Question 61 : Which method is efficient?
1. Fixed assignment
2. Dynamic allocation
3. Fixed assignment & Dynamic allocation
4. None of the mentioned
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Question 62 : The preamble consists of
1. Synchronization
2. Addressing
3. Error control sequence
4. All of the mentioned
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Question 63 : Gaussian noise has _____ power spread _____ over all frequencies.
1. Zero, uniformly
2. Zero, non uniformly
3. Infinite, uniformly
4. Infinite, non uniformly
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Question 64 : CDMA is
1. Similar to FDMA
2. Similar to TDMA
3. Combination of both
4. None of the mentioned
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Question 65 : Using sampling theorem, analog signal cannot be reconstructed.
1. True
2. False
3.
4.
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Question 66 : Which is based on orthogonality?
1. TDM
2. FDM
3. TDM & FDM
4. None of the mentioned
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Question 67 : In spread spectrum technique, the desired signal is multiplied _____ and interference signal is multiplied _____
1. Once, twice
2. Twice, once
3. Twice, thrice
4. Thrice, twice
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Question 68 : The interface between the ring and the stations are passive.
1. True
2. False
3.
4.
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Question 69 : Which needs precise time coordination?
1. CDMA
2. TDMA
3. CDMA & TDMA
4. None of the mentioned
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Question 70 : The maximum waiting time before transmission of a packet is
1. (M-1)T/M
2. (M-1)M/T
3. (M+1)T/M
4. (M+1)M/T
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