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Electronics and Communication Engineering - Microprocessors

Exercise : Microprocessors - Section 4
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.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct R is wrong
A is wrong R is correct
Answer: Option
Explanation:

WR and RD are active low.

2.
Which of the following is not treated as hexadecimal constant by assembler in 8085?
64 H
5 AFH
AFH
OCFH
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
Which of the following real expressions is correct in Pascal?
- Z + P * X
(X + Y) (A + B)
Z ** M
Z P * M
Answer: Option
Explanation:

All others are incorrect.

4.
Each cell of static RAM contains
4 MOS transistors
4 MOS transistors and 1 capacitor
2 MOS transistors
4 MOS transistors and 2 capacitors
Answer: Option
Explanation:

Each SRAM cell has 4 MOS transistors.

5.
Which group of instructions is used to change sequence of operations in a computer program?
Data transfer group
Branch group
Arithmetic group
Logic group
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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