Question Discussion & Solution

The correct answer is Text file.

Key Points

• A text file (sometimes spelled textfile) is a kind of computer file that is structured as a sequence of lines of electronic text.
• A text file exists as data within a computer file system. 
• "Text file" refers to a type of container, while plain text refers to a type of content.

Additional Information

Extension of some other important files:

• Excel file - Xls
• Word file - doc
• Powerpoint file - ppt 
• Open document - Odt

The correct answer is Ctrl + Shift + <

Key Points

• Ctrl + Shift + < 
  • It is used to decrease the font to the next smaller point size available in the Font size list box in Microsoft Word.

Additional Information

• Ctrl + Shift + >
  • It is used to increase the font to the next smaller point size available in the Font size list box in Microsoft Word.
• Ctrl + Shift + +
  • It is used to apply superscript.
• Ctrl + Shift + F
  • It is used to open the Font window to change the font.

Important Points

• You can access the Fonts dialog box or use the tools in the Home tab in MS Word.
• The list contains font size in points 8, 9, 10, 11, 12, 14, 16, 18, 20, 22, 24, 26, 28, 36, 48 and 72.
• Word supports font size b​etween 1 and 1638. 

The correct answer is Kernel.

Key Points

• The first program loaded on start-up and manages computer system resources is Kernel.
• A kernel is the central part of an operating system.
• It manages the operations of the computer and the hardware, most notably memory and CPU time.
• There are five types of kernels:
  • A microkernel, which only contains basic functionality
  • A monolithic kernel, which contains many device drivers
  • Hybrid Kernel
  • Exokernel
  • Microkernel

Additional Information

• Resources under the Operating System control:
  • The processor.
  • Main memory.
  • Input/Output Device.
  • Secondary storage devices.
  • Communication devices and ports. 

The correct answer is Network of networks.

Key Points

• The Internet is a global wide area network that connects computer systems across the world.
• It includes several high-bandwidth data lines that comprise the Internet "backbone".
• These lines are connected to major Internet hubs that distribute data to other locations, such as web servers and ISPs. 
• Therefore, it is called the 'Network of networks'.

Additional Information

• Vint Cerf is widely known as the father of the Internet.
• Vint is the co-designer with Robert Kahn of TCP/IP protocols and basic architecture of the Internet. 
• Bob Kahn and Vint Cerf were the two who first invented the internet.
• The first web page went live on August 6, 1991.

The correct answer is VDU.

Key Points

• Visual Display Unit (VDU): 
  • Visual Display Unit is an Output Device that displays all work is done and images on its screen.
  • It is also called a Monitor. After processing the input, the result is shown on the Monitor.
  • The three most common specifications about the quality of monitors are Dot Pitch, Resolution, and Refresh Rate.
  • There are many types of monitor technologies are available like CRT (Cathode Ray Tube) monitors, LCD (Liquid Crystal Display) monitors, LED (Light Emitting Diode), OLED (Organic Light Emitting Diode), etc.

Important Points

• Keyboard: The keyboard is one of the main Input Devices used in a computer. It is used to enter text and numeric data in a computer system. 
• Mouse: It is also called a Pointing Device which is used to point to the things on the monitor screen. It is an Input Device that was invented by Douglas Engelbert.
• Light Pen: A light pen is an Input Device, similar to a mouse. It is used to directly write and draw any figure on the computer screen.

Additional Information