Deck 5: Looping

Question 1

A for loop is considered a(n)_ loop.

A)infinite
B)pretest
C)sentinel controlled
D)multi test
E)post test

Answer 1

B

Question 2

The ++ operator

A)adds one to the value of its operand.
B)can operate in prefix or postfix mode.
C)is a unary operator.
D)All of the above.
E)Both B and C, but not A.

Answer 2

D

Question 3

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

A)update.
B)increment.
C)repeat.
D)quit.
E)validate.

Answer 3

A

Question 4

A sentinel is a special value that

A)marks the end of a list of values.
B)must be Boolean.
C)is used for data validation.
D)must be a negative number.
E)is all of the above.

Question 5

To use files in a C++ program you must include the header file.

A)fstream
B)iostream
C)file
D)Both A and B are needed.
E)Both B and C are needed.

Question 6

To a value means to increase it.

A)add up
B)accumulate
C)increment
D)total
E)decrement

Question 7

The statements in the body of a do-while loop are executed

A)only if the test condition is initially true.
B)forever until the user hits the break key.
C)at least once.
D)until the test condition becomes true.
E)until an exit statement is encountered.

Question 8

The while loop is a(n)loop, whereas the do-while loop is a(n)loop.

A)simple, complex
B)finite, infinite
C)post test, pretest
D)pretest, post test
E)infinite, finite

Question 9

In a for statement, the expression is executed only once.

A)validate
B)initialization
C)test
D)update
E)repeat

Question 10

The ideal type of loop to use for repeating a menu is a(n)_ loop.

A)for
B)do-while
C)nested
D)infinite
E)sentinel controlled

Question 11

In order for a C++ program to read data from a file,

A)the program must open the file.
B)the file must already exist.
C)the program must define a file stream object that can "point to" (i.e., reference)the file.
D)All of the above are required..

Question 12

A(n)is a variable that controls the number of times a loop iterates.

A)total
B)accumulator
C)sentinel
D)counter
E)loop control variable

Question 13

A variable that keeps a running total of data values is called a(n)

A)sum.
B)loop control variable.
C)total.
D)accumulator.
E)counter.

Question 14

The ideal type of loop to use if you want a user to enter exactly 20 values is a(n)loop.

A)sentinel controlled
B)do-while
C)infinite
D)nested
E)for

Question 15

For data validation, it is best to use a(n)

A)switch statement.
B)if statement.
C)for loop.
D)nested loop.
E)while loop.

Question 16

The statement causes a loop to terminate early.

A)stop
B)break
C)continue
D)terminate
E)quit

Question 17

The while loop has two important parts: a condition that is tested and a statement or block of statements that is executed

A)as long as the condition is true.
B)until the condition becomes true.
C)at least once.
D)exactly once.
E)Both A and C are true, but B and D are not.

Question 18

The while loop has two important parts: a condition that is tested and a statement or block of statements that is

A)done once if the condition is true.
B)repeated as long as the condition is true.
C)always skipped.
D)repeated until the condition becomes true.
E)always done at least once, then repeated if the condition is true.

Question 19

A(n)is a special value that marks the end of a list of values.

A)counter
B)loop control variable
C)accumulator
D)sentinel
E)total

Question 20

are C++ operators that change their operands by one.
A)⁺⁺ and ^--

A)binary and unary
B)⁺ and ^-
B)conditional and relational
C)arithmetic and relational

Question 21

The do- while loop is a(n)loop, whereas the while loop is a(n)loop.

A)post test, pretest
B)infinite, finite
C)simple, complex
D)pretest, post test
E)finite, infinite

Question 22

If a while loop has no braces around the body of the loop

A)the loop body contains just one statement.
B)there is no loop body.
C)the loop body ends when the endwhile statement is encountered.
D)the program will not compile.
E)the program will compile, but not run.

Question 23

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

Question 24

A(n)is a variable that is regularly incremented or decremented each time a loop iterates.

A)accumulator
B)total
C)sentinel
D)loop control variable
E)counter

Question 25

You may define a(n)in the initialization expression of a for loop.

A)variable
B)constant
C)new data type
D)operator
E)new keyword

Question 26

To decrement a number means to increase its value.

Question 27

The -- operator

A)subtracts one from the value of its operand.
B)must have an lvalue, such as a variable, as its operand.
C)can be used in either prefix or postfix mode.
D)is a unary operator.
E)All of the above are true.

Question 28

A while loop is somewhat limited because the counter can only be incremented or decremented by one each time through the loop.

Question 29

You can nest a for loop inside another for loop, but cannot nest a while loop inside another while loop or a do-while loop inside another do-while loop.

Question 30

When a loop is nested inside another loop, the inner loop goes through all its iterations for each iteration of the outer loop.

Question 31

When a loop is nested inside another loop, the outer loop goes through all its iterations for each iteration of the inner loop.

Question 32

The statements in the body of a do-while loop are executed

A)forever until the user hits the break key.
B)exactly once.
C)until the test condition becomes true.
D)at least once.
E)only if the test condition is initially true.

Question 33

The block of code in the body of a while statement can contain an unlimited number of statements, provided they are enclosed in a set of braces.

Question 34

To use an output file in a C++ program you must

A)make sure the file already exists.
B)create a file stream object that will "point to" (i.e. reference)the file.
C)open the file.
D)do all of the above.
E)do B and C, but not A.

Question 35

To use files in a C++ program you must include the header file.

A)file
B)iostream
C)fstream
D)Both A and B.
E)Both B and C.

Question 36

A while loop is somewhat limited, because the counter can only count up, not down.

Question 37

A while loop may have a semicolon after the test expression and before the body of the loop, but it is not required.

Question 38

If nothing within a while loop ever causes the condition to become false, a(n)may occur.

A)infinite loop
B)null value
C)compiler error
D)unexpected exit
E)system crash