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Computer Basics Interview Questions and Answers

Ques 1. What is Accelerator key?


For Windows, a keyboard accelerator is represented by an underlined letter on a button, menu or other label.

On recent versions of Windows, they are hidden until you press the Alt key. Then you can hit that letter to select the menu, button or other input control.

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Ques 2. What is Active window?
Ans. The current window that is being used. The window you are working currently.
Example: If you are working on Paint so the active window is paint, if you working on Notepad so that time Notepad is Active window.
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Ques 3. What is Asynchronous SRAM?
  • Static random-access memory (SRAM) is a type of semiconductor memory that uses bistable latching circuitry to store each bit. The term static differentiates it from dynamic RAM (DRAM) which must be periodically refreshed. SRAM exhibits data remanence,[1] but is still volatile in the conventional sense that data is eventually lost when the memory is not powered.
  • Asynchronous SRAM are available from 4 Kb to 64 Mb. The fast access time of SRAM makes asynchronous SRAM appropriate as main memory for small cache-less embedded processors used in everything from industrial electronics and measurement systems to hard disks and networking equipment, among many other applications. They are used in various applications like switches and routers, IP-Phones, IC-Testers, DSLAM Cards, to Automotive Electronics.
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Ques 4. What is BIOS (Basic Input and Output Software)?
Ans. BIOS stands for Basic Input and Output Software. The BIOS is software that controls the most fundamental operations of a computer and a BIOS is necessary in order to start a computer. Without a BIOS, a computer would not know how to communicate with its hard disk and other devices. The BIOS is stored on a ROM (Read-Only Memory) computer chip inside the computer. Many computers in the past few years use "Flash EPROM" chips, which means the BIOS chip can be reprogrammed with an updated BIOS. A BIOS may need to be updated to fix bugs, such as the year 2000 bug, or an update may be necessary in order to support new hardware protocols.
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Ques 5. What is Bit?
A bit (short for binary digit) is the smallest unit of data in a computer. A bit has a single binary value, either 0 or 1. Although computers usually provide instructions that can test and manipulate bits, they generally are designed to store data and execute instructions in bit multiples called bytes. In most computer systems, there are eight bits in a byte. The value of a bit is usually stored as either above or below a designated level of electrical charge in a single capacitor within a memory device.

Half a byte (four bits) is called a nibble. In some systems, the term octet is used for an eight-bit unit instead of byte. In many systems, four eight-bit bytes or octets form a 32-bit word. In such systems, instruction lengths are sometimes expressed as full-word (32 bits in length) or half-word (16 bits in length).
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