.jpg "Operating System Mcq with Answers pdf")
1. What is Thread cancellation?
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the task of destroying the thread once its work is done
the task of removing a thread once its work is done
the task of terminating a thread before it has completed
2. Complete code files for which address has been, resolved for all global functions are?
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Exactable files
Object files
Source file
3. There is a set of page replacement algorithms that can never exhibit Belady’s Anomaly, called
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queue algorithms
stack algorithms
string algorithms
4. System call is also known as
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Monitor call
CPU call
Execution call
5. Memory management is
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Not used in modern operating systems
Replaced with virtual memory on current systems
Not used on multiprogramming systems
6. Software may trigger an interrupt by executing a special operation called a
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Recovery call
System call
Process call
7. Header contains information of ?
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Position, Size, the value of pc& register
Length, data & index
Size, pointer, function
8. Which of the following processor has a fixed length of instructions?
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cisc
risc
epic
9. The many-to-one model maps many user-level threads to one
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Kernel thread
User thread
Memory thread
10. A monitor is a module that encapsulates
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shared data structures
procedures that operate on shared data structure
synchronization between concurrent procedure invocation
11. What is the reusable resource?
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that can be used by one process at a time and is not depleted by that use
that can be used by more than one process at a time
that can be shared between various threads
12. FIFO scheduling is
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Fair-share scheduling
Deadline scheduling
Non-preemptive scheduling
13. A semaphore is a shared integer variable
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that can not drop below zero
that can not be more than zero
that can not drop below one
14. When a process terminates then all its children must also be terminated. This phenomenon is called
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Progressive termination
Recursive termination
Cascading termination
15. The systems which allows only one process execution at a time, are called
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uniprogramming systems
uniprocessing systems
unitasking systems
16. In operating system, each process has its own
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address space and global variables
open files
pending alarms, signals and signal handlers
17.If a process fails, most operating system write the error information to a
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log file
another running process
new file
18. Which of the following condition is required for deadlock to be possible?
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mutual exclusion
a process may hold allocated resources while awaiting assignment of other resources
no resource can be forcibly removed from a process holding it
19. CPU fetches the instruction from memory according to the value of
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program counter
status register
instruction register
20. Card reader is an example of
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Multi-tasking
Multiprogramming
Batch operating system
21. Program always deals with
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logical address
absolute address
physical address
22. The Operating System was first introduced, the primary goal was mainly to ___
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Share memory
User friendly
Optimize resources
23. ____ systems have more than one CPU in close communication with the others.
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Communication
Multiprocessor
Controller
24. Which of the following is a service not supported by the operating system:?
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Protection
Accounting
Compilation
25. Concurrent processes are processes that
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do not overlap in time
overlap in time
are executed by a processor at the same time
26. An operating system that can do multitasking means that ........
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The OS can divide up work between several CPUs.
Several programs can be operated concurrently
Multiple people can use the computer concurrently
27. A sequence of instruction telling the comp what to do is called
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Function
Program
Statements
28. A language whose statements have almost one to one correspondence to the instruction understood by the CP of computer is
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High-level language
Middle-level language
Assembly level
29. A table that indicates the name of all functions & global variables is?
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#Table
Symbol of table
Index table
30. Structure of UNIX used files is due to?
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Shared libraries
Virtual memory
Symbol table
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