Microprocessor
Which one of the following is not correct?

 An instruction is a set of bits that defines a computer operation
 Bootstrap is a technique or device for loading first instruction
 Bus is a group of wires
 An interrupt signal is required at the start of every program

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Microprocessor
The output data lines of microprocessor and memories are usually tristated because

 The data line can be multiplexed for both input and output
 More than one device can transmit over the data bus at the same time
 More than one device can transmit information over the data bus by enabling only one device at a time
 It increases the speed of data transfer over the data bus

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Microprocessor
A microprocessor is ALU

 register unit and I/O device on a single chip.
 and memory on a single chip.
 and control unit on a single chip.
 register unit and control unit on a single chip.

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Microprocessor
Program counter in a digital computer

 Counts the number of times the loops are executed.
 Counts the numbers of programs run in the machine.
 Points the memory address of the next instruction to be fetched.
 Counts the number of times a subroutine is called.

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