UPSC CSE · Subject
UPSC Prelims Science and Technology PYQs (2011–2026): Topic-wise with Answers
196 UPSC Prelims questions on Science and Technology from 2011–2026, grouped by topic with the newest year first. The most-asked topics are Information and Communication Technology (36), Biotechnology (30), Biology (25). Difficulty: 19% easy, 50% medium and 31% hard.
Science and Technology topics
- Information and Communication Technology36 questions
- Biotechnology30 questions
- Biology25 questions
- Space Technology22 questions
- Miscellaneous Science and Technology20 questions
- Physics17 questions
- Defence Technology14 questions
- Health14 questions
- Chemistry5 questions
- Diseases5 questions
- Nanoscience and Nanotechnology4 questions
- Nuclear Technology4 questions
Information and Communication Technology 36 questions
- Dhruv64 MicroprocessorWhich of the following statements about DHRUV64 is/are correct?
- Semiconductor Plants LocationsWhich one of the following pairs of semiconductor plants in India and their locations is NOT correctly matched?
- Blockchain FeaturesWhich of the following statements regarding the features of blockchain technology are correct?
- Large Language ModelsWhich of the following statements with regard to Large Language Models (LLMs) used in machine learning is/are correct?
- National Quantum MissionWhich of the following statements with regard to the National Quantum Mission (NQM) is/are correct?
- AI Impact Summit 2026Consider the following statements with respect to the AI Impact Summit, 2026 held in New Delhi:
- Majorana 1 Quantum ChipConsider the following statements:
- Metaverse DefinitionWhich one of the following words/phrases is most appropriately used to denote 'an interoperable network of 3D virtual worlds that can be accessed simultaneously by…
- Radar ApplicationsConsider the following activities:
- Accelerometer ApplicationsConsider the following actions:
- Open Source Digital PlatformsConsider the following:
- Web 3 0With reference to Web 3.0, consider the following statements:
- Software As a ServiceWith reference to "Software as a Service (SaaS)", consider the following statements:
- Qubit Quantum ComputingWhich one of the following is the context in which the term "qubit" is mentioned?
- Short Range DevicesConsider following communication the technologies:
- Non Fungible TokensWith reference to Non-Fungible Tokens (NFTs), consider the following statements:
- Artificial Intelligence ApplicationsWith the present state of development, Artificial Intelligence can effectively do which of the following?
- Visible Light CommunicationWith reference to Visible Light Communication (VLC) technology, which of the following statements are correct?
- Blockchain TechnologyWith reference to 'Blockchain Technology', consider the following statements:
- LTE and Volte DifferencesWith reference to communications technologies, what is/are the difference/differences between LTE (Long-Term Evolution) and VoLTE (Voice over Long-Term Evolution)?
- Augmented Virtual RealityIn the context of digital technologies for entertainment, consider the following statements:
- Digital SignatureConsider the following statements: A digital signature is
- Wearable Devices UsesIn the context of wearable technology, which of the following tasks is/are accomplished by wearable devices?
- Wannacry Petya Cyber AttacksThe terms 'WannaCry, Petya and EternalBlue' sometimes mentioned in the news recently are related to
- Internet of Things Smart Home ScenarioWhen the alarm of your smartphone rings in the morning, you wake up and tap it to stop the alarm which causes your geyser to be switched on automatically. The smart…
- OLED DisplaysOrganic Light Emitting Diodes (OLEDs) are used to create digital display in many devices. What are the advantages of OLED displays over Liquid Crystal displays?
- Cyber Security Incident ReportingIn India, it is legally mandatory for which of the following to report on cyber security incidents?
- Smart India HackathonWhich of the following statements is/are correct regarding Smart India Hackathon 2017?
- Digilocker Document StorageRegarding 'DigiLocker', sometimes seen in the news, which of the following statements is/are correct?
- Lifi TechnologyWith reference to ‘LiFi’, recently in the news, which of the following statements is/are correct?
- Project Loon‘Project Loon’, sometimes seen in the news, is related to
- SWAYAM Online Education‘SWAYAM’, an initiative of the Government of India, aims at
- Near Field CommunicationWith reference to 'Near Field Communication (NFC) Technology', which of the following statements is/are correct?
- Bluetooth vs Wi-FiWhat is the difference between Bluetooth and Wi-Fi devices?
- Virtual Private NetworkWhat is “Virtual Private Network”?
- Ionosphere Radio CommunicationA layer in the Earth’s atmosphere called ionosphere facilitates radio communication. Why?
Biotechnology 24 questions
- Genetic MedicineWhich of the following statements with regard to genetic medicine is/are correct?
- Genomeindia ProjectWhich of the following statements with regard to GenomeIndia Project is/are correct?
- Monoclonal AntibodiesWith reference to monoclonal antibodies, often mentioned in news, consider the following statements:
- Hydrogel UsesIn which of the following are hydrogels used?
- Membrane BioreactorsMembrane Bioreactors' are often discussed in the context of:
- Aerial MetagenomicsAerial metagenomics' best refers to which one of the following situations?
- Microsatellite DNAMicrosatellite DNA' is used in the case of which one of the following?
- DNA BarcodingConsider the following statements:
- Mitochondrial Replacement TherapyIn the context of hereditary diseases, consider the following statements:
- Bollgard Bt CottonBollgard I and Bollgard II technologies are mentioned in the context of
- Germline Gene TherapyConsider the following statements:
- Pronuclear TransferIn the context of recent advances in human reproductive technology, 'Pronuclear Transfer' is used for
- Patents Act Biological ProcessesConsider the following statements:
- RNA InterferenceRNA interference (RNAi)' technology has gained popularity in the last few years. Why?
- Cas9 Gene EditingWhat is Cas9 protein that is often mentioned in news?
- GM MustardWith reference to the Genetically Modified mustard (GM mustard) developed in India, consider the following statements:
- Plant Disease SpreadConsider the following:
- Somatic Cell Nuclear TransferWhat is the application of Somatic Cell Nuclear Transfer Technology?
- Genome Sequencing AgricultureWith reference to agriculture in India, how can the technique of ‘genome sequencing’, often seen in the news, be used in the immediate future?
- Transcriptome BioinformaticsIn the context of the developments in Bioinformatics, the term ‘transcriptome’, sometimes seen in the news, refers to
- Railway Bio ToiletsWith reference to bio-toilets used by the Indian Railways, consider the following statements:
- Techniques for Transgenic CropsConsider the following techniques/phenomena:
- Maize Starch Biodiesel AlcoholConsider the following statements:
- Mycorrhizal BiotechnologyMycorrhizal biotechnology has been used in rehabilitating degraded sites because mycorrhiza enables the plants to: