Operating Systems Flashcards
Operating system is a
software
‘Open files’ is a system call provided under _________ of operating
system.
Information management
Program under execution is known as __________.
Process
_______is a service of memory management of operating system.
Allocate a chunk of memory
Windows 98 is a __________ operating system.
Single user multitasking
_______ is a free operating system.
Linux
In Magnetic tapes __________ access method is used.
Sequential
Concentric circles on disk surface are known as _______.
Tracks
Time taken to adjust the appropriate sector under read /write head in disk
is called as ____________.
Latency Time
Device drivers are ____________
Software Programs
A terminal or VDU means _______________.
Visual Display Unit
____ is a logical unit of data that operating system defines for its
convenience.
Block
In multiprogramming operating system, the number of processes running
simultaneously is known as _______.
Degree of multiprogramming
When a process is waiting for an external event like I/O, it is in
___________ state.
Blocked
In Non-preemptive philosophy of process scheduling throughput \_\_\_\_\_\_\_\_\_\_ i) Decreases ii) Increases iii) Remains constant iv) Has no effect
Increases
_______ process scheduling is most suitable for real time systems.
i) Slow
ii) Non preemptive
iii) Preemptive
iv) Single
Preemptive
_________ is also known as light weight process.
i) Thread
ii) Program
iii) Time slice
iv) Operating system
Thread
Operating system maintains all the information about each process in a data structure called \_\_\_\_\_\_\_\_ i) Process List ii) Process control block iii) Process schedule iv) Process philosophy
Process control block
Memory management service of operating system manages allocations of \_\_\_\_\_\_\_ i) Disk based memory ii) Tape based memory iii) Main memory iv) Flash memory
Main memory
________ is a non contiguous real memory management system.
i) Fixed partitioned
ii) Variable partitioned
iii) Single contiguous
iv) Paging
Paging
In \_\_\_\_\_\_\_\_\_\_\_ method of memory management system logical divisions of a program are of variable sizes. i) Segmentation ii) Paging iii) Variable partitioned iv) Fixed partitioned.
Segmentation
Wastage of memory space within the partition is called as __________
i) Compaction
ii) Internal fragmentation
iii) External fragmentation
iv) Dirty page
Internal fragmentation
If page size of 4MB memory is 2 kb then the number of higher order bits
on address bus, used to denote page numbers is _________
i) 8
ii) 9
iii) 10
iv) 11
11
When a page which is not in main memory is reference then \_\_\_\_\_\_\_\_\_ occurs. i) Locality of reference ii) Page fault iii) Dirty bit iv) System crash
Page fault
_______ cannot work independently.
i) Operating system
ii) Drivers
iii) Virus
iv) Worm
Virus
\_\_\_\_\_\_\_\_\_ spread more rapidly in computer networks but do not cause direct harm to computer system. i) Worms ii) Memory resident virus iii) Boot sector virus iv) Bomb
Worms
\_\_\_\_\_\_\_\_ control in GUI allows to select only one option from the given options. i) Check button ii) Entry box iii) Push button iv) Radio button
Radio button
\_\_\_\_\_\_\_\_ is generally used in GUI to look at the information which is not currently visible on screen. i) Menu bar ii) Scroll bar iii) Push button iv) Check button
Scroll bar
________ is not an operating system.
i) DOS
ii) WINDOWS
iii) LINUX
iv) C++
C++
\_\_\_\_\_\_\_ is allotted to every process so that a process does not use the CPU indefinitely. i) Context ii) Priority iii) Time slice iv) Process control block
Time slice
