Which of the following is not a positional number system?
Roman Number System
Octal Number System
Binary Number System
Hexadecimal Number System
Answer: Option A
The Roman number system isn’t a positional number system since it uses symbols to represent numbers. The octal number system uses digits from 0-7, the binary number system uses digits from 0-1 whereas, the hexadecimal number system uses digits from 0-15.
The binary equivalent of the decimal number 10 is:
Answer: Option C
To get the binary equivalent of any number, we need to divide the number by 2 and obtain the remainders as : computer-fundamentals-questions-answers-binary-number-system-q3 We then write the remainders in the reverse order as 1010 .
The octal equivalent is obtained by grouping the numbers into three, from right to left before decimal and from right to left after the decimal place. Here, computer-fundamentals-questions-answers-binary-number-system-q5 i.e. 145.12 is the octal equivalent of the number.