Q1291. Identify the odd one out among these communication protocols.
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Q1292. Given below are two statements regarding IoT components.
Statement I: In IoT, sensors are used to collect data from the environment (e.g., temperature).
Statement II: Actuators are used to perform a physical action based on the data (e.g., turning on a motor).
Which of the above statement(s) is/are correct?
Statement I: In IoT, sensors are used to collect data from the environment (e.g., temperature).
Statement II: Actuators are used to perform a physical action based on the data (e.g., turning on a motor).
Which of the above statement(s) is/are correct?
Explanation
IoT systems rely on two primary types of hardware to interact with the world. Sensors are used to gather information from the environment, such as light, temperature, or motion. Actuators, conversely, are used to perform physical actions based on that data, such as opening a valve or turning on a light. Together, these components allow IoT systems to.
Q1293. Which of the following is not directly a functional component required for an IoT device to operate?
Explanation
Operating an IoT device requires core components like sensors for data collection, network connectivity for communication, and a processing unit to manage operations. These elements work together to enable the device’s "smart" functionality. Mechanical punch cards are an obsolete technology used in early computer generations for data entry and have no role in the digital, wireless architecture.
Q1294. What was a major structural effect on network infrastructure driven by the rapid proliferation of IoT devices?
Explanation
The rapid proliferation of billions of IoT devices created a massive demand for unique IP addresses, far exceeding the capacity of the aging IPv4 system. This directly drove the global adoption of IPv6, which offers a virtually unlimited number of addresses. By providing a unique identifier for every connected object, IPv6 ensures that the IoT ecosystem can.
Q1295. The evolution from 1G to 2G in mobile technology was primarily marked by the transition from:
Explanation
The transition from the first generation (1G) to the second generation (2G) of mobile technology was defined by the shift from analog to digital signal transmission. While 1G was limited to analog voice calls, 2G introduced digital clarity, improved security through encryption, and enabled new services like SMS text messaging. This digital foundation was essential for all.
Q1296. 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.
Q1297. 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.
Q1298. 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.
Q1299. 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.
Q1300. 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.Answer key for these questions
| Q | Correct answer |
|---|---|
| 1291 | (c) HDMI |
| 1292 | (a) Both Statement I and II are correct |
| 1293 | (d) Mechanical punch cards |
| 1294 | (b) Adoption of the IPv6 protocol |
| 1295 | (c) Analog signals to digital signals |
| 1296 | (a) I, II, and III only |
| 1297 | (a) VoLTE heavily decreases voice call quality compared to 2G networks. |
| 1298 | (b) Network Slicing |
| 1299 | (b) 2G and 3G |
| 1300 | (a) 3G - Introduction of mobile web browsing and data services |
Frequently asked questions
How many RAS Prelims practice MCQs are there on RAS Prelims?
This page has 9654 practice MCQs on the RAS Prelims syllabus. Each has the correct answer, and most have an explanation.
How should I practise MCQs for RAS Prelims?
Attempt each question first, then open the answer and read the explanation. Practise one chapter at a time, note the facts you got wrong and revise them. Repeat the chapter after a few days.
Are these actual RAS Prelims past-paper questions?
No. These are practice questions written for the RAS Prelims syllabus. They follow the pattern the exam uses: factual questions, statement-based questions, match-the-list and assertion-reason.