Question 1

1. Convert A.B + B.C’ to its canonical SOP form using Boolean Algebra and choose the answer from the following:

[2]

Accepted Answer

ABC + ABC’ +A’BC’

Answer

A+BC

Answer

A’B’C’ + ABC

Answer

ABC + A’BC + AB’C’

Question 2

2. Complement of the expression A’B + CD’ is ________________ [2]

Accepted Answer

(A+B’)(C’+D)

Answer

(A+B’)(C+D’)

Answer

(A’+B)(C’+D)

Answer

(A’+B’)(C’+D’)

Question 3

3. Simplify y=AB’+(A’+B)C [2]

Accepted Answer

AB’+C

Answer

AB+AC

Answer

A’B+AC’

Answer

A’B+AC’

Question 4

4. Reduce the given Boolean function F(A,B,C,D)=€( 0, 3, 4, 7, 8, 11, 12, 15) by using4-variable Karnaugh map and answer the following questions:

What will be the least number of groups and their types formed for reduction? [1]

Accepted Answer

2 quads

Answer

2 pairs

Answer

4 quads

Answer

1 octet

Question 5

5. Reduce the given Boolean function F(A,B,C,D)=€( 0, 3, 4, 7, 8, 11, 12, 15) by using4-variable Karnaugh map and answer the following questions:

The reduced expression of the Boolean function given above is: [2]

Accepted Answer

CD+C’D’

Answer

C’D+CD’

Answer

AD+C’D

Answer

A’CD+B’D’

Question 6

6. Simplify the given expression and choose the answer from the following: [2](A.B’ + AB) (A+B)

Accepted Answer

A

Answer

B

Answer

BA

Answer

AB'

Question 7

7. Choose the dual of F=(p+1).(q’+0) [2]

Accepted Answer

F=(p.0)+(q’.1)

Answer

F=(p+1).(q+0)

Answer

F=(p+0).(q’+0)

Answer

F=(p.1)+(q.1)

Question 8

8. Q18. Predict the output from the given code snippet, when value of n=567. [2]void function(int n)

{

while(true)

{

n/=10;break;

}

System.out.println(n*10);

}

Accepted Answer

560

Answer

765

Answer

567

Answer

7

Question 9

9. Predict the output from the given code snippet.

[2]void test()

{

String str=”COMPUTER IS FUN”;

String s=str.substring(str.indexOf(‘U’), str.lastIndexOf(‘U’));

System.out.println(s);

}

Accepted Answer

UTER IS F

Answer

OMPUTER IS F

Answer

UTER IS FU

Answer

UTER IS FUN

Question 10

10. Choose the answer after Converting X + Y to minterms. [2]

Accepted Answer

XY + XY’ + X’Y

Answer

XY + X’Y’

Answer

None of the above

Answer

X’Y + XY’

Question 11

11. Simplify the given expression and choose the answer from the following: [2]

Accepted Answer

A

Answer

AC'

Answer

BA

Answer

AB'

Question 12

12. Reduce the given Boolean function F(A,B,C,D)=π(1, 2, 5, 6, 9, 11, 13, 15)

What will be the least number of groups and their types formed for reduction? [1]

Accepted Answer

1 pair 2 quads

Answer

2 pairs 1 quad

Answer

2 pairs 2 quads

Answer

1 octet

Question 13

13. Reduce the given Boolean function F(A,B,C,D)=π(1, 2, 5, 6, 9, 11, 13, 15)

The reduced expression of the Boolean function given above is: [2]

Accepted Answer

(A+C’+D).(C+D’).(A’+D’)

Answer

(A’+D’).(C’+D)

Answer

(A’+C’+D’)(C+D’).(A’+D)

Answer

(A+B+C’).(C+D’)

Question 14

14. With reference to the program code given below, answer the questions that follow:void calculate(int x)

{

int s=0;

for(int i=1; i

if( x%i==0)

s=s+i;

if(s==x)

System.out.println(_______________);

}

Choose the correct print message for the above method calculate(), when x=28. [1]

Accepted Answer

Perfect Number

Answer

Duck number

Answer

Prime number

Answer

Armstrong number

Question 15

15. With reference to the program code given below, answer the questions that follow:void calculate(int x)

{

int s=0;

for(int i=1; i

if( x%i==0)

s=s+i;

if(s==x)

System.out.println(_______________);

}

What is the output of the method calculate() when x=4? [2]

Accepted Answer

6

Answer

7

Answer

5

Answer

28

Question 16

16. Answer the question that follows:

void show(int n, int d)

{

int k=1;

while(n>1)

{

if(n%d==0)

{

k=k*d;

n=n/d;

}

else

d++;

}

System.out.println(k);

}

What is the output of function show(24,2) ? [2]

Accepted Answer

24

Answer

16

Answer

12

Answer

48

Question 17

17. Answer the question that follows:

void show(int n, int d)

{

int k=1;

while(n>1)

{

if(n%d==0)

{

k=k*d;

n=n/d;

}

else

d++;

}

System.out.println(k);

}

What is the output of function show(0,0)? [1]

Accepted Answer

1

Answer

2

Answer

3

Answer

None of the Above

Question 18

18. The following public method is part of some class. Assume that the parameters x andy are positive integers. answer the questions following it. Show dry run/working.

int Afunction(int x, int y)

{

int p=1, n=x;

while(y>0)

{

if(y%2==1)

p*=n;

y/=2;

n*=n;

}

return p;

}

What will be returned by Afunction(2,7) when invoked? [2]

Accepted Answer

128

Answer

126

Answer

125

Answer

127

Question 19

19. The following public method is part of some class. Assume that the parameters x andy are positive integers. answer the questions following it. Show dry run/working.

int Afunction(int x, int y)

{

int p=1, n=x;

while(y>0)

{

if(y%2==1)

p*=n;

y/=2;

n*=n;

}

return p;

}

What will be the final value of n by Afunction(2,7) when invoked? [1]

Accepted Answer

256

Answer

128

Answer

228

Answer

156

Question 20

20. A company intends to develop a device to show the high status power load for ahousehold invertor depending on the criteria given below:

• If Air conditioner and Geyser are onOR

• If Air conditioner is off, but Geyser and Refrigerator are onOR

• If Geyser is off, but Air conditioner and Water purifier are onOR

• When all are on

The inputs are:

INPUT A- Air conditioner is on

G- Geyser is on

R- Refrigerator is on

W- Water purifier is on

(In all the above cases 1 indicates yes and 0 indicates no)

Output: X [ 1 indicates high power, 0 indicates low power for all cases]

Choose the SOP expression for X(A,G,R,W) [2]

Accepted Answer

RW + AWR’ + AW

Answer

R’W + A’W’R’

Answer

RW’ + AWR’ + AW

Answer

RAW + A’W’

Question 21

21. A company intends to develop a device to show the high status power load for ahousehold invertor depending on the criteria given below:

• If Air conditioner and Geyser are onOR

• If Air conditioner is off, but Geyser and Refrigerator are onOR

• If Geyser is off, but Air conditioner and Water purifier are onOR

• When all are on

The inputs are:

INPUT A- Air conditioner is on

G- Geyser is on

R- Refrigerator is on

W- Water purifier is on

(In all the above cases 1 indicates yes and 0 indicates no)

Output: X [ 1 indicates high power, 0 indicates low power for all cases]

Choose the SOP expression for X(A,G,R,W)

How many 1’s will be in resultant column? [1]

Accepted Answer

8

Answer

3

Answer

5

Answer

6

Question 22

22. The following function is a part of some class to compute that the number isArmstrong or not. If sum of cube of all the digits of a number is equal to the number, then itis Armstrong. The function returns true if B is Armstrong otherwise returns false. There arefive places in the code marked by ?1?, ?2?, ?3?, ?4?, ?5? which must be replaced bystatement or expression so that the function runs correctly.

boolean checkNum(int B)

{

int sum=0, num=?1?;

while(B>0)

{

int d=?2?;

sum=sum+?3?;

B=?4?;

}

if(?5?)

return true;

else

return false;

}

What is the expression or statement at ?1?

boolean checkNum(int B)

{

int sum=0, num=?1?;

while(B>0)

{

int d=?2?;

sum=sum+?3?;

B=?4?;

}

if(?5?)

return true;

else

return false;

}

What is the expression or statement at ?1?

Accepted Answer

B

Answer

sum

Answer

sum/2

Answer

num/2

Question 23

23. The following function is a part of some class to compute that the number is Armstrong or not. If sum of cube of all the digits of a number is equal to the number, then it is Armstrong. The function returns true if B is Armstrong otherwise returns false. There are five places in the code marked by ?1?, ?2?, ?3?, ?4?, ?5? which must be replaced by statement or expression so that the function runs correctly.

boolean check Num(int B)

{

int sum=0, num=?1?;

while(B>0)

{

int d=?2?;

sum=sum+?3?;

B=?4?;

}

if(?5?)

return true;

else

return false;

}

What is the expression or statement at ?2?

boolean check Num(int B)

{

int sum=0, num=?1?;

while(B>0)

{

int d=?2?;

sum=sum+?3?;

B=?4?;

}

if(?5?)

return true;

else

return false;

}

What is the expression or statement at ?2?

Accepted Answer

B%10

Answer

B/2

Answer

num%2

Answer

num/2

Question 24

24. The following function is a part of some class to compute that the number is Armstrong or not. If sum of cube of all the digits of a number is equal to the number, then it is Armstrong. The function returns true if B is Armstrong otherwise returns false. There are five places in the code marked by ?1?, ?2?, ?3?, ?4?, ?5? which must be replaced by statement or expression so that the function runs correctly.

boolean check Num(int B)

{

int sum=0, num=?1?;

while(B>0)

{

int d=?2?;

sum=sum+?3?;

B=?4?;

}

if(?5?)

return true;

else

return false;

}

What is the expression or statement at ?3?

boolean check Num(int B)

{

int sum=0, num=?1?;

while(B>0)

{

int d=?2?;

sum=sum+?3?;

B=?4?;

}

if(?5?)

return true;

else

return false;

}

What is the expression or statement at ?3?

Accepted Answer

(int)Math.pow(d,3)

Answer

num*d

Answer

num*B

Answer

d*d

Related quizzes

Related quizzes