- Option : C
- Explanation : The largest decimal number with 25 digits is 9,999,999,999,999,999,999,999,999. The smallest decimal number in the form 2
^{n}-1 which is greater than or equal to that is 19,342,813,113,834,066,795,298,815. That corresponds to 2^{84}-1. So, the minimum number of binary bits required to represent the decimal number 25 nines in a row is 84. This is 84 ones in a row. If you want to support negative as well as positive numbers, you will need 85.

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7. Decimal number 5 in level parity self correcting code is

- Option : B
- Explanation :

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How many fractional digits 2^{-48} will have?

- Option : D
- Explanation :

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10. The 10's complement of (715)_{8} is

- Option : B
- Explanation :

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