01․ Which is typically the longest: bit,byte,nibble,word?

Bit is the smallest unit in digital representation of any number.
Nibble consist of 4-Bit.
Byte consist of 8-bit.
Word consist of several bytes.

02․ What is the gray code for the binary 101011?

03․ A number system with radix 2 is known as

A number system with radix 2 is known as Binary.

04․ A group of four bits is known as

A group of four bits is known as nibble.

05․ The binary number 110011.11 is equivalent to decimal number

06․ The decimal number 0.246 in binary is

07․ The 1’s complement of 11010111 is

As we know 1’s complement is done by replacing 1 with 0 and 0 with 1 so in this case

08․ Which of the following is 1’s complement representation of -34?

In 1’s complement representation negative numbers are denoted by 1’s complement of positive number.
Binary of +34 is 00100010
-34 will be represented as 1’s complement of (00100010) i.e. (11011101)

09․ Which of the following is 1’s complement representation of +57

In 1’s complement representation method a positive number is represented by same binary.
i.e. (00111001)

10․ What is the 2’s complement of 10110000?

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