GATE 2011 EC Solved Paper

3. An analog signal is band-limited to 4kHz, sampled at the Nyquist rate and the
samples are quantized into 4 levels. The quantized levels are assumed to be
independent and equally probable. If we transmit two quantized samples per
second, the information rate is ________ bits / second.
(A) 1 (B) 2 (C) 3 (D) 4
Answer: - (D)
Exp: - Since two samples are transmitted and each sample has 2 bits of information,
then the information rate is 4 bits/sec.

15. The Column-I lists the attributes and the Column-II lists the modulation
systems. Match the attribute to the modulation system that best meets it
Column-I Column-II
P Power efficient transmission of signals 1 Conventional AM
Q Most bandwidth efficient transmission of voice signals 2 FM
R Simplest receiver structure 3 VSB
S Bandwidth efficient transmission of signals with Significant dc component
4 SSB-SC
(A) P-4;Q-2;R-1;S-3 (B) P-2;Q-4;R-1;S-3
(C) P-3;Q-2;R-1;S-4 (D) P-2;Q-4;R-3;S-1
Answer: - (B)

57. Choose the most appropriate word from the options given below to complete the
following sentence: It was her view that the country's problems had been_________ by foreign technocrats, so that to invite them to come back would be
counter-productive.
(A) Identified (B) ascertained (C) Texacerbated (D) Analysed

Answer: - (C)
Exp: -The clues in the question are ---foreign technocrats did something negatively to the problems – so it is counter-productive to invite them. All other options are
non-negative. The best choice is exacerbated which means aggravated or
worsened.

58. Choose the word from the options given below that is most nearly opposite in
meaning to the given word:
Frequency
(A) periodicity (B) rarity
(C) gradualness (D) persistency
Answer: - (B)
Exp: - The best antonym here is rarity which means shortage or scarcity.
59. Choose the most appropriate word from the options given below to complete the
following sentence: Under ethical guidelines recently adopted by the
Indian Medical Association, human genes are to be manipulated only to
correct diseases for which______________ treatments are
unsatisfactory.
(A) Similar (B) Most (C) Uncommon (D) Available
Answer: - (D)
Exp: - The context seeks to take a deviation only when the existing/present/current/
alternative treatments are unsatisfactory. So the word for the blank should be a
close synonym of existing/present/current/alternative. Available is the closest of
all.

60. The question below consists of a pair of related words followed by four pairs of
words. Select the pair that best expresses the relation in the original pair:
Gladiator : Arena
(A) dancer : stage (B) commuter: train
(C) teacher : classroom (D) lawyer : courtroom
Answer: - (D)

65. The horse has played a little known but very important role in the field of
medicine. Horses were injected with toxins of diseases until their blood built up
immunities. Then a serum was made from their blood. Serums to fight with
diphtheria and tetanus were developed this way.
It can be inferred from the passage that horses were
(A) given immunity to diseases (B) generally quite immune to diseases
(C) given medicines to fight toxins (D) given diphtheria and tetanus serums

Answer: - (B)
Exp: - From the passage it cannot be inferred that horses are given immunity as in (A),
since the aim is to develop medicine and in turn immunize humans. (B) is correct
since it is given that horses develop immunity after some time. Refer “until their
blood built up immunities”. Even (C) is invalid since medicine is not built till
immunity is developed in the horses. (D) is incorrect since specific examples are
cited to illustrate and this cannot capture the essence.

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