Which device is used to move the cursor on the screen?
Answer : The mouse
The mouse lets you point and click.
Questions and answers: Computing & Technology
Revise Computing & Technology: here is a selection of questions of every level, with the answer and an explanation. To test yourself without seeing the answers, play the quizzes.
Play the Computing & Technology quizzesVery easy
Which company created the iPhone?
Answer : Apple
The iPhone was launched by Apple.
Which of these programs is a web browser?
Answer : Firefox
Firefox is used to browse the Internet.
Where is the @ symbol used?
Answer : Email addresses
It separates the username from the domain.
What does USB stand for in “USB stick”?
Answer : Universal Serial Bus
USB stands for Universal Serial Bus.
Google is mainly…
Answer : a search engine
Google is best known for its search engine.
Which of these is a social network?
Answer : Instagram
Instagram is used to share photos and videos.
Which of these is an operating system?
Answer : Windows
Windows is an operating system made by Microsoft.
Easy
Who founded Microsoft with Paul Allen?
Answer : Bill Gates
Microsoft was founded in 1975.
Which programming language is named after a snake?
Answer : Python
Python evokes a snake, as well as Monty Python.
What is the HTML language used for?
Answer : Structuring web pages
HTML describes the structure of a web page.
What does CPU stand for?
Answer : Central Processing Unit
CPU = Central Processing Unit.
How many bits are in a byte?
Answer : 8
A byte contains 8 bits.
Which company was co-founded by Steve Jobs, Steve Wozniak and Ronald Wayne?
Answer : Apple
Apple was founded in 1976.
Which company acquired and then developed the Android system?
Answer : Google
Google bought Android Inc. in 2005.
What is a URL?
Answer : The address of a web page
A URL locates a resource on the web.
Medium
Who invented the World Wide Web?
Answer : Tim Berners-Lee
Tim Berners-Lee devised it at CERN in the late 1980s.
Who created the Linux kernel?
Answer : Linus Torvalds
Linus Torvalds started it in 1991.
What is the SQL language used for?
Answer : Querying databases
SQL stands for Structured Query Language.
What is the decimal value of the binary number 1010?
Answer : 10
8 + 2 = 10.
What does the S in HTTPS stand for?
Answer : Secure
HTTPS is the secure version of HTTP.
Who founded Google?
Answer : Larry Page and Sergey Brin
They founded Google in 1998.
In which year was the first iPhone unveiled?
Answer : 2007
Steve Jobs unveiled it in January 2007.
Which language is the main one for making web pages interactive in the browser?
Answer : JavaScript
JavaScript runs in the browser.
Hard
Who is often considered the first computer programmer in history?
Answer : Ada Lovelace
Ada Lovelace wrote an algorithm for Babbage's Analytical Engine.
Which network is the Internet descended from?
Answer : ARPANET
ARPANET appeared in the late 1960s.
In which laboratory was the C language developed?
Answer : Bell Labs
Dennis Ritchie created it at Bell Labs.
How many bits does an IPv4 address use?
Answer : 32
An IPv4 address is 32 bits long.
Who proposed the “imitation game”, known as the Turing test?
Answer : Alan Turing
Alan Turing described it in 1950.
What is the default port of the HTTP protocol?
Answer : 80
HTTP uses port 80, HTTPS uses 443.
In which year did the computer Deep Blue beat Garry Kasparov?
Answer : 1997
That chess match took place in 1997.
Which Intel processor, released in 1971, is regarded as the first commercial microprocessor?
Answer : Intel 4004
The Intel 4004 dates from 1971.
Expert
Who invented the RSA encryption algorithm?
Answer : Rivest, Shamir and Adleman
The letters R, S and A come from their surnames.
What is the time complexity of a binary search in a sorted array of n elements?
Answer : O(log n)
Each step halves the search space.
Who is the author of “The Art of Computer Programming”?
Answer : Donald Knuth
Donald Knuth.
Who created the Ruby language?
Answer : Yukihiro Matsumoto
Yukihiro “Matz” Matsumoto released it in 1995.
At which company was Unix born in the late 1960s?
Answer : AT&T (Bell Labs)
Ken Thompson and Dennis Ritchie created it at Bell Labs.
What does Dijkstra's algorithm compute?
Answer : Shortest paths in a graph
It finds minimal-cost paths from a source vertex.
Who proved that the halting problem is undecidable?
Answer : Alan Turing
Turing showed it in 1936.
What is AES?
Answer : A symmetric encryption algorithm
AES stands for Advanced Encryption Standard.
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