Operating System (OS)
In which addressing mode the contents of a register specified in the instruction are first decremented, and then these contents are used as the effective address of the operands?

auto decrement
index addressing
None of these
indirect addressing
auto increment

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Operating System (OS)
Assembler language

is usually the primary user interface
is a mnemonic form of machine language
requires fixed-format commands
is quite different from the SCL interpreter
None of these

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