Which of these is a search engine?
Answer: B
Google is a search engine.
It crawls the web, indexes what it finds and ranks results, originally by the PageRank algorithm which treats a link as a vote. FTP is a file transfer protocol, Archie an early FTP index and ARPANET the internet's predecessor.
Please log in or register to report this question.
Larger buildings may be supplied with a medium voltage electricity supply, and will required a substation or mini-sub. What is the main item of equipment contained in these?
Answer: A
The main item in a substation is a transformer.
It steps the medium-voltage supply, typically 11 kV, down to the 400/230 V used in the building. Transformers work only on alternating current, which is why AC won the battle of the systems.
Please log in or register to report this question.
In what year did the Symantec Corporation first release Norton Antivirus?
Answer: A
Symantec first released Norton AntiVirus in 1990.
It came from Symantec's acquisition of Peter Norton Computing that year, and became one of the best-known consumer security products of the following decade.
Please log in or register to report this question.
Which company created the most used networking software in the 1980's
Answer: D
Novell created the most widely used networking software of the 1980s.
NetWare let PCs share files and printers over a local network, and dominated the market until Microsoft built networking into Windows NT in the 1990s.
Please log in or register to report this question.
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.
Please log in or register to report this question.
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.
Please log in or register to report this question.
'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.
Please log in or register to report this question.
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.
Please log in or register to report this question.
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.
Please log in or register to report this question.
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.
Please log in or register to report this question.
