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Microprocessor

Microprocessor
The number of interrupt lines in 8085 is

5
4
3
2

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Microprocessor
HLT opcode means

  end of program.
  store result in memory.
  load data to accumulator.
  load accumulator with contents of register.

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Microprocessor
Let the content of accumulator and register B be 0000 0100 and 0100 0000 respectively before execution of instruction SUB B. The content of accumulator after the execution of this instruction will be

 010001000
 11000100
 00000100
 01000000

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Microprocessor
What are the sets of commands in a program which are not translated into machine instructions during assembly process, called?

 Identifiers
 Operands
 Mnemonics
 Directives

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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

 20
 220-1
 220
 220 - 1

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Microprocessor
Which of the following is a valid integer constant?

127
127
127
125 + 3

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