NDA GK Questions 2026

XR is the collective name for augmented reality, virtual reality and mixed reality together, and is used whenever a statement is meant to cover all the technologies that blend the physical world with digital content.

In augmented reality the room, street or object in front of the user stays visible and images, text or sound are added on top of it, as when a camera labels a monument or a windscreen display shows directions.

He popularised the phrase virtual reality in the late 1980s while building and selling some of the first commercial headsets and data gloves, and the name has stuck to the technology ever since.

The novel, published in 1992, uses the word metaverse for a shared virtual city that people enter through goggles and move about in as avatars, and the term was taken up decades later for persistent three-dimensional online worlds.

Milling on a computer-controlled machine is a subtractive process: a rotating cutter removes material from a solid block until the shape remains, so no layers are added.

An STL file describes the outer surface of a three-dimensional object as a mesh of triangles and carries no colour, material or texture information.

He invented stereolithography in the mid-1980s, in which a laser hardens liquid photopolymer resin point by point, and in doing so built the first working 3D printer; he also went on to found a company to sell the machines.

The name comes from the method: material is added layer upon layer under the control of a digital model until the object is complete, so that nothing has to be cut away.

The initiatives he cited as creating capability in emerging fields were the Deep Ocean Mission, the Quantum Mission, artificial intelligence, cyber security and the Anusandhan National Research Foundation, so options A, B and C all appear on that list.

The minister referred to this target together with the opening of the nuclear sector to private participation, and described nuclear power as an important clean-energy source for future requirements, among them the demand created by artificial intelligence and data centres.

The minister described this as the current size of the space economy and said it could reach USD 45 to 46 billion over the next 8 to 10 years if the present momentum continues, crediting the expansion to the opening of the sector and the entry of a wider set…

The correct answer is Group Captain Manish Sharma, who led the Air Force Day Parade at Hindan.

Five unit citations were presented at the investiture ceremony that followed the parade, and they went to 24 Squadron 'The Hawks', 110 Helicopter Unit 'The Vanguards', 200 Squadron 'Skanda', 2402 Squadron 'Vajra' and the Electronic Warfare Range.

The air chief explained that the three words are not a tagline but a statement of the force’s strength and resolve, matching its promise to guard the country’s skies with precision, resilience and operational excellence.

The force completed 94 years of service on 8 October 2026 and held its ceremonial Air Force Day parade at Hindan, where the Chief of the Air Staff, Air Chief Marshal AP Singh, reviewed the parade in the presence of the Army and Navy chiefs, former air chiefs and other…

Their presence at the exercise off Paradip was treated as a notable step towards stronger cooperation between nations on rescue at sea, because it allowed an exchange of working practices, improved the ability of different forces to operate together, and underlined that India is relied upon as a search and…

That was the theme chosen for the 12th National Maritime Search and Rescue Exercise off Paradip, and it was borne out on the day by the demonstration of a Remotely Operated Vehicle and by the stress placed on a faster, technology-enabled and seamlessly coordinated rescue framework.

The Indian Coast Guard conducted the 12th edition of the National Maritime Search and Rescue Exercise in the sea off Paradip on 8 October 2026, and the Paradip Port Authority along with the Odisha state administration took part in it.

In December 2020 Nepal and China announced a jointly agreed new height for Mount Everest of 8,848.86 metres, after separate surveys from the two sides.

Shiva Keshavan, from Himachal Pradesh, competed in the luge at six Winter Olympic Games beginning in 1998 and won titles at the Asian level, which makes him India's best known winter Olympian.