C Control Flow

Question 1

What is the default block in a C switch statement

Answer 1

a case block that is used to catch any input that does not match the case statements

Question 2

C Control Flow: switch

Answer 2

Switch is a control flow statement that enables you to choose one course of action from a set of possible actions, based on the result of an integer expression

Question 3

C Control Flow: do while

Answer 3

do while is a loop that executes a block of statements, then checks a condition and if it is true, the block is repeated, otherwise it will skip to the next statement after the condition

Question 4

What three expressions does a C for loop contain

Answer 4

variable initialization, conditional expression, loop control variable expression

Question 5

What does the break statement do in a C loop

Answer 5

It terminates the loop and program control returns to the next statement following the end of the loop

Question 6

What does the continue statement do in a C loop

Answer 6

forces the next iteration of the loop and passes over any remaining statements within the loop

Question 7

What is the controlling expression in a C switch statement

Answer 7

a constant integer expression followed by the switch keyword and is compared with each of the case labels

Question 8

What is the body of a C switch statement enclosed in

Answer 8

Curly braces

Question 9

C Control Flow: goto

Answer 9

Goto is a control flow statement that directs the flow of execution to a labelled block of code

Question 10

What must the controlling expression be followed by in a C switch statement

Answer 10

A colon :

Question 11

What does the break statement do in a C switch case block

Answer 11

skip over the other statements within that case and continue with whatever statement follows the closing brace

Question 12

What is a continuation condition in C loops

Answer 12

A condition in a loop that is checked before each iteration to see whether the loop should continue

Question 13

When does a C loop terminate

Answer 13

When the control expression evaluates to false

Question 14

C Control Flow: for

Answer 14

For is a loop that executes a block of statements a given number of times

Question 15

What are control expressions in C loops

Answer 15

conditions that control the operation of a loop

Question 16

C Control Flow: if

Answer 16

the if statement is a selection statement that contains a block of code and executes them if the condition is true. if the condition is false, the block of code is not executed

Question 17

C Control Flow: else

Answer 17

the else statement is a selection statement that contains a block of code and executes them if the condition in the corresponding if statement is false. it the condition is true, the else block is not executed

Question 18

C Control Flow: else if

Answer 18

the else if statement is a selection statement that contains a block of code and executes them if the condition is true and the corresponding if statement evaluating a similar condition is false. if the condition is false the block is not executed

Question 19

When is the if block executed

Answer 19

When the condition is true

Question 20

When is the else if block executed

Answer 20

when the condition in the corresponding if statement is false and the condition in the else if statement is true

Question 21

When is the else block executed

Answer 21

when the condition in the corresponding if statement is false

Question 22

How are conditions formed

Answer 22

by using the equality and relational operators to make a boolean expression or by using a boolean value

Question 23

What is a condition in C

Answer 23

a boolean expression used in selection statements and loops

Question 24

What is a loop in C

Answer 24

a block of statements that execute repeatedly while a condition remains true

Question 25

What are infinite loops in C

Answer 25

Loops that never end

Question 26

C Control Flow: while

Answer 26

the while statement is a loop that executes a block of statements repeatedly as long as the condition is true

Question 27

when does a C while loop execute

Answer 27

when the condition is true

Question 28

when does a C while loop not execute

Answer 28

when the condition is false

Question 29

when does a C while loop end its execution

Answer 29

when the condition becomes false

Question 30

when does a C for loop execute

Answer 30

when the condition is true

Question 31

when does a C for loop not execute

Answer 31

when the condition is false

Question 32

when does a C for loop end its execution

Answer 32

when the condition becomes false

Question 33

How long does a C while loop execute

Answer 33

As long as the condition is true

Question 34

How long does a C for loop execute

Answer 34

As long as the condition is true