Operating systems

can you help me with q1,2,3,4

e) 1) When a thread needs t a wait for an event it will? A] B lock [B] Execute (C) Terminate Pupdate (2) Multiporgraming? A Shortiterm B) long-term [c] medium-term (2) other (3) userlevel coutext contains basis elements of? [A] User's program [B) Systen [E] Application (0) none (4) I/0 function allows to exchange data diredy= between an? (A) process states 13 Registers C. I/o madule procenor (D) I/o devices