Class 11 · Informatics Practices worksheet

Computer System

CBSE Informatics Practices. Components and buses, input and output devices, memory units from bit to petabyte, RAM, ROM, cache and secondary memory, system and application software, compilers and interpreters. Every sheet has 20 questions in three sections and an answer key, and the questions change every time.

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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.
The part of a computer that carries out arithmetic and logical operations is the:
1. cache
2. hard disk
3. control unit
4. ALU (arithmetic logic unit)
Answer
(d) ALU (arithmetic logic unit)
2.
How much is 11,534,336 bytes in MB?
1. 11 MB
2. 22 MB
3. 12 MB
4. 11,534 MB
Answer
(a) 11 MB
each unit is 1024 of the one below it: 11,534,336 ÷ 1024 ÷ 1024
3.
A microphone is which kind of device?
1. storage
2. output
3. input
4. processing
Answer
(c) input
input devices send data in; output devices show or give the result

Section B · short answer

4.
What is a computer system? Name its main components.
Answer
A computer with its hardware and software working together; its main parts are the CPU, memory, input devices, output devices and storage, joined by buses.
5.
Convert (a) 2 TB into GB (b) 2 TB into MB.
Answer
(a) 2,048 GB; (b) 2,097,152 MB
× 1024; × 1024 again

Section C · long answer

6.
Describe the stored-program (von Neumann) architecture of a computer with the role of each part.
Answer
Input devices send data in; the CPU (ALU for calculations, control unit to direct the steps, registers for quick storage) processes it; memory holds both the program and the data; output devices give results; buses connect all parts.

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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More Class 11 Informatics Practices

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