Operating System (OS)
The disadvantages of "Compile and Go" loading scheme is (are):

it is necessary to retranslate the user's program deck every time it is run.
a portion of memory is wasted because the core occupied by the assembler is unavailable to the object program.
All of these
it is very difficult to handle multiple segments, especially if the source programs are in different languages, and to produce orderly modular programs.
None of these

ANSWER DOWNLOAD EXAMIANS APP

Operating System (OS)
Trojan-Horse programs

None of these
are legitimate programs that allow unauthorized access
are hidden programs that do not show up on the system
usually are immediately discovered
do not usually work

ANSWER DOWNLOAD EXAMIANS APP

Operating System (OS)
A critical region is

a program segment where shared resources are accessed
a program segment that often causes unexpected system crashes
none is the above
a program segment that has not been proved bug-free
one which is enclosed by a pair of P and V operations on semaphores

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Operating System (OS)