UPSC Prelims 2018 Analysis

Explanation

The scenario described involves various devices (smartphone, geyser, smart mirror, refrigerator, car, etc.) communicating with each other and with the user, and automatically performing tasks based on certain triggers. This is characteristic of the Internet of Things (IoT).

Internet of Things (IoT) is a system of interrelated computing devices, mechanical and digital machines, objects, animals or people that are provided with unique identifiers (UIDs) and the ability to transfer data over a network without requiring human-to-human or human-to-computer interaction.

Border Gateway Protocol is a protocol used to exchange routing information across the internet and is not relevant to the scenario described.

Internet Protocol is a set of rules for sending and receiving messages at the Internet address level, but it doesn't cover the broad range of device intercommunication described in the scenario.

A Virtual Private Network is a technology for using the internet or another intermediate network to connect computers to isolated remote computer networks that would otherwise be inaccessible, which also doesn't fit the scenario.

Explanation

3D printing, also known as additive manufacturing, is a process of making three dimensional solid objects from a digital file. It is used in a wide range of industries and has various applications.

It can be used to create intricate and customized shapes in confectionery items like chocolates, candies, and other desserts.

It has been used to create customized bionic ears for people with hearing impairments.

It is used in the automotive industry for rapid prototyping, manufacturing of customized parts, and even some production of vehicle components.

It is used in reconstructive surgeries to create patient-specific implants, prosthetics, and surgical guides.

It can be used to create specialized components and parts for data processing technologies, such as computer hardware.

Therefore, all the five statements are correct.

Explanation

According to Einstein's General Theory of Relativity, gravity can bend light. This phenomenon is known as gravitational lensing.

The General Theory of Relativity led to the prediction of an expanding universe, which has been confirmed by observational evidence.

According to the General Theory of Relativity, the presence of matter and energy warps the fabric of space and time around it, which is the underlying cause of the gravitational force.

So, all three statements are correct.

Explanation

All of the listed factors - birds, dust blowing, rain, and wind blowing - can contribute to the spread of plant diseases

Birds can act as vectors, carrying and spreading plant pathogens from one location to another through their feathers, feet, or droppings.

Dust and soil particles blown by the wind can carry and spread plant diseases, especially fungal spores and bacterial cells.

Rain can splash and disperse plant pathogens, such as fungi and bacteria, from the soil or infected plant parts to uninfected plants.

Wind can transport and spread airborne plant pathogens, such as fungal spores and bacterial cells, over long distances.

Explanation

The availability of open APIs for Aadhaar means that the Aadhaar system can be easily integrated into various electronic devices, such as smartphones, laptops, point-of-sale terminals, etc. This allows these devices to leverage the Aadhaar platform for authentication and other services.

The Aadhaar APIs provide the capability to perform online authentication using biometric modalities like fingerprint and iris scans. This allows for secure identity verification and authentication through electronic devices and applications.

Therefore, both statements 1 and 2 are correct.

Explanation

The Belle II experiment is a particle physics experiment designed to study the properties of B mesons. It is not related to artificial intelligence.

Blockchain technology is the underlying technology behind cryptocurrencies like Bitcoin. It is a distributed ledger technology that ensures secure and transparent transactions.

CRISPR-Cas9 is a gene-editing technology used in the field of molecular biology to edit genes. It is not related to particle physics.

Therefore, only pair 2 is correctly matched.

Explanation

The terms 'WannaCry, Petya and EternalBlue' are all related to cyber attacks.

'WannaCry' is a ransomware that locks users' devices and prevents them from accessing data and software until a certain ransom is paid to its creator.

'Petya' is another type of ransomware that spreads rapidly through networks that use Microsoft Windows.

The Petya and WannaCry cyber-attacks in May and June 2017 are two of the biggest in history and impacted the finances of companies throughout the globe.

'EternalBlue' is a cyber exploit developed by the U.S. National Security Agency (NSA). It was used in the 2017 WannaCry ransomware attack and exploits a vulnerability in the Microsoft implementation of the Server Message Block (SMB) Protocol.

Explanation

IRNSS is an independent regional navigation satellite system being developed by India.

The Indian Regional Navigation Satellite System (IRNSS) indeed has three satellites in geostationary orbits and four satellites in geosynchronous orbits.

It is designed to provide accurate position information service to users in India as well as the region extending up to 1500 km from its boundary, which is its primary service area. An Extended Service Area lies between primary service area and area enclosed by the rectangle from Latitude 30 deg South to 50 deg North, Longitude 30 deg East to 130 deg East.

While India has been working on enhancing the coverage of its navigation system, as of the given timeframe (2019), it does not have full global coverage. The system is primarily regional, although there are plans for augmentation and expansion.

Explanation

GPS, or Global Positioning System, is a satellite-based navigation system that provides geolocation and time information to a GPS receiver anywhere on or near the Earth. It has a wide range of applications.

Statement 1 is correct. GPS is used in mobile phones for various purposes such as location tracking, navigation, and location-based services.

Statement 2 is correct. GPS is used in banking operations for ATM location services and for time-stamping transactions, which is crucial for maintaining accurate records.

Statement 3 is correct. GPS is used for time-stamping power system measurements, which is vital for grid stability and synchronization. Therefore, GPS technology can be used in all the three areas mentioned.

Explanation

Statement 1 is correct. PSLV (Polar Satellite Launch Vehicle) is primarily used to launch Earth observation/monitoring satellites, while GSLV (Geosynchronous Satellite Launch Vehicle) is designed to launch communication satellites into geosynchronous transfer orbits.

Statement 2 is incorrect. Satellites launched by PSLV are typically placed in polar or sun-synchronous orbits, which are not geosynchronous. These satellites appear to move across the sky as viewed from a particular location on Earth.

Statement 3 is incorrect. The GSLV Mk III is a three-stage launch vehicle, not a four-stage one. The first stage uses solid rocket motors, the second stage uses liquid rocket engines, and the third stage uses a cryogenic rocket engine.

Explanation

THAAD is a missile defense system developed by the United States to intercept and destroy short, medium, and intermediate-range ballistic missiles during their terminal phase of flight.

It is designed to defend against threats both within and outside the Earth's atmosphere, providing protection against potential missile attacks.

THAAD has been deployed by the United States military and has also been sold to allied countries such as South Korea and Saudi Arabia.

Explanation

Dhara Mustard Hybrid-11, otherwise known as DMH - 11, is a genetically modified hybrid variety of the mustard species Brassica juncea.

Statement 1 is incorrect. The GM mustard developed in India does not have the property of pest-resistance. It has been genetically modified for hybridization and increased yield, not for pest-resistance.

Statement 2 is correct. The GM mustard has been developed with genes that allow it to cross-pollinate, leading to hybridization and increased yield.

Statement 3 is incorrect. The GM mustard was developed by scientists at Delhi University’s Centre for Genetic Manipulation of Crop Plants (CGMCP), not by the IARI and Punjab Agricultural University.

So, only statement 2 is correct.