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Previous year question hub

Communication and Optical Instrumentation - Instrumentation Engineering Previous Year Questions

Practice Communication and Optical Instrumentation - Instrumentation Engineering previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

21Papers
18Years
59Questions
1Topics

Communication and Optical Instrumentation question pattern

Every graph below is calculated only from this selection.

Questions by year

Compare question counts across years.

Difficulty distribution

How the classified questions are distributed by difficulty.

Easy 33 55.9%
Medium 26 44.1%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

MCQ 37 62.7%
Numerical Answer Type (NAT) 14 23.7%
Fill in the blanks 8 13.6%

Subject weightage

Top subjects by unique question coverage.

Instrumentation Engineering
59 Qs

Most asked topics

Top topics across the included previous year papers.

Communication and Optical Instrumentation
59 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Optical Sources, Detectors and Interferometry
26 Qs
Modulation, Multiplexing and Sensor Networks
22 Qs
Fibre-optic and Spectroscopic Instrumentation
11 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

Instrumentation Engineering (IN) 2026
5 Qs
Instrumentation Engineering (IN) 2025
1 Qs
Instrumentation Engineering (IN) 2024
1 Qs
Instrumentation Engineering (IN) 2023
2 Qs
Instrumentation Engineering (IN) 2022
4 Qs
Instrumentation Engineering (IN) 2021
3 Qs
Instrumentation Engineering (IN) 2019
4 Qs
Instrumentation Engineering (IN) 2018
4 Qs
Instrumentation Engineering (IN) 2017
4 Qs
Instrumentation Engineering (IN) 2016
2 Qs
Instrumentation Engineering (IN) 2015
1 Qs
Instrumentation Engineering (IN) 2014
2 Qs
Instrumentation Engineering (IN) 2013 [Session 1]
2 Qs
Instrumentation Engineering (IN) 2013 [Session 2]
1 Qs
Instrumentation Engineering (IN) 2013 [Session 3]
1 Qs
Instrumentation Engineering (IN) 2013 [Session 4]
1 Qs
Instrumentation Engineering (IN) 2011
1 Qs
Instrumentation Engineering (IN) 2010
3 Qs
Instrumentation Engineering (IN) 2009
5 Qs
Instrumentation Engineering (IN) 2008
9 Qs
Instrumentation Engineering (IN) 2007
3 Qs

Browse by subtopics

Open a focused page built from the same verified paper data.

Optical Sources, Detectors and Interferometry

Explore previous-paper coverage, trends and focused practice for Optical Sources, Detectors and Interferometry.

26 questions14 papers14 years

Modulation, Multiplexing and Sensor Networks

Explore previous-paper coverage, trends and focused practice for Modulation, Multiplexing and Sensor Networks.

22 questions16 papers13 years

Fibre-optic and Spectroscopic Instrumentation

Explore previous-paper coverage, trends and focused practice for Fibre-optic and Spectroscopic Instrumentation.

11 questions10 papers10 years

Included previous year papers

Newest papers appear first. Search these papers or sort by year and name.

Paper nameYearPDFAttempt
Instrumentation Engineering (IN) 20262026
5 questions in this view		2026
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Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Instrumentation Engineering (IN) 20252025
1 questions in this view		2025
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Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Instrumentation Engineering (IN) 20242024
1 questions in this view		2024
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Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Instrumentation Engineering (IN) 20232023
2 questions in this view		2023
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Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Instrumentation Engineering (IN) 20222022
4 questions in this view		2022
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Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Instrumentation Engineering (IN) 20212021
3 questions in this view		2021
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Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Instrumentation Engineering (IN) 20192019
4 questions in this view		2019
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ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Instrumentation Engineering (IN) 20182018
4 questions in this view		2018
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Official documents
Official question paperOriginal authority-issued PDF Official Download
Instrumentation Engineering (IN) 20172017
4 questions in this view		2017
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ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Instrumentation Engineering (IN) 20162016
2 questions in this view		2016
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ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Instrumentation Engineering (IN) 20152015
1 questions in this view		2015
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Official documents
Official question paperOriginal authority-issued PDF Official Download
Instrumentation Engineering (IN) 20142014
2 questions in this view		2014
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Official documents
Official question paperOriginal authority-issued PDF Official Download
Instrumentation Engineering (IN) 2013 [Session 1]2013
2 questions in this view		2013
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Instrumentation Engineering (IN) 2013 [Session 2]2013
1 questions in this view		2013
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Instrumentation Engineering (IN) 2013 [Session 3]2013
1 questions in this view		2013
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Instrumentation Engineering (IN) 2013 [Session 4]2013
1 questions in this view		2013
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Instrumentation Engineering (IN) 20112011
1 questions in this view		2011
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ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Instrumentation Engineering (IN) 20102010
3 questions in this view		2010
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ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Instrumentation Engineering (IN) 20092009
5 questions in this view		2009
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Instrumentation Engineering (IN) 20082008
9 questions in this view		2008
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Instrumentation Engineering (IN) 20072007
3 questions in this view		2007
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Official documents
Official question paperOriginal authority-issued PDF Official Download

Sample previous year questions

A varied preview from the papers represented in this selection, with every available option.

1
2009 · Instrumentation Engineering · Communication and Optical Instrumentation · Modulation, Multiplexing and Sensor Networks
Instrumentation Engineering (IN) 2009
A 50% duty cycle square wave with zero mean is used as a baseband signal in an ideal frequency modulator with a sinusoidal carrier of frequency ω_c. The modulated signal is given as an input to an ideal phase demodulator (a circuit that produces an output proportional to the difference in phase of the modulated signal from that of the carrier). The output of the circuit is
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2
2010 · Instrumentation Engineering · Communication and Optical Instrumentation · Modulation, Multiplexing and Sensor Networks
Instrumentation Engineering (IN) 2010
In a pulse code modulated (PCM) signal sampled at \( f_s \) and encoded into an \( n \)-bit code, the minimum bandwidth required for faithful reconstruction is
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3
2011 · Instrumentation Engineering · Communication and Optical Instrumentation · Fibre-optic and Spectroscopic Instrumentation
Instrumentation Engineering (IN) 2011

The core/cladding index difference of a single-mode optical fiber cable is 0.01. The refractive index of the material of the core is 1.5. The maximum angle of acceptance of the fiber is approximately equal to

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4
2013 · Instrumentation Engineering · Communication and Optical Instrumentation · Modulation, Multiplexing and Sensor Networks
Instrumentation Engineering (IN) 2013 [Session 1]

Signals from fifteen thermocouples are multiplexed and each one is sampled once per second with a 16-bit ADC. The digital samples are converted by a parallel to serial converter to generate a serial PCM signal. This PCM signal is frequency modulated with FSK modulator with 1200 Hz as 1 and 960 Hz as 0. The minimum band allocation required for faithful reproduction of the signal by the FSK receiver without considering noise is

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