Electronics and Communication Engineering - Digital Electronics

1. 

The subtraction of a binary number Y from another binary number X, done by adding the 2's complement of Y to X results in a binary number without overflow. This implies that the result is

A. -ve and is in normal form
B. -ve and 2's complement form
C. +ve and is in normal form
D. +ve and in 2's complement

Answer: Option D

Explanation:

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2. 

The decimal equivalent of the binary number 10110.0101011101 is

A. 22.2408216500
B. 22.3408216750
C. 22.3408213125
D. 22.3408203125

Answer: Option D

Explanation:

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3. 

The initial contents of the 4 bit serial in parallel out right shift, shift register shown in figure is 0110. After three clock pulses are applied, the contents of the shift register will be

A. 0000
B. 0101
C. 1010
D. 1111

Answer: Option C

Explanation:

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4. 

In standard TTL the totem pole stage refers to

A. multiemitter input stage
B. phase splitter
C. output buffer
D. open collector output stage

Answer: Option C

Explanation:

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5. 

In 8085 microprocessor the value of the most significant bit of the result following the execution of any arithmetic or Boolean instruction is stored in

A. the carry status flag
B. the auxiliary carry status flag
C. sign status flag
D. zero status flag

Answer: Option C

Explanation:

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