80. The essential difference between an operating system like Linux and one like Windows is that

Windows can run with an Intel processor, whereas Linux cannot
Linux is a proprietary whereas Windows is not
There are multiple versions of Linux, but only one version of Windows
Any programmer can modify Linux code which is not permitted with Windows
✅ The correct answer is D.

86. The advantage(s) of incorporating the macro processor into pass 1 is(are):

many functions do not have to be implemented twice.
Functions are combined and it is not necessary to create intermediate files as output from the macros processor and input to the assembler.
more flexibility is available to the programmer in that he may use all the features of the assembler in conjunction with macros.
all of the above
✅ The correct answer is D.

50. Paging

is a method of memory allocation by which the program is subdivided into equal portions, or pages and core is subdivided into equal portions or blocks.
consists of those addresses that may be generated by a processor during execution of a computation.
is a method of allocating processor time.
allows multiple programs to reside in separate areas of core at the time.
✅ The correct answer is A.