# Computer Fundamentals Questions and Answers – Positional & Non-Positional Number System

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

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

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 V in Roman Code. The digits in this number system are represented by symbols.

3. The base is the total number of digits in a number system.
a) True
b) False

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

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

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.
Sanfoundry Certification Contest of the Month is Live. 100+ Subjects. Participate Now!

6. The 2’s complement of 5 is ______________
a) 1011
b) 0101
c) 1010
d) 0011

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

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

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

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

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.

To practice all areas of Computer Fundamentals for Freshers, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]