Computers Questions and Answers

Practice Mode
Showing 10 of 35 questions
Q11
What is occurring when two or more sources of data attempt to use the same bus?
  • A Bus contention
  • B Direct memory access
  • C Bus interruption
  • D PPI
Answer: Option A
Q12
Which of the following is not a jump instruction?
  • A JB (jump back)
  • B JA (jump above)
  • C JO (jump if overflow)
  • D JMP (unconditional jump)
Answer: Option A
Q13
Which of the following was not a design improvement for the 8086/8088 over the 8085?
  • A Execution unit (EU)
  • B 16-bit data bus
  • C Arithmetic logic unit (ALU)
  • D Bus interface unit (BIU)
Answer: Option C
Q14
Polled I/O works best when ________.
  • A there are no priority considerations
  • B priority considerations are frequent
  • C the polling rate exceeds 1000 s
  • D the polling rate is below 1000 s
Answer: Option A
Q15
Which of the following is not an arithmetic instruction?
  • A INC (increment)
  • B CMP (compare)
  • C DEC (decrement)
  • D ROL (rotate left)
Answer: Option D
Q16
During a read operation the CPU fetches ________.
  • A a program instruction
  • B another address
  • C data itself
  • D all of the above
Answer: Option D
Q17
The first Intel microprocessor to contain on-board cache memory was the ________.
  • A 80386
  • B 80486
  • C Pentium
  • D Pentium Pro
Answer: Option B
Q18
Which of the following is not an 8086/8088 general-purpose register?
  • A Code segment (CS)
  • B Data segment (DS)
  • C Stack segment (SS)
  • D Address segment (AS)
Answer: Option D
Q19
Which of the following is not a computer bus?
  • A Data bus
  • B Control bus
  • C Timer bus
  • D Address bus
Answer: Option C
Q20
With interrupt-driven I/O, if two or more devices request service at the same time, ________.
  • A the device closest to the CPU gets priority
  • B the device that is fastest gets priority
  • C the device assigned the highest priority is serviced first
  • D the system is likely to crash
Answer: Option C

📚 More from Digital Electronics

← All Topics 🎯 Practice ⏱️ Take Test 🔍 Search
Digital Electronics
Back to Digital Electronics
Other Subjects
Questions and Answers for Competitive Exams Various Entrance Test