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515. A page fault occurs when

the Deadlock happens
the Segmentation starts
the page is found in the memory
the page is not found in the memory
✅ The correct answer is option D.

482. The disadvantages of “Compile and Go” loading scheme is (are):

a portion of memory is wasted because the core occupied by the assembler is unavailable to the object program.
it is necessary to retranslate the user’s program deck every time it is run.
it is very difficult to handle multiple segments, especially if the source programs are in different languages, and to produce orderly modular programs.
all of the above
✅ The correct answer is option D.

491. In memory systems, boundary registers

are used for temporary program variable storage
are only necessary with fixed partitions
track page boundaries
track the beginning and ending of programs
✅ The correct answer is option D.

494. Assembler language

is usually the primary user interface
requires fixed-format commands
is a mnemonic form of machine language
is quite different from the SCL interpreter
✅ The correct answer is option C.

500. Boot startup process

Loads system files to RAM
Checks the computer connections
Clean up the computer memory
Prepare the computer ready
✅ The correct answer is option A.
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