Computer Science 2 2017-2018 HSC Science (Computer Science) 12th Standard Board Exam Question Paper Solution

Intel 8085 is a/an ______ bit Microprocessor

(i) 16

(ii) 4

(iii) 8

(iv) 32

The instruction PCHL belongs to _______ group.

(i) Data transfer

(ii) Logical

(iii) Arithmetic

(iv) Branching

Stack pointer of 8085 holds _________.

(i) 8 bit address

(ii) 16 bit data

(iii) 16 bit address

(iv) 8 bit data

The instruction set of intel 8051 Micro-controller contains total _________ instruction.

(i) 111

(ii) 72

(iii) 74

(iv) 100

Explain the given function of pins on Intel 8085

`bar(RD)`

Explain the given function of pins on Intel 8085

`bar(WR)`

Explain the given function of pins on Intel 8085

IO/`barM`

Explain direct and immediate addressing modes of Intel 8085 with suitable examples.

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

Write the RAM and ROM size of 8048, 8049 and 8050 Microcontrollers

Explain the structure of Fiber Optic Cable.

Explain the conditional CALL instructions of Intel 8085.

Draw the labelled internal block diagram of 8085 Microprocessor

Explain in brief the following access method :

Contention

Explain in brief the following access method:

Token Passing

What do you mean by Interrupt?

List all the software interrupts of Intel 8085.

The Registers A and C of 8085 contain the data E2H and 47H. What will be the contents of Accumulator in Hex digits after execution of each of the following instructions independently?

1) SUB C

2) XRA C

3) ADD C

Draw a bit pattern of flag register of Intel 8085 and write the functions of any four flags.

Explain in brief the following connectivity devices :

Repeater

Explain in brief the following connectivity devices:

Router

Explain the following

Machine Cycle

Explain the following : Instruction Cycle

Explain the following

T-States

Explain the function of following instructions of Intel 8085:

L x I H, 2900 H

Explain the function of following instructions of Intel 8085 :

LDA 6605 H

Explain the function of following instructions of Intel 8085 :

PUSH B

Explain the function of ALU with a simple block diagram.

What is a Protocol ? Explain the concept of TCP/IP Protocol.

What is Microcontroller?

State any six features of 8051 Microcontroller.

Explain in short Ring Topology. 

Explain in short Star Topology

Write an Assembly Language Program to multiply an 8-bit number stored at 4301H by another 8- bit number stored at 4302H. Store the result at the location 4303H and 4304H beginning with a LOB. (Lower Order Byte)

Write an Assembly Language Program to fill in the memory locations starting from 6900H an onward with the decimal numbers 0 to 99.

Write an Assembly Language Program to take the 2's complement of an 8-bit number stored at 3301H. Store the result at the memory location 3302H

Write an Assembly Language Program to count the occurrence of the data byte ACH in a memory Nock stored from 7401H to 7405H. Store the count at the memory location 7406H.

Write a subroutine in assembly language to fill the memory locations 7301H to 73FFH with the hexadecimal numbers 01H to FFH respectively

Write an Assembly Language Program to count the total number of even data bytes occurring in a block of data stored from 9201H to 920AH. Store the result (count) at the memory location 9500H.