Deck 5: Repetition

Question 1

A loop iteration is also called a pass through the loop.

Answer 1

True

Question 2

Not all loops require a condition that must be evaluated.

Answer 2

False

Question 3

Valid loop conditions are identical to those used in selection statements.

Answer 3

True

Question 4

In every loop there must be a statement within the repeating section of code that alters the condition so that it eventually becomes false.

Question 5

A pretest loop is also called an exit-controlled loop.

Question 6

A posttest loop is also called an entranced-controlled loop.

Question 7

The switch statement is a general repetition statement that can be used in a variety of programming situations.

Question 8

The general form of the while statement is:
statement;
while (expression);

Question 9

The transfer of control back to the start of a while statement to reevaluate the expression is known as a program loop.

Question 10

Symbolic constants can be extremely useful in constructing loops because they indicate what the number in the tested condition represents.

Question 11

Loops are rarely used for the computation of sums and averages of lists of numeric data.

Question 12

An average is computed by dividing the final total or accumulated value by the number of items that were added.

Question 13

Care must be taken when choosing sentinel values.

Question 14

If we were constructing a program that accepts student grades, a good sentinel value would be 0.

Question 15

In C, EOF stands for End Of Format.

Question 16

The actual value of EOF is compiler-dependent, but it is always assigned a code that is not used by any other character.

Question 17

The stdio.h file contains the definition of EOF.

Question 18

A break statement forces an immediate break, or exit, from switch and while statements only.

Question 19

The break statement violates pure structured programming principles because it provides a second, nonstandard exit from a loop.

Question 20

When a continue statement is encountered in a loop, the next iteration of the loop begins immediately.

Question 21

In many situations, especially those that use a counter-controlled loop, the for statement format is easier to use than its while equivalent.

Question 22

The construction for ( ; count <= 20;) is not valid.

Question 23

In C, lists where commas are required to separate individual expressions in the list, are referred to as comma-separated lists.

Question 24

Nested loops have a loop contained within another loop.

Question 25

The first loop of a nested loop is called the inner loop.

Question 26

The input data validation application is ideally suited for a pretest loop.

Question 27

A section of code that is repeated is referred to as a ____.

A)condition
B)selection
C)repetition
D)loop

Question 28

Once a repetition statement is chosen, the other ____ elements of a loop are generally controlled by a single loop-control variable.

A)two
B)three
C)four
D)five

Question 29

In a(n) ____ loop the condition is tested at the end of the repeating section of code.

A)pretest
B)posttest
C)fixed-count
D)condition-controlled

Question 30

In a(n) ____ loop the condition the tested condition does not depend on a count being achieved, but rather on a specific value being encountered.

A)pretest
B)posttest
C)fixed-count
D)condition-controlled

Question 31

A(n) ____ is a condition-controlled loop where one specific value is required to terminate the loop.

A)input-validation
B)sentinel-controlled
C)condition-controlled
D)counter-controlled

Question 32

A(n) ____ loop is a condition-controlled loop that terminates when a value within a valid range is entered.

A)input-validation
B)sentinel-controlled
C)condition-controlled
D)counter-controlled

Question 33

The ____ statement literally loops back on itself to recheck the expression until it evaluates to 0 (becomes false).

A)for
B)switch
C)do-while
D)while

Question 34

In the following statements, the printf statement will be executed ____ times.
Count = 10;
While (count <= 10)
Printf("%d ",count);

A)0
B)1
C)10
D)an infinite number of

Question 35

The output of the following code is ____.
Count = 1; /* initialize count */
While (count <= 10)
{
Printf("%d ",count);
Count++; /* increment count */
}

A)1 1 1 1 1 1 1 1 ...
B)1 2 3 4 5 6 7 8 9
C)1 2 3 4 5 6 7 8 9 10
D)1 2 3 4 5 6 7 8 9 10 11

Question 36

total = total + num; is equivalent to ____.

A)total += num;
B)total =+ num;
C)total ++ num;
D)total +=+ num;

Question 37

____ is an accumulating statement.

A)total += num;
B)total++;
C)++total;
D)total* = num;

Question 38

Before accumulating values, the accumulator variable should be initialized to ____.

A)-1
B)0
C)1
D)NULL

Question 39

In Unix operating systems, the EOF mark is generated whenever the ____ keys are pressed simultaneously.

A)Ctrl and D
B)Ctrl and E
C)Ctrl and F
D)Ctrl and Z

Question 40

In IBM-compatible computers, the EOF mark is generated whenever the ____ keys are pressed simultaneously.

A)Ctrl and D
B)Ctrl and E
C)Ctrl and F
D)Ctrl and Z

Question 41

The ____ statement is similar to the break statement but applies only to loops created with while, do-while, and for statements.

A)stop
B)loop
C)exit
D)continue

Question 42

The statement ____ is a null statement.

A)NULL
B)NULL;
C)break;
D);

Question 43

The need to initialize variables or make some other evaluations prior to entering a repetition loop is so common that the ____ statement allows all the initializing statements to be grouped together as the first set of items within the statement's parentheses.

A)for
B)while
C)do-while
D)switch

Question 44

The ____ semicolons must always be present within the for statement's parentheses.

A)two
B)three
C)four
D)five

Question 45

Omitting the ____ expression in a for statement results in an infinite loop.

A)initializing
B)altering
C)tested
D)break

Question 46

The second loop of a nested loop is called the ____ loop.

A) inner
B) outer
C) slave
D) conditioned

Question 47

The ____ statement always creates a posttest loop.

A) while
B) do-while
C) for
D) repeat-until