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Computer Science 2 2014-2015 HSC Science (Computer Science) 12th Board Exam Question Paper Solution

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Computer Science 2
Marks: 50Academic Year: 2014-2015
Date: March 2015

[10]1
[4]1.1 | Select correct options and rewrite the following
[1]1.1.1

______Instruction would not affect Zero Flag.

(i) XRA A

(ii) SUB A

(iii) CMPA

(iv) MVI A, 00H

Concept: Instruction Set and Programming of 8085
Chapter: [2] Instruction Set and Programming of 8085
[1]1.1.2

Data bus of 80286 MPU is of size_____

(i) 8 bit

(ii) 16 bit

(iii) 32 bit

(iv) 64 bit

Concept: Introdcution to Intel X-86 Family
Chapter: [3] Introdcution to Inted X-86 Family
[1]1.1.3

_____is used to store 8 bit opcode in 8085.

(i) IR

(ii) PC

(iii) SP

(iv) Accumulator

Concept: Introduction to Microprocessors and Organization of 8085
Chapter: [1] Introduction to Microprocessors and Organization of 8085
[1]1.1.4

The device used to extend cable length of a network is______.

(i) MODEM

(ii) REPEATER

(iii) HUB

(iv) ROUTER

Concept: Networking Technology
Chapter: [5] Networking Technology
[6]1.2 | Solve any two of the following
[3]1.2.1

Draw block diagram of Generic Microprocessor.

Concept: Introduction to Microprocessors and Organization of 8085
Chapter: [1] Introduction to Microprocessors and Organization of 8085
[3]1.2.2

State any six features of 8051 Microcontroller.

Concept: Introduction to Microcontroller
Chapter: [4] Introduction to Microcontroller
[3]1.2.3

What is HUB ? Explain all the types of HUB.

Concept: Networking Technology
Chapter: [5] Networking Technology
[10]2
[6]2.1 | Solve any two of the following
[3]2.1.1

Explain Multiplexed Address and Data Bus of 8085 MPU.

Concept: Introduction to Microprocessors and Organization of 8085
Chapter: [1] Introduction to Microprocessors and Organization of 8085
[3]2.1.2

Explain in short Bus Topology

Concept: Networking Technology
Chapter: [5] Networking Technology

Explain in short Star Topology

Concept: Networking Technology
Chapter: [5] Networking Technology
[3]2.1.3

State any six Arithmetical and Logical Instructions of 8085 MPU.

Concept: Instruction Set and Programming of 8085
Chapter: [2] Instruction Set and Programming of 8085
[4]2.2 | Solve any one of the following
[4]2.2.1

State the different hardware interrupts with their priorities and branching addresses.

Concept: Introduction to Microprocessors and Organization of 8085
Chapter: [1] Introduction to Microprocessors and Organization of 8085
[4]2.2.2
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[1]2.2.2.1

Explain the following instructions of 8085 MPU: MOV B, M

Concept: Instruction Set and Programming of 8085
Chapter: [2] Instruction Set and Programming of 8085
[1]2.2.2.2

Explain the following instructions of 8085 MPU : ADC C

Concept: Instruction Set and Programming of 8085
Chapter: [2] Instruction Set and Programming of 8085
[1]2.2.2.3

Explain the following instructions of 8085 MPU : SPHL

Concept: Instruction Set and Programming of 8085
Chapter: [2] Instruction Set and Programming of 8085
[1]2.2.2.4

Explain the following instructions of 8085 MPU : XCHG

Concept: Instruction Set and Programming of 8085
Chapter: [2] Instruction Set and Programming of 8085
[6]3
[6]3.1 | Solve any two of the following
[3]3.1.1

What is a Single Chip Computer ? State its advantages

Concept: Introduction to Microcontroller
Chapter: [4] Introduction to Microcontroller
[3]3.1.2

Explain the advantages of following features of Pentium Processor
(i) Dual - Pipelining
(ii) Pre fetching
(iii) Branch Prediction
(iv) Internal Data Bus

Concept: Introdcution to Intel X-86 Family
Chapter: [3] Introdcution to Inted X-86 Family
[3]3.1.3

Write a note on Ethernet.

Concept: Networking Technology
Chapter: [5] Networking Technology
[4]3.2 | Solve any one of the following
[4]3.2.1

Explain PUSH and POP Instructions of 8085

Concept: Instruction Set and Programming of 8085
Chapter: [2] Instruction Set and Programming of 8085
[4]3.2.2

Explain any four flags of 8085, giving example

Concept: Introduction to Microprocessors and Organization of 8085
Chapter: [1] Introduction to Microprocessors and Organization of 8085
[6]4
[6]4.1 | Solve any two of the followig
[3]4.1.1
[1]4.1.1.1

Explain function of the following pins of 8085

`bar(INTA)`

Concept: Introduction to Microprocessors and Organization of 8085
Chapter: [1] Introduction to Microprocessors and Organization of 8085
[1]4.1.1.2
 

Explain function of the following pins of 8085

`IO"/"barM`

 
Concept: Introduction to Microprocessors and Organization of 8085
Chapter: [1] Introduction to Microprocessors and Organization of 8085
[1]4.1.1.3
 

Explain function of the following pins of 8085 RD

 
Concept: Introduction to Microprocessors and Organization of 8085
Chapter: [1] Introduction to Microprocessors and Organization of 8085
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[3]4.1.2

State any six applications of Microcontrollers

Concept: Introduction to Microcontroller
Chapter: [4] Introduction to Microcontroller
[3]4.1.3

Compare Twisted Pair Cable and Coaxial Cable

Concept: Networking Technology
Chapter: [5] Networking Technology
[4]4.2 | Solve any one of the following
[4]4.2.1
[1]4.2.1.1

Explain the following

T-States

Concept: Instruction Set and Programming of 8085
Chapter: [2] Instruction Set and Programming of 8085
[1]4.2.1.2

Explain the following

Machine Cycle

Concept: Instruction Set and Programming of 8085
Chapter: [2] Instruction Set and Programming of 8085
[1]4.2.1.3

Explain the following : Instruction Cycle

Concept: Instruction Set and Programming of 8085
Chapter: [2] Instruction Set and Programming of 8085
[1]4.2.1.4

Explain the following : FETCH Cycle

Concept: Instruction Set and Programming of 8085
Chapter: [2] Instruction Set and Programming of 8085
[4]4.2.2

Give advantages of Fiber Optic Cable over an Electrical Cable.

Concept: Networking Technology
Chapter: [5] Networking Technology
[10]5 | Attempt any One
[10]5.1 | Answer any two of the following
[5]5.1.1

Write ALP to multiply number stored at 8085H by 09H and store result at 8086H and 8087H, with lower byte at 8086H.

Concept: Introduction to Microprocessors and Organization of 8085
Chapter: [1] Introduction to Microprocessors and Organization of 8085
[5]5.1.2

Write ALP to find 2's complement of a 16 bit number stored in DE Pair. Store result in HL Pair.

Concept: Instruction Set and Programming of 8085
Chapter: [2] Instruction Set and Programming of 8085
[5]5.1.3

Locate smallest number in a block from 2050H to 2060H and store it in memory location 2061H

Concept: Instruction Set and Programming of 8085
Chapter: [2] Instruction Set and Programming of 8085
[10]5.2 | Solve any two of the following
[5]5.2.1

Write ALP to store data BCH in 20 contiguous memory locations starting from 8081 H.

Concept: Instruction Set and Programming of 8085
Chapter: [2] Instruction Set and Programming of 8085
[5]5.2.2

Write ALP to divide number at 6068H by a non-zero number at 6067H. Store quotient at 6069H and remainder at 606AH.

Concept: Instruction Set and Programming of 8085
Chapter: [2] Instruction Set and Programming of 8085
[5]5.2.3

Write ALP to clear Register ,B, if number at memory location 20F9H is Palindrome; otherwise store FFH in Register B.

[Palindrome No. Ex. FF, 22, AA]

Concept: Instruction Set and Programming of 8085
Chapter: [2] Instruction Set and Programming of 8085
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