Chapter 3

Question 1

define boolean expression

Answer 1

an expression that evaluates to a boolean value: true or false.

Question 2

define boolean expression

Answer 2

an expression that evaluates to a boolean value: true or false.

Question 3

What is the operator for less than?

Question 4

What is the operator for less than or equal to?

Answer 4

<=

Question 5

What is the operator for greater than?

Answer 5

>

Question 6

What is the operator for greater than or equal to?

Answer 6

> =

Question 7

which is correct => or >= ?

Answer 7

> =

Question 8

what is the operator for equal to?

Answer 8

==

Question 9

what is the operator for not equal to?

Answer 9

!=

Question 10

Which is correct != or =! ?

Answer 10

!=

Question 11

what is the bool data type used for?

Answer 11

it is used for declaring boolean variables

Question 12

____ and ___ are boolean literals

Answer 12

true and false

Question 13

____ statements executes an action if and only if the condition is true

Answer 13

if

Question 14

____ statements executes an action if and only if the condition is true

Answer 14

if

Question 15

what is the syntax for an if-else statement?

Answer 15

if (boolean-expression)
{ 
statement(s)-for-the-true-case;
}
else
{ 
statement(s)-for-the-false-case;
}

Question 16

What is the operator for less than or equal to?

Answer 16

<=

Question 17

what function can you use to generate a random integerr?

Answer 17

rand( )

Question 18

What is the operator for greater than or equal to?

Answer 18

> =

Question 19

which is correct => or >= ?

Answer 19

> =

Question 20

what is the operator for equal to?

Answer 20

==

Question 21

what is the operator for not equal to?

Answer 21

!=

Question 22

Which is correct != or =! ?

Answer 22

!=

Question 23

what is the bool data type used for?

Answer 23

it is used for declaring boolean variables

Question 24

____ and ___ are boolean literals

Answer 24

true and false

Question 25

what happens if you assign a number to bool?

Answer 25

any non zero digit reads true and 0 reads false

Question 26

____ statements executes an action if and only if the condition is true

Answer 26

if

Question 27

what is the syntax for a if statement?

Answer 27

if (boolean-expression) { statement(s); }

Question 28

what is the syntax for an if-else statement?

Answer 28

``` if (boolean-expression) { statement(s)-for-the-true-case; } else { statement(s)-for-the-false-case; } ```

Question 29

you cannot test the equality of two ____ numbers

Answer 29

floating-point

Question 30

what function can you use to generate a random number?

Answer 30

rand( )

Question 31

what header file is rand( ) defined under?

Answer 31

cstdlib

Question 32

what is the value of RAND_MAX?

Answer 32

32767

Question 33

the rand( ) function displays a integer between _____ and ___

Answer 33

0 and RAND_MAX (32767)

Question 34

what is meant when it is said that rand( ) is pseudo random?

Answer 34

the random function produces the same sequence of numbers every time it is executed on the same system

Question 35

when evaluating (p1 || p2) if p1 is true does the program read p2?

Answer 35

no

Question 36

how can you change the seed?

Answer 36

use srand(seed)

Question 37

what header file is srand( ) under?

Answer 37

cstdlib

Question 38

what is a way in which you can get a different sequnce of random numbers every time using the rand( ) function?

Answer 38

use srand with time(0) as the seed

Question 39

what header file is time( ) stored under?

Answer 39

ctime

Question 40

what is the operator for not?

Answer 40

!

Question 41

what is the operator for and?

Answer 41

&&

Question 42

what is the operator for or?

Answer 42

||

Question 43

what does the not (!) operator do?

Answer 43

negates the true to be false and the false to be true

Question 44

what does the and (&&) operator do?

Answer 44

reads true if and only if all the boolean operands are true

Question 45

what does the or (||) operator do?

Answer 45

reads true if any of the boolean operands are true

Question 46

is this correct c++ syntax? | 1<= numberOfDaysInAMonth<=31

Answer 46

no, this would produce a logic error. the following is the correct statement (1<=numberOfDaysInAMonth) && (31 >= numberOfDaysInAMonth)

Question 47

when evaluating (p1 && p2) if p1 is false does the program read p2?

Answer 47

no

Question 48

when evaluating (p1 || p2) if p1 is true does the program read p2?

Answer 48

no

Question 49

a switch statement checks ____ the cases abd executes the statements in the ____ ____

Answer 49

all | matched cases

Question 50

what is the syntax for a switch statement?

Answer 50

``` switch (switch-expression) { case value 1: statement(s)1;break; case value 2: statement(s)2;break; ....... case value n: statement(s)n;break; default: statement(s)-for-default; } ```

Question 51

in switch expressions the variable must always be ____

Answer 51

an integer

Question 52

when the value in a case statement matches the value of a switch expression the statements starting from that case are executed until

Answer 52

either a break statement or the end of the switch statement is reached

Question 53

what is the syntax of a conditional expression for an if else statement

Answer 53

boolean expression ? expression1 : expression 2 | where ? acts as if and : acts else

Question 54

what is the only ternary operator in C++ and why is it a ternary operator

Answer 54

the conditional expression formed by ? and : | it is ternary becayse it uses three operands