General Science PYQ – Computers, Technology and Scientists – Part 2 (Q 27–51)

← Back

General Science PYQ – Computers, Technology and Scientists – Part 2 (Q 27–51) – 25 questions, subject: Science. Every question has the correct answer with a one-line explanation; tap "Show Answer". Free practice for TNPSC, UPSC, SSC, Bank and RRB exams – Shanmugam IAS Academy, Coimbatore.

Get daily current affairs & exam alerts – follow us YouTube WhatsApp Channel Telegram Channel Facebook Page Instagram
Share with friends & study groups
Link to this page from your website / blog (HTML code)
1.  
District Educational Officer 2023
Which among the following statements is not associated with Women in Engineering, Science and Technology (WEST) initiative?

Correct Answer: A [The WEST initiative is launched by Ministry of Women and Child Development]

Explanation:

The WEST initiative was launched by the Principal Scientific Adviser's office under I-STEM and not by the Ministry of Women and Child Development, so statement A is not associated with it.

2.  
Combined Research Assistant 2023
Theme for National Science day 2020 is

Correct Answer: B [Women in science]

Explanation:

The theme of National Science Day 2020 (28 February, marking the Raman effect) was Women in Science.

3.  
Jailor 2023
Honey is separated from bees wax with help of

Correct Answer: A [Centrifuge]

Explanation:

A honey extractor works on centrifugal principle, flinging honey out of the honeycomb as it spins and so separating it from beeswax.

4.  
GSASO 2020
A team of scientists led by Binoy Kumar Saikia and Tonkeswar from Assam developed _____ to detect cancer cells

Correct Answer: A [Biomedical 'dot' from coal]

Explanation:

A CSIR-NEIST team led by Binoy Kumar Saikia made carbon quantum dots from low-grade coal, which light up cells for cancer detection.

5.  
District Educational Officer 2023
The method of building nanomaterials by assembling atoms is called

Correct Answer: B [Bottom-up approach]

Explanation:

Building nanomaterials by assembling atoms and molecules is the bottom-up approach, while breaking down bulk material is the top-down approach.

6.  
AJ 2023
Which one of the following is the Natural Nanomaterial?

Correct Answer: A [Peacock feather]

Explanation:

A peacock feather's colour arises from nano-scale structures that scatter light, so it is a natural nanomaterial.

7.  
Group 1 2022
Which of the following statements is/are correct? NANOBOTS are:
(1) Robots that carry out a very specific function at nano scale level
(2) They can be injected into blood stream
(3) They can be used to measure toxic elements in the environment
(4) They are very cheap to produce

Correct Answer: C [(1), (2) and (3)]

Explanation:

Nanobots perform specific tasks at nano scale, can be injected into the bloodstream and can measure toxic substances in the environment, but they are costly, so (1), (2) and (3) are correct.

8.  
Group 2A Mains 2025
Which of the following is/are correct about Dip-Pen Nano Lithography (DPN)?
(i) It is a direct method
(ii) It works on diffusion through water molecules
(iii) It patterns a variety of materials
(iv) It is a fast scanning process

Correct Answer: C [(i), (ii) and (iii) only]

Explanation:

Dip-pen nanolithography is a direct-write method in which ink diffuses through a water meniscus and can pattern many materials, but it is slow, so (iv) is wrong.

9.  
Group 2A Mains Re-Exam 2026
Which of the following statement(s) is/are true about the techniques used for nanomaterial synthesis?
(i) Ordered structural organisation of molecules occurring when the system is in equilibrium without dissipating energy is called static self-assembly.
(ii) Electron beam lithography uses a beam of electromagnetic waves to generate patterns for integrated circuits at nanoscale.
(iii) Atomic force microscope tips can be used as a nanoscale write head to deposit chemicals on a surface.

Correct Answer: B [(i) and (iii) only]

Explanation:

Static self-assembly occurs in equilibrium and AFM tips can write chemicals on surfaces, but electron beam lithography uses an electron beam, not electromagnetic waves, so (i) and (iii) are true.

10.  
AD Town & Country Planning 2022
Which of the following is a magnetic storage device?

Correct Answer: D [Floppy disc]

Explanation:

A floppy disc stores data on a magnetically coated disk, so it is a magnetic storage device, while DVD and CD are optical and a pen drive is flash memory.

11.  
GSCE 2021
What is the capacity of Blu-Ray disc?

Correct Answer: A [50 GB]

Explanation:

A Blu-ray disc holds 25 GB on a single layer and 50 GB on a dual layer.

12.  
Group 2A Mains Re-Exam 2026
Match correctly the devices and their properties:
(a) Flat panel display readers – 1. Black and white
(b) E-ink readers – 2. Print cartridges are expensive
(c) Dot-matrix printer – 3. Full colours
(d) Inkjet printer – 4. Contact printers

Correct Answer: B [3 1 4 2]

Explanation:

Flat panel displays show full colour, E-ink readers mostly black and white, dot-matrix printers are contact printers and inkjet cartridges are expensive, giving 3 1 4 2.

13.  
Group 2A Mains (Revoked) 2026
Which of the following is correctly paired?
(1) Binary – Base 2
(2) Decimal – Base 16
(3) Octal – Base 8
(4) Hexadecimal – Base 10

Correct Answer: A [(1) and (3) are correct]

Explanation:

Binary is base 2 and octal is base 8, whereas decimal is base 10 and hexadecimal base 16, so (1) and (3) are correct.

14.  
Group 2A Mains (Revoked) 2026
Match the following shortcut keys and actions:
(a) Select the entire document – 1. Ctrl + Z
(b) Cut the selected text – 2. Ctrl + V
(c) Paste the text – 3. Ctrl + A
(d) Cancel (undo) the previous operation – 4. Ctrl + X

Correct Answer: A [3 4 2 1]

Explanation:

Ctrl+A selects the whole document, Ctrl+X cuts, Ctrl+V pastes and Ctrl+Z undoes, giving 3 4 2 1.

15.  
Group 2A Mains Re-Exam 2026
Arrange the following networks in order of increasing geographical area:
(1) WAN
(2) PAN
(3) MAN
(4) LAN

Correct Answer: B [(2), (4), (3), (1)]

Explanation:

Networks increase in area from PAN to LAN to MAN to WAN, i.e. (2), (4), (3), (1).

16.  
Group 2A Mains 2025
Arrange the following OSI layers in order:
(1) Data link layer
(2) Physical layer
(3) Transport layer
(4) Network layer

Correct Answer: A [(2), (1), (4), (3)]

Explanation:

From bottom to top the OSI layers run physical, data link, network and transport, i.e. (2), (1), (4), (3).

17.  
Group 2A Mains (Revoked) 2026
The loss in amplitude or strength of the signal as it travels through a channel is called

Correct Answer: C [Attenuation]

Explanation:

The loss of strength or amplitude of a signal as it travels through a channel is attenuation.

18.  
VAS AHGS 2020
The downloading speed of 5G enabled network is about

Correct Answer: C [20 gigabit per second]

Explanation:

The ITU's IMT-2020 standard sets the peak 5G download speed at about 20 gigabits per second.

19.  
Group 2A Mains Re-Exam 2026
Match correctly the e-mail header fields:
(a) To – 1. Person or people who created the message
(b) Cc – 2. Email address for blind carbon copies
(c) Bcc – 3. Email address of secondary recipient
(d) From – 4. Email address of primary recipient

Correct Answer: B [4 3 2 1]

Explanation:

In an email, To is the primary recipient, Cc the secondary recipient, Bcc the blind carbon copy and From the sender, giving 4 3 2 1.

20.  
Group 2A Mains Re-Exam 2026
Assertion [A]: In a relational database a foreign key in one table is used to reference the primary key in another table.
Reason [R]: Foreign key is used to ensure the referential integrity between tables.

Correct Answer: B [Both [A] and [R] are true]

Explanation:

A foreign key references the primary key of another table and thereby ensures referential integrity between tables, so both statements are true.

21.  
Executive Officer Gr. III (HR&CE) 2022
The name of the first supercomputer assembled indigenously under the National Supercomputing Mission

Correct Answer: B [Param Shivay]

Explanation:

PARAM Shivay, installed at IIT (BHU) Varanasi in 2019, was the first supercomputer assembled indigenously under the National Supercomputing Mission.

22.  
Asst. Training Officer (Textile) 2023
The latest Indian supercomputer (as asked in 2023) is

Correct Answer: D [Param Siddhi]

Explanation:

Among the options only PARAM Siddhi (C-DAC, Pune) is Indian, while Fugaku, Summit and Tianhe-2 belong to Japan, the USA and China.

23.  
Special Competitive Exam 2025
Who is considered as the father of artificial intelligence?

Correct Answer: C [John McCarthy]

Explanation:

John McCarthy coined the term artificial intelligence at the 1956 Dartmouth conference and is called the father of AI.

24.  
Group 1 2024
Match the following:
(a) SLP – 1. Deep Learning
(b) GAI – 2. National Centre on AI
(c) DL – 3. Statistical Language Processing
(d) NCAI – 4. Generative Artificial Intelligence

Correct Answer: D [3 4 1 2]

Explanation:

SLP is Statistical Language Processing, GAI Generative Artificial Intelligence, DL Deep Learning and NCAI National Centre on AI, giving 3 4 1 2.

25.  
CTS (Non-Interview Posts) 2024
The Global Partnership on Artificial Intelligence (GPAI) summit held in December 2023 took place in

Correct Answer: D [New Delhi]

Explanation:

The Global Partnership on Artificial Intelligence (GPAI) summit of December 2023 was held in New Delhi.

? Full explanations with tables – General Science PYQ book (₹149): www.shanmugamiasacademy.in/study-materials/tnpsc-general-science-pyq

📘 TNPSC பொது அறிவு அலகு I — பொது அறிவியல் (General Science) – முழுமையான பாடநூல்
Here you get the answer with a one-line explanation. TNPSC பொது அறிவு அலகு I பொது அறிவியல் முழுவதும் · 14 அத்தியாயங்கள் · 260 பயிற்சி வினாக்கள் விடையுடன் · 2 மாதிரித் தேர்வுகள் (50 வினாக்கள்) · 14 மனவரைபடங்கள் · அக்டோபர் 2026 வரையிலான அறிவியல் நடப்பு நிகழ்வுகள்
Get the book – ₹149 ₹299 →
Score: 0 Answered: 0 / 0