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MCQs

Total Questions : 275 | Page 22 of 28 pages
Question 211. In 8085 microprocessor , let the accumulator contains the value 0AH and register C contains the value 05H. After CMP C instruction is executed, the
  1.     zero flag will be reset and carry flag will be set
  2.     zero and carry flags will be reset
  3.     zero and carry flags will be set
  4.     zero flag will be set and carry flag will be reset
 Discuss Question
Answer: Option B. ->  zero and carry flags will be reset
Question 212. SUB A instruction in 8085
  1.     sets zero and carry flags
  2.     reset carry and sign flags
  3.     sets zero and sign flags
  4.     reset zero and parity flags
 Discuss Question
Answer: Option B. ->  reset carry and sign flags
Question 213. Which of the data transfer is not possible in microprocessor
  1.     memory to memory
  2.     accumulator to memory
  3.     memory to accumulator
  4.     I/O device to accumulator
 Discuss Question
Answer: Option A. ->  memory to memory
Question 214. In 8085 microprocessor, in response to RST 7.5 interrupts the execution is transferred to memory location
  1.     003CH
  2.     0000H
  3.     002CH
  4.     0034H
 Discuss Question
Answer: Option A. ->  003CH
Question 215. In 8085 microprocessor which one of the following statement is wrong
  1.     there is a pin available for serial output
  2.     serial I/O is not possible
  3.     serial I/O is possible through SIM and RIM instruction
  4.     there is a pin available for serial input
 Discuss Question
Answer: Option B. ->  serial I/O is not possible
Question 216. When any data transfer instruction, to transfer the data from memory to microprocessor, is executed the condition flags are
  1.     not affected
  2.     always set
  3.     affected indicating specific conditions
  4.     always reset
 Discuss Question
Answer: Option A. ->  not affected
Question 217. Let the content of register C be 00000000 before the instruction DCR C is executed. The content of register C after the after the execution of this instruction will be
  1.     00000001
  2.     11111111
  3.     00000000
  4.     None
 Discuss Question
Answer: Option B. ->  11111111
Question 218. Let the content of accumulator and register B be 0000 0100 and 0100 0000 respectively before execution of instruction SUB B. The content of accumulator after the execution of this instruction will be
  1.     01000000
  2.     010001000
  3.     00000100
  4.     11000100
 Discuss Question
Answer: Option D. ->  11000100
Question 219. EPROMs are preferred for storing programs while developing new microprocessor based system. Because of their
  1.     non-volatile characteristic
  2.     random access characteristic
  3.     erasable and programmable characteristic
  4.     all the above characteristic
 Discuss Question
Answer: Option C. ->  erasable and programmable characteristic
Question 220. Which of the following interrupt is both level and edge sensitive?
  1.     RST 7.5
  2.     RST 5.5
  3.     TRAP
  4.     INTR
 Discuss Question
Answer: Option C. ->  TRAP

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