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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
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
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
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
5 

The S (sign) flag is set when the contents of accumulator become negative during an operation.

A. True
B. False
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