[amp_mcq option1=”allows the programmer to write base registers and displacements explicitly in the source program.” option2=”is used to remember which of the general-purpose registers are currently available as base registers, and what base addresses they contain.” option3=”allows multiple programs to reside in separate areas of core at the same time.” option4=”is a term that refers to the control programs of an operating system. E. None of the above” correct=”option2″]
The correct answer is B.
A base register table is a data structure used to remember which of the general-purpose registers are currently available as base registers, and what base addresses they contain. This information is used by the processor to translate virtual addresses to physical addresses.
Option A is incorrect because the base register table does not allow the programmer to write base registers and displacements explicitly in the source program. The programmer can specify the base register and displacement in the source program, but the base register table is used by the processor to translate these values to physical addresses.
Option C is incorrect because the base register table does not allow multiple programs to reside in separate areas of core at the same time. The base register table is used to translate virtual addresses to physical addresses, but it does not control which programs are loaded into memory.
Option D is incorrect because the base register table is not a term that refers to the control programs of an operating system. The control programs of an operating system are typically called the kernel.
Option E is incorrect because the base register table is a real thing that is used by processors to translate virtual addresses to physical addresses.