Question 1 : If operating frequency bands are higher ______ is available.
1. Smaller bandwidth
2. Larger bandwidth
3. Smaller & Larger bandwidth
4. Cannot be determined
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Question 2 : Which of the given signals are periodic?
1. x(t) = 4 cos(5πt)
2. x(t) = u(t) – 1/2
3. x(t) = 4u(t) + 2sin(3t)
4. x[n] = 2sin(3n)
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Question 3 : Digital communication system can handle
1. Analog signals
2. 1D signals
3. 2D signals
4. All of the mentioned
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Question 4 : The capacity of a channel is given by
1. Number of digits used in coding
2. Volume of information it can take
3. Maximum rate of information transmitted
4. Bandwidth requires information
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Question 5 : Find the fundamental period of 1+sin^2 (3π/5)n.
1. 10/3
2. 5
3. 3π/5
4. None of the mentioned
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Question 6 : A band-pass signal has
1. DC component
2. No DC component
3. No side lobes
4. Cannot be determined
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Question 7 : A stationary stochastic process has
1. Finite energy signal
2. Infinite zero signal
3. Zero energy signal
4. None of the mentioned
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Question 8 : The auto-correlation of white noise is
1. A delta function
2. A constant
3. Gaussian
4. None of the mentioned
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Question 9 : A base-band signal can be up-converted using
1. Sine wave
2. Cosine wave
3. Filtering
4. None of the mentioned
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Question 10 : Properties of impulse function are
1. Symmetry
2. Time scaling
3. Shifting
4. All of the mentioned
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