Write the purpose of the following pin of 8085 Microprocessor:
INTR
Computer Science 2 [Official Board Paper]
Marks: 50 Maharashtra State Board
HSC Science (Computer Science)
Academic Year: 2024-2025
Date & Time: 12th July 2025, 11:00 am
Duration: 3h
HSC Science (Computer Science)
Academic Year: 2024-2025
Date & Time: 12th July 2025, 11:00 am
Duration: 3h
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- All questions are compulsory.
- Figures to the right indicate full marks.
- Use of any type of calculator not allowed.
- Draw a neat diagram wherever necessary.
[4]1. (A) | Select the correct alternative and rewrite the following:
[1]1. (A) (a)
From the following options below ______ is not vectored interrupt.
Trap
RST 7.5
RST 6.5
INTR
Concept: undefined - undefined
Chapter:
Chapter:
[1]1. (A) (a)
[1]1. (A) (b)
After execution of XTHL instruction in 8085 Microprocessor stack pointer is ________.
increased by 2
decreased by 2
remains same
increased by 1
Concept: undefined - undefined
Chapter:
Chapter:
[1]1. (A) (c)
The RAM size of 8049 microcontroller is ______.
64 bytes
128 bytes
256 bytes
512 bytes
Concept: undefined - undefined
Chapter:
Chapter:
[1]1. (A) (d)
If the network is to be extended beyond pre defined cable limit ______ is used.
Modem
Repeater
Hub
Router
Concept: undefined - undefined
Chapter:
Chapter:
[6]1. (B) | Answer any two of the following
[1]1. (B) (a) (i)
[2]1. (B) (a) (ii)
Write any four functions performed by Microprocessor.
Concept: undefined - undefined
Chapter:
Chapter:
[1]1. (B) (b) (i)
Write the purpose of the following pin of 8085 Microprocessor:
HOLD
Concept: undefined - undefined
Chapter:
Chapter:
[1]1. (B) (b) (ii)
[1]1. (B) (b) (iii)
Write the purpose of the following pin of 8085 Microprocessor:
ALE
Concept: undefined - undefined
Chapter:
Chapter:
[1]1. (B) (c) (i)
[2]1. (B) (c) (ii)
State any 4 advantages of same over microprocessor based system.
Concept: undefined - undefined
Chapter:
Chapter:
[6]2. (A) | Answer any two of the following:
[1]2. (A) (a) (i)
Considering the following point, explain the instruction INX rp:
Addressing mode
Concept: undefined - undefined
Chapter:
Chapter:
[1]2. (A) (a) (ii)
Considering the following point, explain the instruction INX rp:
Flag Affected
Concept: undefined - undefined
Chapter:
Chapter:
[1]2. (A) (a) (iii)
Considering the following point, explain the instruction INX rp:
Meaning of instruction
Concept: undefined - undefined
Chapter:
Chapter:
[0.5]2. (A) (b) (i)
What do you mean by a one-byte instruction in the 8085 Microprocessor?
Concept: undefined - undefined
Chapter:
Chapter:
[0.5]2. (A) (b) (ii)
What do you mean by a two-byte instruction in the 8085 Microprocessor?
Concept: undefined - undefined
Chapter:
Chapter:
[0.5]2. (A) (b) (iii)
What do you mean by a three-byte instruction in the 8085 Microprocessor?
Concept: undefined - undefined
Chapter:
Chapter:
[0.5]2. (A) (b) (iv)
Give one example of one byte instruction in the 8085 Microprocessor?
Concept: undefined - undefined
Chapter:
Chapter:
[0.5]2. (A) (b) (v)
Give one example of two byte instruction in the 8085 Microprocessor?
Concept: undefined - undefined
Chapter:
Chapter:
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[0.5]2. (A) (b) (vi)
Give one example of three byte instruction in the 8085 Microprocessor?
Concept: undefined - undefined
Chapter:
Chapter:
[1]2. (A) (c) (i)
Define the following characteristics of transmission media:
Band width
Concept: undefined - undefined
Chapter:
Chapter:
[1]2. (A) (c) (ii)
Define following characteristic of transmission media:
Band usage
Concept: undefined - undefined
Chapter:
Chapter:
[1]2. (A) (c) (iii)
Define the following characteristics of transmission media:
Attenuation
Concept: undefined - undefined
Chapter:
Chapter:
[4]2. (B) | Answer any one of the following:
[1]2. (B) (a) (i)
Explain the following term with respect to block diagram of Microcomputer system:
Keyboard interface
Concept: undefined - undefined
Chapter:
Chapter:
[1]2. (B) (a) (ii)
Explain the following term with respect to block diagram of Microcomputers system:
ROM
Concept: undefined - undefined
Chapter:
Chapter:
[1]2. (B) (a) (iii)
Explain the following term with respect to block diagram of Microcomputers system:
RAM
Concept: undefined - undefined
Chapter:
Chapter:
[1]2. (B) (a) (iv)
Explain the following term with respect to block diagram of Microcomputers system:
Display interface
Concept: undefined - undefined
Chapter:
Chapter:
[2]2. (B) (b) (i)
[1]2. (B) (b) (ii)
[1]2. (B) (b) (iii)
[6]3. (A) | Answer any two of the following:
[1]3. (A) (a) (i)
[1]3. (A) (a) (ii)
[1]3. (A) (a) (iii)
[3]3. (A) (b)
[1]3. (A) (c) (i)
State the function of the following register in the 8085 Microprocessor:
Accumulator
Concept: undefined - undefined
Chapter:
Chapter:
[1]3. (A) (c) (ii)
State the function of the following register in the 8085 Microprocessor:
Stack Pointer
Concept: undefined - undefined
Chapter:
Chapter:
[1]3. (A) (c) (iii)
State the function of the following register in the 8085 Microprocessor:
Program Counter
Concept: undefined - undefined
Chapter:
Chapter:
[4]3. (B) | Answer any one of the following:
[1]3. (B) (a) (i)
[1]3. (B) (a) (ii)
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[1]3. (B) (a) (iii)
[1]3. (B) (a) (iv)
[4]3. (B) (b)
How Accumulator is different than general purpose register in 8085 Microprocessor?
Concept: undefined - undefined
Chapter:
Chapter:
[6]4. (A) | Answer any two of the following:
[1]4. (A) (a) (i)
[2]4. (A) (a) (ii)
Write branching addresses of vectored hardware interrupt with their priority.
Concept: undefined - undefined
Chapter:
Chapter:
[0.5]4. (A) (b) (i)
Write the RAM size of the following Microcontroller:
8048
Concept: undefined - undefined
Chapter:
Chapter:
[0.5]4. (A) (b) (ii)
Write the RAM size of the following Microcontroller:
8051
Concept: undefined - undefined
Chapter:
Chapter:
[0.5]4. (A) (b) (iii)
Write the RAM size of the following Microcontroller:
8052
Concept: undefined - undefined
Chapter:
Chapter:
[0.5]4. (A) (b) (iv)
Write the ROM size of the following Microcontroller:
8048
Concept: undefined - undefined
Chapter:
Chapter:
[0.5]4. (A) (b) (v)
Write the ROM size of the following Microcontroller:
8051
Concept: undefined - undefined
Chapter:
Chapter:
[0.5]4. (A) (b) (vi)
Write the ROM size of the following Microcontroller:
8052
Concept: undefined - undefined
Chapter:
Chapter:
[3]4. (A) (c)
Compare any three attributes of 80286 and pentium microprocessor.
Concept: undefined - undefined
Chapter:
Chapter:
[4]4. (B) | Answer any one of the following:
[4]4. (B) (a)
If accumulator contains the data ABH and register B contains 54H. ‘What will be the contents of accumulator in hexadecimal after execution of each of the instructions dependently (Stepwise, i.e., one after another.
ANA BCMACMP BANI OOH
Concept: undefined - undefined
Chapter:
Chapter:
[4]4. (B) (b)
Draw and label programming model of 80286 Microprocessor.
Concept: undefined - undefined
Chapter:
Chapter:
[10]5. | Answer any two of the following:
[5]5. (a)
‘Write an Assembly Language program to divide the data at location 9900H by the data stored at location 9901H. Storc thc quotient and remainder in 9902H and 9903H memory locations respectively.
Concept: undefined - undefined
Chapter:
Chapter:
[5]5. (b)
Write an Assembly Language Program to count the number of times data 9DH is found in block of memory locations starting from 8901H. Length of the block is stored in memory location 8900H. Store the result in memory location 8000H.
Concept: undefined - undefined
Chapter:
Chapter:
[5]5. (c)
A 16 bit number beginning with lower order byte is stored from memory location 7000H. Write a Assembly Language Program to find its two’s (2’s) compliment and stare the result beginning with lower order byte from memory location 7500H.
Concept: undefined - undefined
Chapter:
Chapter:
OR
[10]5. | Answer any two of the following:[5]5. (a)
Write an Assembly Language Program to find one’s (1’s) compliment of a number stored at memory location D000H without using CMA instruction and store result at memory location D00IH.
Concept: undefined - undefined
Chapter:
Chapter:
[5]5. (b)
Write an Assembly Language Program to check whether fourth and fifth bits of a hexadecimal number stored in memory location DICH is logicalone then store 00H else FFH of memory location D90IH.
Concept: undefined - undefined
Chapter:
Chapter:
[5]5. (c)
Write an Assembly Language Program to copy a block of data stored in memory location from D100H to D10FH in new memory location starting of E100H.
Concept: undefined - undefined
Chapter:
Chapter:
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Previous year Question paper for Maharashtra State Board 12th Standard Board Exam Computer Science 2-2025 is solved by experts. Solved question papers gives you the chance to check yourself after your mock test.
By referring the question paper Solutions for Computer Science 2, you can scale your preparation level and work on your weak areas. It will also help the candidates in developing the time-management skills. Practice makes perfect, and there is no better way to practice than to attempt previous year question paper solutions of Maharashtra State Board 12th Standard Board Exam.
How Maharashtra State Board 12th Standard Board Exam Question Paper solutions Help Students ?
• Question paper solutions for Computer Science 2 will helps students to prepare for exam.
• Question paper with answer will boost students confidence in exam time and also give you an idea About the important questions and topics to be prepared for the board exam.
• For finding solution of question papers no need to refer so multiple sources like textbook or guides.
