Analog & Digital Communication
JKSSB Sub-Inspector (Telecommunication) · Communication Systems · 14 practice questions with answers and explanations: 3 Easy, 6 Medium, 5 Hard.
Sample questions
Sample Easy question 1
What does 'PM' stand for in modulation?
- Phase Modulation
- Power Modulation
- Pulse Modulation
- Peak Modulation
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Answer: A. PM stands for Phase Modulation, where the carrier's phase varies with the message signal.
Sample Medium question 2
What does 'ASK' stand for in digital modulation?
- Amplitude Shift Keying
- Automatic Signal Keying
- Analog Signal Keying
- Amplitude Signal Kontrol
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Answer: A. ASK stands for Amplitude Shift Keying, a digital modulation scheme that varies carrier amplitude to represent bits.
Sample Hard question 3
What is 'parity check' a simple form of?
- Error detection, checking whether the number of 1-bits is even or odd
- Encryption
- Modulation
- Signal amplification
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Answer: A. Parity checking adds a bit to make the total count of 1-bits even or odd, catching simple transmission errors.