Page 68 - Computer Science Class 11 Without Functions
P. 68
B. State whether the following statements are True or False:
1. Octal numbers have a base value of 8. __________
2. Only the decimal number system can be used to represent the decimal numbers. __________
3. The right-most digit is the least significant digit of the given number. __________
4. All character codes of ASCII are retained in ISCII. __________
5. UNICODE is a universal coding scheme. __________
C. Fill in the blanks.
1. The leftmost bit of a decimal number is known as __________.
2. The decimal equivalent of (A) is __________.
16
3. An octal digit may be represented using __________ binary digits.
4. UTF-8 uses minimum __________ byte(s) to encode characters.
5. ASCII is used to encode characters in __________ language.
D. Answer the following questions:
1. Give an application of the hexadecimal number system.
2. Why are RGB codes expressed as hexadecimal numbers?
3. Why was UNICODE developed?
4. Give one advantage of UNICODE.
5. Give full form of the following acronyms:
ASCII, ISCII, UTF
6. Convert the following decimal numbers into their equivalent binary numbers.
a. 256 b. 39.56 c. 508.8
7. Convert the following octal numbers into their equivalent decimal numbers.
a. 5063 b. 17.52 c. 327
8. Convert the following decimal numbers into their equivalent hexadecimal numbers.
a. 7208 b. 93.5 c. 199.60
9. Convert the following hexadecimal numbers into their equivalent decimal numbers.
a. 7C6 b. 95.A c. ABC.D
10. Convert the following binary numbers into their equivalent hexadecimal numbers.
a. 1110001110 b. 10101010 c. 1100.01
11. Convert the following decimal numbers into their equivalent binary numbers.
a. 245.8 b. 825 c. 199.6
12. Convert the following hexadecimal numbers into their equivalent binary numbers.
a. BDA b. 5F.A1 c. 892
13. Using the ASCII table, the following data is encoded in ASCII code. Write the equivalent characters of the English
alphabet.
1000100 1000001 1010100 1000100
14. Encode the word 'Red' into binary values using ASCII encoding scheme.
15. Write the equivalent ISCII code value in decimal and binary for each character of the phrase given below:
Case Based Questions
1. Nirankar has just learnt about the hexadecimal number system. With his previous knowledge of the decimal number
system, he knows how to compute the value using the place value and face value of symbols given in the number. He has
computed the decimal value of the hexadecimal number system, (D20.B1) as given below:
16
66 Touchpad Computer Science-XI

