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Electronics and Communication Engineering - Digital Electronics

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Exercise :: Digital Electronics - Section 7

46. 

In the 8421 BCD code, the decimal number 125, is written as
A. 1111101
B. 0001 0010 0101
C. 7 D
D. none of these

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.
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47. 

110.112 x 1102 = __________ 10
A. 40.5
B. 30.5
C. 20.5
D. 10.5

Answer: Option A

Explanation:

110.11 =6.75 and 110 = 6 and 6.75 x 6 = 40.5 in decimal.

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48. 

Y = A + A B is the same as
A. Y = AB
B. Y = A + B
C. Y = A + B
D. Y = A + B

Answer: Option B

Explanation:

Verify by preparing truth table.

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49. 

Assertion (A): Different symbols are used for different gates

Reason (R): IEEE symbols are the same as traditional symbols for gates.
A. Both A and R are correct and R is correct explanation of A
B. Both A and R are correct but R is not correct explanation of A
C. A is true, R is false
D. A is false, R is true

Answer: Option C

Explanation:

IEEE symbols are different than traditional symbols.

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