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Class 11 · Computer Science worksheetComputer System
CBSE Computer Science. CPU, input and output devices, memory and its units (bit to PB), buses, types of software, translators and the operating system. Every sheet has 20 questions in three sections and an answer key, and the questions change every time.
Sample questions
Real questions from this chapter, as the app sets them. Tap Answer to see the answer and working.
Section A · multiple choice
- 1.
Which part of the CPU carries out arithmetic and logical operations?
- the cache memory
- the address bus
- the control unit
- the ALU (arithmetic logic unit)
Answer
(d) the ALU (arithmetic logic unit)
- 2.
How many bytes are there in 52 MB?
- 54,525,952
- 52,000,000
- 53,248,000
- 53,248
Answer
(a) 54,525,952
52 × 1024 × 1024
- 3.
Which of these is an input device?
- monitor
- speaker
- printer
- fingerprint scanner
Answer
(d) fingerprint scanner
Section B · short answer
- 4.
Name the three main parts of a computer system and say what each does.
Answer
Input devices take in data, the CPU processes it, and output devices give out the results; memory stores the data and programs.
- 5.
Convert 75,776 TB into PB.
Answer
74 PB
75,776 ÷ 1024
Section C · long answer
- 6.
Draw and explain the block diagram of a computer system.
Answer
Input unit → CPU (ALU, control unit, registers) → output unit, with primary memory connected to the CPU and secondary storage below; arrows show data and control flow.
Fresh sheets for your child
In the app, every Computer System sheet is new: the app remembers the questions your child has already had and leaves them out. Print the sheet as a PDF, or use notebook mode and write the answers in a notebook.
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