Electronics and Communication Engineering - Digital Electronics

6. 

Decimal 45.15 when converted into 9's complement will become

A. 54.84
B. 45.48
C. 48.54
D. 45.84

Answer: Option A

Explanation:

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7. 

Binary number 11011.01 when converted to its 2's complement will become

A. 0101.110
B. 01111.10
C. 01100.10
D. 00100.11

Answer: Option D

Explanation:

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8. 

A five bit binary adder is used to add 01001 and 00111. The adders from LSB position are numbered as FA0, FA1, FA2 and FA3. The outputs of FA2 are

A. SUM = 0
B. SUM = 0, CARRY = 1
C. SUM = 1, CARRY = 0
D. SUM = 1, CARRY = 1

Answer: Option A

Explanation:

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9. 

figure shows a NAND latch used as a switch debouncer. With the switch in STOP position. Q will be equal to

A. 0
B. 1
C. CLK
D. none of these

Answer: Option A

Explanation:

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10. 

The values of 25 in octal system is

A. 40
B. 20
C. 400
D. 200

Answer: Option A

Explanation:

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