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EXAM DSD

Total questions: 15

Worksheet time: 2hrs 31mins

Name
Class
Date
1.

SIMPLIFY THE FOLLOWING BOOLEAN EXPRESSION

a)

1

b)

0

c)

A

d)

A'

2.

FIND THE HAMMING CODE FOR 7-BIT DATA

1 0 0 1 1 0 1 (EVEN PARITY)

a)

1 0 1 0

b)

0 1 0 1

c)

0 1 1 0

d)

0 1 1 1

3.

CONVERT THE GIVEN GRAY CODE TO DECIMAL

1 0 1 1 0 0 1 0

a)

202

b)

220

c)

222

d)

221

4.

A final product of a plant is checked on two parameters: weight and size, using three sensors S1, S2, and S3. If weight is not up to acceptable limit, then S1=1, if diameter is below the limit S2=1 and S3=1 for diameter higher than the limit. The product is rejected if it is too large or both too small and too light. The rejection function R can be related as

a)

R = S1+S2+S3

b)

R = S1.S2.S3

c)

R = S1+S2.S3

d)

R = S1.S2+S3

5.

DETERMINE WHICH OF THE FOLLOWING EXPRESSIONS ARE EQUIVALENT TO

A⊙B

a)

A' B

b)

A' ⊙ B

c)

A ⊙ B'

d)

A' ⊕ B'

6.

The value of base x, if (211) base x = (152) base 8:

a)

x = 4

b)

x = 3

c)

x = 7

d)

x = 5

7.

WHAT MUST BE THE INPUT GIVEN TO 'R'

WHEN SR FLIPFLOP IS CONVERTED TO JK

a)

JQ'

b)

JQ

c)

KQ

d)

K'Q

8.

FIND THE MINTERMS AND MAXTERMS FOR THE EQUATION

a)

MINTERMS:125

MAXTERMS:03467

b)

MINTERMS:135

MAXTERMS:02467

c)

MINTERMS:124

MAXTERMS:03567

d)

MINTERMS:136

MAXTERMS:02457

9.

One of most desired feature for a digital design used in VLSI circuits is:

a)

SCALABILITY

b)

Low complexity

c)

High thermal dissipation

d)

Low power dissipation

10.

SIMPLIFY THE FOLLOWING BOOLEAN EXPRESSION

a)

1

b)

B

c)

0

d)

B'

11.

FIND THE SIMPLIFIED EQUATION FROM FOLLOWING

Σm(0,2,4,5,6,7,8,10,13,15)\Sigma m\left(0,2,4,5,6,7,8,10,13,15\right)  

a)
b)
c)
d)
12.

WHAT IS THE CHARACTERISTIC EQUATION OF JK FLIPFLOP

a)
b)
c)
d)
13.

The propagation delay in n-bit Ripple carry Adder is:

a)

n^2 times (propagation delay of one full adder)

b)

n times (propagation delay of one full adder)

c)

propagation delay of one full adder

d)

n/2 times (propagation delay of one full adder)

14.

How many errors can the Digital Electronics parity method can find in a single word?

a)

Single error

b)

Double error

c)

Triple error

d)

Multiple errors

15.

CONVERT THE FOLLOWING SOP EQUATION TO AN EQUIVALENT EQUATION

ABC+AB'C'+AB'C+ABC'+A'B'C

a)

(A'+B'+C')(A+B+C')(A'+B+C)

b)

(A+B+C)(A+B'+C)(A+B'+C')

c)

(A'+B'+C')(A+B'+C)(A+B'+C')

d)

(A'+B'+C')(A'+B+C')(A'+B'+C)