Operating System (OS)
A bar that inform you the available options in your computer, opened applications, background running applications and can be used to switch between applications quickly is

Task bar
Status bar
Menu bar
Tool bar

ANSWER DOWNLOAD EXAMIANS APP

Operating System (OS)
Thrashing can be avoided if

the speed of CPU is increased
the pages, belonging to the working set of the programs, are in main memory
None of these
the speed of I/O processor is increased
All of these

ANSWER DOWNLOAD EXAMIANS APP