Computer Science/IT MCQs
Topic Notes: Computer Science/IT
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
1
Which institution is credited as the birthplace of the World Wide Web, where Tim Berners-Lee developed the foundational technologies?
Answer:
CERN (European Organization for Nuclear Research)
The World Wide Web was conceived and developed by Tim Berners-Lee in 1989 while he was working at CERN (European Organization for Nuclear Research). Located near Geneva, Switzerland, CERN provided the environment where Berners-Lee envisioned and implemented the core protocols and languages (HTTP, HTML, URI) that enabled the creation of a global information-sharing system, initially to facilitate communication among physicists. The first website went live from CERN in 1991.
2
When constructing a search query, which Boolean operator should be used to retrieve results that contain *all* of the specified keywords?
Answer:
AND
The 'AND' Boolean operator is used to narrow down search results by requiring that every term connected by 'AND' must be present in each retrieved document or webpage. For example, a search for 'cats AND dogs' would only return results that contain both the word 'cats' and the word 'dogs'. This is in contrast to 'OR', which broadens results by finding documents containing at least one of the terms, and 'NOT', which excludes results containing a specific term. 'XOR' (exclusive or) is less commonly used in general search engines but would return results containing one term but not both.
3
Which early computer network, developed by the U.S. Department of Defense, is credited with laying the foundational technical groundwork for the modern Internet?
Answer:
ARPANET (Advanced Research Projects Agency Network)
ARPANET (Advanced Research Projects Agency Network) was a revolutionary packet-switching network initiated by the U.S. Department of Defense's Advanced Research Projects Agency. It was the first network to establish and utilize the TCP/IP protocol suite, which became the fundamental communication language of the Internet. While networks like NSFNET later expanded access and laid the commercial foundation, ARPANET served as the original technical blueprint and experimental platform from which the global Internet evolved. BITNET and CYCLADES were other important, but distinct, early networks.
4
Which individual is widely recognized for co-designing the foundational communication protocols (TCP/IP) that paved the way for the modern internet?
Answer:
Vinton Cerf, a pioneering figure in the development of the internet architecture.
Vinton 'Vint' Cerf, alongside Robert Kahn, is widely acknowledged as one of the 'fathers of the Internet' for their pivotal work in the 1970s. They co-designed the Transmission Control Protocol (TCP) and the Internet Protocol (IP), collectively known as TCP/IP. These protocols are fundamental communication standards that define how data is packaged, addressed, sent, routed, and received across different networks, forming the backbone of the global internet we use today. The other options refer to significant but unrelated contributions to computer science and technology: Charles Babbage (Option A) is known for early mechanical computers; Dennis Ritchie (Option C) for the C programming language and Unix; and Martin Cooper (Option D) for the mobile phone.
5
Which individual is credited with inventing the World Wide Web, developing its foundational technologies like HTML and HTTP?
Answer:
Tim Berners-Lee
Sir Tim Berners-Lee, a British computer scientist, is widely recognized for inventing the World Wide Web in 1989 while he was working at CERN (the European Organization for Nuclear Research). He not only conceived the idea but also implemented the first successful communication between a Hypertext Transfer Protocol (HTTP) client and server via the Internet. Crucially, he developed the core technologies that underpin the web: HTML (Hypertext Markup Language) for structuring web content, URL (Uniform Resource Locator) for addressing web resources, and HTTP for transmitting data. While others like Vinton Cerf (co-inventor of the TCP/IP protocol, foundational to the internet) made significant contributions to computing, Berners-Lee's specific innovation was the World Wide Web itself.
6
What does 'URL' stand for?
Answer:
Uniform Resource Locator
A URL is a reference to a web resource that specifies its location on a computer network and a mechanism for retrieving it.
7
Which of the following organizational tools is commonly used within web browsers to categorize and manage saved website links?
Answer:
Folders
In most web browsers (such as Chrome, Firefox, Edge, Safari), the primary method for organizing saved website links (bookmarks or favorites) is through the use of 'Folders'. Users can create multiple folders and subfolders to categorize their bookmarks by topic, project, or any other preferred scheme, making it much easier to locate specific saved sites among many. While 'Menus' might display bookmarks, they are a display mechanism, not an organizational tool for grouping. 'Structures' and 'Containers' are general terms not specifically used in this context within web browsers.
8
What does URL stand for?
Answer:
Uniform Resource Locator
A URL identifies a resource's location on the internet, commonly known as a web address.
9
Which software application holds the distinction of being the very first web browser ever developed?
Answer:
WorldWideWeb
The inaugural web browser, developed in 1990 by Tim Berners-Lee, who is also credited with inventing the World Wide Web itself, was named 'WorldWideWeb'. It was a highly innovative application that not only allowed users to view web pages but also to edit them directly. To prevent confusion with the emergent internet information space it was designed to access, the browser was later renamed 'Nexus'.
10
What does Wi-Fi stand for?
Answer:
None of the above
Wi-Fi is a trademarked name for the IEEE 802.11 set of wireless networking standards. It does not stand for anything.