1. What is meant by plug and play cards? Answer: It enables the user to add devices to computer. 2. What is the function of control bus? Answer: It carries signals between the units of the computer. 3. What is the function of MAR? Answer: It specifies the address of memory location from which data or instruction is to be accessed or to which the data is to be stored. 4.Name different I/O ports. Answer: Port is a socket on the back of computer. Different types of ports are serial ports, parallel ports and USB ports. 5. What is program counter? Answer: It keeps track of the memory address of the instruction that is to be executed next.
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