All MCQ for Operating System for test preparation of Public Service Commission, FPSC, PPSC, SPSC, NWFP PSC, Blochistan PSC, CSS, PCS, PMS for Lecturer and Subject Specialist,GAT, GRE (NTS)test
Fragmentation: _______________
Option 1
|
fragments of memory words unused in page |
Option 2
|
fragments of memory words used in a page |
Option 3
|
None of these |
Option 4
|
All of these |
_______________ system is a real- time system?
Option 1
|
online railway reservation |
Option 2
|
Aircraft control |
Option 3
|
Payroll processing |
Option 4
|
All of these |
_________ state transition that is initiated by the user process itself.
Option 1
|
ready |
Option 2
|
block |
Option 3
|
wakeup |
Option 4
|
none of the these |
Processes which _____________are called concurrent processes.
Option 1
|
overlap in time |
Option 2
|
are executed at the same time by processor |
Option 3
|
do not overlap in time |
Option 4
|
none of these |
When _______________ then Page fault occurs
Option 1
|
the page is not in main memory |
Option 2
|
the page is corrupted by any program |
Option 3
|
All of these |
Option 4
|
none of these |
Example of a SPOOLED device is_______________
Option 1
|
The primary memory device in a virtual memory system. |
Option 2
|
A line printer used to print the output a number of jobs |
Option 3
|
The terminal used to enter the input data for a program being executed. |
Option 4
|
None of the above |
Dijkstra’s banking algorithm is used to solve problem of ___________________ in operating system.
Option 1
|
context switching |
Option 2
|
deadlock avoidance |
Option 3
|
mutual exclusion |
Option 4
|
None of these |
A set of instructions that access common shared resource which exclude one another in time is call______
Option 1
|
None critical region |
Option 2
|
Critical region |
Option 3
|
Critical system |
Option 4
|
None of the these |
Necessary conditions for deadlock are
Option 1
|
Mutual exclusion and partial allocation |
Option 2
|
non-preemption and circular wait |
Option 3
|
none of these |
Option 4
|
All of these |
In paged memory systems, if the page size is increased, then the internal fragmentation generally
Option 1
|
becomes more |
Option 2
|
becomes less |
Option 3
|
remain constant |
Option 4
|
All of the these |