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Microprocessor

Microprocessor
Pick up the programmable interrupt controller from the following

 8259
 8257
 8275
 8279

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Microprocessor
Consider the following statements: Arithmetic Logic Unit (ALU) 1.Performs arithmetic operations 2.Performs comparisons. 3.Communicates with I/O devices 4.Keeps watch on the system Which of these statements are correct?

 3 and 4 only
 1, 2, 3 and 4
 1, 2 and 3
 1 and 2 only

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Microprocessor
In a microcomputer , the address of memory locations are binary numbers that identify each memory circuit where a byte is stored. If a microcomputer uses 20-bit address, then numbers of different memory locations are

 220 - 1
 220
 20
 220-1

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Microprocessor
Using one 8259 IC is equivalent to providing …………. INTR pins on 8085

 16
 8
 18
 12

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Microprocessor
A microprocessor with a 12-bit address bus will be able to access

 8 K bytes
 4 K bytes
 10 K bytes
 1 K bytes

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Microprocessor
Which instruction is required to rotate the content of accumulator one bit right along with carry?

 RLC
 RAR
 RRC
 RAL

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