CS-1143 Chapter 5

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What will the following loop display? int x = 0; while (x < 5){ cout << x << endl; x++; }

0 1 2 3 4

How many times will the following loop display "Hello"? for (int i = 0; i < 20; i++); cout << "Hello!" << endl;

1

What is the output of the following code segment? n = 1;while (n != 5) cout << n << ' '; n++;

1 1 1 1 1 1 1 1 1......

What will the following code display? int x = 0; for (int count = 0; count <= 5; count++){ x += count; } cout << x << endl;

15

How many times will the following loop display "Hello"? for (int i = 0; i < 20; i++) cout << "Hello!" << endl;

20

How many times will the following loop display "Hello"? for (int i = 20; i > 0; i--) cout << "Hello!" << endl;

20

What is the output of the following code segment? n = 1; while (n <= 5){ cout << n << ' '; n++; }

1 2 3 4 5

How many times will the following loop display "Hello"? for (int i = 1; i < 20; i++) cout << "Hello!" << endl;

19

Which of these are posttest loops?

do / while loop

A loop that has no way of stopping is a / an

infinite loop

A for statement contains three expressions: initialization, test, and:

update

How many times will the following loop display "Hello"? for (int i = 0; i <= 20; i++) cout << "Hello!" << endl;

21

What will the following code display? int x = 0; for (int count = 1; count <= 10; count+=2){ x += count; } cout << x << endl;

25

What will the following code display? int number = 42; cout << number++ << endl;

42

What will the following code display? int number = 42; cout << ++number << endl;

43

What will the following code display? int x = 0, count = 0; for (count = 0; count < 5 ; count++); { x += count; } cout << x << endl;

5

The body of a do / while loop will be executed zero or more times.

False

The body of a for loop will be executed at least once.

False

The body of a while loop will be executed at least once.

False

You may nest while and do-while loops, but you may not nest for loops.

False

You may not use the break statement in a nested loop.

False

A do / while loop's body can contain multiple statements, as long as they are enclosed in braces.

True

A for loop's body can contain multiple statements, as long as they are enclosed in braces.

True

A while loop's body can contain multiple statements, as long as they are enclosed in braces.

True

An initialization expression may be omitted from the for loop if no initialization is required.

True

The body of a do / while loop will be executed one or more times.

True

The body of a for loop will be executed zero or more times.

True

The body of a while loop will be executed zero or more times.

True

The scope of a variable declared in a for loop's initialization expression is limited to the body of the loop.

True

When a continue statement is encountered in an if statement, control is transferred to

continue does not have any effect on if statements

while ( true ){ . . . } is one way to deliberately write a / an

infinite loop

A loop in which the body is executed at least once is a / an

post-test loop

A loop in which the test expression is evaluated after each repetition is a / an

post-test loop

The do / while loop is an example of a / an

post-test loop

A loop in which the body is executed zero or more times is a / an

pre-test loop

A loop in which the text expression is evaluated before each repetition is a / an

pre-test loop

The while loop is an example of a / an

pre-test loop

When a continue statement is encountered in a do / while loop, control is transferred to

the loop condition

When a continue statement is encountered in a while loop, control is transferred to

the loop condition

When a continue statement is encountered in a for loop, control is transferred to

the loop update block

Question text When a break statement is encountered in a do / while loop, control is transferred to

the statement following the end of the do / while loop

When a break statement is encountered in a for loop, control is transferred to

the statement following the end of the for loop

When a break statement is encountered in a while loop, control is transferred to

the statement following the end of the while loop.

The update expression of a for loop can contain more than one statement, e.g. counter++, total+= sales.

true

Which of these are pretest loops? Choose all that apply.

while for


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