KENDRIYA VIDYALAYA CHENNAI REGION

KENDRIYA VIDYALAYA NO.1, KALPAKKAMFIRST TERM TEST 2011-12COMPUTER SCIENCE

Time : 1 hours CLASS XI Max Marks : 40

General Instructions A. All questions are compulsory B. This question paper consists of 2 pages. C. Indent the programs appropriately

IAnswer the following questions10

1Differentiate between primary memory and secondary memory.1

2What is an operating system?1

3Write the DOS command to 1. To display the contents of a text file (with syntax and example).2. To delete a directory (with syntax and example).11

4Explain the following DOS commands with an example.1. CD2. COPY CON3. RENAME111

5Storage of 1 KB means the following number of bytes : 1) 1000 2) 964 3) 1042 4) 1024 1

6What is task bar?1

7What do you mean by application software?1

IIAnswer the following questions10

8Expand the following: i)CPU ii) ROM iii)MICR iv)CD-R 2

9State any two differences between compiler and interpreter.2

10Write differences between Internal DOS Commands and External DOS Commands.2

11Write a short note on Napiers logs and Bones. 2

12State two characteristics of each second generation computer and fourth generation computers. 2

IIIAnswer the following questions20

13Explain different states of process?3

14What do you mean by Software? Explain different types of software.3

15Explain micro computers and mini computers.3

16What do you mean by input and output devices? Explain each with example.3

17What do you mean by process scheduling? Explain FCFS scheduling.4

18With a neat block diagram explain the working of computer. Explain the four units of computer in brief.4

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