Digital Electronics
JKSSB Sub-Inspector (Telecommunication) · Digital Electronics & Microprocessors · 18 practice questions with answers and explanations: 6 Easy, 7 Medium, 5 Hard.
Sample questions
Sample Easy question 1
What does an 'AND gate' output when both inputs are 1?
- 1
- 0
- Undefined
- Depends on voltage
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Answer: A. An AND gate outputs 1 only when all its inputs are 1.
Sample Medium question 2
What is a 'NAND gate'?
- A gate that outputs 0 only when all inputs are 1, otherwise 1 (AND followed by NOT)
- A gate identical to OR
- A gate that always outputs 1
- A gate with no logical function
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Answer: A. NAND is the inverse of AND: it outputs 0 only when all inputs are 1.
Sample Hard question 3
What is a 'shift register' used for?
- Storing and shifting binary data bit by bit through flip-flops
- Only amplifying analog signals
- Only generating light
- Only measuring voltage
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Answer: A. A shift register is a chain of flip-flops that stores data and shifts it one bit position per clock pulse.