Which of the following actions is/are typically not performed by the operating system when switching context from process $$A$$ to process $$B$$ ?

A multi-user, multi-processing operating system cannot be implemented on hardware that does not support:

System calls are usually invoked by using:

Given the programming constructs:

(i) assignment
(ii) for loops where the loop parameter cannot be changed within the loop
(iii) if-then-else
(iv) forward go to
(v) arbitrary go to
(vi) non-recursive procedure call
(vii) recursive procedure/function call
(viii) repeat loop,

which constructs will you not include in a programming language such that it should be possible to program the terminates (i.e., halting) function in the same programming language.