1. In the instruction ADD A, B, the answer gets stored in
2. What does PC stand for?
-
program changer
program counter
performance counter
3. Which of the following holds the last instruction fetched?
4. The portion of the processor which contains the hardware required to fetch the operations is
-
datapath
processor
control
5. The backing store is generally a
-
fast disk
disk large enough to accommodate copies of all memory images for all users
disk to provide direct access to the memory images
6. When the head damages the magnetic surface, it is known as
-
disk crash
head crash
magnetic damage
7. The process to be aborted is chosen on the basis of the following factors?
- priority of the process
process is interactive or batch
how long the process has computed
8. What is the disk bandwidth?
-
the total number of bytes transferred
total time between the first request for service and the completion on the last transfer
the total number of bytes transferred divided by the total time between the first request for service and the completion on the last transfer
9. The primary distinction between the short term scheduler and the long term scheduler is :
-
The length of their queues
The type of processes they schedule
The frequency of their execution
10. Which of the following Is not a part of the operating system?
-
Input/output control program
Job control program
Supervisor
11. The number of sign bits in a 32-bit IEEE format is
12. The transfer between CPU and Cache is
-
block transfer
word transfer
set transfer
13. Computer has a built-in system clock that emits millions of regularly spaced electric pulses per called clock cycles.
-
second
millisecond
microsecond
14. What is thrashing?
-
A high paging activity is called thrashing.
A high executing activity is called thrashing
A extremely long process is called thrashing
15. Magnetic tape drives can write data at a speed disk drives.
-
much lesser than
comparable to
much faster than
16. Which types of file organization are supported by Magnetic Tape?
-
Contiguous Sequential File
Random Files
Indexed Sequential File
17. Which of the following is not a popular desktop operating system?
-
iOS
Android
Mountain Lion
18. In UNIX, the system call is used to send a signal.
-
sig
send
kill
19. Windows operating system follows __________ type of kernel architecture
-
Monolithic
Micro
Macro
20. What is interprocess communication?
-
communication within the process
communication between two process
communication between two threads of same process
21. Thread pools are useful when
-
when we need to limit the number of threads running in the application at the same time
when we need to limit the number of threads running in the application as a whole
when we need to arrange the ordering of threads
22. Resource sharing helps
-
share the memory and resources of the process to which the threads belong
an application have several different threads of activity all within the same address space
reduce the address space that a process could potentially use
23. The kernel is of user threads.
-
a part of
the creator of
unaware of
24. Because the kernel thread management is done by the Operating System itself
-
kernel threads are faster to create than user threads
kernel threads are slower to create than user threads
kernel threads are easier to manage as well as create then user threads
25. If a kernel thread performs a blocking system call,
-
the kernel can schedule another thread in the application for execution
the kernel cannot schedule another thread in the same application for execution
the kernel must schedule another thread of a different application for execution
26. FCFS algorithm is used by
-
FIFO
LIFO
LIFO and FIFO
27. The macro process must perform
- Recognize macro definitions and macrocells
Save the macro definitions
Expand macro calls and substitute arguments
28. The memory implemented using the semiconductor chips is
-
cache
main
secondary
29. Which of the following is the fastest means of memory access for CPU?
-
registers
cache
main memory
30. A process in general needs certain recourses
-
CPU time
Memory
I/O Device
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