UGC-NET/GATE Multiple Choice Questions for Operating System.
What is role of base/bound registers?
They give starting address to a program
Program's addresses are neatly confined to space between the base and the bound registers
They provide encrypted environment
This technique doesn't protects a program's address from modification by another user
..... is the time required by a sector to reach below read/write head.
None of the above
Commonly used secondary memory is
Which option will be used with ps command to slow the entire command line of the process being run?
Consider the following C code for process P1 and P2. a=4, b=0, c=0 (initialization) P1 P2 if (a < 0) b = 10; c = b-a; a =-3; else c = b+a; If the processes P1 and P2 executes concurrently (shared variables a, b and c), which of the following cannot be the value of 'c' after both processes complete?
A bit that selects the mode of the operating system is called
Division by zero error are caused by
user defined code
Which of the following is not a characteristic of a daisy chaining priority control scheme?
priority is programmable
it is relatively easy to add more devices to the chain
the failure of one device may affect other devices on the chain
the number of control lines is independent of the number of devices on the chain
You are installing Windows 2000 Server on a multiprocessor computer. The manufacturer has provided a customized HAL to use with the computer. The HAL is on the floppy disk. You want to install the customized HAL design for the computer. What should you do?
During the text mode portion of the Windows 2000 setup install the customized HAL
After text mode portion of Windows 2000 setup is complete use the recovery console to copy the customized HAL to the system32 folder on the boot partition
After the text mode portion your windows 2000 setup is complete use the emergency repair process to replace the existing HAL with the customized HAL and then continue the windows 2000 setup
After the Windows 2000 setup is complete use the device manager to scan for Hardware changes when prompted install the customized HAL
Normally user programs are prevented from handling I/O directly by I/O instructions in them. For CPUs having explicit I/O instructions, such I/O protection is ensured by having the I/O instructions privileged. In a CPU with memory mapped I/O, there is no explicit I/O instruction. Which one of the following is true for a CPU with memory mapped I/O?
I/O protection is ensured by operating system routine(s)
I/O protection is ensured by a hardware trap
I/O protection is ensured during system configuration
I/O protection is not possible
The squared coefficient of variance, traditionally called
A partitioned data set is most used for
a program or source library
storing program data
storing backup information
storing ISAM files
CineBlitz multimedia server supports
real time clients
non-real time clients
both real time & non-real time clients
none of the mentioned
Which of the following could be a valid DOS file specification?
HANDLE file in operating system domain is file to
Part of a program where the shared memory is accessed and which should be executed invisibly, is called
There are 16 questions to complete.