ULSI microprocessor is used in which generation of computers ?
Answer: D
ULSI microprocessors belong to the fifth generation.
Ultra large scale integration puts millions of transistors on one chip. The fourth generation used VLSI, the third integrated circuits, the second transistors and the first vacuum tubes.
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Who invented C++ ?
Answer: B
Bjarne Stroustrup created C++, at Bell Labs from 1979.
He added classes and object-oriented features to C while keeping its efficiency and its access to the machine. It was first called 'C with Classes' and renamed C++ in 1983.
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'CD' computer abbreviation usually means ?
Answer: D
CD stands for compact disc.
Philips and Sony developed it jointly and launched it in 1982. A 120 mm disc holds about 700 MB, read by a laser from a spiral of pits five kilometres long.
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Which of these is a documented hoax virus?
Answer: A
The McDonald's screensaver is a documented hoax virus.
A hoax is a chain email warning of a virus that does not exist and asking the reader to forward it. The forwarding is the damage: it wastes attention and can panic users into deleting genuine system files.
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A value used in a formula that does not change is called a -
Answer: B
A value in a formula that does not change is a constant.
In a spreadsheet a constant is typed directly into the formula, such as the 0.18 in =A1*0.18. A variable is a cell reference, whose value can change.
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What does AC and DC stand for in the electrical field?
Answer: A
AC is alternating current and DC is direct current.
In alternating current the direction reverses periodically - 50 times a second in India - which is what allows transformers to change the voltage for transmission. Direct current flows one way only, as from a battery.
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What is meaning of LAT ?
Answer: A
LAT stands for Local Area Transport.
It was DEC's protocol for connecting terminals to hosts over Ethernet in the 1980s. Being non-routable, it worked only within a single local network.
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In computer what converts AC to DC ?
Answer: A
The SMPS converts AC to DC in a computer.
The switch mode power supply rectifies the mains, chops it at tens of kilohertz, transforms it with a small high-frequency transformer and rectifies again, giving the 12 V, 5 V and 3.3 V rails efficiently and without a heavy mains transformer.
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My Computer was introduced from
Answer: C
My Computer was introduced in Windows 95.
It appeared with the new shell of 1995, alongside the Start menu, the taskbar and the Recycle Bin, giving a single icon from which every drive could be reached. It was renamed This PC in Windows 8.1.
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Red Hat Linux is
Answer: B
Red Hat Linux is an operating system.
It is a distribution of Linux aimed at enterprise use, packaging the kernel with GNU tools, a package manager and long-term support. Red Hat's business model is selling support rather than the software itself.
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