As you want to get the last year question papers of IES of Electronics & Tele-communication Engineering so here it is for you:

Some content of the file has been given here:

1. If the mantissa in the floating point
representation of a number is 37 bits long,
then what is the accuracy of the digital
computer?
a. 37 decimal places
b. 23 decimal places
c. 11 decimal places
d. 10 decimal places
2. Which one of the following is correct?
The convention is that the number 0 has
the normal form representation as
a. 0
b. .0
c. 0.0
d. 0.10°
3. Match List I with List II and select the
correct. Answer using the code given
below the lists:
List-I
(Pascal Operator)
A. : =
B. < >
C. =
List-II
(C Operator)
1. ! =
2. = =
3. =
Code:
A B C
a. 1 2 3
b. 3 1 2
c. 2 1 3
d. 2 3 1
4. For interfacing of assembly language
routines with some high level language,
one must address which of the following?
1. How is the subroutine invoked?
2. How are parameters passed?
3. How are values returned?
4. How many parameters are passed?
Select the correct answer using the code
given below:
a. 1, and 3 only
b. 2 and 4 only
c. 1, 2 and 3 only
d. 1, 2, 3 and 4
6. The parallel computers are divided into
which of the following architectural
configuration?
1. Array processors
2. Data processors
3. Multi processor systems
4. Pipeline computers
Select the correct answer using the code
given below:
a. 1, 2 and 3 only
b. 2, 3 and 4 only
c. 1, 3 and 4 only
7. In order to build a 3 bit simultaneous A/D
converter, what is the number of
comparator circuits required?
a. 7
b. 8
c. 15
d. 16
8. Which one of the following is correct? A
Micro program is
a. Any source program run on micro
computers
b. Any set of instructions for primitive
operations in a system
c. A general name for ‘macros’ used in
assembly language programming
d. Any program of a very small size
9. Which are the characteristics of vertical
micro instructions?
1. Considerable encoding of control
information
2. Limited ability to express parallel
micro operation
3. Long format
Select the correct answer using the code
given below:
a. 1 and 2 only
b. 2 and 3 only
c. 1 and 3 only
d. 1, 2 and 3
10. A magnetic drum of 8 inch diameter has
100 tracks and storage density of 200
bits/inch. What is its storage capacity?
a. 8402 bits
b. 202400 bits
c. 502400 bits
d. 1004800 bits
11. Match List-I and select the correct answer
using the code given below the lists:
List – I
( Type of Memory)
A. DRAM
B. SRAM
C. Hard Disk
D. Magnetic Tape
List- II
(Relative Access Time)
1. 1
2. 10
3. 100000
4. 10000000
Code:
A B C D
a. 1 2 3 4
b. 1 2 4 3
c. 2 1 3 4
d. 2 1 4 3
12. Consider the following statements:
Bias stabilization in a BJT circuit is very
important, because it
1. Provides high voltage and current gain.
2. Ensures large bandwidth of the
amplifier.
3. Keep the operating point unchanged
with change of temperature.
Which of the above statements is/are
correct?
a. 1 and 2
b. 2 and 3
c. 3 only
d. 1 and 3
13. Source S1 produces 4 discrete symbols
with equal probability.
Source S2 produces 6 discrete symbols
with equal probability.
If H1 and H2 are the entropies of sources S1
and S2 respectively, than which one of the
following is correct?
a. H1 is always less than H2
b. H1 is always greater than H2
c. H1 is always equal to H2
d. H2 is 1-5 times H1 only
14. The entropy of a digital source is 2.7
bits/symbol. It is producing 100 symbols
per second. The source is likely to be
which one of the following?
a. A binary source
b. A quaternary source
c. An octal source
d. A hexadecimal source
15. Match List-I and List-II and select the
correct answer using the code given below
the lists:
List-I
(Type of Noise)
A. Shot noise
B. Thermal noise
C. White noise
D. Narrow band noise
List-II
(Its Property)
1. Noise generated in a resistor
2. Power spectral density is independent
of frequency
3. Temperature limited diode
4. Noise at the output of a filter
Code:
A B C D
a. 2 4 3 1
b. 3 1 2 4
c. 2 1 3 4
d. 3 4 2 1
16. Which one of the following is the correct
statement?
If the value of a resistor creating thermal
noise is doubled, the noise generated is
a. Halved
b. Doubled
c. Unchanged
d. Slightly changed
17. The outputs of tow noise sources each
producing uniformly distributed noise over
the range -a to + a are added. What is the
p.d.f of the added noise?
a. Uniformly distributed over the range -
2a to +2a
b. Triangular over the range-2a to 2a
c. Gaussian over the range -  to 
d. None of the above
18. Which of the following pulse modulations
are digital?
1. PCM
2. Differential PCM
3. PWM
Select the correct answer using the code
given below:
a. 1 and 2 only
b. 2 and 3 only
c. 1 and 3 only
d. 1,2 and 3
19. Which one of the following is an indirect
way of generating FM?
a. Reactance FET Modulator
b. Varacter diode Modulator
c. Armstrong Modulator
d. Reactance tube Modulator
20. A good line code should have which of the
following?
1. Favorable psd
2. Low inter symbol interference
3. Adequate timing content
4. Transparency
Select the correct answer using the
code given below:
a. 1, 3 and 4
b. 1, 2 and 4
c. 2, 3 and 4
d. 1, 2 and 3
21. Multiplexing is possible if signals are
sampled. Two signals have bandwidths A
= 0 to 4 kHz and B = 0 to 8 kHz
respectively. The sampling frequency
chosen is 12 kHz.
Which one of the following is correct?
This choice of the sampling frequency
a. is correct since A and B have an
integral relationship of 2
b. will not lead to aliasing
c. does not obey sampling theorem
d. can never lead to multiplexing
22. Which one of the following is correct?
In a TDM system each signal is allotted in
a frame a unique and fixed
a. frequency slot
b. time slot
c. amplitude slot
d. phase slot
23. Match List-I with List-II and select the
correct answer using the code given below
the lists:
List-I
(Medium Type)
A. Open wire
B. Twisted pair
C. Coaxial-cable
D. Waveguide
List-II
(Frequency Range)
1. 100 kHz
2. 100 kHz
3. 100 GHz
4. 5.0 kHz
Code:
A B C D
a. 4 3 2 1
b. 2 1 4 3
c. 2 3 4 1
d. 4 1 2 3
24. Match List-I with List-II and select the
correct answer using the code given below
the lists:
A. IF amplifier
B. Mixer
C. Detector
D. Automatic gain control
List-II
(Function)
1. Demodulator
2. Narrow band tuned amplifier
3. Variable gain amplifier
4. Frequency conversion
Code:
A B C D
a. 1 4 2 3
b. 2 3 1 4
c. 1 3 2 4
d. 2 4 1 3
25. The Boolean functions can be expressed in
canonical SOP (sum of products) and POS
(product of sums) form. For the function,
Y = A+ B . C, which are such two forms?
a. Y =  (1, 2, 6, 7) and Y=II (0, 2, 4)
b. Y=  (1, 4, 5, 6, 7) and Y = II (0, 2, 3)
c. Y = (1, 2, 5, 6, 7) and Y=II (0, 1, 3)
d. Y =  (1, 2, 4, 5, 6, 7) and Y = II (0,
2, 3, 4)
26. The Boolean function A+BC is a reduced
form of which one of the following?
a. AB + BC
b. AB + A B C
c. (A + B). (A + C)
d. None of the above
27. Which one of the following statements is
not correct?
a. X+ X Y = X
b. X( X +Y) = XY
c. XY +XY = X
d. ZX+Z X Y = ZX+ZY
28. Consider the following statements:
Dominant-pole frequency compensation in
an OP-AMP
1. increases the slew-rate of the OPAMP.
2. increases the stability of the OP-AMP.
3. reduces the bandwidth of the OP-AMP
4. reduces the CMRR of the OP-AMP.
Which of the statements given above are
correct?
a. 1 and 3 only
b. 1, 2 and 4
c. 1 and 2 only
d. 2 and 3 only
29. In a practical oscillator circuit, which one
of the following limits the amplitude of the
oscillations?
a. Onset of non-linearity
b. Power supply voltage
c. Oscillation frequencies
d. Temperature of the active device
30. Consider the following statements:
1. Are wide band amplifiers.
2. Are used in radio transmitters and
receivers.
3. Performance is determined by Q of the
circuit.
Which of the statements given above are
correct?
a. 1 and 2 only
b. 2 and 3 only
c. 1 and 3 only
d. 1, 2 and 3
31. A feedback amplifier has an open loop
gain of -100. If 4% of the output is fed
back in a degenerative loop, what is the
closed loop gain of the amplifier?
a. – 33.3
b. – 25
c. – 20
d. + 25
32. Match List-I with List-II and select the
correct answer using the code given below
the lists:
List-I
(Type of Feedback)
A. Voltage series
B. Voltage shunt
C. Current series
D. Current shunt
List-II
(Effect on R in and R out)
1. R in increases and R out decreases
2. R in and R out decrease
3. R in and R out increase
4. R in decreases and R out increases
Code:
A B C D
a. 1 4 3 2
b. 3 2 1 4
c. 3 4 1 2
d. 1 2 3 4



Contact Details:
Union Public Service Commission
UPSC,
Man Singh Road Area,
New Delhi,
Delhi 110069
India

Map Location: