Computer Awareness GK Questions with Answers – Page 13

At the transmitting end of a fibre link the electrical signal must be turned into light, and the two devices that do it are the light-emitting diode and the laser diode.

An optical fibre carries information as pulses of light, not as an electric current, so its core and cladding must be transparent and not conducting.

SAGA-220 was built by the Indian Space Research Organisation in 2011 using graphics processing units, so that pair is correct.

A supercomputer's performance is stated in FLOPS, the number of floating point calculations it completes in a second, which is why the figures appear as teraflops, petaflops and exaflops; a petaflop is a thousand trillion such operations a second.

Pratyush was installed at the Indian Institute of Tropical Meteorology in Pune in 2018, with a companion system, Mihir, at the National Centre for Medium Range Weather Forecasting, and the pair was acquired to run high-resolution models for monsoon forecasting, cyclone tracks and climate studies.

The National Supercomputing Mission, approved in 2015, is steered jointly by the Ministry of Electronics and Information Technology and the Department of Science and Technology, and it is implemented by the Centre for Development of Advanced Computing at Pune together with the Indian Institute of Science at Bengaluru.

PARAM Shivay, commissioned in 2019 at the Indian Institute of Technology at Banaras Hindu University in Varanasi, was the first supercomputer installed under the National Supercomputing Mission, which was approved in 2015.

The Education and Research Network, ERNET, was begun in 1986 by the Department of Electronics with support from the United Nations Development Programme to link universities, the Indian Institutes of Technology and research laboratories, and it carried the first academic internet traffic in India.

ECIL was set up at Hyderabad in 1967 under the Department of Atomic Energy to make electronic equipment for the atomic energy programme, and it produced the TDC series, the Trombay Digital Computers, for laboratory and industrial use.

The HEC-2M, brought from Britain, was installed at the Indian Statistical Institute in 1955 and is counted as the first computer to work in India; the institute later added a Soviet URAL machine and in 1966 built the ISIJU with Jadavpur University.

C-DAC was established at Pune in 1988 under the Department of Electronics, with a mission to design and build an indigenous supercomputer after the United States declined to supply a Cray machine to India.

Vijay Bhatkar led the team at C-DAC that built PARAM 8000 in 1991 and is therefore described as the architect of India's PARAM series of supercomputers.

The Centre for Development of Advanced Computing was set up at Pune in 1988 with the specific task of building an indigenous supercomputer after India was refused an American Cray machine, and in 1991 its team completed PARAM 8000, a parallel computer assembled from transputer processors.

The TIFR Automatic Calculator was completed at the Tata Institute of Fundamental Research in Mumbai in 1960 and is counted as the first digital computer designed and built in India; Jawaharlal Nehru gave it the name TIFRAC.

When an incognito window is closed, the browser throws away the list of pages visited in it, the cookies the sites placed and whatever was typed into forms, so that the next person at the same computer finds no trace.

Mosaic was written at the National Center for Supercomputing Applications in the United States by a team that included Marc Andreessen, and it was the first browser to show pictures inside the page alongside the text instead of in a separate window, which is why it is credited with carrying…

The method counts the links pointing at a page and weighs each link by the importance of the page it comes from, so that a page linked by many respected pages rises in the results.

A crawler, also called a spider or a bot, starts from a list of addresses, fetches each page, follows the links it finds and hands the pages over to be indexed; without it a search engine would have nothing to search.

The top-level domain is the last part of a domain name, and.org was set aside for organisations, particularly non-commercial and non-profit bodies, when the first domains were created.

A cookie holds a few lines of text, such as a session number or a chosen language, and the browser sends it back to the same site on the next visit, which is how a shopping cart or a logged-in session survives from one page to the next.