PYQs Based Test - 11 : Communications
Questions
20
Duration
180 min
Total Marks
32
Negative
Topics Covered
General(20)
Sample Questions from this Test
- A linear Hamming code is used to map 4-bit messages to 7-bit code words. The encoder mapping is linear. If the message 0001 is mapped to the code word 0000111, and the message 0011 is mapped to the code word 1100110, then the message 0010 is mapped toView solution & explanation →
- An analog baseband signal, band-limited to 100 Hz, is sampled at the Nyquist rate. The samples are quantized into four message symbols that occur independently with probabilities p₁ = p₄ = 0.125 and p₂ = p₃. The information rate (bits/sec) of the message source is __________View solution & explanation →
- A binary source generates symbols 𝑋 ∈ {−1, 1} which are transmitted over a noisy channel. The probability of transmitting 𝑋 = 1 is 0.5. Input to the threshold detector is 𝑅 = 𝑋 + 𝑁. The probability density function *f *(𝑛) of the noise 𝑁 is shown below:View solution & explanation →
If the detection threshold is zero, then the probability of error (correct to two decimal places) is ________.
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Test Instructions
- The test contains 20 questions and a total of 32 marks.
- You will have 180 minutes to complete the test. The timer cannot be paused once started.
- Negative marking: 0.25 mark(s) deducted per wrong answer.
- Use the question palette to mark questions for review and navigate freely.
- Detailed solutions and analytics are available immediately after submission.
- This is a free practice test. No login required to attempt.