IT &computer MCQ section 2 MCQ Questions & Answers Detailed Explanation

Answer: (d)

Garbage in, garbage out (GIGO), in the context of information technology, is a slang expression that means regardless of how accurate a program’s logic is, the results will be incorrect if the input is invalid.

A program gives inaccurate results due to inaccurate data provided because a computer will always attempt to process data given to it. So GIGO is related to the accuracy of output which, in turn, is dependent on the accuracy of inputs.

Answer: (c)

The World Wide Web (abbreviated as WWW or W3, commonly known as the Web), is a system of interlinked hypertext documents accessed via the Internet.

Using concepts from his earlier hypertext systems like ENQUIRE, British engineer, computer scientist and at that time employee of CERN, Sir Tim Berners-Lee, now Director of the World Wide Web Consortium (W3C), wrote a proposal in March 1989 for what would eventually become the World Wide Web.

Answer: (c)

A modem takes the digital signal from the computer and converts it to "analog". It does this by both creating an analog sine wave and then "MODulating" it. Since the result still represents digital data, it could also be called a digital signal instead of analog.

Answer: (b)

Clickjacking is a malicious technique of tricking a Web user into clicking on something different to what the user perceives they are clicking on, thus potentially revealing confidential information or taking control of their computer while clicking on seemingly innocuous web pages. It is a browser security issue that is vulnerable across a variety of browsers and platforms.

A clickjacking takes the form of embedded code or a script that can execute without the user’s knowledge, such as clicking on a button that appears to perform another function. The term “clickjacking” was coined by Jeremiah Grossman and Robert Hansen in 2008.

Answer: (b)

Electronic mail, most commonly referred to as email, is a method of exchanging digital messages from an author to one or more recipients.

Normally, there could be three types of recipients:

1. the target recipient;
2. a carbon copy (Cc) recipients; and
3. blind carbon copy (Bcc) recipients.

Answer: (c)

A worm is a process that uses the spawn mechanism to clobber system performance.

The worm spawns copies of itself, using up system resources and perhaps locking out the system used by all other processes. On computer networks, worms are particularly potent, since they may reproduce themselves among systems and thus shut down the entire network.

Such an event occurred in 1988 to UNIX systems on the internet.