Discussion
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- Question
Temporary register in 8085 is a 16 bit register.
Options- A. True
- B. False
- Correct Answer
- False
ExplanationIt is 8 bit-register.
Microprocessors problems
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- 1. The size of cache memory in most microcomputers is about
Options- A. a few bytes
- B. a few kilobytes
- C. a few megabytes
- D. a few gigabytes Discuss
Correct Answer: a few kilobytes
Explanation:
Size of Cache memory varies from about 16 K bytes to about 256 K bytes.- 2.
JCOKE = 3
JCOKE = JCOKE + 1
GO TO (5, 8, 9, 11, 15, 16 18, 20) JCOKE.
After the execution of above statement, the control is transferred to statement number
Options- A. 8
- B. 11
- C. 16
- D. 20 Discuss
Correct Answer: 11
Explanation:
It is a computed GO TO statement. Since J COKE = 3 + 1 = 4, the control is transferred to statement 11.- 3. Expression ++i is equivalent to
Options- A. i = i + 2
- B. i = i + 1
- C. i = i - 1
- D. i = i + i + i Discuss
Correct Answer: i = i + 1
Explanation:
i is incremented by 1.- 4. When .4546 E 5 and .5433 E 7 are to be added in normalized floating point mode
Options- A. none of the numbers is changed to any other form
- B. .4546 E 5 is changed .004546 E 7 and .5433 E 7 is not changed
- C. .5433 E 7 is changed to 54.33 E 5 and .4546 E 5 is not changed
- D. both the numbers are changed and their exponents are made equal to 6 Discuss
Correct Answer: .4546 E 5 is changed .004546 E 7 and .5433 E 7 is not changed
Explanation:
Exponents are made equal and integer part is made zero.- 5. During processing the instructions, data, intermediate results and final results in a computer are held in
Options- A. CPU
- B. ALU
- C. Primary memory
- D. Secondary memory Discuss
Correct Answer: Primary memory
Explanation:
Primary memory holds these during processing of instructions.- 6. In which computer language is 'break' statement used
Options- A. Fortran 77
- B. Pascal
- C. C
- D. none of the above Discuss
Correct Answer: C
Explanation:
Whenever keyword 'break' is encountered inside any C loop control passes to the first statement after the loop.- 7. Which of the following is not an integer constant?
Options- A. 0
- B. -8
- C. +1074
- D. -8.1 Discuss
Correct Answer: -8.1
Explanation:
Integer constant should not have decimal point.- 8. Z flag is reset if an ALU operation results in 0.
Options- A. True
- B. False Discuss
Correct Answer: False
Explanation:
Z flag is set if ALU operation results in zero.- 9. Assertion (A): Microprocessor 8085 has on-chip oscillator with inbuilt crystal.
Reason (R): For frequency stability crystal oscillator is preferred.
Options- A. Both A and R are correct and R is correct explanation of A
- B. Both A and R are correct but R is not correct explanation of A
- C. A is correct R is wrong
- D. A is wrong R is correct Discuss
Correct Answer: A is wrong R is correct
Explanation:
Crystal has to be connected externally to pins 1 and 2 of 8085.- 10. Which of the following is not a valid real constant in C?
Options- A. 1.2 e 2.0
- B. -2.3 e - 2
- C. -2.3 E 2
- D. -2.3 e 2 Discuss
Correct Answer: -2.3 E 2
Explanation:
In C real constant expressed in exponential form, mantissia and exponent should be separated by e (and not E).
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