Chapter 4 Multiple choice questions

Question 1

A ______-controlled loop uses a true/false condition to control the number of times that it repeats.

a) Boolean
b) condition
c) decision
d) count

Answer 1

A condition-controlled loop uses a true/false condition. (while loop)

Question 2

A ______-controlled loop repeats a specific number of times.

a) Boolean
b) condition
c) decision
d) count

Answer 2

A count-controlled loop uses a specific number. (for loop)

Question 3

Each repetition of a loop is known as a(n) ______.

a) cycle
b) revolution
c) orbit
d) iteration

Answer 3

Each repetition of a loop is known as an iteration.

Question 4

The while loop is a ______ type of loop.

a) pretest
b) no-test
c) prequalified
d) post-iterative

Answer 4

The while loop is a pretest type of loop.

Question 5

A(n) ______ loop has no way of ending and repeats until the program is interrupted.

a) indeterminate
b) interminable
c) infinite
d) timeless

Answer 5

An infinite loop.

Question 6

The -= operator is an example of a(n) ______ operator.

a) relational
b) augmented assignment
c) complex assignment
d) reverse assignment

Answer 6

-= is an augmented assignment operator.

Question 7

A(n) ______ variable keeps a running total.

a) sentinel
b) sum
c) total
d) accumulator

Answer 7

An accumulator variable keeps a running total.

Question 8

A(n) ______ is a special value that signals when there are no more items from a list of items to be processed. This value cannot be mistaken as an item from the list.

a) sentinel
b) flag
c) signal
d) accumulator

Answer 8

A sentinel is a special value that signals when there are no more items to be processed.

Question 9

GIGO stands for ______.

a) great input, great output
b) garbage in, garbage out
c) GIGahertz Output
d) GIGabyte Operation

Answer 9

Garbage in, garbage out.

Question 10

The integrity of a program’s output is only as good as the integrity of the program’s ______.

a) compiler
b) programming language
c) input
d) debugger

Answer 10

The integrity of a program’s output is only as good as the integrity of the program’s input.

Question 11

The input operation that appears just before a validation loop is known as the ______.

a) prevalidation read
b) primordial read
c) initialization read
d) priming read

Answer 11

Priming read

Question 12

Validation loops are known as ______.

a) error traps
b) doomsday loops
c) error avoidance loops
d) defensive loops

Answer 12

Validation loops are known as error traps.

Question 13

True or False:

A condition-controlled loop always repeats a specific number of times.

Answer 13

False, a condition-controlled loop is controlled by conditions.

Question 14

True or False:

The while loop is a preset loop.

Answer 14

True, a while loop is a preset.

Question 15

True or False:

The following statement subtracts 1 from x: x = x -1

Answer 15

True, and it irks mathematicians to no end.

Question 16

True or False:

It is not necessary to initialize accumulator variables.

Answer 16

False, it is necessary to initialize accumulator variables.

Question 17

True or False:

In a nested loop, the inner loop goes through all of its iterations for every single iteration of the outer loop-

Answer 17

True, the inner loop goes through all of its iterations for every outer iteration.

Question 18

True or False:

To calculate the total number of iterations of a nested loop, add the number of iterations of all the loops.

Answer 18

False, you need to multiply the number of iterations of all the loops.

Question 19

True or False:

The process of input validation works as follows: when the user of a program enters invalid data, the program should ask the user “Are you sure you meant to enter that?”. If the user answers “yes,” the program should accept the data.

Answer 19

False, an error message should be displayed and the user should have to enter valid data.