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Electronics and Communication Engineering - Microprocessors

Exercise : Microprocessors - Section 11
1.
Which of the following is a valid integer constant?
127
127.0
127
125 + 3
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
The five flags in 8085 are designated as
Z, CY, S, P and AC
D, Z, S, P, AC
Z, C, S, P, AC
Z, CY, S, D, AC
Answer: Option
Explanation:
No answer description is available. Let's 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
F = B * COS (Y) + C * SQR (COS (Y) + A * COS (Y) * COS (Y) * COS (Y)
F = B * COS (Y) + C * SQR [COS (Y)] + A * COS (Y) * SQR [COS (Y)]
F = B * COS (Y) + C * COS(Y) * COS (Y) + A * COS (Y) * COS (Y) * COS (Y)
X = COS(Y)
Z = SQR (X)
F = B * X + C * Z + A * X * Z
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
In 8085 which addressing mode is also called inherent addressing?
Direct
Register
Implicit
Immediate
Answer: Option
Explanation:
No answer description is available. Let's 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?
all
1, 2 and 3 only
2, 3 and 4 only
1, 3 and 4 only
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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