Computer and Information Technology (Physics) Part-I

Total Questions: 50

11. Which of the following is not an output device? [Jharkhand P.C.S. (Pre) 2016]

Correct Answer: (b) Touch screen
Solution:

Among the given options Monitor, Printer and Plotter are explicitly output devices while Touch screen is the assembly of both an input (touch panel) and output (display) device. In a Touch screen the touch panel normally layered on the top of an electronic visual display of an information processing system.

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

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.

13. Which of the following is not an output device? [M.P.P.C.S. (Pre) 2008]

Correct Answer: (d) Digital Camera
Solution:

According to the options given in the question, only digital camera is an input device while others are the output devices.

14. Which is the most common 'input device' used today? [Uttarakhand P.C.S. (Pre) 2010]

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.

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

Correct Answer: (c) Mouse
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.

16. 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]

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.

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

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 button on top of the mouse.

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

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.

19. Computer [Uttarakhand P.C.S. (Pre) 2005]

1. Is a device capable of storing data.

2. Is capable of analyzing data.

3. Is capable of maintaining total secrecy.

4. Is sometimes attacked by virus.

Select the correct answer from the code given below:

Code:

Correct Answer: (d) All the four
Solution:

A computer is an electronic device that manipulates information or data. It has the ability to store, analyze, retrieve and process data. The work or data which we stored in it, is totally secure and is done by using passwords.

Sometimes our system is attacked or infected by the virus. Some common virus are - Melissa, Marburg, Terrax, 1069, Trojan etc.

20. Due to the improper/indiscriminate disposal of old and used computers or their parts, which of the following are released into the environment as e-waste? [I.A.S. (Pre) 2013]

1. Beryllium

2. Cadmium

3. Chromium

4. Heptachlor

5. Mercury

6. Lead

7. Plutonium

Select the correct answer using the codes given below

Correct Answer: (b) 1, 2, 3, 5 and 6
Solution:

Heptachlor is not an e-waste. In fact, it is an organochlorine compound which is used as an insecticide usually sold as a white or tan powder. Heptachlor is one of the cyclodiene insecticides. Plutonium is a radioactive metal and hence not used in computers. So option (b) is correct.