IX Computer Studies

SECTION “A” – (Multiple Choice Questions)

Q.1. It consists of 15 Multiple Choice Questions (MCQs). Each question is given four options, the correct answer to be selected from the given options. All questions are to be answered in this Section.

SECTION “B” – (Short Answer Questions)

Q.2. Answer any NINE questions from this Section. All questions carry equal marks.

i. Solve the following

(a) (11010)₂ = (?)₁₀
(b) (1803)₁₀ = (?)g
(c) (735)₈ = (?)₁₀
(d) (2800)₁₀ = (?)₁₆

ii. Convert the given decimal numbers to their binary equivalents.

(a) 79
(b) 167
(c) 256
(d) 1023

iii. What is an operating system.

OR

Describe the properties of windows operating system.

iv. What are language translators? Explain each of them.

v. Convert the following numbers to their equivalent numbers in the given bases.

(a) (11111011)₂ = (?)₁₀
(b) (467)₁₀ = (?)₂
(c) (1046)₁₀ = (?)₂
(d) (673)₈ = (?)₁₀
(e) (987)₁₀ = (?)₈
(f) (733)₁₀ = (?)₈
(g) (ABC)₁₆ = (?)₁₀
(h) (4CA)₁₆ = (?)₁₀
(i) (999)₁₀ = (?)₁₆
(j) (634)₁₀ = (?)₁₆

vi. Define monitors and its types.

OR

Describe Mouse and light pen.

OR

Define a dual purpose device. Describe Disk Drive and CD writer.

OR

What is the purpose of main memory?

vii. Solve the following binary numbers.

(a) 1111101₂ + 100110₂ = (?)₂
(b) 1101111₂ – 101101₂ = (?)₂
(c) 1101011₂ = 100001₂ = (?)₂
(d) 1000011₂ + 11110111₂ = (?)₂
(e) 111011₂ x 111₂ = (?)₂

viii. Define term buses. What is the purpose of buses?

OR

Define ports and describe its types.

OR

What are the difference between RAM and ROM?

OR

What are input devices? Enlist input devices?

ix. What are the characteristics of the 2nd generation of computer.

OR

Define Analog and Digital computers.

OR

Differentiate between an Analog and Digital computers.

OR

Define the term of computers.

x. Write a short note on internet.

OR

What is Software? Describe different types of software.

OR

Differentiate between software and hardware.

OR

Write short note on the following.

• Mini Computer
• Micro Computer

xi. Solve the following binary numbers.

(a) 101111 + 110011
(b) 111001 – 10111
(c) 1110 x 10
(d) 10101100 (2′s complement)

xii. Prove the following equation and also draw the truth table (A + B) (A + C) = A + BC.

OR

Construct the following Truth Table of De-Morgan’s Theorem and check it.

xiii. What is the difference between internal command and external command.

OR

Define a Backing Storage Device and describe any two of them.

OR

Define Various types of data?

OR

Differentiate between Data and Information.

SECTION “C” – (Descriptive Questions Answer)

NOTE: Attempt any TWO question from this Section. All questions carry equal marks.

Q.3. (a) What is the difference between a compiler and interpreter?
Q.3. (b) Define typical components of CPU and also draw the Generation Table.

OR

What are the wild card characters? Why they are used?

OR

How can you install a printer?

Q.4. (a) What is number system? Describe the different types of number systems used in the computer system.
Q.4. (b) How many laws are in Boolean Algebra and also define various type of law?

OR

Differentiate between application software and a system software?

OR

Define the properties of windows operating system?

Q.5. (a) What is magnetic disk and define differentiate types of magnetic disk?
Q.5. (b) Define Printer and its types?

OR

Differentiate between Mouse and Track ball.

OR

Describe Impact and Non-Impact printers. Give examples.

OR

Define keyboard and state its divisions.

Q.6. (a) Describe the generations of computer also draw the Generation Table.
Q.6. (b) Describe Low-level and High-level languages.

OR

Discuss the advantages and disadvantages of Machine Language?

OR

What is a computer virus? How is a virus removed from disk?