Solved Question Paper : BCA 1st Sem MDC-1 Sessional Exam-2024

Sessional Examinations 2024

Class: BCA 1st Sem

Subject: MDC-1

Information & communications technology

Total Time: 1 hour

Total Marks: 20

1) Write very short answers: 1×4=4

a) Name the hardware used in third generations of computers.

Answer: Integrated Circuits (ICs) were used as hardware in the third generation of computers.

b) Give two examples of Operating Systems.

Answer: Windows and Linux.

c) Write two qualities of a good software.

Answer: 1. Usability And 2. Reliability

d) Write the full form of CPU.

Answer: Central Processing Unit.

2) Define the following terms: 3

Answer: ISP: Internet Service Provider, a company that provides internet access to individuals and organizations.

Answer: ICT: Information and Communication Technology, a broad term that includes technologies used for communication, such as computers and the internet.

Answer: RAM: Random Access Memory, a type of computer memory that is used for storing data temporarily while the computer is running.

b) Briefly explain various generations of computers. 3

Answer:

1. First Generation (1940-1956): Used vacuum tubes for circuitry and magnetic drums for memory. These computers were large, slow, and expensive.

2. Second Generation (1956-1963): Used transistors instead of vacuum tubes, which made them smaller, faster, and cheaper.

3. Third Generation (1964-1971): Used integrated circuits (ICs) which further reduced size and cost and increased speed.

4. Fourth Generation (1971-present): Use microprocessors, which integrate thousands of ICs into a single chip, making computers even smaller and more powerful.

5. Fifth Generation (present and beyond): Focuses on artificial intelligence and machine learning, with computers that can learn and adapt.

3) Convert the following numbers: 3×2=6

a) (23.25)₁₀ = (?)₂

Answer:

Calculations 1 :

    23 ÷ 2 = 11 remainder 1
    11 ÷ 2 = 5  remainder 1
    5  ÷ 2 = 2  remainder 1
    2  ÷ 2 = 1  remainder 0
    1  ÷ 2 = 0  remainder 1
    

Reading the remainders from bottom to top, we get 10111_₂.

Calculations 2 :

    0.25 × 2 = 0.5 (whole part 0)
    0.5  × 2 = 1.0 (whole part 1)
    

Since we reached 0, we stop here. The binary representation of 0.25 is 01_₂.

Combining both parts, we have:

(23.25)₁₀ = (10111.01)_₂

b) (25.50)₁₀ = (?)₈

Answer:

Calculations 1 :

    25 ÷ 8 = 3 remainder 1
    3  ÷ 8 = 0 remainder 3
    

Reading the remainders from bottom to top, we get 31_₈.

Calculations 2 :

    0.50 × 8 = 4.0 (whole part 4)
    

Since we reached 0, we stop here. The octal representation of 0.50 is 4_₈.

Combining both parts, we have:

(25.50)₁₀ = (31.4)_₈

4) Write short notes on (any one): 4

a) Components of a computer system.

Answer:

1. Central Processing Unit (CPU): The brain of the computer, responsible for executing instructions.

2. Memory (RAM and Storage): RAM stores data temporarily, while storage (like hard drives) stores data permanently.

3. Input Devices: Devices like a keyboard and mouse that allow users to interact with the computer.

4. Output Devices: Devices like monitors and printers that display or produce the result of computer operations.

b) Storage systems of computers.

Answer: Computer storage can be classified into two types:

1. Primary Storage: This includes volatile memory like RAM, which temporarily stores data while the computer is running.

2. Secondary Storage: Non-volatile storage like hard drives, SSDs, and USB drives, which permanently store data.