# Electronics and Communication Engineering - Microprocessors

### Exercise :: Microprocessors - Section 11

1.

Which of the following is a valid integer constant?

 A. 127 B. 127.0 C. 127 D. 125 + 3

Explanation:

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

2.

The five flags in 8085 are designated as

 A. Z, CY, S, P and AC B. D, Z, S, P, AC C. Z, C, S, P, AC D. Z, CY, S, D, AC

Explanation:

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

3.

It is desired to evaluate the expression `F = B cos Y + C cos2 Y + A cos3 Y` The Pascal equivalent to ensure minimum computer time should be written as

 A. `F = B * COS (Y) + C * SQR (COS (Y) + A * COS (Y) * COS (Y) * COS (Y)` B. `F = B * COS (Y) + C * SQR [COS (Y)] + A * COS (Y) * SQR [COS (Y)]` C. `F = B * COS (Y) + C * COS(Y) * COS (Y) + A * COS (Y) * COS (Y) * COS (Y)` D. ` X = COS(Y)Z = SQR (X)F = B * X + C * Z + A * X * Z`

Explanation:

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

4.

 A. Direct B. Register C. Implicit D. Immediate

Explanation:

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

5.

Consider the following statements for 8085

1. The most significant 8 bits of address are transmitted on the 8 lines on which data is transmitted.
2. Eight pins are dedicated to transmit the most significant 8 bits of memory address.
3. The least significant 8 bits of address are transmitted on the lines on which data is transmitted.
4. The data and leass significant 8 bits are transmitted at different points in time.
Which of the above statements are correct?

 A. all B. 1, 2 and 3 only C. 2, 3 and 4 only D. 1, 3 and 4 only