This set of Computer Fundamentals Questions and Answers for Freshers focuses on “Positional & Non-Positional Number System”.

1. Which of the following is not a type of number system?

a) Positional

b) Non-Positional

c) Octal

d) Fractional

View Answer

Explanation: There are two main types of number systems : Positional & Non-positional.

Positional System uses digits for the representation whereas, non-positional number systems use certain symbols for the representation of numbers. Octal is a type of positional number systems with base 8.

2. How is the number 5 represented in non-positional number system?

a) IIIII

b) 5

c) V

d) v

View Answer

Explanation: In a non-positional number system, 1 is represented as I, 2 as II, 3 as III, 4 as IIII and therefore, 5 is represented as IIIII. This number system uses symbols for the representation of digits.

3. The base is the total number of digits in a number system.

a) True

b) False

View Answer

Explanation: The statement is true. In a positional number system, base is the number of digits the system comprises. For example, a binary number system comprises of only 2 digits, 0 and 1, therefore its base is 2. Similarly, the decimal system comprises 10 digits 0 to 9, therefore its base is 10.

4. The LSB and MSB of 1243247 are ____ and ____

a) 1, 7

b) 4, 7

c) 7, 1

d) 4, 1

View Answer

Explanation: The LSB or the least significant bit is the rightmost digit at the zeros position. The MSB or the most significant bit is the leftmost digit.

5. A device that uses positional notation to represent a decimal number.

a) Abacus

b) Calculator

c) Pascaline

d) Computer

View Answer

Explanation: Abacus was used to doing arithmetic calculations around 2500 years ago. Pascaline was the pascal’s calculator by Blaise Pascal invented for doing laborious calculations.

6. The 2’s complement of 5 is ______________

a) 1011

b) 0101

c) 1010

d) 0011

View Answer

Explanation: The 2’s complement is obtained by adding 1 to the 1s complement of a number. The 1’s complement of 5(0101) is 1010. For 2’s complement : 1010+1=1011.

7. What does BCD stand for?

a) Bitwise coded decimal

b) Binary coded decimal

c) Binary converted decimal

d) Bitwise Converted Decimal

View Answer

Explanation: BCD is the binary coded decimal form of representation of numbers in 4 bits.E.g. The BCD representation of 5 is 0101. BCD representation of 22 is 00100010.

8. 1 zettabyte = ______________

a) 1024 TB

b) 1024 EB

c) 1024 ZB

d) 1024 PB

View Answer

Explanation: 1 ZB=1024 EB(exabyte)

1 EB=1024PB(petabyte)

1 YB(yottabyte)=1024ZB.

9. Perfrom BCD addition: 2+3= _______________

a) 0010

b) 0011

c) 0101

d) 1010

View Answer

Explanation: BCD of 2 =0010

BCD of 3=0011

0010+0011=0101

Therefore, 2+3=0101(5).

10. ASCII stands for _____________________

a) American standard code for information interchange

b) American scientific code for information interchange

c) American scientific code for international interchange

d) American standard code of international interchange

View Answer

Explanation: ASCII is an encoding standard which is used for communications worldwide. ASCII codes are allotted to digits, special characters and alphabets for data communication purpose.

**Sanfoundry Global Education & Learning Series – Computer Fundamentals.**

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