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.

16. NAND and NOR gates are called universal gates.

17. ADC is acronym for analog and digital converter. It is used to display any physical quantity in LCD or LED display like speed, temperature and pressure etc.

18. 110011 in binary will be equivalent to 51 in decimal, 63 in octal and 33 in hexadecimal number system. Binary to decimal is done as explained above and decimal to octal & decimal can be done by dividing decimal number by 8 and 16 respectively and writing the remainder in reverse order as done in decimal to binary conversion.

19. TTL is acronym for transistor transistor logic.

20. ECL is acronym for emitter collector logic.

21. CMOS logic is acronym for complementary metal oxide Semiconductor logic.

22. RTL is acronym for resistor transistor logic.

23. DTL is acronym for diode transistor logic.

24. Fastest memory is cache memory.

Author:- Amarjeet Singh Jamwal authored articles on Basic Electronics Engineering, Electric Traction, and Electronics Practical for INFO4EEE Website