Microprocessors and Microcontrollers Bank PO MCQ Questions With... Quiz Questions

1. RIM is used to check whether

A The interrupt is Masked or not B The write operation is done or not C both 1 & 2 D None of these

2. The cycle required to fetch and execute an instruction in a 8085 microprocessor is which one of the following?

A Clock cycle B Memory cycle C Machine cycle D Instruction cycle

3. MOV B, A is a ________ addressing mode.

A register B register indirect C Immediate D Direct

4. In assembly language program, one byte instruction will have ____ number of operands.

A 1 B 0 C 2 D 3

5. In an intel 8085A microprocessor, why is READY signal used?

A To indicate to user that the microprocessor is working and is ready for use. B To provide proper WAIT states when the microprocessor is communicating with a slow peripheral device. C To slow down a fast peripheral device so as to communicate at the microprocessor’s device. D None of the above.

6. The external system bus architecture is created using from ______ architecture:

A Pascal B Dennis Ritchie C Charles Babbage D Von Neumann

7. Which one is NOT a Logical and Bit Manipulation instruction?

A ANA B B ORA B C XRA B D DCR B

8. Priority interrupts of 8085a. TRAP b.RST 5.5 c.RST 7.5 d.RST 6.5 e.INTR

A a,c,d,b,e B a,b,c,d,e C b,a,c,d,e D c,d,e,a,b

9. IO/M(active low) =0,S1=1,S0=1 resembles.

A memory read B opcode fetch C memory write D I/O read

10. Pin number 35 in 8085 microprocessor is

A IO/M(active low) B RESET IN(active low) C READY D CLK

11. Pin number 29 in 8085 microprocessor is

A S0 B S1 C A15 D RESET

12. ______ is needed to convert a high level language to machine language

A compiler B assembler C browser D editor

13. Consider the followingI) Sign flag II) Trap flag III) Parity flag IV) Auxiliary carry flagWhich one of the above flags is/are present in 8085 microprocessor?

A (I) only B (I) & (II) C (II) & (III) D (I) ,(III) & (IV)

14. 8085 Instruction set has 76 opcodes(eg.MOV,MVI) and ____number of instructions

A 200 B 246 C 250 D 300

15. How many address lines in a 4096*8 EPROM CHIP?

A 12 B 11 C 15 D 16

16. What does the following pictorial representation of PUSH operation in the stack pointer indicate among the below stated conclusions/inferences?A. Stack Pointer is incremented by 2B. Location 55H in on-chip stack memory gets loaded with 44HC. Stack Pointer gets initialized by 56HD. Data Pointer gets loaded with an immediate data 44H which ultimately leads to initialization of stack pointer

A only A B B & D C C & D D only B

17. ALU (Arithmetic and Logic Unit ) of 8085 microprocessor consists of

A Accumulator, temporary register, arithmetic, logic circuits B Accumulator, temporary register, arithmetic, logic circuits and five flags C Accumulator, arithmetic, logic circuits and five flags D Accumulator, temporary register and five flags

18. Consider the following statements:In 8085 microprocessor, data-bus and address bus are multiplexed in order to I)Increase the speed of microprocessor. II)Reduce the number of pins. III)Connect more peripheral chips. Which of these statements is/are correct?

A (I) only B (II) only C (II) & (III) D (I), (II), (III)

19. What is the status of stack pointer for the execution of PUSH and POP operations ?

A It gets post-decremented for PUSH & pre-incremented for POP B It gets pre-incremented for PUSH as well as POP C It gets pre-incremented for PUSH & post-decremented for POP D It gets post-decremented for PUSH as well as POP

20. IO/M(active low )-- this signal is status signal to differentiate between I/O andmemory operation

A Yes B NO