CS 225 – Which of the following IF statements displays

Which of the following IF statements displays Hello?

A) int myVal = 4;

if (myVal < 10)

cout << “Hello”;

else

cout << “Bye”;

B) int myVal = 4;

if (myVal > 10)

cout << “Hello”;

else

cout << “Bye”;

C) int myVal = 10;

if (myVal < 10)

cout << “Hello”;

else

cout << “Bye”;

D) int myVal = 41;

if (myVal < 10)

cout << “Hello”;

else

cout << “Bye”;

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Question 2

Assuming num equals 4, which of the following IF statements is correct if the desired output is

statement1

statement2

A) if (num > 3)

cout << “statement 1” << endl;

cout << “statement 2” << endl;

else

cout << “statement 3” << endl;

cout << “statement 4” << endl;

B) if (num > 3) {

cout << “statement 1” << endl;

cout << “statement 2” << endl;

}

else {

cout << “statement 3” << endl;

cout << “statement 4” << endl;

}

C) if (num > 3)

cout << “statement 1” << endl;

cout << “statement 2” << endl;

else {

cout << “statement 3” << endl;

cout << “statement 4” << endl;

}

D) if (num > 3) {

cout << “statement 1”;

cout << “statement 2”;

}

else {

cout << “statement 3” << endl;

cout << “statement 4” << endl;

}

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Question 3

Assuming variable num equals 4, which of the following IF statements is correct if the desired output is

statement1 statement2

A) if (num > 3)

cout << “statement 1_”;

cout << “statement 2” << endl;

else

cout << “statement 3” << endl;

cout << “statement 4” << endl;

B) if (num > 3) {

cout << “statement 1” << endl;

cout << “statement 2” << endl;

}

else {

cout << “statement 3” << endl;

cout << “statement 4” << endl;

}

C) if (num > 3) {

cout << “statement 1 “;

cout << “statement 2” << endl;

}

else {

cout << “statement 3” << endl;

cout << “statement 4” << endl;

}

D) if (num > 3) {

cout << “statement 1” << endl;

cout << “statement 2”;

}

else {

cout << “statement 3” << endl;

cout << “statement 4” << endl;

}

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Question 4

What is displayed on the console based on the following code fragment?

int num = 2;

if (num == 2)

cout << “On”;

else

cout << “Off”;

A) Off

B) On

C) all of the above

D) none of the above

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Question 510 pts

What is displayed on the console based on the following code fragment?

int num = 3;

if (num == 2)

cout << “On”;

else

cout << “Off”;

Off

On

all of the above

none of the above

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Question 6

What is displayed on the console based on the following code fragment?

int num = 3;

if (num > -102)

cout << “On”;

else

cout << “Off”;

A) Off

B) On

C) all of the above

D) none of the above

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Question 7

What is displayed on the console based on the following code fragment?

int num = -40;

if (num <= 12)

cout << “On”;

else

cout << “Off”;

A) Off

B) On

C) all of the above

D) none of the above

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Question 8

What is displayed on the console based on the following code fragment?

int num = 40;

if (num >= 60) {

cout << “Passed”;

}

else if (num < 60) {

cout << “Failed”;

}

A) Passed

B) Failed

C) all of the above

D) none of the above

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Question 9

What is displayed on the console based on the following code fragment?

int num = 100;

if (num >= 60) {

cout << “Passed”;

}

else if (num < 60) {

cout << “Failed”;

}

A) Passed

B) Failed

C) all of the above

D) none of the above

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Question 10

What is displayed on the console based on the following code fragment?

int num = 78;

if (num >= 90) {

cout<<“Excellent”;

}

else if (num >= 80) {

cout<<“Above Average”;

}

else if (num >= 70) {

cout << “Average”;

}

else if (num >= 60) {

cout<<“Below Average”;

}

else {

cout << “Poor”;

}

A) Excellent

B) Above Average

C) Average

D) Below Average

E) Poor

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Question 11

What is displayed on the console based on the following code fragment?

int num = 8;

if (num >= 90) {

cout<<“Excellent”;

}

else if (num >= 80) {

cout<<“Above Average”;

}

else if (num >= 70) {

cout << “Average”;

}

else if (num >= 60) {

cout<<“Below Average”;

}

else {

cout << “Poor”;

}

A) Excellent

B) Above Average

C) Average

D) Below Average

E) Poor

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Question 12

What is displayed on the console based on the following code fragment?

int num = 91;

if (num >= 90) {

cout<<“Excellent”;

}

else if (num >= 80) {

cout<<“Above Average”;

}

else if (num >= 70) {

cout << “Average”;

}

else if (num >= 60) {

cout<<“Below Average”;

}

else {

cout << “Poor”;

}

A) Excellent

B) Above Average

C) Average

D) Below Average

E) Poor

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Question 13

What is displayed on the console based on the following code fragment?

int num = 91;

if (num >= 90) {

if (num < 100) {

cout<<“Good”;

}

else {

cout << “Bad”;

}

}

A) Bad

B) Good

C) BadGood

D) GoodBad

E) none of the above

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Question 14

What is displayed on the console based on the following code fragment?

int num = 123;

if (num >= 90) {

if (num < 100) {

cout<<“Good”;

}

else {

cout << “Bad”;

}

}

A) Bad

B) Good

C) BadGood

D) GoodBad

E) none of the above

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Question 1510 pts

In a ____ control structure, the computer executes particular statements depending on some condition(s).

A) looping

B) repetition

C) selection

D) sequence

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Question 16

What does <= mean?

A) less than

B) greater than

C) less than or equal to

D) greater than or equal to

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Question 17

Which of the following is the “not equal to” relational operator?

A) !

B) |

C) !=

D) &

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Question 18

Suppose x is 5 and y is 7. Choose the value of the following expression:

A) (x != 7) && (x <= y)

B) false

C) true

D) 0

E) null

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Question 19

Suppose that x is an int variable. Which of the following expressions always evaluates to true?

A) (x > 0) || ( x <= 0)

B) (x >= 0) || (x == 0)

C) (x > 0) && ( x <= 0)

D) (x > 0) && (x == 0)

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Question 20

The expression in an if statement is sometimes called a(n) ____.

A) selection statement

B) action statement

C) decision maker

D) action maker

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Question 21

When one control statement is located within another, it is said to be ____.

A) blocked

B) compound

C) nested

D) closed

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Question 22

The appearance of = in place of == resembles a(n) ____.

A) syntax error

B) silent killer

C) compilation error

D) input failure

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Question 23

What is the output of the following code?

char lastInitial = ‘S’;

switch (lastInitial)

{

case ‘A’:

cout << “section 1” <<endl;

break;

case ‘B’:

cout << “section 2” <<endl;

break;

case ‘C’:

cout << “section 3” <<endl;

break;

case ‘D’:

cout << “section 4” <<endl;

break;

default:

cout << “section 5” <<endl;

}

A) section 2

B) section 3

C) section 4

D) section 5

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Question 24

What is the output of the following code?

char lastInitial = ‘A’;

switch (lastInitial)

{

case ‘A’:

cout << “section 1” <<endl;

break;

case ‘B’:

cout << “section 2” <<endl;

break;

case ‘C’:

cout << “section 3” <<endl;

break;

case ‘D’:

cout << “section 4” <<endl;

break;

default:

cout << “section 5” <<endl;

}

A) section 1

B) section 2

C) section 3

D) section 5

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Question 25

What is the output of the following code fragment if the input value is 4?

int num;

int alpha = 10;

cin >> num;

switch (num)

{

case 3:

alpha++;

break;

case 4:

case 6:

alpha = alpha + 3;

case 8:

alpha = alpha + 4;

break;

default:

alpha = alpha + 5;

}

cout << alpha << endl;

A) 13

B) 14

C) 17

D) 22

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Question 26

What is the output of the following C++ code?

int x = 55;

int y = 5;

switch (x % 7)

{

case 0:

case 1:

y++;

case 2:

case 3:

y = y + 2;

case 4:

break;

case 5:

case 6:

y = y – 3;

}

cout << y << endl;

A) 2

B) 5

C) 8

D) 10

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Question 27

In ____ structures, the computer repeats particular statements a certain number of times depending on some condition(s).

looping

branching

selection

sequence

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Question 2810 pts

What is the output of the following C++ code?

num = 10;

while (num > 10)

num = num – 2;

cout << num << endl;

A) 0

B) 6

C) 8

D) 10

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Question 29

What is the output of the following C++ code?

num = 100;

while (num <= 150)

num = num + 5;

cout << num << endl;

A) 150

B) 155

C) 160

D) 165

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Question 30

A loop that continues to execute endlessly is called a(n) ____ loop.

A) end

B) unhinged

C) infinite

D) definite

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Question 31

Consider the following code.

int limit;

int reps = 0;

int entry;

int triple;

cin >> limit;

while (reps < limit)

{

cin >> entry;

triple = entry * 3;

cout << triple;

reps++;

}

cout << endl;

This code is an example of a(n) ____ while loop.

A) flag-controlled

B) counter-controlled

C) EOF-controlled

D) sentinel-controlled

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Question 32

A(n) ____-controlled while loop uses a bool variable to control the loop.

A) counter

B) sentinel

C) flag

D) EOF

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Question 33

Which of the following statements generates a random number between 0 and 50?

A) srand(time(0));

num = rand() % 50;

B) srand(time(10));

num = rand()/50;

C) srand(time(0));

num = rand()50;

D) srand(time(10));

num = rand() % 50;

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Question 34

What is the next Fibonacci number in the following sequence?

1, 1, 2, 3, 5, 8, 13, 21, …

A) 34

B) 43

C) 56

D) 273

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Question 35

What is the initial statement in the following for loop? (Assume that all variables are properly declared.)

int i;

for (i = 1; i < 20; i++)

cout << “Hello World”;

cout << “!” << endl;

A) i = 1;

B) i < 20;

C) i++;

D) cout << “Hello World”;

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Question 36

What is the output of the following C++ code?

int j;

for (j = 10; j <= 10; j++)

cout << j << ” “;

cout << j << endl;

A) 10

B) 10 10

C) 10 11

D) 11 11

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Question 37

Which of the following is a repetition structure in C++?

A) if

B) switch

C) while…do

D) do…while

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Question 38

What is the value of x after the following statements execute?

int x = 5;

int y = 30;

do

x = x * 2;

while (x < y);

A) 5

B) 10

C) 20

D) 40

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Question 39

What is the output of the following loop?

count = 5;

cout << ‘St’;

do

{

cout << ‘o’;

count–;

}

while (count <= 5);

A) St

B) Sto

C) Stop

D) This is an infinite loop.

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Question 40

____ loops are called posttest loops.

A) break

B) for

C) while

D) do…while

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