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University of Barishal

Department of Computer Science and Engineering

Final Exam

Course Title: Introduction to Computer Systems (CSE-1101)

Semester: 1st | Session: 23-24

Time: 180 minutes | Marks: 60.00

Course Teacher: Md Mahbub E Noor

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Answer any Five Questions from the followings.

1.

a)

Briefly describe the basic functions performed by a computer with the help of a simple diagram.

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3 Marks
b)

What are the classifications of computers on the basis of size and capability? Differentiate among them.

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5 Marks
c)

How do general purpose computers differ from special purpose computers?

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2 Marks
d)

List different categories of input and output devices.

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2 Marks
2.

a)

Write short note on the following terms:

i) RAM   ii) ROM   iii) Cache memory   iv) Register memory

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8 Marks
b)

Describe the way of storing information in the memory of a computer system, with the help of a diagram.

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2 Marks
c)

Suppose you are doing addition of two numbers 'a' and 'b' in a computer system. The result of them is 'c'. It means c = a+b. Now, name the register memories used to store that 'a', 'b' and 'c'.

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2 Marks
3.

a)

What do you understand by computer architecture? Is it same as computer organization? If no, explain the difference between the two.

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1 Marks
b)

What is machine cycle? Describe it briefly?

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4 Marks
c)

Explain the importance of bus in the computer system. What are the different types of buses usually found in the computer system?

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2 Marks
d)

What is the difference between memory read and memory write operations? Explain the internal communication of processor to memory in the computer system.

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5 Marks
4.

a)

What is positional number systems? Explain why does computer system do its arithmetic and logical calculation in binary number system?

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3 Marks
b)

Do the following conversions:

i) (420.13)10 = (?)8      ii) (420.13)8 = (?)16

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3 Marks
c)

Perform the following operation:

(97AB)16 ÷ (7A)16 = (?)16 = (?)10

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3 Marks
d)

Perform the binary subtraction of the following using two's complement method.

(-63)10 - (127) 10 = (?)2 = (?)10

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3 Marks
5.

a)

Explain the Boolean logic and logic gates.

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2 Marks
b)

Reduce the following expressions using K-map:

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6 Marks
c)

Simplify the following Boolean expression and also draw its diagram:

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4 Marks
6.

a)

What is spreadsheet? Write down some features and applications of spreadsheet.

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4 Marks
b)

Given below is a Venn diagram for three variables A, B and C. Indicate the regions depicted by the following expressions:

i) A+BC

ii) (A+B)(A+C)

iii) A'BC

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6 Marks
c)

How does a Modem work for the purpose of data communication?

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2 Marks
7.

a)

What is software? Write the difference between application and system software.

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4 Marks
b)

Write short note on any four of the followings:

i. Operating system

ii. Utility programs

iii. Computer virus

iv. Network topologies

V. Internet and intranet.

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8 Marks
8.

a)

What do understand by programming languages? Write some features and applications of C language.

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3 Marks
b)

Differentiate between compiler and interpreter.

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3 Marks
c)

Differentiate between low-level and high-level languages. C is in what kind?

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3 Marks
d)

Write a basic C program to check whether a number is odd or even using a user-defined function to perform the calculation. Draw a flow chart of the coding as well.

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3 Marks
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Contributors of this Question:

Role Name Date
Prepared By (Teacher): Md Mahbub E Noor N/A
Uploaded By: Israt Jahan May 14, 2025, 3:05 p.m.
Converted By (Img/PDF to Text): Baishakhi Bir Dec. 20, 2025, 12:22 a.m.
Reviewed By: Obaydul Hasan Nayeem Dec. 20, 2025, 8:17 p.m.
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