KENDRIYA VIDYALAYA NO.1, KALPAKKAM
SECOND TERM TEST – 2011-12
COMPUTER SCIENCE
Time : 1 ½ hours
CLASS XI
Max Marks : 40
Answer Script
I
Answer the following questions
8
1.
American Standard Code for Information Interchange
½
Indian Standard Code for Information Interchange
½
2.
Correct definition of one’s complement and two’s complement
3.
Correct definition
1
4.
(3CA)16
1
5.
In these printers, there is mechanical contact between the print head and
paper
The cache memory is a high speed memory available inside CPU in order to
1
6.
½½
1
speed up access to data and instructions stored in RAM memory
7.
Serial ports are often known as communication (COM) ports of RS232C
1
ports. They are typically used to connect devices like mouse and modem.
They transfers data serially a bit at a time.
8.
Nibble is a unit to measure amount of memory used. 1 Nibble = 4 bits
1
II
9.
Answer the following questions
(100110.0011010111)2 (.101100101100101)2
12
2
10. Definition, significance, example
1,½,½
11. (1E55)16
(FB6)16
12. Any two correct differences
1,1
1,1
13. Any two correct differences
1,1
14. Definition and types
1,1
III
15.
Answer the following questions
1. 01101100, 01101101
20
2. 001100, 001101
3. 00001111,
0001000
1
3
16. Correct explanation
3
17. Correct explanation
3
18. Correct Explanation of each part
3
19. Correct explanation of each part
20. Correct explaination of each part
4
4
*****
2