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Electronics and Communication Engineering:: Microprocessors
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Section 4
Exercise
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Section 9
Section 8
Section 10
Section 11
Section 12
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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 & Explanation
Option D
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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 & Explanation
Option C
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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 & Explanation
Option A
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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 & Explanation
Option A
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5
The S (sign) flag is set when the contents of accumulator become negative during an operation.
A.
True
B.
False
Answer & Explanation
Option A
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