Computer and Information Technology-part (1)

11. Which of the following groups consists of only output devices? [M.P.P.C.S. (PRE) 2019]

(a) Scanner, Printer, Monitor
(b) Keyboard, Printer, Monitor
(c) Mouse, Printer, Monitor
(d) Plotter, Printer, Monitor

Correct Answer: (d) Plotter, Printer, Monitor

Solution:Plotter, Printer and Monitor are output devices while Scanner, Keyboard, Mouse,Joystick, Light Pen etc. are input devices.

12. Which of the following is not an output devices? [M.P.P.C.S.(PRE) 2008]

(a) Drum pen Plotter
(b) CRT monitor
(c) Earphones
(d) Digital Camera

Correct Answer: (d) Digital Camera

Solution:

(a) Drum pen Plotter: This is an output device used for creating vector graphics on paper.
(b) CRT monitor: A CRT (Cathode Ray Tube) monitor is a common output device that displays visual information.
(c) Earphones: Earphones are output devices that allow you to hear audio signals from the computer.
(d) Digital Camera: A digital camera is an input device used to capture still images and videos and store them digitally.

13. Which is the most common 'Input device' used today? [Uttarakhand P.C.S.(pre) 2010]

(a) Motherboard
(b) Central Processing Unit
(c) Keyboard
(d) Semiconductor

Correct Answer: (c) Keyboard

Solution:The most common input device used in the computers are the keyboard and the mouse. The keyboard allows the entry of textual information while the mouse allows the selection of a point on the screen by moving a screen cursor to the point and pressing a mouse button.

14. The most common input device used today is: [Uttarakhand P.C.S. (pre) 2006]

(a) Trackball
(b) Scanner
(c) Mouse
(d) None of the above

Correct Answer: (c) Mouse

15. The body of mouse used in computers was designed about 40 years back. Then it was made of- [U.P.U.D.A./ L.D.A. (MAINS) 2010]

(a) Aluminum
(b) Plastic
(c) Steel
(d) Wood

Correct Answer: (d) Wood

Solution:The first mouse prototype was invented by Dr. Doughlas Engelbart. It was built in 1964. The original mouse was made of wood, with two metal wheels and a bottom. The mouse was first made public in 1968 at the Fall Joint Computer Conference.

16. After the double click of the mouse, the information goes to- [U.P.Lower Sub. (MAINS) 2013]

(a) Documents
(b) Video Gard
(c) C.P.U.
(d) Hard Drive

Correct Answer: (c) C.P.U.

Solution:A double- click is an act of pressing a computer mouse button twice quickly without moving the mouse. We can communicate commands to the computer (CPU) by pressing a by on to of the mouse.

17. In which port do you plug-in the cable of your keyboard? [U.P. Lower Sub. (MAINS) 2015]

(a) VGA Port
(b) Ethernet Port
(c) USB port
(d) Sanpedro Port

Correct Answer: (c) USB port

Solution:USB (Universal Serial Bus) was designed to standardize the connection of computer peripherals (including keyboards, digital cameras, printers, portable media players, disk drives etc.) to personal computers, both to communicate and to supply electric power.

18. Computer [Uttarakhand P.C.S. (pre) 2005]

1. Is a device capable of storing data.

2. Is capable of analyzing total secrecy.

3. Is capable of maintaining total secrecy.

4. Is sometimes attacked by virus.

Select the correct answer from the code given below:

Code:

(a) 1 and 2
(b) 2 and 3
(c) 1,2 and 4
(d)1 and 4

Correct Answer: (d)1 and 4

Solution:A computer is an electronic device that manipulates information or data. It has the ability to store, analyze, retrieve and process data.

While computers can analyze data and perform complex calculations, achieving "total secrecy" is practically impossible due to the limitations of cryptography and potential vulnerabilities in systems.

Sometimes our system is attacked or infected by the virus. Some common virus are - Melissa, Marburg, Terrax, Trojan etc.

19. A network of networks is simply called- [Uttarakhand P.C.S. (PRE) 2010]

(a) Exranet
(b) Intranet
(c) Webnet
(d) Internet

Correct Answer: (d) Internet

Solution:Generally, Internet is called 'a network of networks because a is a global system of the network of inter-connected computers. Here millions of private, public, educational, commercial and government networks are connected with Internet Protocol Suite, TCP/IP

20. What is the Internet? [M.P.P.C.S.(PRE) 1996]

(a) A net for catching fish in the ocean.
(b) Name of International Basketball Championship.
(c) A system for tracking movement of railway wagons on Railway lines.
(d) An international computer-based information network.

Correct Answer: (d) An international computer-based information network.

Computer and Information Technology-part (1)