Ch.3

Question 1

Which boolean operation is described by the following table?

A B Operation
True True True
True False True
False True True
False False False

Answer 1

or

Question 2

Which of the following data types may be used in a switch statement?

A) long

B) char

C) enum

D) int

E) all of the above

Answer 2

all of the above

Question 3

What is the value of the following expression?

(true && (4/3 || !(6)))

Answer 3

true

Question 4

When testing a program with a loop, which of the following tests should be done?

A) one less than the maximum number of iterations

B) no iterations of the loops

C) the maximum number of iterations

D) one more than the maximum number of iterations

E) A, B, and C

Answer 4

one less than the maximum number of iterations

no iterations of the loops

the maximum number of iterations

Question 5

Which of the following is not a good reason for choosing a certain loop control?

A) What the loop does

B) If the loop is in a function

C) The condition for ending the loop

D) The minimum number of iterations of the loop

Answer 5

If the loop is in a function

Question 6

Which of the following data types can be used in a switch controlling expression?

A) char

B) enum

C) float

D) int

E) A, B, and D

Answer 6

char

enum

int

Question 7

Which boolean operation is described by the following table?

A B Operation
True True True
True False False
False True False
False False False

Answer 7

and

Question 8

Given the following enumerated data type definition, what is the value of SAT?

enum myType{SUN=3,MON=1,TUE=3,WED,THUR,FRI,SAT,NumDays};

Answer 8

7

Question 9

What is the output of the following code fragment?

int i = 5;

switch(i)

{

case 0:i = 15;break;

case 1:i = 25;break;

case 2:i = 35;break;

case 3:i = 40;

default:i = 0;

}

Answer 9

0

Question 10

If you want a loop to quit iterating if x < 10 and y > 3, what would be the proper loop condition test?

Answer 10

(x >= 10 || y <= 3)

Question 11

Given the following enumerated data type definition, what is the value of SAT?

enum myType{SUN,MON,TUE,WED,THUR,FRI,SAT,NumDays};

Answer 11

6

Question 12

What is the value of x after the following code executes?

int x = 10;

if( ++ x > 10)

{

x = 13;

}

Answer 12

13

Question 13

What is the value of x after the following code executes?

int x = 10;

if(x ++ > 10)

{

x = 13;

}

Answer 13

11

Question 14

Which of the following are equivalent to (!(x < 15 && y >= 3))?

Answer 14

(x >= 15 || y < 3)

Question 15

If you need to write a do-while loop that will ask the user to enter a number between 2 and 5 inclusive, and will keep asking until the user enters a correct number, what is the loop condition?

Answer 15

(2 > number || number > 5)

Question 16

If a programming language does not use short-circuit evaluation, what is the output of the following code fragment if the value of myInt is 0?

int other = 3, myInt;

if(myInt != 0 && other % myInt != 0)

cout ≤≤ “other is odd\n”;

else

cout << “other is even\n”;

Answer 16

run-time error, no output

Question 17

What is wrong with the following for loop?

for(int i = 0;i < 10;i – )

{

cout << “Hello\n”;

}

Answer 17

infinite loop

Question 18

Which of the following are allowed in the third section of the for loop statement?

A) i ++

B) cout << “Hello\n”

C) i –

D) i += 2

E) all of the above

Answer 18

all of the above

Question 19

What is the output of the following code fragment?

int x = 0;

{

int x = 13;

cout ≤≤ x ≤≤ “,”;

}

cout ≤≤ x ≤≤ endl;

Answer 19

13,0

Question 20

Which of the following symbols has the highest precedence?

Answer 20

++

Question 21

A ________ expression is an expression that can be thought of as being true or false.

Answer 21

boolean

Question 22

A loop that iterates one too many or one too few times is said to be

Answer 22

off-by-one

Question 23

is a type whose values are defined by a list of constants of type int

Answer 23

enum

Question 24

Variables defined inside a set of braces are said to be ________ to that block of code

Answer 24

local

Question 25

A switch statement variable must be

Answer 25

an int char enum

Question 26

Each repetition of a loop body is called

Answer 26

iteration

Question 27

The compiler always pairs an else with

Answer 27

e nearest unpaired if

Question 28

In a compound logical and (&&) expression, the evaluation of the expression stops once one of the terms of the expression is false. This is known as ________ evaluation

Answer 28

short circuit

Question 29

A semicolon by itself is a valid C++ statement

Answer 29

True

Question 30

A break statement in a switch stops your program

Answer 30

False

Question 31

The break statement causes all loops to exit

Answer 31

False

Question 32

All switch statements can be converted into nested if-else statements

Answer 32

True

Question 33

A function may return a boolean value

Answer 33

True