?

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

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

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

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

A ____________ expression evaluates as either true or false.

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.

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

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?

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

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

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

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