Operating System Architecture Set 1

On This Page

This set of Operating System Architecture Multiple Choice Questions & Answers (MCQs) focuses on Operating System Architecture Set 1

Q1 | What is an internal command in Unix ?
  • commands that are executed directly by the kernel
  • commands that are executred directly by the shell
  • commands that are executed directly by shell and kernel
  • commands will have a process id running for it
Q2 | What is major device number ?
  • it is an index to the kernel table that contains the address of all device driver functions known to the system
  • it is an index to theuser process table that contains the address of all device driver functions known to the system
  • it is an index to the kernel table that contains the address of all files
  • it is an index to the kernel table that contains the address of all directories
Q3 | The game program,"space travel"for GECOS system was written in
  • basic
  • cobol
  • fortran
  • vb
Q4 | What does OSS stand for
  • open system software
  • original source software
  • open source software
  • original system server
Q5 | Which of the following is used to write disk block images from memory to disk
  • stty
  • cmd
  • sync
  • clri
Q6 | How many line are there are in the result of date command
  • three
  • one
  • two
  • five
Q7 | While providing a text processing system for the patent department at bell labs,the unix system was moved to in 1971
  • pdp-6
  • pdp-7
  • pdp-9
  • pdp-11
Q8 | What is minor device number           
  • it tells the device driver function what actual physical device it is talking
  • it tells the device driver functionwhat actual physiacl device it is talking to and i/0 buffernig scheme to be used for reading
  • it tells the device driver functionwhat actual physical device it is talking to and i/0 buffernig scheme to be used for writing
  • it tells the device driver functionwhat actual physiacl device it is talking to and i/0 buffernig scheme to be used for data transfer
Q9 | What is directory hierarchy ?
  • it is an organizational structure in which directories can contain files and other sub directories
  • it is an organizational structure in which directories can contain only files
  • it is an organizational structure in which directories can contain only sub directories
  • it is an organizational structure in which directory contains only one level
Q10 | what is the relationship of a filename to its inode
  • one to one
  • one to many
  • many to one
  • many to many
Q11 | Unix os was first rewritten in C in
  • 1971
  • 1972
  • 1973
  • 1974
Q12 | Among the directory entries inode and file contents which will be changed when a file is updated
  • only inode
  • only inode and file contents
  • only directory entry and file contents
  • none of the above
Q13 | what is the use of exec command
  • command that can be used to write files in shell scripts
  • command that can be used to read files in shell scripts
  • command that can be used to open files in shell scripts
  • all of the above
Q14 | Which of the following sections of an executable binary file has all un initialized data items
  • bss
  • data
  • header
  • symbol table
Q15 | The previous system administartor has put useless messages at login . What file do you edit to change the system message
  • /etc/motd
  • /etc/str
  • /etc/strtms
  • /etc/.conf
Q16 | Suppose that a process is in BLOCKED state waiting for some i/o service. When a service is completed, it goes to the
  • running state
  • ready state
  • suspended state
  • terminated state
Q17 | Buffering mechanisms regulated the data between
  • secondary storage device and memory
  • system call interface and device driver
  • kernel and secondary storage device
  • buffer cache and file system
Q18 | A thread is a ---- process
  • light weight
  • interface
  • heavy weight
  • inter thread
Q19 | A RAID system is useful because --
  • it increases interface performance
  • it increases speed of the processor
  • increases disk storage capacity
  • increase processor speed
Q20 | NFS stands for
  • normal file system
  • network file system
  • network format system
  • normal format system
Q21 | How many fields are there in /etc/passwd file
  • 3
  • 7
  • 10
  • 8
Q22 | Thomson and Ritchie published a paper describing unix system in
  • ieee xsactions on computers
  • international jouranal ofcomputer
  • communicatio-ns of the acm
  • internal " "os
Q23 | Command to reboot the system
  • shutdown -k now
  • shutdown -l now
  • shutdown -r now
  • shutdown -s now
Q24 | grep means
  • global regular expression print
  • global revearse expression print
  • global random expression print
  • global relative expression rpint
Q25 | A history file
  • contains list of files used during a session
  • contains list of directories used during a session
  • contains list of directories and sub directories used during a session
  • contains list of commands used during a session