HSC Science (Computer Science) 12th Board ExamMaharashtra State Board
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Question Paper Solutions - Computer Science 2 2016 - 2017 HSC Science (Computer Science) 12th Board Exam

SubjectComputer Science 2
Year2016 - 2017 (March)

Marks: 50
[10]1
[4]1.1 | Select correct options and rewrite the following :
[1]1.1.1

The flag register of 8085 microprocessor contains_____flags.

(i)   8 
(ii)  3
(iii) 7
(iv) 5

Chapter: [1] Introduction to Microprocessors and Organization of 8085
Concept: Introduction to Microprocessors and Organization of 8085
[1]1.1.2

ANA, r instruction comes under ____ group

(i) Arithmetic
(ii) Logical
(iii) Branch
(iv) Data Transfer

Chapter: [2] Instruction Set and Programming of 8085
Concept: Instruction Set and Programming of 8085
[1]1.1.3

The maximum physical memory can be addressed by 80286  microprocessor Is _____

(i)  640 KB
(ii) 1 MB
(iii)16 MB
(iv)4 KB

Chapter: [3] Introdcution to Inted X-86 Family
Concept: Introdcution to Intel X-86 Family
[1]1.1.4

______cable uses light signals to transmit data.

(i)  Fiber Optic
(ii) Coaxial
(iii) UTP
(iv) STP

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

Explain Multiplexed Address and Data Bus of 8085 MPU.

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

Explain functions of the following pins of 8085 Microprocessor : RST 6.5

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

Explain functions of the following pins of 8085 Microprocessor : CLK (OUT)

Chapter: [2] Instruction Set and Programming of 8085
Concept: Instruction Set and Programming of 8085
[3]1.2.2

Write the addressing mode and length in bytes of the following instructions :

(i) CPI 10 H
(ii) MOV M, B
(iii) SHLD C009 H

Chapter: [1] Introduction to Microprocessors and Organization of 8085
Concept: Introduction to Microprocessors and Organization of 8085
[3]1.2.3

Compare Twisted Pair Cable and Coaxial Cable

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

Explain the following

T-States

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

Explain the following

Machine Cycle

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

Explain the following : Instruction Cycle

Chapter: [2] Instruction Set and Programming of 8085
Concept: Instruction Set and Programming of 8085
[3]2.1.2

What is Wireless Media ?

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

The accumulator in 8085 microprocessor contains data 71H and register E contains data 39H. What will be the contents of an accumulator in  Hexadecimal after execution of the following  instructions independently ?

(i) ADD E
(ii) ORA E
(iii) RRC

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

What is Microcontroller?

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

State any three advanced features of 8052 microcontroller over 8051 microcontroller.

Chapter: [4] Introduction to Microcontroller
Concept: Introduction to Microcontroller
[4]2.2.2

What is an Vectored Interrupt? 

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

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

Chapter: [1] Introduction to Microprocessors and Organization of 8085
Concept: Introduction to Microprocessors and Organization of 8085
[10]3
[6]3.1 | Solve any two of the following :
[3]3.1.1

Write any three difference points between Memory Mapped I/0 and
I/O Mapped I/0 Addressing Scheme.

Chapter: [1] Introduction to Microprocessors and Organization of 8085
Concept: Introduction to Microprocessors and Organization of 8085
[3]3.1.2

Explain the following instructions of 8085 Microprocessor with one
example of each : PUSH PSW

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

Explain the following instructions of 8085 Microprocessor with one
example of each : INX rp

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

Explain the following instructions of 8085 Microprocessor with one
example of each : DAD rp

Chapter: [2] Instruction Set and Programming of 8085
Concept: Instruction Set and Programming of 8085
[3]3.1.3

Write a short note on MODEM.

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

Write any two features of following Microcontrollers : 8048

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

Write any two features of following Microcontrollers : 8052

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

Write any two features of following Microcontrollers : 8031

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

Write any two features of following Microcontrollers : 8050

Chapter: [4] Introduction to Microcontroller
Concept: Introduction to Microcontroller
[4]3.2.2

Write a note on Ethernet.

Chapter: [5] Networking Technology
Concept: Networking Technology

Discuss different types of Ethernet.

Chapter: [5] Networking Technology
Concept: Networking Technology
[10]4
[6]4.1 | Solve any two of the following : .
[3]4.1.1

Compare any three attributes of 80386 and 80486 Microprocessor

Chapter: [3] Introdcution to Inted X-86 Family
Concept: Introdcution to Intel X-86 Family
[3]4.1.2

Write any three instructions to make Accumulator Zero

Chapter: [2] Instruction Set and Programming of 8085
Concept: Instruction Set and Programming of 8085
[3]4.1.3

What is Microprocessor ?

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

List functions of Microprocessor.

Chapter: [1] Introduction to Microprocessors and Organization of 8085
Concept: Introduction to Microprocessors and Organization of 8085
[4]4.2 | Solve any one of the following :
[4]4.2.1

Write a function of following functional units of 8085 Microprocessor : Instruction Decoder

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

Write a function of following functional units of 8085 Microprocessor : General Purpose Register

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

Write a function of following functional units of 8085 Microprocessor : Data/Address Buffer

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

Write a function of following functional units of 8085 Microprocessor : Status -Register

Chapter: [1] Introduction to Microprocessors and Organization of 8085
Concept: Introduction to Microprocessors and Organization of 8085
[4]4.2.2

What is Transmission Media ?

Chapter: [5] Networking Technology
Concept: Networking Technology

Explain in short six characteritics of Transmission Media.

Chapter: [5] Networking Technology
Concept: Networking Technology
[10]5 | Solve any one of the following :
[10]5.1 | Solve any two of the following :
[5]5.1.1

Write a Assembly Language Program to copy a block of data having starting address 4500 H to new location starting from 4600 H. The length of block is stored at memory location 44FF H.

Chapter: [2] Instruction Set and Programming of 8085
Concept: Instruction Set and Programming of 8085
[5]5.1.2

Write an Assembly Language Program to add two 8-bits BCD numbers stored at memory location 4500 Hand 4501 H. Store the two byte BCD result from memory location· 4502 H onwards.

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

Write an Assembly Language Program to fill the memory locations 4500H to 4504 with the Hexadecimal numbers 09 H to ODH respectively.

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

Write an Assembly Language Program to exchange the nibbles of 8-bit number stored in memory location 4500H. Store the result at memory location 4501H.

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

A block of data is stored in memory location 4500 H. The length of block is stored in memory location 44FFH. Write Assembly Language Program that searches for the first occurrence of data D9H in given block. Store the address of this occurrence in H.L. pair. If the number is not found then HL. pair should contain 5000 H.

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

A block of data is stored from memory location 4501H and onwards. The length of the block is stored at memory location 4500H. Write an  Assembly Language Program to fmd the sum of block of data. Store the two byte result from memory location 4600 H.

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