Question 1

True

Accepted Answer

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

Question 2

False

Accepted Answer

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

Question 3

False

Accepted Answer

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

Question 4

False

Accepted Answer

In C++, !, &&, and || are called relational operators.

Question 5

False

Accepted Answer

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

Question 6

True

Accepted Answer

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

Question 7

True

Accepted Answer

In C++, && has a higher precedence than ||.

Question 8

True

Accepted Answer

The operators != and == have the same order of precedence.

Question 9

True

Accepted Answer

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

Question 10

False

Accepted Answer

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

Question 11

selection

Accepted Answer

In a ____ control structure, the computer executes particular statements depending on some condition(s).

Question 12

less than or equal to

Accepted Answer

What does <= mean?

Question 13

==

Accepted Answer

Which of the following is a relational operator?

Question 14

!=

Accepted Answer

Which of the following is the not equal to relational operator?

Question 15

true

Accepted Answer

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

Question 16

(x > 0) || ( x <= 0)

Accepted Answer

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

Question 17

!

Accepted Answer

Which of the following operators has the highest precedence?

Question 18

=

Accepted Answer

Which of the following operators has the lowest precedence?

Question 19

10 < x && x < 20

Accepted Answer

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

Question 20

decision maker

Accepted Answer

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

Question 21

35 45 10

Accepted Answer

What is the output of the following C++ code?int x = 35;int y = 45;int z;if (x > y) z = x + y;else z = y - x;cout << x <<   << y <<   << z << endl;

Question 22

nested

Accepted Answer

When one control statement is located within another, it is said to be ____.

Question 23

*

Accepted Answer

What is the output of the following code?if (6 > 8){ cout <<  **  << endl ; cout << **** << endl;}else if (9 == 4) cout << *** << endl;else cout << * << endl;

Question 24

if (x = 5)

Accepted Answer

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

Question 25

silent killer

Accepted Answer

The appearance of = in place of == resembles a(n) ____.

Question 26

2

Accepted Answer

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;.

Question 27

three

Accepted Answer

The conditional operator ?: takes ____ arguments.

Question 28

4

Accepted Answer

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

Question 29

pseudocode

Accepted Answer

To develop a program, you can use an informal mixture of C++ and ordinary language, called ____.

Question 30

section 5

Accepted Answer

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

Question 31

section 1

Accepted Answer

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

Question 32

13

Accepted Answer

What is the output of the following code fragment if the input value is 4?int num;int alpha = 10;cin >> num;switch (num){case 3: alpha++; break;case 4: case 6: alpha = alpha + 3;case 8: alpha = alpha + 4; break;default: alpha = alpha + 5;}cout << alpha << endl;

Question 33

2

Accepted Answer

What is the output of the following C++ code?int x = 55;int y = 5;switch (x % 7){case 0:case 1:  y++;case 2:case 3:  y = y + 2;case 4:  break;case 5:case 6:  y = y - 3;}cout << y << endl;

Question 34

#include <cassert>

Accepted Answer

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

Question 35

#define NDEBUG

Accepted Answer

You can disable assert statements by using which of the following?

Question 36

&&

Accepted Answer

In C++, the logical operator AND is represented by ____________________.

Question 37

true

Accepted Answer

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

Question 38

relational

Accepted Answer

The symbol > is a(n) ____________________ operator.

Question 39

relational

Accepted Answer

A ____________________ operator allows you to make comparisions in a program.

Question 40

!

Accepted Answer

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

Question 41

false

Accepted Answer

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

Question 42

false

Accepted Answer

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

Question 43

associativity

Accepted Answer

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

Question 44

semantic

Accepted Answer

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

Question 45

pass

Accepted Answer

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 ____________________.

Question 46

if

Accepted Answer

Every else must be paired with a(n) ____________________.

Question 47

short circuit evaluation

Accepted Answer

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.

Question 48

fail

Accepted Answer

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.

Question 49

switch

Accepted Answer

A(n) ____________________ structure does not require the evaluation of a logical expression.

Question 50

break

Accepted Answer

To output results correctly, the switch structure must include a(n) ____________________ statement after each cout statement, except the last cout statement.

CS 150 Chapter 4

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