Where is the headquarters of Intel located?
Answer: C
Intel is headquartered at Santa Clara, California, in Silicon Valley.
Robert Noyce and Gordon Moore founded it in 1968. Its 4004 of 1971 was the first commercial microprocessor, and the x86 line has dominated personal computing since 1981.
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'OS' computer abbreviation usually means ?
Answer: C
OS stands for operating system.
It is the software that manages the hardware and provides services to applications - scheduling processes, allocating memory, handling files and driving devices. Windows, Linux, macOS and Android are examples.
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What is the relationship between resistivity r and conductivity s?
Answer: D
Resistivity and conductivity are reciprocals: \( \rho = 1/\sigma \).
Resistivity is measured in ohm metres and conductivity in siemens per metre. Copper's resistivity is about \( 1.7 \times 10^{-8}\ \Omega\,\mathrm{m} \), which is why it is used for wiring.
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Most modern TV's draw power even if turned off. The circuit the power is used in does what function?
Answer: B
A television left on standby draws power for its remote control receiver.
The infrared sensor and the small circuit that watches it must stay powered so the set can respond to the on button. Multiplied across a household, such standby loads are a measurable share of domestic electricity use.
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Which is a type of Electrically-Erasable Programmable Read-Only Memory?
Answer: A
Flash memory is a type of electrically erasable programmable read-only memory.
It is erased in blocks rather than byte by byte, which makes it much faster than earlier EEPROM. It holds its contents without power, and is what USB drives, SSDs and memory cards are made of.
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The purpose of choke in tube light is ?
Answer: D
The choke in a tube light increases the voltage momentarily.
When the starter opens, the current through the inductor is interrupted and it generates a high voltage surge, \( V = -L\,di/dt \), which strikes the arc in the tube. Once running, the choke limits the current.
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The first step to getting output from a laser is to excite an active medium. What is this process called?
Answer: A
Exciting the active medium of a laser is called pumping.
Energy is fed in optically, electrically or chemically to raise more atoms to the upper level than remain in the lower one - a population inversion, without which stimulated emission cannot outrun absorption.
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Who developed Yahoo?
Answer: B
David Filo and Jerry Yang developed Yahoo, in 1994, as PhD students at Stanford.
It began as 'Jerry and David's Guide to the World Wide Web', a hand-built directory of sites, and was the dominant web portal of the late 1990s.
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The most common format for a home video recorder is VHS. VHS stands for...?
Answer: A
VHS stands for Video Home System.
JVC introduced it in 1976, and it won the format war against Sony's Betamax chiefly by offering longer recording time and licensing the format widely.
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'.JPG' extension refers usually to what kind of file?
Answer: D
A .JPG file is an image file.
JPEG, the Joint Photographic Experts Group format, compresses photographs by discarding detail the eye is least sensitive to. The compression is lossy, so quality falls a little each time a file is re-saved.
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