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- Question
A 256 x 4 EPROM has
Options- A. 8 address pins and 4 data pins
- B. 8 address pins and 8 data pins
- C. 4 address pins and 8 data pins
- D. 4 address pins and 4 data pins
- Correct Answer
- 8 address pins and 4 data pins
Explanation28 = 256
Microprocessors problems
Search Results
- 1. If A = 20 and B = - 7 in PASCAL, A mod B =
Options- A. 6
- B. 2
- C. - 1
- D. 3 Discuss
Correct Answer: 6
Explanation:
It gives remainder in division operation.- 2. EEPROM permits
Options- A. read operation only
- B. read and byte erase operations
- C. read, byte erase and byte write operations
- D. read, byte erase, byte write and chip erase operations Discuss
Correct Answer: read, byte erase, byte write and chip erase operations
Explanation:
All the four are permitted.- 3. Consider the following program in Pascal
X = 2.57
X = (X + 0.06) * 10
I = TRUNC (X)
X = I
X = X / 10.0
The final value of X would be
Options- A. 2
- B. 2.6
- C. 2.63
- D. 26.3 Discuss
Correct Answer: 2.6
Explanation:
(2.57 + 0.06) 10 = 26.3 ?
.
- 4. To multiply a number by 8 in 8085 we have to use
RAL instruction
Options- A. once
- B. twice
- C. thrice
- D. four times Discuss
Correct Answer: thrice
Explanation:
When RAL instruction is used once the number is doubled.- 5. Assertion (A): If source and destination addresses are made implicit the length of instruction is reduced.
Reason (R): 8085 has only 3 addressing modes.
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 correct R is wrong
Explanation:
The number of addressing modes is five.- 6. Assume that x = 5 and y = 2. Then in Java operation x + = y, the result is
Options- A. x = 7
- B. x = 2
- C. x = 3
- D. x = 2 Discuss
Correct Answer: x = 7
Explanation:
The operator + = means add and assign.- 7. Which of the following is not a valid integer constant in C (for 16 bit)?
Options- A. 321
- B. -162
- C. -65321
- D. +1 Discuss
Correct Answer: -65321
Explanation:
The range is from - 32768 to + 32767.- 8. Which of the following can not be used as a variable name in C?
Options- A. else
- B. coal
- C. ram
- D. vendy Discuss
Correct Answer: else
Explanation:
else is not allowed as variable name in C.- 9. In Java it is possible to have
- An array of integers
- An array of string objects
- An array of arrays
- An array on integer and strings
Options- A. All
- B. 1, 2 and 3 only
- C. 1 and 2 only
- D. 1, 3 and 4 only Discuss
Correct Answer: 1, 2 and 3 only
Explanation:
An array on integers and strings is not possible.- 10. Which of the following is invalid in Basic?
Options- A. A ** B + - C
- B. A ** B - C
- C. A * B - C
- D. A * B - C ** D Discuss
Correct Answer: A ** B + - C
Explanation:
Two operators cannot exist together.
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