Electronics and Communication Engineering - Microprocessors

1. 

Assertion (A): In 8085 WR and RD signals are active high.

Reason (R): LOW WR means write operation and low RD means read operation.

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 D

Explanation:

WR and RD are active low.


2. 

Which of the following is not treated as hexadecimal constant by assembler in 8085?

A. 64 H
B. 5 AFH
C. AFH
D. OCFH

Answer: Option C

Explanation:

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

3. 

Which of the following real expressions is correct in Pascal?

A. - Z + P * X
B. (X + Y) (A + B)
C. Z ** M
D. Z P * M

Answer: Option A

Explanation:

All others are incorrect.


4. 

Each cell of static RAM contains

A. 4 MOS transistors
B. 4 MOS transistors and 1 capacitor
C. 2 MOS transistors
D. 4 MOS transistors and 2 capacitors

Answer: Option A

Explanation:

Each SRAM cell has 4 MOS transistors.


5. 

Which group of instructions is used to change sequence of operations in a computer program?

A. Data transfer group
B. Branch group
C. Arithmetic group
D. Logic group

Answer: Option B

Explanation:

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

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