Electronics and Communication Engineering - Microprocessors

Exercise :: Microprocessors - Section 11
1.
Which of the following is a valid integer constant?

Answer: Option A

Explanation:

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

Answer: Option A

Explanation:

3.
It is desired to evaluate the expression F = B cos Y + C cos^{2} Y + A cos^{3} 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

Answer: Option D

Explanation:

4.
In 8085 which addressing mode is also called inherent addressing?

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

Answer: Option C

Explanation:

5.
Consider the following statements for 8085

The most significant 8 bits of address are transmitted on the 8 lines on which data is transmitted. Eight pins are dedicated to transmit the most significant 8 bits of memory address. The least significant 8 bits of address are transmitted on the lines on which data is transmitted. 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

Answer: Option C

Explanation: