Test Series - computer fundamental

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Test Number 6/95

Q: Which of the following is not a type of number system?
A. Positional
B. Non-Positional
C. Octal
D. Fractional
Solution: 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.
Q: How is the number 5 represented in non-positional number system?
A. IIIII
B. 5
C. V
D. v
Solution: 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.
Q: The base is the total number of digits in a number system.
A. True
B. False
C. 0
D. none
Solution: 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.
Q: The LSB and MSB of 1243247 are ____ and ____
A. 1, 7
B. 4, 7
C. 7, 1
D. 4, 1
Solution: 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.
Q: A device that uses positional notation to represent a decimal number.
A. Abacus
B. Calculator
C. Pascaline
D. Computer
Solution: 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.
Q: The 2’s complement of 5 is ______________
A. 1011
B. 0101
C. 1010
D. 0011
Solution: 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.
Q: What does BCD stand for?
A. Bitwise coded decimal
B. Binary coded decimal
C. Binary converted decimal
D. Bitwise Converted Decimal
Solution: 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.
Q: 1 zettabyte = ______________
A. 1024 TB
B. 1024 EB
C. 1024 ZB
D. 1024 PB
Solution: 1 ZB=1024 EB(exabyte)
1 EB=1024PB(petabyte)
1 YB(yottabyte)=1024ZB.
Q: Perfrom BCD addition: 2+3= _______________
A. 0010
B. 0011
C. 0101
D. 1010
Solution: BCD of 2 =0010
BCD of 3=0011
0010+0011=0101
Therefore, 2+3=0101(5).
Q: 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
Solution: 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.

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