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Exam 4: Control Structures I Selection

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Question 21

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The expression in an if statement is sometimes called a(n) ____.

A) selection statement
B) action statement
C) decision maker
D) action maker

E) B) and C)
F) None of the above

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Question 22

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In C++, both ! and != are relational operators.

A) True
B) False

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Question 23

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

Once an input stream enters a(n) ____________________ state, all subsequent input statements associated with that input stream are ignored, and the computer continues to execute the program, which produces erroneous results.

What is the output of the following code? char lastInitial = 'S'; Switch (lastInitial) { case 'A': $\quad$ cout << "section 1" << endl; $\quad$ break; case 'B': $\quad$ cout << "section 2" << endl; $\quad$ break; case 'C': $\quad$ cout << "section 3" << endl; $\quad$ break; case 'D': $\quad$ cout << "section 4" << endl; $\quad$ break; default: $\quad$ cout << "section 5" << endl; }

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

Consider the following statements. int score; string grade; if (score >= 65) grade = "pass"; else grade = "fail"; If score is equal to 75, the value of grade is "____________________".

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;.

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

Suppose x is 5 and y is 7. Choose the value of the following expression: (x != 7) && (x <= y)

If the expression in an assert statement evaluates to true, the program terminates.

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

The conditional operator ?: takes ____ arguments.

The term ____________________ describes a process in which the computer evaluates a logical expression from left to right and stops as soon as the value of the expression is known.

The result of a logical expression cannot be assigned to an int variable, but it can be assigned to a bool variable.

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

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

A compound statement functions as if it was a single statement.

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

The value of the expression 6 < 5 || 'g' > 'a' && 7 < 4 is ____________________.