Computer Question Explanations

Question 1.

Explanations

Ans.(e)
Sol. Tim Berners-Lee- Inventor of the World Wide Web.  Berners-Lee is the director of the World Wide Web Consortium (W3C), which oversees the continued development of the Web.
Raymond Tomilson-Sent the first e-mail (to himself)
Douglas Englebart- Father of computer mouse
Charles Babbage- Father of computers, inventor of analytical engine and difference engine
Vint Cerf- Father of the Internet. Cerf is the co-designer of the TCP/IP protocols and the architecture of the Internet.

Question 2.

Explanations

Ans.(a)
Sol. Personal Digital Assistant (PDA) is a device with functioning of a mobile information manager.

Question 3.

Explanations

Ans.(d)
Sol. Ctrl+A- to select all
Ctrl+C- to copy
Ctrl+W- to close currently focused tab/window
Ctrl+Y- used to reverse last undo
Ctrl+Z- to reverse last action i.e. to perform undo operation

Question 4.

Explanations

Ans.(c)
Sol. IEEE 802 is a family of IEEE standards dealing with local area networks and metropolitan area networks. 802.3 is for Ethernet.

Question 5.

Explanations

Ans.(e)
Sol. There are 7 layers in the OSI Model and OSI stands for Open System Interconnection.
Following are the protocol data units of OSI Layers:
Layer 1- bit
Layer 2 – frame,
Layer 3 – packet
Layer 4 – segment
Layer 5 and above- data.

Question 6.

Explanations

Ans. (e)
Sol. Electronic commerce, commonly written as e-commerce or e-commerce, is the trading or facilitation of trading in products or services using computer networks, such as the Internet or online social networks.

Question 7.

Explanations

Ans. (d)
Sol. Modem is a telecommunication device.

Question 8.

Explanations

Ans. (a)
Sol. Single-user mode allows only one connection to a database at a given moment in time.

Question 9.

Explanations

Ans. (c)
Sol. A nibble =4 bits.

Question 10.

Explanations

Ans.(b)
Sol. A folder is a virtual location where programs, files, and other folders can be located.

Question 11.

Explanations

Ans. (a)
Sol. cascade and tile are two ways to arrange multiple windows on the desktop.

Question 12.

Explanations

Ans.(a)
Sol. Web hosting is a service that allows organisations to make their own website accessible through WWW. This service allows you to share the data on the Web or the Internet by storing your Web page on the Internet.

Question 13.

Explanations

Ans.(a)
Sol. In HTML, you can create a horizontal line on a Web page by using the <hr>tag. The purpose of the <hr> tag is to separate paragraphs or sections on a Web page.

Question 14.

Explanations

Ans.(b)
Sol. The GIF image format was developed for CompuServe (an online information service). Converting an image to a GIF image format is safe as no data is lost at the time of conversion.

Question 15.

Explanations

Ans.(a)

Sol. PARAM is a series of supercomputers designed and assembled by the Centre for Development of Advanced Computing (C-DAC) in Pune, India. The latest machine in the series is the PARAM Kanchenjunga.