Microprocessor
A bus connected between the CPU and main memory that permits transfer of information between main memory and the CPU is known as

 DMA bus
 Memory bus
 Control bus
 Address bus

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Microprocessor
In a vector interrupt

 none.
 the interrupting source supplies the branch information to the processor through an interrupt vector.
 the branch address is assigned to a fixed location in memory.
 the branch address is obtained from a register in the processor.

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