Encoding Schemes and Number System NCERT Class 11 CS Solution

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Q1. Write base values of binary, octal and hexadecimal number system.



Q2. Give full form of ASCII and ISCII.



Q3. Try the following conversions.
(i) (514)8 = (?)10
(ii) (220)8 = (?)2
(iii) (76F)16 = (?)10
(iv) (4D9)16 = (?)10
(v) (11001010)2 = (?)10
(vi) (1010111)2 = (?)10



Q4. Do the following conversions from decimal number to other number systems.
(i) (54)10 = (?)2
(ii) (120)10 = (?)2
(iii) (76)10 = (?)8
(iv) (889)10 = (?)8
(v) (789)10 = (?)16
(vi) (108)10 = (?)16



Q5. Express the following octal numbers into their equivalent decimal numbers.
(i) 145
(ii) 6760
(iii) 455
(iv) 10.75



Q6. Express the following decimal numbers into hexadecimal numbers.
(i) 548
(ii) 4052
(iii) 58
(iv) 100.25



Q7. Express the following hexadecimal numbers into equivalent decimal numbers.
(i) 4A2
(ii) 9E1A
(iii) 6BD
(iv) 6C.34



Q8. Convert the following binary numbers into octal and hexadecimal numbers.
(i) 1110001000
(ii) 110110101
(iii) 1010100
(iv) 1010.1001



Q9. Write binary equivalent of the following octal numbers.
(i) 2306
(ii) 5610
(iii) 742
(iv) 65.203



Q10. Write binary representation of the following hexadecimal numbers.
(i) 4026
(ii) BCA1
(iii) 98E
(iv) 132.45



Q11. How does computer understand the following text?
(Hint: - 7 bit ASCII code).
(i) HOTS
(ii) Main
(iii) CaSe



Q12. The hexadecimal number system uses 16 literals (0–9, A–F). Write down its base value.



Q13. Let X be a number system having B symbols only. Write down the base value of this number system.



Q14. Write the equivalent hexadecimal and binary values for each character of the phrase given below.
‘‘हम सब एक”



Q15. What is the advantage of preparing a digital content in Indian language using UNICODE font?



Q16. Explore and list the steps required to type in an Indian language using UNICODE.



Q17. Encode the word ‘COMPUTER’ using ASCII and convert the encode value into binary values.