Operating System (OS)
Supervisor state is

None of these
never used
only allowed to the operating system
required to perform any I/O
entered by programs when they enter the processor

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Operating System (OS)
Addressing modes

are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing.
performs indicated operations on two fast registers of the machine and leave the result in one of the registers.
defines the fundamental method of determining effective operand addresses
None of these
All of these

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Operating System (OS)
Which of the following statements is not true about the FORTRAN language?

FORTRAN is a high level language
FORTRAN is extensively used to write programs for performing scientific computations
All of these
A FORTRAN program, written for the IBM-PC, is totally different from a FORTRAN program written for execution on the SUN machine
None of these

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