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Exam 4: Control Structures I Selection

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Question 21

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You can use either a(n) ____ or a ____ to store the value of a logical expression.

A) float, double
B) char, string
C) int, bool
D) float, string

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Question 22

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Which of the following expressions correctly determines that x is greater than 10 and less than 20?

A) 10 < x < 20
B) (10 < x < 20)
C) 10 < x && x < 20
D) 10 < x || x < 20

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Question 23

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Suppose found = true and num = 6.The value of the expression (!found) || (num > 6) is ____________________.

Suppose P and Q are logical expressions.The logical expression P && Q is true if both P and Q are true.

Suppose that x is an int variable.Which of the following expressions always evaluates to true?

The value of the expression 7 + 8 <= 15 is ____________________.

Which of the following operators has the highest precedence?

Suppose x is 5 and y is 7.Choose the value of the following expression:

The operators !, &&, and || are called relational operators.

Which of the following will cause a logical error if you are attempting to compare x to 5?

Putting ____________________ in front of a logical expression reverses the value of that logical expression.

In C++, the operators != and == have the same order of precedence.

A control structure alters the normal sequential flow of execution in a program.

What is the value of x after the following statements execute? int x; X = (5 <= 3 && 'A' < 'F') ? 3 : 4

For a program to use the assert function, it must include which of the following?

What is the output of the following C++ code?

The expression (x >= 0 && x <= 100) evaluates to false if either x < 0 or x >= 100.

Putting a semicolon after the parentheses following the expression in an if statement (that is, before the statement) is a(n) ____________________ error.

Assume you have three int variables: x = 2, y = 6, and z.Choose the value of z in the following expression: z = (y / x > 0) ? x : y;.

The ____________________ of relational and logical operators is said to be from left to right.