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2. Fill in the blanks using the words from the help box.
OFF, binary, base-2 system, 12, bit
a. A __________ is a smallest unit of data represented in a computer.
b. The digit 0 (Zero) represents the electronic state __________.
c. The binary number system is also known as __________.
d. In the hexadecimal number system, the letter C = __________.
e. The computer system understands __________ numbers.
3. Answer in one or two words.
a. What is a group of eight bits called? ____________
b. What is the decimal number system also known as? ____________
c. Which number system uses symbols, 0 to 9 and A to F? ____________
4. Think and answer.
a. What is an octal number system?
______________________________________________________________________________________
b. What do you understand by the number system? Give an example.
______________________________________________________________________________________
c. What do you mean by base in a number system?
______________________________________________________________________________________
d. How do you represent data on a computer?
______________________________________________________________________________________
______________________________________________________________________________________
e. How can we convert a binary number into a decimal number? Give an example.
______________________________________________________________________________________
______________________________________________________________________________________
f. Write the rules to subtract two binary numbers.
______________________________________________________________________________________
______________________________________________________________________________________
5. Solve the following:
a. Convert these into the given number system and write their results.
(i) (101) to decimal number system __________
2
(ii) (250) to binary number system __________
10
(iii) 101011 to decimal number system __________
2
(iv) 10111011 to decimal number system __________
2
b. Perform the following operations on binary numbers:
(i) Subtract (1101) from (100110) ____________
2 2
(ii) Add (1000) and (101) 2 ____________
2
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