Class 9
Unit - 3 Q1. What are the three main components of a CPU? Ans. Three main components of a CPU are: a. Arithmetic and Logical Unit ( ALU) b. Control Unit (CU) c. Memory Unit (MU) 2. Define Register. Ans. A register is a very small data holding place in a computer processor. It holds an instruction, storage address or data. 3. Name two types of primary memory. Ans. Two types of primary memory are: RAM (Random Access Memory) and ROM (Read Only Memory). 4. Which unit is used to measure the speed of a CPU? Ans. CPU speed is measured in Megahertz(MHZ). 5. What is DOS? Ans. Disk Operating System (DOS) is a type of system software that runs from a hard disk drive. It is a command line operating system. 6.Define Desktop. Ans. The desktop is the primary user interface of a computer. It includes the desktop background (or wallpaper) and icons of files and folders you may have saved to the desktop. 7. What is Social Media? Ans....