# One Liner about Digital Electronics for RRB JE

Digital electronics is a branch of electronics which uses binary digits for the logical operations and input /output.

1. BIT is acronym for Binary Digit.

2. Binary number system has base 2 and it has only two digits 0 & 1. Or this question can be asked in following way:- Method of representing numbers 0's and 1's is called Binary notation.

3. One nibble equals to four bits.

4. One byte equals to eight bits.

5. One word equals to two bytes or sixteen bits.

6. Double word equals to 4 bytes or 32 bits.

7. Quad word equals to 8 bytes or 64 bits.

8. Decimal number system has base 10 and digits from 0 to 9.

9. 1 KB = 1024 Bytes

10. 1 MB = 1024 KB

11. 1 GB = 1024 MB

12. 1 TB = 1024 GB

13. Decimal to binary conversion can be done by dividing the Decimal number by 2 and writing the reminder of each division in reverse order. Example 25 = 11001

14. Binary to decimal conversion can be done by writing 2' s power in increasing order left to right , then multiply all by their respective 0 or 1 Digit and on addition of all required decimal number will obtain. Example 11001 = 25

15. Hexadecimal number system has base 16 and octal number system has base 8.**Author:- **Amarjeet Singh Jamwal authored articles on Basic Electronics Engineering, Electric Traction, and Electronics Practical for INFO4EEE Website

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