Module 3 (Prelim)

Question 1

A structure that allows repeated execution of a block of statements

Answer 1

Loop

Question 2

A block of statements that are executed repeatedly

Answer 2

Loop body

Question 3

One execution of any loop

Answer 3

Iteration

Question 4

Three types of loops

Answer 4

while
for
do…while

Question 5

The loop-controlling Boolean expression is the first statement

Answer 5

while

Question 6

A concise format in which to execute loops

Answer 6

for

Question 7

The loop-controlling Boolean expression is the last statement

Answer 7

do…while

Question 8

Executes a body of statements continually. As long as the Boolean expression that controls entry into the loop continues to be true

Answer 8

while loop

Question 9

while loop syntax:

Answer 9

while (expression)
….statement

Question 10

Performs a task a predetermined number of times

Answer 10

Definite loop or counter-controlled loop

Question 11

Definite loop or counter-controlled loop is also called _________

Answer 11

counted loop

Question 12

Sentinel variable is tested in the condition. Loop ends when sentinel is encountered

Answer 12

Indefinite or Sentinel-controlled while loops

Question 13

A loop that never ends. Can result from a mistake in the while loop

Answer 13

Infinite loop

Question 14

Suspect an infinite loop when:

Answer 14

-The same output is displayed repeatedly
-The screen remains idle for an extended period of time

Question 15

To exit an infinite loop:

Answer 15

• press and hold Ctrl + C
• Break

Question 16

is an operator used for one value

Answer 16

unary operators

Question 17

• The result is calculated and stored
• Then the variable is used

Answer 17

Prefix ++

Question 18

• The variable is used
• Then the result is calculated and stored

Answer 18

Postfix ++

Question 19

Prefix and postfix increment operators

Answer 19

++someValue and someValue++

Question 20

Prefix and postfix decrement operators

Answer 20

–someValue and someValue–

Question 21

The expression (x++) simply means______

A) add 1 to x and return the old value (Postfix increment)
B) add 1 to x and return the new value (Prefix increment)
C) take 1 from x and return the old value (Postfix decrement)
D) take 1 from x and return the new value (Prefix decrement)

Answer 21

A) add 1 to x and return the old value

Question 22

The expression (++x) simply means______

A) add 1 to x and return the old value (Postfix increment)
B) add 1 to x and return the new value (Prefix increment)
C) take 1 from x and return the old value (Postfix decrement)
D) take 1 from x and return the new value (Prefix decrement)

Answer 22

B) add 1 to x and return the new value

Question 23

The expression (–x) simply means______

A) add 1 to x and return the old value (Postfix increment)
B) add 1 to x and return the new value (Prefix increment)
C) take 1 from x and return the old value (Postfix decrement)
D) take 1 from x and return the new value (Prefix decrement)

Answer 23

D) take 1 from x and return the new value

Question 24

The expression (x–) simply means______

A) add 1 to x and return the old value (Postfix increment)
B) add 1 to x and return the new value (Prefix increment)
C) take 1 from x and return the old value (Postfix decrement)
D) take 1 from x and return the new value (Prefix decrement)

Answer 24

C) take 1 from x and return the old value

Question 25

Used when a definite number of loop iterations is required

Answer 25

for Loop

Question 26

for Loop syntax:

Answer 26

for (initial statement; loop condition; update statement) statement

Question 27

The initial statement, loop condition, and update statement are called ________

Answer 27

for loop control statements

Question 28

Other uses for the three sections of a for loop:

Answer 28

- Initialization of more than one variable - Performance of more than one test using AND or OR operators - Decrementing or performance of some other task - Altering more than one value

Question 29

You can leave one or more portions of a for loop empty (True or False)

Answer 29

T Two semicolons are still required as placeholders

Question 30

For loop: - To pause a program: (2)

Answer 30

- Use do-nothing loop (ex. for(x = 0; x < 100000; ++x);) - use the built-in sleep() method

Question 31

is a posttest loop

Answer 31

do…while loop

Question 32

The statement executes first, and then the expression is evaluated. As long as expression is true, loop continues. Loop always iterates at least once

Answer 32

do...while Loop

Question 33

do...while Loop: To avoid an infinite loop, body must contain a statement that makes the expression ________

Answer 33

false

Question 34

do...while Loop syntax:

Answer 34

do { statement } while (expression)

Question 35

An inner loop must be entirely contained in an outer loop (True or False)

Answer 35

T

Question 36

______and ______ alter the flow of control

Answer 36

break continue

Question 37

break statement is used for two purposes:

Answer 37

- To exit early from a loop - To skip the remainder of a switch structure

Question 38

break and continue Statements: After ______ executes, the program continues with the first statement after the structure

Answer 38

break

Question 39

continue is used in while, for, and do…while structures (True or False)

Answer 39

T

Question 40

When __________ is executed in a loop, It skips remaining statements and proceeds with the next iteration of the loop

Answer 40

break and continue