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

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

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Microprocessor
DS directive in 8085

None of these
Forces the assembler to reserve one byte of memory
Forces the assembler to reserve a specified number of consecutive bytes in the memory
Forces the assembler to reserve a specified number of bytes in the memory

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