C++ Selection

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

• True

• False

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

• True

• False

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

(x != 7) && (x <= y)

• true

• false

• 0

• null

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

• 10 < =x < =20

• 10 < x < 20

• x > 10 && x< 20

• x > 10|| x < 20

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;

• 35 45 80

• 35 45 10

• 35 45 –10

• 35 45 0

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

• if (x = 5)

• if (x == 5)

• if (x <= 5)

• if (x >= 5)

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

• compound

• blocked

• nested

• closed

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

• !

• !=

• ||

• &&

Which of the following is a relational operator?

• =

• ==

• !

• &&

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

• sequence

• selection

• repetition

• module