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Microprocessor

Microprocessor
Total number of instructions in 8085 microprocessor assembly language is

 244
 247
 245
 246

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Microprocessor
The operating modes of 8255 A are called

Mode 0, mode 1 and mode 2
Mode 0 and mode 2
Mode 0, mode 2 and mode 3
Mode 0 and mode 1

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

 RRC
 RAL
 RAR
 RLC

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Microprocessor
A microprocessor differentiates between op code, data/address at any time by

 the sequence in which memory contents are fetched by it
 the program counter
 its internal registers
 the stack pointer

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Microprocessor
Which one of the following ICs is used to interface keyboard and display?

 8251
 8259
 8253
 8279

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Microprocessor
Each instruction in an assembly language program has the following fields 1. Label field 2. Mnemonic field 3. Operand field 4. Comment field What are the correct sequence of these fields?

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

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