Electronics and Communication Engineering - Microprocessors

1. 

For a 16 bit computer the range of integer constants in C is

A. -32768 to + 32767
B. -32767 to + 32768
C. -65536 to + 65535
D. -65535 to + 65536

Answer: Option A

Explanation:

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2. 

In which group of 8085 instructions condition flags are not affected?

A. Data transfer group
B. Arithmetic group
C. Logical group
D. Both (a) and (c)

Answer: Option A

Explanation:

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3. 

In 8085, the instruction CMA is an example of

A. Implict addressing
B. Direct addressing
C. Register addressing
D. Immediate addressing

Answer: Option A

Explanation:

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4. 

Assertion (A): Static RAMS are used where speed of operation is of primary concern.

Reason (R): Dynamic RAM has lower cost per bit than static RAM.

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 correct R is wrong
D. A is wrong R is correct

Answer: Option B

Explanation:

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5. 

In 8085 the time required to add two 32 bit numbers is (if clock frequency is 5 MHz)

A. about 1 ns
B. about 1 μs
C. about 30 μs
D. about 100 μs

Answer: Option C

Explanation:

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