what is Operating System?
Operating System is a computer program that manages the computer’s hardware and software resources. It’s the first program that runs on startup and it’s the foundation of all other programs and the operating system’s features enable the computer to function and perform tasks.
50 Important Operating System MCQ
1) Among the following, which one is not an operating system?
a) Windows
b) Linux
c) Oracle
d) DOS
Answer: (c) Oracle
2) What is the longest filename that can be used under DOS?
a) 4
b) 5
c) 8
d) 12
Answer: (c) 8
3) When did the first operating system come into existence?
a) 1948
b) 1949
c) 1950
d) 1951
Answer: (c) 1950
4) When did Microsoft Windows operating systems first come forward?
a) 1994
b) 1990
c) 1992
d) 1985
Answer: (d) 1985
5) Which of the following corresponds to Notepad’s extension?
.a) txt
b) .xls
c) .ppt
d) .bmp
Answer: (a) .txt
6) What else do you call a command interpreter?
a) prompt
b) kernel
c) shell
d) command
Answer: (c) shell
7) What does FAT’s entire name mean?
a) File attribute table
b) File allocation table
c) Font attribute table
d) Format allocation table
Answer: (b) File allocation table.
8) BIOS is used for?
a) By operating system
b) By compiler
c) By interpreter
d) By application software
Answer: (a) By operating system
9) What does the operating system term “booting” mean?
a) Restarting computer
b) Install the program
c) To scan
d) To turn off
Answer: (a) Restarting computer
10) When do page faults happen?
a) The page is present in memory.
b) The deadlock occurs.
c) The page is not present in memory.
d) The buffering occurs.
Answer: (c) The page does not present in memory.
11) Use of the Banker’s Algorithm?
a) To prevent deadlock
b) To deadlock recovery
c) To solve the deadlock
d) None of these
Answer: (a) To prevent deadlock
12) Where does a file go after you delete it from your computer?
a) Recycle bin
b) Hard disk
c) Taskbar
d) None of these
Answer: (a) Recycle bin
13) What kind of operating system is Linux?
a) Private operating system
b) Windows operating system
c) Open-source operating system
d) None of these
Answer: (c) Open-source operating system
14) What does the DSM’s official name mean?
a) Direct system module
b) Direct system memory
c) Demoralised system memory
d) Distributed shared memory
Answer: (d) Distributed shared memory
15) What does the IDL’s official name mean?
a) Interface definition language
b) Interface direct language
c) Interface data library
d) None of these
Answer: (a) Interface definition language
16) What is the term for bootstrapping?
a) Cold boot
b) Cold hot boot
c) Cold hot strap
d) Hot boot
Answer: (a) Cold boot
17) What use does the fence registration serve?
a) To disk protection
b) To CPU protection
c) To memory protection
d) None of these
Answer: (c) To memory protection
18) If the page size gets lengthy, the internal fragmentation also__________ .
a) Decreases
b) Increases
c) Remains constant
d) None of these
Answer: (b) Increases
19) Which of the following is an operating system designed for one user?
a) Windows
b) MAC
c) Ms-Dos
d) None of these
Answer: (c) Ms-Dos
20) Which one of the following factors determines the size of virtual memory?
a) CPU
b) RAM
c) Address bus
d) Data bus
Answer: (c) Address bus
21) A page number is referred to as a?if it cannot be located in the translation lookaside buffer.
a) Translation Lookaside Buffer miss
b) Buffer miss
c) Translation Lookaside Buffer hit
d) All of the mentioned
Answer: (a) Translation Lookaside Buffer miss
22) Among the following, which is not application software?
a) Windows 7
b) WordPad
c) Photoshop
d) MS-excel
Answer: (a) Windows 7
23) Which of the following offers 64-bit support for Windows?
a) Window XP
b) Window 2000
c) Window 1998
d) None of these
Answer: (a) Window XP
24) Which of the aforementioned windows lacks a start button?
a) Windows 7
b) Windows 8
c) Windows XP
d) None of these
Answer: (b) Windows 8
25) Which of the following operating systems does not permit the simultaneous use of multiple programs?
a) Linux
b) Windows
c) MAC
d) DOS
Answer: (d) DOS
26) Which of the following describes a situation when deadlock results?
a) Mutual exclusion
b) Hold and wait
c) ircular wait
d) No preemption
e) All of these
Answer: (e) All of these
27) Who creates the user interface for the operating system’s services?
a) API
b) System call
c) Library
d) Assembly instruction
Answer: (b) System call
28) Where is the list of waiting and ready-to-execute processes located?
a) Job queue
b) Ready queue
c) Execution queue
d) Process queue
Answer: (b) Ready queue
29) Who of the following has the ability to halt an active process?
a) Fork
b) Read
c) Down
d) All of these
Answer: (d) All of these
30) Which of the subsequent doesn’t stop the active process?
a) Timer interrupt
b) Device
c) Power failure
d) Scheduler process
Answer: (b) Scheduler process
31) What is Windows by Microsoft?
a) Operating system
b) Graphics program
c) Word Processing
d) Database program
Answer: (a) Operating system
32) Among the following, which one is a group of programs?
a) Accessories
b) Paint
c) Word
d) All of above
Answer: (a) Accessories
33) What one of the following is a real-time operating system?
a) MAC
b) MS-DOS
c) Windows 10
d) Process Control
Answer: (d) Process Control
34) Which operating system from the list below do you use for a client-server network?
a) MAC
b) Linux
c) Windows XP
d) Windows 2000
Answer: (d) Windows 2000
35) Which windows did My Computer receive?
a) Windows 10
b) Windows XP
c) Windows 95
d) Windows 98
Answer: (c) Windows 95
36) What kind of commands are necessary for different operations in DOS?
a) Internal commands
b) External commands
c) Valuable commands
d) Primary commands
Answer: (b) External commands
37) What is the primary file name of MS-primary DOS’s name in characters?
a) Up to 8 characters
b) 3 characters
c) Up to 10 characters
d) None of the above
Answer: (a) Up to 8 characters
38) What command is used to retrieve a recently deleted set of documents(.doc)?
a) Undelete
b) Undelete/all
c) Undelete *.doc
d) All of above
Answer: (c) Undelete *.doc
39) Which of the following describes system software?
a) Operating system
b) Compiler
c) Utilities
d) All of the above
Answer: (d) All of the above
40) Which application launches first when the machine boots and loads the GUI?
a) Desktop Manager
b) File Manager
c) Windows Explorer
d) Authentication
Answer: (d) Authentication
41) A disk’s swap space is primarily employed for:
a. Save process data
b. Save temporary HTML pages
c. Store the device drivers
d. Store the super-block
Answer: (a) Save process data
42) Which one of these page replacement algorithms exhibits Belady’s anomaly?
a. LRU
b. FIFO
c. Both LRU and FIFO
d. Optimal Page Replacement
Answer: (b) FIFO
43) A computer’s performance typically improves when its RAM is increased because:
a. Fewer page faults occur
b. Virtual memory increases
c. Fewer segmentation faults occur
d. A larger RAM is faster
Answer: (a) Fewer page faults occur
44) In a system, thrashing happens when:
a. The system’s processes commonly visit pages rather than memory.
b. A page fault pops up
c. The system’s processes are active and operating.
d. The system’s processes are in a state of awaited execution.
Answer: (a) The system’s processes commonly visit pages rather than memory.
45) There is a page fault when:
a.The memory does not contain the requested page.
b. It has the requested page in its memory.
c. An exception is thrown
d. The page is corrupted
Answer: (a) TThe memory does not contain the requested page.
46) The primary content(s) of each entry in a page table are:
a. Page frame number
b. Virtual page number
c. Page frame and virtual page numbers are both used.
d. Accessing the right information
Answer: (a) Page frame number
47) Which one of the following is not a type of memory?
a. translation lookaside buffer
b. instruction opcode
c. instruction register
d. instruction cache
Answer: (b)instruction opcode
48) Which one of these is NOT shared by threads within the same process?
a. Address Space
b. Stack
c. Message Queue
d. File Descriptor Table
Answer: (b)Stack
49) Which disk scheduling strategy causes the least amount of head movement?
a. Circular scan
b. Elevator
c. FCS
d. None of the above
Answer: (a) Circular scan
50) Which of the following requires a device driver?
a. Main memory
b. Disk
c. Register
d. Cache
Answer: (b)Disk
