Q391. How does Augmented Reality (AR) fundamentally differ from Virtual Reality (VR)?
Science and Technology: RAS Prelims MCQs
1113 RAS Prelims practice MCQs on science and technology are on this page, in 6 chapters. They cover the basics of everyday science, computers and information technology, defence and space technology in India, genetics, biotechnology and nanotechnology, science and technology policies and government programmes, and recent advances with Indian contributors and indigenisation. Each question has an answer and an explanation.
Practice questions based on the RPSC RAS Prelims syllabus. They follow the exam pattern but are not past-paper questions.
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Q392. Consider the following concepts related to Quantum Computing:
I. Qubits (Quantum bits) can exist in multiple states simultaneously due to superposition.
II. Entanglement allows qubits that are separated by distance to interact instantaneously.
III. Quantum computers perform calculations identically to classical binary computers, just faster.
IV. Quantum computing poses a future threat to current cryptographic standards (like RSA).
V. Decoherence is a major challenge in maintaining quantum states.
Which of the above statement(s) is/are correct?
I. Qubits (Quantum bits) can exist in multiple states simultaneously due to superposition.
II. Entanglement allows qubits that are separated by distance to interact instantaneously.
III. Quantum computers perform calculations identically to classical binary computers, just faster.
IV. Quantum computing poses a future threat to current cryptographic standards (like RSA).
V. Decoherence is a major challenge in maintaining quantum states.
Which of the above statement(s) is/are correct?
Explanation
Quantum computing utilizes qubits that can exist in multiple states simultaneously due to superposition and interact via entanglement. These systems perform calculations fundamentally differently from classical computers, posing a significant future threat to current encryption standards like RSA. While powerful, quantum computers face the major challenge of decoherence, where external interference disrupts the fragile quantum states needed for.
Q393. Identify the incorrect statement regarding the "Metaverse."
Explanation
The Metaverse is envisioned as a decentralized network of interconnected 3D virtual worlds where users can interact socially and economically. It often incorporates technologies like VR, AR, and blockchain-based digital assets. It is not owned or controlled by any single government or corporation; instead, it is expected to be a collaborative ecosystem developed by many different.
Q394. A surgeon uses a specialized headset during an operation that projects real-time 3D MRI scans precisely over the patient’s body, and the surgeon can interact with these holograms. This is an application of:
Explanation
Mixed Reality is a technology that blends the physical and digital worlds, allowing real and virtual objects to coexist and interact in real-time. A surgeon using a headset to project and interact with 3D MRI scans over a patient’s body is a prime example. Unlike pure VR, MR keeps the user connected to the real environment while.
Q395. In the context of quantum computing, the term "Quantum Supremacy" refers to:
Explanation
Quantum Supremacy is a milestone in computer science reached when a quantum computer performs a specific calculation that is practically impossible for the most powerful classical supercomputer to complete in a reasonable timeframe. This achievement demonstrates the fundamental power of quantum mechanics to solve certain types of complex problems far more efficiently than traditional binary-based computing architectures.
Q396. The technology that involves constructing a three-dimensional solid object from a digital file by successively adding material layer by layer is known as:
Explanation
3D printing, also known as additive manufacturing, is a process that creates three-dimensional solid objects by adding material layer by layer from a digital file. This is the opposite of traditional subtractive manufacturing, which involves cutting away material. 3D printing allows for the creation of complex shapes and customized parts, revolutionizing prototyping, manufacturing, and even medical.
Q397. Given below are two statements regarding quantum communication.
Statement I: Quantum cryptography relies on the principles of quantum mechanics to secure data.
Statement II: The fundamental property used in Quantum Key Distribution (QKD) is that observing or measuring a quantum state alters it, thus revealing any eavesdropping attempts.
Which of the above statement(s) is/are correct?
Statement I: Quantum cryptography relies on the principles of quantum mechanics to secure data.
Statement II: The fundamental property used in Quantum Key Distribution (QKD) is that observing or measuring a quantum state alters it, thus revealing any eavesdropping attempts.
Which of the above statement(s) is/are correct?
Explanation
Quantum cryptography uses the laws of physics to provide exceptionally secure data transmission. A key method is Quantum Key Distribution, which relies on the fact that any attempt to observe or measure a quantum state will fundamentally alter it. This ensures that any eavesdropping is immediately detected, providing a level of security that is theoretically impossible to.
Q398. Which of the following correctly describes a practical application of IoT and AR combined in industrial maintenance?
Explanation
Combining IoT and AR in industrial settings can significantly improve maintenance and efficiency. For example, a technician wearing smart glasses can see real-time data from IoT sensors overlaid directly onto the machinery they are repairing. This "heads-up" display provides vital information and instructions without the technician needing to look away from their work, reducing errors.
Q399. Which of the following is NOT a typical feature or requirement for experiencing true Virtual Reality (VR)?
Explanation
True Virtual Reality requires a head-mounted display and motion tracking sensors to create a fully immersive 360-degree digital environment. This immersive experience is achieved by completely blocking out the user’s view of the physical real-world surroundings and replacing it with computer-generated visuals. If a user can still see the physical world clearly, it is not.
Q400. What is a highly anticipated effect of mature quantum computing on current global cybersecurity infrastructure?
Explanation
Mature quantum computing is expected to have a profound effect on global cybersecurity because its immense processing power could easily break the mathematical problems that protect current asymmetric encryption standards. This would make many existing security protocols obsolete, requiring the development and implementation of new, quantum-resistant cryptographic methods to protect sensitive data and.Answer key for these questions
| Q | Correct answer |
|---|---|
| 391 | (a) Real-world overlay vs fully immersive environment |
| 392 | (a) I, II, IV, and V only |
| 393 | (b) It is entirely owned and controlled by a single government entity globally. |
| 394 | (a) Mixed Reality (MR) |
| 395 | (c) Beyond classical capability |
| 396 | (d) 3D Printing (Additive Manufacturing) |
| 397 | (a) Both Statement I and II are correct |
| 398 | (b) Smart glass sensor overlays |
| 399 | (d) Complete sensory visibility of the physical real-world environment |
| 400 | (a) Asymmetric encryption obsolescence |
Key facts from Science and Technology
- The RPSC paper is General Knowledge and General Science, so science questions come with a strong dose of applied and recent topics.
- Everyday science questions test the laws and terms of physics, chemistry and biology through examples.
- Defence and space questions pair a missile, satellite or mission with its year and organisation.
- Policy questions ask for the year, the body and the aim of schemes like STIP, the National Quantum Mission and BioE3.
- Health, environment and agriculture are on a separate page, with their own chapters.
Frequently asked questions
How many RAS Prelims practice MCQs are there on Science and Technology?
This page has 1113 practice MCQs on Science and Technology. Each has the correct answer, and most have an explanation.
Which chapters does the science and technology set cover?
Six chapters: basics of everyday science; computers, information and communication technology; defence and space technology in India; genetics, biotechnology and nanotechnology; science and technology policies and government programmes; and recent advances, Indian contributors and indigenisation.
Is science and technology part of the RAS Prelims syllabus?
Yes. The RPSC paper is called General Knowledge and General Science, and its syllabus lists science and technology topics along with environment, health, agriculture and government programmes, so questions can come from any of these areas.
How should I prepare science for RAS Prelims?
Revise the concepts by examples, then learn the missions, schemes and scientists with their year and organisation. Attempt each chapter, read the explanations and keep a list of the facts you missed.