Microprocessor & Microcontroller QUIZ
Q: After reset, SP register is initialized to address________.
Q: In a microprocessor, the register which holds the address of the next instruction to be fetched is___.
- A: Accumulator
- B: Program counter
- C: Stack pointer
- D: Instruction register
Q: In a microprocessor system, the stack is used for___.
- A: Storing the program return address whenever a sub-routine jump instruction is executed.
- B: Transmitting and receiving input-output data.
- C: Storing all important CPU register contents whenever an interrupt is to be serviced.
- D: Storing program instructions for interrupt service routines.
Q: An I/O processor control the flow of information between ___.
- A: main memory and I/O devices
- B: cache memory and I/O devices
- C: two I/O devices
- D: cache and main memories
Q: Microprocessor 8085 regains control of the bus___.
- A: Immediately after HOLD goes high
- B: Immediately after HOLD goes low
- C: After half-clock cycle after HLDA goes low
- D: After half-clock cycle after HLDA goes high
Q: In register index addressing mode, the effective address is given by ___.
Explaina
- A: The index register value.
- B: The sum of the index register value and the operand.
- C: The operand.
- D: The difference of the index register value and the operand.
Q: The total number of memory accesses involved (inclusive of the op-code fetch), when an 8085 processor executes the instruction LDA 2003 is____.
Q: . The 8051 microcontroller is of ___pin package as a ______ processor.
- A: 30, 1byte
- B: 20, 1 byte
- C: 40, 8 bit
- D: 40, 8 byte
Q: . In 8051 which interrupt has highest priority?
- A: IE1
- B: TF0
- C: IE0
- D: TF1
Q: The number of interrupt lines in 8085 is ____.