Q341. The evolution from 1G to 2G in mobile technology was primarily marked by the transition from:
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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Q342. Consider the following features promoted in 5G technology:
I. Significantly lower latency compared to 4G.
II. Higher data transfer speeds (multi-Gbps peak rates).
III. Ability to connect a massive density of devices concurrently.
IV. Complete elimination of electromagnetic radiation.
Which of the above statement(s) is/are correct?
I. Significantly lower latency compared to 4G.
II. Higher data transfer speeds (multi-Gbps peak rates).
III. Ability to connect a massive density of devices concurrently.
IV. Complete elimination of electromagnetic radiation.
Which of the above statement(s) is/are correct?
Explanation
5G technology introduces significantly higher data speeds, much lower latency, and the ability to connect a massive number of devices simultaneously compared to previous generations. These improvements enable advanced applications like real-time remote surgery and autonomous driving. While highly efficient, 5G does not eliminate electromagnetic radiation, which is a fundamental property of the radio frequency waves used for.
Q343. Identify the incorrect statement comparing 4G LTE and VoLTE.
Explanation
Voice over LTE (VoLTE) is a technology that allows voice calls to be transmitted as data packets over the 4G network, offering significantly better call quality and faster connection times than older 2G or 3G systems. Prior to VoLTE, 4G phones had to drop back to older networks for calls. Contrary to the incorrect statement, VoLTE markedly.
Q344. In 5G technology, the concept of dividing a single physical network into multiple virtual networks optimized for different specific uses (e.g., autonomous driving vs. smart meters) is known as:
Explanation
Network slicing is a key feature of 5G that allows a single physical network infrastructure to be divided into multiple virtual networks, each optimized for specific performance requirements. For example, one slice can be dedicated to low-latency autonomous driving, while another handles high-bandwidth video streaming. This flexibility ensures that diverse applications can coexist on the same network.
Q345. GSM and CDMA are dominant standards associated primarily with which era of mobile network generations?
Explanation
GSM and CDMA were the two dominant and competing standards during the second and third generations of mobile networks. While GSM became the global standard for digital voice and SMS, CDMA was widely used in specific regions for its efficient data handling. These technologies laid the groundwork for the mobile web before being largely superseded by the unified.
Q346. Which pair correctly matches the mobile network generation with its hallmark technological capability?
Explanation
Each mobile generation is defined by a major technological leap. 3G was the first generation to make mobile broadband and web browsing a reality for the general public, moving beyond the simple voice and text of 2G. While 1G provided basic analog voice and 4G introduced high-speed LTE, 3G was the essential bridge to the modern smartphone.
Q347. Given below are two statements regarding 5G technology.
Statement I: Massive MIMO (Multiple Input, Multiple Output) is a key technology used in 5G.
Statement II: Massive MIMO uses a large number of antennas at the base station to increase network capacity and efficiency.
Which of the above statement(s) is/are correct?
Statement I: Massive MIMO (Multiple Input, Multiple Output) is a key technology used in 5G.
Statement II: Massive MIMO uses a large number of antennas at the base station to increase network capacity and efficiency.
Which of the above statement(s) is/are correct?
Explanation
Massive MIMO is a fundamental technology in 5G that utilizes a large number of antennas at the base station to send and receive more data simultaneously. This approach significantly increases network capacity and improves signal quality for users. By focusing signals directly toward specific devices, Massive MIMO enhances overall efficiency, allowing 5G networks to handle the massive data.
Q348. Match List I with List II.
| Mobile Generation | Key Feature |
|---|---|
| A. 1G | i. Digital voice and SMS |
| B. 2G | ii. High-speed IP-based network (LTE) |
| C. 3G | iii. Analog voice |
| D. 4G | iv. Mobile broadband and apps |
Explanation
The evolution of mobile networks is marked by distinct features: 1G used analog voice, 2G introduced digital voice and SMS, 3G brought mobile broadband, and 4G provided high-speed IP-based LTE networks. Each generation has expanded the capabilities of mobile devices, from simple communication tools to powerful multimedia platforms, reflecting the rapid pace of global telecommunications innovation.
Q349. Which of the following is not typically cited as a primary use-case requiring the advanced capabilities of 5G technology?
Explanation
5G is designed for high-performance applications that require massive bandwidth or ultra-low latency, such as remote robotic surgery, autonomous vehicles, and high-definition augmented reality. These use-cases leverage the advanced capabilities of the new network. In contrast, sending basic text-only emails is a simple task that can be easily handled by older 2G or 3G networks.
Q350. What does the term "latency" most appropriately refer to in the context of 5G networks?
Explanation
In mobile networking, latency refers to the time it takes for a data packet to travel from its source to its destination and back. Low latency is a hallmark of 5G, enabling near-instantaneous communication between devices. This is critical for time-sensitive applications like online gaming or real-time control of industrial machinery, where even a tiny delay.Answer key for these questions
| Q | Correct answer |
|---|---|
| 341 | (c) Analog signals to digital signals |
| 342 | (a) I, II, and III only |
| 343 | (a) VoLTE heavily decreases voice call quality compared to 2G networks. |
| 344 | (b) Network Slicing |
| 345 | (b) 2G and 3G |
| 346 | (a) 3G - Introduction of mobile web browsing and data services |
| 347 | (a) Both Statement I and II are correct |
| 348 | (a) A-iii, B-i, C-iv, D-ii |
| 349 | (c) Sending basic text-only emails |
| 350 | (b) Signal response time delay |
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.