hello friends.
 Microprocessor and Micro-controller  important topic for every examination question. here discuss 35 mcq type question from it and there answer in marked BOLD option 

hint:- answer in bold latter 

01․ What is mean by ALU

 Arithmetic logic upgrade

 Arithmetic logic unsigned

 Arithmetic local unsigned

 Arithmetic logic unit

02․ which of the following lists the interrupt in decreasing order of priority?

 TRAP, RST 5.5, RST 6.5, RST 7.5, INTR

 INTR, TRAP, RST 7.5, RST 6.5, RST 5.5

 TRAP, RST 7.5, RST 6.5, RST 5.5, INTR

 RST 7.5, RST 6.5, RST 5.5, TRAP, INTR

03․ Which of the following interrupt is only edge sensitive?

 RST 7.5

 TRAP

 RST6.5

 RST 5.5

04․ Maximum number of I/O that can be addressed by the INTEL 8085 is

 65536

 285

 512

 256

05․ The microprocessor may be made to exit from HALT state by asserting

 RESTART

 any of the five interrupt lines

 READY line

 A or B or HOLD line

6. The data lines of 8085 microprocessor are multiplexed with

 higher order address lines

 lower order address lines

 status lines

 none of the above

7.  The content of the A₁₅-A₈ (higher order address lines) while executing “IN 8-bit port address” instruction are

 same as the content of A7-A0

 irrelevant

 all bits reset (i.e. 00H)

 all bits set (i.e. FFH )

8․ Which one of the following ICs is used to interface keyboard and display?

 8251

 8279

 8259

 8253

9.  The execution of RST n instruction causes the stack pointer to

 increment by two

 decrement by two

 remain unaffected

 none of the above

 10.  The stack is nothing but a set of

 reserved ROM address space

 reserved RAM address space

 reserved I/O address space

 none of the above

11 . S₀ and S₁ pins are used for

 serial communication

 indicating the processor’s status

 acknowledging the interrupt

 none of the above

12․ Identify the programmable DMA controller number from the following

 8257

 8253

 8251

 8279

13. Identify  the programmable interrupt controller from the following

 8279

 8259

 8257

 8275

14. Identify the non-programmable interfacing device from the following

 8295.

 8257.

 8212.

 8255.

 15. In a vector interrupt

 the branch address is assigned to a fixed location in memory.

 the interrupting source supplies the branch information to the processor through an interrupt vector.

 the branch address is obtained from a register in the processor.

 none.

16. The process to file transfer from internet to computer.

 Uploading

 Downloading

 Browsing

Searching

17 what is address given to computer connected to network are known.

 System address

 SISID

 PROCESS ID

 IP address

 18. ..................... is process to finding errors in software code.

 Compiling

 Assembling

 Interpreting

Debugging

19.  Identify the programmable interval timer from the following

 8252

 8253

 8279

 8275

20. 8085 microprocessor has how many pins

  30.

 39.

 40.

 41.

hint 27 output pin

21.  the computer code of interchange information between terminal

  ASCII

  BCD

  BCDIC

 HOLLERITH

22. In 8085 name/names of the 16 bit registers is/are

 Stack pointer.

 Program counter.

 Both A and B.

 None of these

23. The ROM programmed during manufacturing process itself is called

 MROM

 PROM

 EPROM

 EEPROM

24. WHAT ARE .bas .doc and .html  example of ..

 Extension

 domen

 Database

 Protocol

25. What is the name of software that allows to us through web pages called?

 Browser

 Mail client

 FTP client

 Messenger

26. Which is not An operating system.

DOS

 Oracle

 Lunix

 Windows

27. in an intel 8085A microprocessor, why is READY signal used ?

 To indicate to user that the microprocessor is working and is ready for use.

 To provide proper Wait states when the microprocessor is communicating with a slow peripheral device.

 To slow down a fast peripheral device so as to communicate at the microprocessor’s device.

 None of the above.

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

 Accumulator, temporary register, arithmetic and logic circuits

 Accumulator, arithmetic, logic circuits and five flags

 Accumulator, arithmetic and logic circuits

 Accumulator, temporary register, arithmetic, logic circuits and five flags

29.  The clock speed of 8085 is

 1 MHz

 2 KHz.

 3.2 KHz.

 3.2 MHz

 30. The first machine cycle of an instruction is always

 A memory read cycle

 A fetch cycle

 An I/O read cycle

 A memory writes cycle

31.  The correct sequence of steps in the instruction cycle of a basic computer is

 Fetch, Execute, Decode and Read effective address.

 Read effective address, Decode, Fetch and Execute.

 Fetch, Decode, Read effective address and, Execute.

 Fetch, Read effective address, Decode and Execute.

32.    Ready pin of microprocessor is used

 To indicate that microprocessor is ready to receive inputs

 To indicate that microprocessor is ready to receive outputs

 To introduce wait state

 To provide direct memory access

33.   A high on RESET OUT signifies that

 All the registers of the CPU are being reset

 All the registers and counters are being reset

 All the registers and counters are being reset and this signal can be used to reset external support chip

 Processing can begin when this signal goes hig

34.   Temporary registers in 8085 are

 B and C.

 D and E.

 H and L.

 W and Z.

35.   Register pair used to indicate memory

 B and C

 D and E

 H and L

 W and Z