chapter 5

Question 1

When you use a loop, you can write one set of instructions that operates on multiple, separate sets of data.

Answer 1

true

Question 2

A major advantage of having a computer perform complicated tasks is the ability to repeat them.

Answer 2

true

Question 3

A loop is a structure that branches in two logical paths before continuing.

Answer 3

false

Question 4

To make a while loop execute correctly, a loop control variable must be set to 0 before entering the loop.

Answer 4

false

Question 5

To make a while loop execute correctly, a loop control variable should be tested before entering the loop body.

Answer 5

true

Question 6

To make a while loop execute correctly, the body of the loop must take some action that alters the value of the loop control variable.

Answer 6

true

Question 7

When one loop is nested inside another, the loop that contains the other loop is called the outer loop.

Answer 7

true

Question 8

You need to create nested loops when the values of two or more variables repeat to produce every combination of values.

Answer 8

true

Question 9

The number of times a loop executes always depends on a constant.

Answer 9

false

Question 10

In a loop, neglecting to initialize the loop control variable is a mistake.

Answer 10

true

Question 11

In a loop, neglecting to alter the loop control variable is a mistake.

Answer 11

true

Question 12

In a loop, comparing the loop control variable using >= or <= is a mistake.

Answer 12

false

Question 13

The for statement provides you with three actions in one compact statement: initializing, testing, and altering a loop control variable.

Answer 13

true

Question 14

A for statement body always executes at least one time.

Answer 14

false

Question 15

In most programming languages, you can provide a for loop with any step value.

Answer 15

true

Question 16

In a while loop, the loop body might not execute.

Answer 16

true

Question 17

In a do-while loop, the loop body might not execute.

Answer 17

false

Question 18

The logic expressed by a do-while loop can always be expressed using a sequence and a while loop.

Answer 18

true

Question 19

In a structured loop, the loop-controlling evaluation must provide either the entry to or exit from the repeating structure.

Answer 19

true

Question 20

In a structured loop, the loop-controlling evaluation provides the only entry to or exit from the structure.

Answer 20

true

Question 21

If you need to perform a task, evaluate a condition, and perform an additional task, you cannot use a structured loop.

Answer 21

false

Question 22

An accumulator is a variable that you use to gather or accumulate values.

Answer 22

true

Question 23

An accumulator typically is initialized to 0.

Answer 23

true

Question 24

An accumulator is typically reset to 0 after it is output.

Answer 24

false

Question 25

Selection and loop structures differ in that selection structures only take action when a test condition is true.

Answer 25

false

Question 26

Selection and loop structures are similar in that the tested condition that begins either structure always has two possible outcomes.

Answer 26

true

Question 27

One difference between selection and loop structures is that the structure-controlling evaluation is repeated in a loop structure.

Answer 27

true