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Electronics and Communication Engineering - Microprocessors

Exercise : Microprocessors - Section 9
26.

Assertion (A): In microprocessor 8085 DMA allows direct access to memory to speed up data transfer.

Reason (R): HOLD and HLDA signals are used for DMA operations.

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:
No answer description is available. Let's discuss.
27.
Which of the following is not a valid variable in FORTRAN 77?
BRG
VS
VS 3A
3 VSA
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
The expression A ** B / C + D is equivalent to
AB / C + D
AB / C + D
AB / (C + D)
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
Consider the following symbols
  1. Letters A to Z and a to z
  2. Digits 0 to 9
  3. Logical operators and, or, not
  4. Parenthesis ( )
Which of the above symbols are available in Pascal?
1 and 2 only
1, 2 and 3 only
1, 2 and 4 only
All
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
Which of the following 8085 instructions does not belong to arithmetic group?
SHLD addr
SUI data
ADCM
INR r
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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