Electronics and Communication Engineering - Microprocessors

6. 

Consider the following statements about constants in 8085

  1. The assembler treats 64 H as hexadecimal constant.
  2. The assembler treats 154 as binary constant.
  3. The assembler treats 540 as octal constant.
  4. The assembler treats 138 as decimal constant.
Which of the above are correct?

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

Answer: Option B

Explanation:

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7. 

Internally the two distinct units of 8086 are called

A. bus interface unit and execution unit
B. command unit and follow unit
C. master unit and slave unit
D. memory unit and operation unit

Answer: Option A

Explanation:

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8. 

Which of the following directives in 8085 causes one byte to be reserved in the memory?

A. D S
B. D B
C. D W
D. E Q U

Answer: Option D

Explanation:

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9. 

The chip 8259 is a

A. programmable interrupt controller
B. programmable peripheral interface
C. I/O device
D. memory chip

Answer: Option A

Explanation:

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10. 

A computer memory is an ordered sequence of storage cells.

A. True
B. False

Answer: Option A

Explanation:

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