Question Discussion & Solution

The correct answer is RAM.

• RAM is a volatile memory while ROM is a non-volatile memory.
• While RAM allows the computer to read data to run applications, ROM stores all the application which is required to start the computer initially.
• RAM can perform both read and write operations on the information stored in it.
• ROM allows the user to read the information but not write the information. It is used to store permanent information, which is non-erasable.
• MROM, PROM, EPROM, and EEPROM are different types of ROMs.

The correct answer is Joint Photographic Experts Group.

Key Points

• JPEG stands for Joint Photographic Experts Group.
  • It is a computer graphics file format.
  • JPEG is a lossy compression method widely used for digital photographs.
  • In JPEG, the image is compressed to make a smaller file.
  • Compression results in a loss of quality, however, so it is usually undetectable.
  • JPEG files are widely used on the Internet, and JPEG is a popular digital camera format, making it ideal for non-professional printing and web use.
  • JPEG format is best for web images, non-professional printing, e-mail, PowerPoint.
  • The extensions ".jpeg" and ".jpg" are used for JPEG files.

Additional Information

• PNG (Portable Network Graphics) files are a lossless picture format that was created to replace and improve upon the gif format.
• GIF files (Graphics Interchange Format) are used for web graphics and can be animated and transparent.
• BMP (Bitmap Image File) is a file format designed by Microsoft for Windows that does not compress or lose information, allowing images to have very high quality while simultaneously having very large file sizes.

The correct answer is Input, Process, Output, Storage

Key Points

• Input is the act of putting information into a computer.
• That information is now processed in the central processing unit of the computer.
• After the processing is completed, the computer generates the output of that information.
• The output data is now stored in the computer memory.

Additional Information

Some input and output devices of computer:

• Input
  • Keyboard
  • Mouse
  • Scanner 
• Output 
  • Printer 
  • Monitor
  • Plotter

The correct answer is Backspace.

Key Points

• The backspace key is used to delete a word or a line.
• Backspace is the keyboard key that originally pushed the typewriter carriage one position backwards, and in modern computer systems moves the display cursor one position backwards.
• It deletes the character at that position, and shifts back the text after that position by one position.

Additional Information

• The Alt key on a computer keyboard is used to change (alternate) the function of other pressed keys.
• Thus, the Alt key is a modifier key, used in a similar fashion to the Shift key. 
• The shift key is a modifier key on a keyboard, used to type capital letters and another alternate "upper" characters. 
• The Insert key insert (often abbreviated Ins) is a key commonly found on computer keyboards. 

The correct answer is Kernel.​Key Points

• The kernel is an essential center of a computer operating system.
• It is the core that provides basic services for all other parts of the operating system. 
• It is the main layer between the OS and hardware.
• Kernel helps in the process and memory management, file systems, device control, and networking.
• It is the first program after bootloader which is loaded and controls everything in the OS.
• It acts as an interface between application and hardware.
  It is responsible for memory management.
• There are five types of the kernel:
  • A microkernel
    • It only contains basic functionality
  • A monolithic kernel.
    • It contains many device drivers
  • Hybrid Kernel
  • Exokernel
  • Microkernel