# NCERT Solutions Class 11 Computer Science Data Representation

NCERT Solutions Class 11 Computer Science Data Representation. The NCERT solutions for Class 11 Computer Science book have been made by Computer Science teacher of one of the best CBSE school in India. Computer Science in Class 11 is an important and easy to score subject for Class 11 students. These NCERT solutions have been made to give detailed answers and explanations which can be easily understood by the students. You can download the NCERT solutions for free in pdf format. Refer to other links also to download Class 11 Computer Science NCERT solutions, worksheets, sample papers and test papers.

Question 1:
Octal (base 8) was previously a popular choice for representing digital circuit numbers in a form that is more compact than binary. Octal is sometimes abbreviated as oct. Octal counting goes as :
0,1, 2, 3,4, 5, 6, 7,10,11,12,13,14,15,16,17,20, 21 and so on.
Hexadecimal (base 16) is currently the most popular choice for representing digital circuit numbers in a form that is more compact than binary. Hexadecimal numbers are sometimes represented by preceding the value with ‘Ox’, as in 0x1 B84. Hexadecimal is sometimes abbreviated as hex. Hexadecimal counting goes :
0,1,2, 3,4,5, 6, 7, 8,9, A, B, C, D, E, F, and so on. 3

Question 2:
Explain decimal and binary number.
Decimal (base 10) is the way most human beings represent numbers. Decimal is sometimes abbreviated as dec. Decimal counting goes :
0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18 and so on.
Binary (base 2) is the natural way most digital circuits represent and manipulate numbers. Binary numbers are sometimes represented by preceding the value with ‘Ob’, as in Ob1O11. Binary is sometimes abbreviated as bin.
Binary counting goes as : 0,1,10,11,100,101,110,
111, 1000, 1oo1, 1010,1011, 11oo, 1101, 1110, 1111,10000,10001 and so on. 3

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