The terms 'Ethereum, Solana, Polkadot and Tether', sometimes mentioned in the news, refer to
- A.Cryptocurrencies
- B.Earth Observation Satellites
- C.Hypersonic Cruise Missiles
- D.Virtual Private Network service providers
Correct answer
Explanation
The correct answer is A, Cryptocurrencies. Ethereum, Solana, Polkadot and Tether are all names from the world of blockchain-based digital currencies. A cryptocurrency is a digital asset recorded on a blockchain, a shared ledger kept by many computers, and secured by cryptography rather than issued by a central bank. Ethereum, launched in 2015, introduced smart contracts, and its coin is called Ether; Solana and Polkadot are newer blockchains, each with its own coin (SOL and DOT); Tether (USDT) is a stablecoin, a token designed to keep its value at one US dollar. Bitcoin, launched in 2009, was the first cryptocurrency. Option B is wrong because Earth observation satellites carry names such as Cartosat, Resourcesat or Landsat. Option C is wrong because hypersonic cruise missiles have names such as BrahMos-II or Zircon. Option D is wrong because these names do not belong to VPN services, which hide and secure internet traffic. Exam tip: Bitcoin was the first cryptocurrency (2009); Tether is a dollar-linked stablecoin.
Practice Questions
View allThe term 'Thermal High Altitude Area Defense', sometimes mentioned in news, refers to
- A.Anti-Missile system.
- B.Air-launched cruise missile.
- C.Aircraft navigation system.
- D.Surface-to-air guided weapon.
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THAAD, properly the Terminal High Altitude Area Defense, is a United States system built to shoot down ballistic missiles in the last, or terminal, phase of their flight.
Read the full explanation →The terms 'Pinaka and Smerch' mentioned in news recently refer to
- A.Cruise missiles
- B.Nuclear-powered submarines
- C.Rocket launcher systems
- D.Weaponised drones
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Pinaka and Smerch are both multi-barrel rocket launchers used by the Indian Army's artillery. Pinaka was developed by DRDO, with the Armament Research and Development Establishment at Pune as the lead laboratory, and is named after the bow of Lord Shiva.
Read the full explanation →P-75I (or P-75 India) project refers to manufacture of
- A.Diesel-electric submarines.
- B.Nuclear-powered submarines.
- C.Aircraft carrier warships.
- D.Field guns.
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Project 75 India, or P-75I, is the Indian Navy's plan to build six advanced conventional diesel-electric submarines in India. Its key requirement is Air Independent Propulsion, which lets a conventional submarine stay submerged for much longer without surfacing to charge its batteries.
Read the full explanation →Which of the following statements about India's military arsenal is/are correct ? 1. HAMMER is a weapon system built for the Rafale fighter aircraft. 2. SCALP cruise missile is also known as Storm Shadow. 3. BrahMos missiles are built under a joint venture between India and Russia. Select the answer using the code given below :
- A.1 and 2 only
- B.2 and 3 only
- C.1, 2 and 3
- D.3 only
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All three statements describe the weapons correctly. HAMMER, short for Highly Agile Modular Munition Extended Range, is a French precision-guided air-to-ground bomb kit made by Safran; India bought it to arm its Rafale jets, which can strike targets tens of kilometres away with it.
Read the full explanation →India's Gas Turbine Research Establishment (GTRE), part of the Defence Research and Development Organisation (DRDO) has developed an aero-engine which will potentially make India self-reliance in aero-engine technology. What is the name of the engine?
- A.Ganga
- B.Yamuna
- C.Krishna
- D.Kaveri
Show answer
Kaveri is the turbofan aero-engine developed by the Gas Turbine Research Establishment of DRDO in Bengaluru. The Kaveri project began in the late 1980s to power the Light Combat Aircraft Tejas.
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