XII COMPUTER SCIENCE (D9) PAPER II CHAPTERWISE QUESTION BANK

QUESTION BANK 

XII COMPUTER SCIENCE (D9) – PAPER II

Chapter 1: Introduction to microprocessor and Organization of 8085

 

Question no.	Question
1.	The register which stores the result of arithmetic and logic operations is called as ………… i.                 Program counter ii.               Accumulator iii.             Stack pointer iv.             D.  Temporary register
2.	Program counter in 8085 Microprocessor ………. i.                 Counts number of programs ii.               Counts number of times a subroutine is called iii.             Counts the number of times loop are executed iv.             Points to the address of the next instruction to be executed
3.	In Intel 8085 Microprocessor, ALE signal made high to……. i.                 Enable AD0-AD7 bus to be used as lower order  a. address  bus ii.               Enable AD0-AD7 bus to be used as data bus (D0-D7) iii.             To halt the processor iv.             D.  To reset the microprocessor
4.	………. is a non Vectored interrupt in 8085. i.      RST 7.5 ii.      RST 6.5 iii.      INTR iv.           TRAP
5.	………….. is a lowest priority interrupt i.      RST 5.5 ii.      RST 6.5 iii.      TRAP iv.           INTR
6.	.......... is the only non- maskable interrupt i.             TRAP ii.          RST 5.5 iii.     RST 7.5 iv.      RST 6.5
7.	………….. is not valid register pair in 8085 microprocessor i.      B C pair ii.          H L pair iii.            Accumulator and flag register iv.             D E pair

 

8	Which of the following statement for INTEL 8085 is correct? i.                 Program counter specifies the address of the last instruction executed ii.              Program counter specifies the number of instructions executed so far iii.            Program counter specifies the address of the next  instruction to be  executed iv.             Program counter specifies the address of instruction being executed
9.	Which of the following data transfer is not possible in 8085 microprocessor? i.                 Memory to Accumulator ii.               Accumulator to memory iii.             Accumulator to I/O device iv.             Memory to memory
10.	If the status of S0 and S1 pin is low, the microprocessor performs the ………………. i.    Reset operation ii.         Halt operation iii.             Hold operation iv.             Interrupt acknowledge
11	In 8085 microprocessor, the stack works on the principle of…… i.               First in first out( FIFO) ii.            Last in last out( LILO) iii.          Last in first out( LIFO) iv.           None
12	8085 requires …….Power supply i.                 +5 V ii.               +15 V iii.             -5 V iv.             +10V
13.	The 8085 microprocessor can address …….. bytes of memory i.    1k ii.         4k iii.             128 k iv.             64K
14	In an Intel 8085 microprocessor, why is READY signal is used? i.                 To indicate that microprocessor is working and is ready for use ii.               To provide proper WAIT states when the microprocessor is communicating with a slow peripheral device. iii.             To slow down a fast peripheral device so as to communicate at the microprocessor’s device.
	iv.	None of the above.
15	ALU (Arithmetic and Logic Unit ) of 8085 microprocessor consists of………..          i.     Accumulator, temporary register, arithmetic and logic circuits

 

	ii. iii. iv.		Accumulator, arithmetic, logic circuits an		d five flags
			Accumulator, arithmetic and logic circuits
			Accumulator, temporary register, arit		hmetic, logic circuits and
		five flags
16	INTEL 8085 microprocessor was introduced in i.    1978 ii.          1976 iii.          1996 iv.          2003				……
17	The clock speed of 8085 microprocessor is …… i.               2MHz ii.            10MHz iii.          3 MHz iv.     100Mhz				……
18	There are …………..general purpose registers in i.    3 ii.         7 iii.    10 iv.         6				8085 processor
19	……..signal is used as the system clock for d microprocessor. i.                 X1,X2 ii.               CLK OUT iii.             RESET OUT iv.             ALE				evices connected with the
20	In a flag register of 8085…………….. number of i.    8 ii.          5 iii.          3 iv.          6				bits are unused
21	The vector address of TRAP interrupt is ……….. i.    002CH ii.         003CH iii.    0034H iv.         0024H
22	CPU generally contains storage device called…				……
	i.               ALU ii.            Timing control unit iii.          Counter iv.    Register
23	……….. register of 8085 is only used duri operations and not for any other purpose i.               Temporary  ii.            Acc iii.          SP iv.            B				ng arithmetic and logical
24	…….. flag bit is reset, when flag register content i.                 Sign ii.               Zero  iii.             Carry iv.             Auxiliary Carry				is D4H.
25	In 8085 microprocessor, serial data from ex				ternal device is received

 

		on……….pin i.               SID ii.            SOD iii.          HOLD iv.      READY
26		………… is a software interrupt i.                 TRAP ii.               RST 1 iii.             RST 7.5 iv.             INTR
27		……….. is a highest priority interrupt i.    RST 5.5 ii.          RST 6.5 iii.          RST 7.5 iv.          TRAP
28		……….. is a lowest  priority interrupt i.                 RST 6.5 ii.               TRAP iii.             INTR iv.             RST 5.5
29		The invalid register pair for 8085 microprocessor is……. i.    BC ii.          HL iii.          PC iv.          DE
30		The valid register pair for 8085 microprocessor is……. i.               PC ii.            SP iii.          BE iv.            BC
31		………. Pin of 8085 microprocessor is used to send data serially out i. HOLD ii.      SID iii.             SOD iv.             CLKOUT
32		There are …….. flags in 8085 i.         10 ii.      5 iii.     8 iv.     3
1		List any three primary functions of CPU of Microcomputer
2		Write any six features of 8085 Microprocessor
3		Draw functional pin diagram of 8085 microprocessor
4		Write the purpose of following pins of 8085 microprocessor

 

	a) READY  b) INTR  c) X1 , X2
5	Differentiate between I/O mapped I/O and memory mapped I/O.
6	What is an interrupt? Explain in detail.
7	Explain organization of ALU with the help of simple block diagram
8	Write the function of following registers in 8085 a) Accumulator  b) Instruction Register c) Stack pointer
9	Write the function of following pins of 8085 microprocessor a) CLKOUT     b) SID  c) ALE
10	Draw and explain programming model of 8085 Microprocessor.
11	List all the hardware interrupts according to their priority provided by 8085. Also write their vector addresses.
12	Differentiate between hardware and software interrupt.
13	Define the following terms with suitable diagram a) Instruction cycle   b)Machine cycle   c) T state
14	Write short note on subroutine in 8085 microprocessor
15	Explain multiplex address/ data ( AD0-AD7) bus in 8085 Microprocessor
16	Differentiate between maskable and non-maskable  interrupts
17	Draw labeled block diagram of Generic Microprocessor.
18	Describe the functions of following pins of 8085 microprocessor a) RESETOUT    b) HLDA     c) S0, S1
19	Explain the function of ALU with simple block diagram

 

20	What are flags in 8085? Enlist the different flags provided by 8085 microprocessor.Also draw flag register diagram
21	Explain the function of following units in microprocessor 8085. a)  ALU     b) Program Counter   c) Instruction decoder
22	Write a short note on flag register of 8085 microprocessor
23	Explain the zero and parity flags of 8085 with suitable diagram
24	What is Microprocessor? List its functions.
25	What is multiplexed address and data bus in 8085? give its advantages.
26	What is stack in 8085? List the instructions required for stack operations.
27	Explain the following flags of 8085 microprocessor a) Carry   b) Sign   c) Zero
28	In case of Microprocessor architecture, explain the following terms in brief. a) Address Bus b)      Data Bus c)      Control Bus
29	What is a Subroutine in 8085? Give its related instructions in 8085
30	Explain ALU of Generic Microprocessor.
1	Write a short note on evolutions of microprocessor giving example of each generation

 

2	Write any four functions of CPU of Microcomputer system
3	Draw a block diagram of Microcomputer system? Explain function of each block in brief.
4	Draw a neat labeled block diagram of Generic microprocessor. Explain its functional units.
5	The flag register of 8085 microprocessor contains data 45H. interpret its meaning
6	Write a short note on flag register of 8085 microprocessor .Explain the significance flag bits with one example
7	What are flags? Enlist the flags provided by 8085 Microprocessor .Explain when they are set or reset.
8	Draw a labeled functional block diagram of microprocessor 8085.
9	Explain the function of following units in microprocessor 8085 a)        Serial I/O control unit                c) Stack Pointer b)        Program counter                        d) Temporary register
10	Draw the bit pattern of flag register and explain the significance of each flag bit with one example
11	What hardware interrupts? Explain vectored and non vectored interrupts of 8085 microprocessor.
12	What is a interrupts? Differentiate between hardware and software interrupts.
13	Differentiate between maskable and Non-maskable interrupts
1	What are vectored interrupt? What are maskable and Non maskable interrupts? State all hardware interrupts of 8085 microprocessor with their priorities and vector addresses
15	What are I/O mapped I/O and Memory mapped I/O schemes? Which one 8085 uses.
16.	The flag register of 8085 microprocessor contains data 3CH. interpret its meaning

 

 

 

CHAPTER 2 – INSTRUCTION SET AND PROGRAMMING OF 8085

 

Q. No	Question
1.	The _______ flag bit is reset, when flag register content is 95 H. i. P   ii.  Z    iii.  Ac    iv. CY
2.	_________ instruction belongs to data transfer group. i.                      LHLD address ii.                    CMA           iii.                  JMP address iv.                  ANI data
3.	The instruction __________ will affect the zero flag without changing the contents of the accumulator. i.  MVI A,00    ii. SUB A  iii. XRA A          iv.        CMP A
4.	_______ instruction rotates contents of accumulator right through carry by 1 bit. i.        RAC                  ii.      RAL  iii. RAR          iv.        RRC
5.	Instruction XCHG belongs to _______ addressing mode. i.  Register   ii. Register indirect  iii. Direct           iv.        Immediate
6.	Addressing mode of ADD M is ______. i.  Direct   ii. Register Indirect   iii. Implied          iv.        Immediate
7.	_______ instruction is three byte instruction of 8085. i. CMA  ii. ADI  iii. XCHG    iv. LDA

 

8.	_______ instruction is used for 16 bit addition. i.  ADD    ii. ADI    iii. ADC           iv.        DAD
9.	The instruction MVI r, Data 8 is _______ byte instruction.   i.  Two    ii. One  iii. Three          iv.        Four
10.	During PUSH instruction of 8085 the stack pointer is _______. i.     Incremented by 2        ii.       Decremented by 2  iii.       Incremented by 1          iv.        Decremented by 1
11.	The contents of HL pair are CFFF H. After execution of instruction INX H, the contents will be _______. i. DFFF   ii. CF00  iii. CFF0          iv.        D000
12.	When ________ instruction is executed, no operation is performed; only this instruction is fetched and decoded. i.  HLT   ii.  RST 1  iii. NOP          iv.        RIM
13.	_______ flag is affected by instruction RRC of 8085. i.        Carry ii.      Zero   iii. Parity  iv. all
14.	The contents of HL pair are 2A00 H. After execution of instruction DCX H, the contents will be _______. i.  2900    ii. 29FF    iii. 1A00            iv.        1AFF
15.	Invalid register pair for 8085 microprocessor is _______. i.  SP   ii. BC   iii. HL   iv. DE

 

Q. No	Question
2.	The accumulator of 8085 microprocessor contains data F2H. What will be contents of accumulator after execution of each of the following instruction independently? a) XRI 3BH                 b) RLC            c) SUI AEH
3.	The accumulator of 8085 microprocessor contains data 3CH. What will be the effect on its content if following instructions are executed independently? a) ANI 05H                 b) RRC            c) MOV B, A
4.	Explain the register and direct addressing modes of 8085 microprocessor with example of each.
5.	Explain the following instructions with suitable example a)DAA  b) LDAX  rp  c) SHLD address
6.	Explain the following instructions with suitable example. a)RAR  b) ADC r  c) CPI data
7.	Explain the following instructions of 8085 microprocessor with suitable example a)SPHL  b) CMA   c) PUSH PSW
8.	Write appropriate instructions for each of the following tasks: a) Store the contents of accumulator to memory location pointed by BC pair.-  b ) Decrement contents of HL pair by 1. –  c) Set carry flag to 1. -
Q. No	Question
1.	Explain the following instructions with suitable example. 1.      DAA 2.      XTHL
2.	Explain following Rotate group of instructions   1.      RRC 2.      RAR 3.      RLC 4.      RAL

 

3.		What are the groups in which instructions in 8085 are classified? Give one example of each group.
4.		What do you understand by register indirect and implicit addressing modes? Explain with suitable example. List down instructions which make accumulator content clear.
5.		What are branching instructions? Explain the jumping instructions with jump conditions.
6.		The accumulator of 8085 microprocessor contains data AAH and register C contents 55H.  What will be the contents of accumulator if following instructions are executed independently? a) CMP C        b) ANA C  c) ORA C   d) SUB C
Q. No		Question
1.		Write an assembly language program to divide two 8-bit hex numbers where dividend is stored in memory location D000H and divisor is stored in memory location D001. Store  the quotient   and the reminder  in consecutive memory locations.
2.		Write an assembly language program to count number of even data bytes occurring in a block starting from the memory location 7501H to 75FFH. Store result at memory location 7600H.
	3.		Write an assembly language program to count the number of times the data AD H is found in a block starting from C000 to C00FH. Store the result at memory location D000H.
	4.		Write an assembly language program to find out 2’s compliment of five numbers stored from memory location F000H onwards. Store the result from memory address D000H.
	5.		Write an assembly language program to transfer the block of data stored from memory location D100H to D1FFH in reverse order in new memory location starting at D200H.
	6.		Write an assembly language program to divide all the
			numbers of a block by 2. Block is stored from 4000 to 4009H. Store result at the same place.
	7.		Write an assembly language program to find largest number from a block of data having starting address D001 H.  Length of block is stored in location D000H. Store the result at D060H.
	8.		Block of data is stored from memory location C050 H to C05FH. Write an assembly language program to copy entire block of data to a new location starting from C070H.
	9.		A hex number is stored at location 3000H. Write an assembly language program to interchange its digits. The new number is to be stored at 3001. Add original number with new number and store the result at location 3010H.
	10.		Write a sub routine to fill the memory locations 2000H to 2009H with data BBH and 44H alternatively.
	11.		Write an assembly language program to separate the nibbles of a number stored at memory location 2000H. Multiply the separated nibbles and store the result at memory location 3000H.
	12.		Write assembly language program to store data BCH in 20 contiguous memory locations starting from 8081H.
	13.		Write assembly language program to get decimal sum of series of numbers starts from C001H onwards. Block length is stored in C000H. Store result in C050 and carry in C051H.
	14.		Write assembly language program to subtract the number stored in memory location 3601H from the number stored in 3600H. Store the positive result at location 3602H.
	15.		Write assembly language program to add two 8 bit BCD numbers stored at memory locations 5000H and 5001H.  Store the result at memory location 5002H onwards starting with LSB.

 

 

 

 

CHAPTER 3 - Introduction to INTEL X-86 Family – 4 mark

 

 

 

 

 

1	Pentium processor has ….. bit data bus and ……bit address bus i.   64, 32       ii.        32, 64 iii.      32, 32     iv.       16, 32
2	8086 is a ……. bit processor i. 32           ii.8 iii.16           iv.64
3	The maximum physical memory can be addressed by Pentium is …… i. 16Gbytes              ii.         64 kbytes iii.       4 Gbyte                  iv. 1Mbytes
4	Which One of the following is not feature of Pentium processor ……. i.       Can address 4G bytes of memory ii.    Branch prediction iii.  32 bit data path iv. On chip caches
5	…………. Processor uses non multiplex address bus i. 8085       ii.    8086 iii.  80386  iv. 80286
6	80386 is a …….  i.             32 bit Microprocessor         ii.          16 bit Microprocessor iii.       64 bit Microprocessor iv.        8 bit Microprocessor
7	……….. Microprocessor has built in math coprocessor i.  8086      ii.    8088 iii.  80386    iv.  80486
8	The size of Accumulator in 32 bit Microprocessor is ……….. i.      16 bit          ii.                32 bit iii.              8 bit iv.              64 bit
	4 Mark

 

1	List the advanced microprocessors of INTEL X-86 family and mention three attributes of any one them.
2	Explain the main features of a Pentium Processor
3	Explain the advantage of the Pentium processor with respect to the following features a)      Dual pipelining      c) on chip caches b)      Branch prediction  d)64 bit data path
4	Explain programming model for 16 bit version of X-86 family with suitable diagram
5	Compare any four attributes of 80286 and Pentium microprocessor
6	State four differentiating features among any two X-86 family Microprocessor
7	Draw a neat labeled diagram of flag register of X-86 family
8	Draw neat labeled diagram of  flag register of 8086 family
9	Explain programming model for 32 bit version of X-86 family with suitable diagram.
10	Draw programming models of X-86 16 bit and X-86 32 bit Microprocessor
11	Compare any four attributes of 80286 and 80486
12	Compare any four attributes of 80386 and Pentium processor
13	Compare any four attributes of 80486 and Pentium processor
14	Compare any four attributes of 8086 microprocessor with Pentium processor
15	Write important features of  any two microprocessors in X-86 family in brief

 

 

Chapter 4: Introduction to Microcontroller

 

	MCQ           1 MARK
Q. No.	Question
1	8051 microcontroller IC have ______ number of 8 bit I/O ports.  i)     1          ii)        2               iii)               4             iv)               8
2	The 8051 microcontroller has instruction set of _______instructions.  i) 101    ii) 110  iii)  99       iv) 111
3	_____ is a microcontroller chip.   i) Intel 8085   ii) Intel 8086     iii) Intel 8052    iv) Intel 8008
4	8051 is a ____ bit Microcontroller.  i) 8     ii) 4     iii) 16     iv) 32
5	_________ is a Microcontroller.  i) 8086      ii) 8051       iii) 8088     iv) 80286
6	Internal data memory of a Microcontroller  is _____.  i)    128 bytes   ii)       128 k bytes    iii)       256 bytes    iv)       4 k bytes
7	_______ is a characteristic feature of 8051 Microcontroller.  i)       Four 8 bit I/O ports      ii)     Two 8 bit I/O ports      iii)      4 KB RAM    iv)        Four external Interrupts.
8	Which of the following is not a part of an 8051 single chip microcontroller?  i)       A 4 kbyte ROM                  ii)     Dual serial port   iii)          128 byte RAM

 

	iv)       Four 8 bit parallel I/O ports
9	8051 Microcontroller has clock up to _________. i) 12 MHz    ii) 4 MHz   iii) 9 MHz     iv) 6 MHz
10	The 8051 is a _____ generation microcontroller. i) First     ii) Second     iii) Third     iv) Fourth
11	The 8051 has ALU of _____ capacity. i)    64 bit  i ii)       32 bit     iii)       16 bit     iv)       8 bit
12	Internal program memory of 8052 microcontroller is _____. i)         4 byte   ii)            16 k byte     iii)      8 k byte    i iv)       64 k byte
13	__________ is not a microcontroller. i) 8052   ii) Pentium     iii) 8031     iv) 8048
14	8051 microcontroller have _______ external interrupts. i) 1       ii) 2        iii) 3                 iv)       4
1	Write any two features of following Microcontrollers:  1.                    8049        2.                    8052              3.                    8031
2	State any six features of 8051 Microcontroller
3	Explain memory register map of 8051 microcontroller with suitable diagram.
4	State three expanded features of 8052 over 8051 Microcontroller.
Q. No.	Question
5	What is microcontroller?    Write any two of its advantages over microprocessor.
6	Compare Microcontrollers 8051 and 8052 .
7	Write the RAM and ROM size of 8048, 8049 and 8050
	microcontrollers.
8	Differentiate between microcontroller and a microprocessor.
9	State any six applications of a Microcontroller.
	4 Marks Question
1	Write any two features of following Microcontrollers:  i)  8048        ii) 8052             iii)  8031           iv)  8050
2	Explain with diagram, memory register map of 8051 Microcontroller.
3	Give any eight important features of 8051 Microcontroller.
4	State and explain major features of 8051 Microcontroller.
5	Explain in detail how 8051 microcontroller addresses two separate memory spaces.
6	Discuss the microcontrollers in 8051 family.
7	What is microcontroller?  State any three advanced features of 8052 Microcontroller over 8051 microcontroller.

 

 

 

 

 

 

 

Chapter 5: Networking Technology

 

 

 

 

	MCQ - 1 MARK
Q. No.	Question
1	In _______ Topology all devices are connected to a central hub.  i) Ring     ii) Star    iii) Bus             iv)       None of the above
2	The mobile phone uses _______transmission technology.  i) Radio  ii) Microwave   iii) Infrared           iv)       Satellite
3	_______ cable uses light signals to transmit data.  i)  Fiber optic    ii) Coaxial    iii)  UTP   iv)  STP
4	If length of the cable is very long then ______ is used in between to bring the weak signal to its original level.  i)             MODEM  ii)           HUB      iii) REPEATER       iv)            ROUTER
5	_____ is an example of wireless media.  i) Optic fiber   ii) Microwave     iii) UTP   i iv)         STP
6	The installation cost of ______ cable is maximum.   i) STP      ii) UTP   iii)               Fiber optic  iv)               Co-axial
7	______cable type is ideal for connecting between two buildings.  i) UTP      ii) STP

 

	iii)               Co axial     iv)               Flat
8	If the network is to be executed beyond predefined cable limit _______ is used.  i) Modem       ii) Repeater   iii) Hub      iv) router
9	The process of modulation and demodulation is done by a device namely _______. i) Hub    ii) Repeater   iii) Router            iv)       Modem
10	All the systems on a network must follow a set of common rules called as _______. i)    Interface   ii)       Protocol   iii)       Conventions   iv)       None of the above
11	_______cable has highest sensitivity to EMI. i)       STP     ii)     Fiber optic        iii) UTP      iv) Co axial
12	BUS topologies are suitable for networks that uses _____ access methods. i) Contention based   ii) token passing   iii) polling           iv)       None of these
13	_______ does not regenerate the computer signal in networks. i) Passive hub   ii) Active hub   iii) Repeater           iv)       All the three
14	______cable type supports the greatest cable length for computer networking. i)       UTP   ii)     STP   iii)   Thick net co axial    iv)         Thin net co axial
15	_______cable has highest bandwidth. i) Fiber Optic   ii) UTP     iii) STP  i         iv)        co axial

 

16	EMI is minimum in case of   _______ cable. i) Fiber Optic   ii) UTP     iii) STP   iv)        co axial
1	Explain HUB and Repeater in detail.
2	Explain Fiber optic cable with a suitable diagram.
3	Explain the following attributes of transmission medium :    i) Bandwidth   ii)   Band usage    iii)   Attenuation.
4	Define Bus, Ring, Star topologies. Draw simple diagrams for each.
5	Explain Ring topology with diagram. State its two advantages.
6	Write a short note on STP cable with suitable diagram and give its any two characteristics.
7	What is modem?  Explain working of MODEM and specify types of MODEMS.
8	Explain UTP cable with its any four characteristics.
9	Explain co axial cable with suitable diagram and give its any two advantages.
10	Give at least two advantages and one disadvantage of wireless media over cable media.
11	List various network access methods and explain any one of them.
12	Explain the following attributes of transmission medium :    i) Installation requirement    ii)   EMI    iii)   Attenuation.
13	Enlist three types of hubs.   Write its functions in one sentence.
14	Explain function of Router in the network.  List different types of routers.
15	What is meant by protocol?  Explain concept of TCP /IP protocol.
16	Distinguish between STP and UTP cables. ( Any three points )

 

17	Differentiate between LAN and WAN. ( Any three points )
18	Enlist six characteristics of transmission media.
19	Explain STAR topology with diagram. Also give two advantages and disadvantages.
20	Compare any three characteristics of Twisted pair cable with coaxial cable.
21	What is wireless media?  Write any two advantages of wireless media.
22	Write a short note on Modem.
1	Explain any four characteristics of transmission media.
2	Explain STAR and RING Topologies with suitable diagram.
3	Explain following network devices with diagram  i) Router  ii)  Repeater
4	Explain in brief the following access method:    i) Contention     ii) Token passing
5	Explain Token passing and Polling access method.
6	Differentiate between co-axial cable and fiber optic cable.
7	What is transmission media?  Give six characteristics of transmission media.
8	What is Ethernet?  Write a short note on Ethernet.
9	Compare any four attributes of Coaxial thicknet cable with UTP cable.
10	Explain the following attributes of transmission medium :    i) Bandwidth    ii)  EMI   iii)   Band usage    iv)   Attenuation.
11	Compare any four attributes of UTP and optical fiber cable.
12	Write any two advantages and two disadvantages of optical fiber cable.
13	What is network topology? Explain in brief two basic categories of topology.