A user program executes in a __________ , in which certain areas of memory are protected from the user's use, and in which certain instructions may not be executed.Select one:A.batch modeB.kernel modeC.user modeD.task modeClear my choice

When a user process invokes a system call, the operating system process that handles the call operates in the following mode:A.ThreadB.UserC.PrivilegeD.No privileges

Which of the following operations need to be privileged:  (Please select ALL correct answers)Group of answer choicesSet value of timerRead Clockclear memoryIssue a trap instructionturn off interruptsmodify entries in device-status tableaccess I/O device (directly)Switch from user to kernel mode

Some computer systems support dual mode operation- the user mode and the supervisor or monitor mode. These refer to the modesa.By which user programs handle their datab.By which the operating system executes user programsc.In which the processor and the associated hardware operated.Of memory access

The main memory accommodates ____________a.Central processing unitb.Operating systemc.User processesd.All of the mentioned

.Identify any three instructions that should be highly privileged(prioritize) by OS from the given options.a. Set value of timer.b. Read the clock.c. Clear memory.d. Issue a trap instruction.e. Turn off interrupts.f. Modify entries in device-status table.g. Switch from user to kernel mode