1 is a single digit, 0 is the absence of a digit.
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That is called a "bit", short for "binary digit".
Answer: 2The values are 0 or 1.
In binary, the digit 1 is the highest digit in the system (consisting of 0 and 1). In a boolean machine language, a 1 is interpreted as "true".
In binary 1 + 1 + 1 +1 = 100 This is arrived at since in binary the first digit on the right is the units and the second digit is 2s with the third being 4s. Thus 1 + 1 + 1 +1 = 4 which is made up of 1 four, 0 two and 0 units i.e. 100
To convert binary to hexadecimal split the binary number into blocks of 4 bits from the right hand end; each block represents a hexadecimal digit: 111101110001 → 1111 0111 0001 = 0xF71