McqMate
| 1. |
What is an internal command in Unix ? |
| A. | commands that are executed directly by the kernel |
| B. | commands that are executred directly by the shell |
| C. | commands that are executed directly by shell and kernel |
| D. | commands will have a process id running for it |
| Answer» B. commands that are executred directly by the shell | |
| 2. |
What is major device number ? |
| A. | it is an index to the kernel table that contains the address of all device driver functions known to the system |
| B. | it is an index to theuser process table that contains the address of all device driver functions known to the system |
| C. | it is an index to the kernel table that contains the address of all files |
| D. | it is an index to the kernel table that contains the address of all directories |
| Answer» A. it is an index to the kernel table that contains the address of all device driver functions known to the system | |
| 3. |
The game program,"space travel"for GECOS system was written in |
| A. | basic |
| B. | cobol |
| C. | fortran |
| D. | vb |
| Answer» C. fortran | |
| 4. |
What does OSS stand for |
| A. | open system software |
| B. | original source software |
| C. | open source software |
| D. | original system server |
| Answer» C. open source software | |
| 5. |
Which of the following is used to write disk block images from memory to disk |
| A. | stty |
| B. | cmd |
| C. | sync |
| D. | clri |
| Answer» C. sync | |
| 6. |
How many line are there are in the result of date command |
| A. | three |
| B. | one |
| C. | two |
| D. | five |
| Answer» B. one | |
| 7. |
While providing a text processing system for the patent department at bell labs,the unix system was moved to in 1971 |
| A. | pdp-6 |
| B. | pdp-7 |
| C. | pdp-9 |
| D. | pdp-11 |
| Answer» D. pdp-11 | |
| 8. |
What is minor device number |
| A. | it tells the device driver function what actual physical device it is talking |
| B. | it tells the device driver functionwhat actual physiacl device it is talking to and i/0 buffernig scheme to be used for reading |
| C. | it tells the device driver functionwhat actual physical device it is talking to and i/0 buffernig scheme to be used for writing |
| D. | it tells the device driver functionwhat actual physiacl device it is talking to and i/0 buffernig scheme to be used for data transfer |
| Answer» D. it tells the device driver functionwhat actual physiacl device it is talking to and i/0 buffernig scheme to be used for data transfer | |
| 9. |
What is directory hierarchy ? |
| A. | it is an organizational structure in which directories can contain files and other sub directories |
| B. | it is an organizational structure in which directories can contain only files |
| C. | it is an organizational structure in which directories can contain only sub directories |
| D. | it is an organizational structure in which directory contains only one level |
| Answer» A. it is an organizational structure in which directories can contain files and other sub directories | |
| 10. |
what is the relationship of a filename to its inode |
| A. | one to one |
| B. | one to many |
| C. | many to one |
| D. | many to many |
| Answer» C. many to one | |
| 11. |
Unix os was first rewritten in C in |
| A. | 1971 |
| B. | 1972 |
| C. | 1973 |
| D. | 1974 |
| Answer» C. 1973 | |
| 12. |
Among the directory entries inode and file contents which will be changed when a file is updated |
| A. | only inode |
| B. | only inode and file contents |
| C. | only directory entry and file contents |
| D. | none of the above |
| Answer» B. only inode and file contents | |
| 13. |
what is the use of exec command |
| A. | command that can be used to write files in shell scripts |
| B. | command that can be used to read files in shell scripts |
| C. | command that can be used to open files in shell scripts |
| D. | all of the above |
| Answer» C. command that can be used to open files in shell scripts | |
| 14. |
Which of the following sections of an executable binary file has all un initialized data items |
| A. | bss |
| B. | data |
| C. | header |
| D. | symbol table |
| Answer» A. bss | |
| 15. |
The previous system administartor has put useless messages at login . What file do you edit to change the system message |
| A. | /etc/motd |
| B. | /etc/str |
| C. | /etc/strtms |
| D. | /etc/.conf |
| Answer» A. /etc/motd | |
| 16. |
Suppose that a process is in BLOCKED state waiting for some i/o service. When a service is completed, it goes to the |
| A. | running state |
| B. | ready state |
| C. | suspended state |
| D. | terminated state |
| Answer» B. ready state | |
| 17. |
Buffering mechanisms regulated the data between |
| A. | secondary storage device and memory |
| B. | system call interface and device driver |
| C. | kernel and secondary storage device |
| D. | buffer cache and file system |
| Answer» D. buffer cache and file system | |
| 18. |
A thread is a ---- process |
| A. | light weight |
| B. | interface |
| C. | heavy weight |
| D. | inter thread |
| Answer» A. light weight | |
| 19. |
A RAID system is useful because -- |
| A. | it increases interface performance |
| B. | it increases speed of the processor |
| C. | increases disk storage capacity |
| D. | increase processor speed |
| Answer» C. increases disk storage capacity | |
| 20. |
NFS stands for |
| A. | normal file system |
| B. | network file system |
| C. | network format system |
| D. | normal format system |
| Answer» B. network file system | |
| 21. |
How many fields are there in /etc/passwd file |
| A. | 3 |
| B. | 7 |
| C. | 10 |
| D. | 8 |
| Answer» B. 7 | |
| 22. |
Thomson and Ritchie published a paper describing unix system in |
| A. | ieee xsactions on computers |
| B. | international jouranal of computer |
| C. | communicatio-ns of the acm |
| D. | internal " "os |
| Answer» C. communicatio-ns of the acm | |
| 23. |
Command to reboot the system |
| A. | shutdown -k now |
| B. | shutdown -l now |
| C. | shutdown -r now |
| D. | shutdown -s now |
| Answer» C. shutdown -r now | |
| 24. |
grep means |
| A. | global regular expression print |
| B. | global revearse expression print |
| C. | global random expression print |
| D. | global relative expression rpint |
| Answer» A. global regular expression print | |
| 25. |
A history file |
| A. | contains list of files used during a session |
| B. | contains list of directories used during a session |
| C. | contains list of directories and sub directories used during a session |
| D. | contains list of commands used during a session |
| Answer» D. contains list of commands used during a session | |
| 26. |
Programs like shell and editors (ed and vi) interact with the kernal by invoking |
| A. | system calls |
| B. | systems hardware |
| C. | n/w program |
| D. | interfacing hardware |
| Answer» A. system calls | |
| 27. |
Internal or external command is checked using |
| A. | ls |
| B. | tty |
| C. | etc |
| D. | type |
| Answer» D. type | |
| 28. |
The standard name for executable files produced by c compiler is |
| A. | b.out |
| B. | c.out |
| C. | a.out |
| D. | d.out |
| Answer» C. a.out | |
| 29. |
script is run for successful login |
| A. | /etc/profile |
| B. | /etc/str |
| C. | /etc/strtms |
| D. | /etc/.conf |
| Answer» A. /etc/profile | |
| 30. |
The root node in the file system is write as |
| A. | / |
| B. | \\ |
| C. | /.. |
| D. | ../ |
| Answer» A. / | |
| 31. |
interacts with inner part of kernel |
| A. | interface |
| B. | shell |
| C. | terminal |
| D. | compiler |
| Answer» B. shell | |
| 32. |
is used to stop a process |
| A. | kill |
| B. | remove |
| C. | clear |
| D. | overt |
| Answer» A. kill | |
| 33. |
directory attributes are displayed by |
| A. | ls-l-a |
| B. | ls-l-b |
| C. | ls-l-c |
| D. | ls-l-d |
| Answer» D. ls-l-d | |
| 34. |
The x in the cat x command is |
| A. | binary file |
| B. | data file |
| C. | text file |
| D. | source file |
| Answer» A. binary file | |
| 35. |
what is the run level for shut down and reboot respectively |
| A. | 0 and 6 |
| B. | 1 and 6 |
| C. | 0 and 4 |
| D. | 1 and 4 |
| Answer» A. 0 and 6 | |
| 36. |
The text formatting program traff |
| A. | expects to find new line character at the end of each line of text |
| B. | expects to find last character at the end of each line of text |
| C. | expects to find each line of text |
| D. | expects to neglect each line of text |
| Answer» A. expects to find new line character at the end of each line of text | |
| 37. |
The system acctcom accounting program |
| A. | expects to find variable length records |
| B. | expects to find fixed length record |
| C. | expects to sort the records |
| D. | expects to merge the records |
| Answer» B. expects to find fixed length record | |
| 38. |
permission to access the file is controlled by |
| A. | n/w structure |
| B. | directory structure |
| C. | access permissions |
| D. | file structure |
| Answer» C. access permissions | |
| 39. |
To the user,the unix system treats devices as if they are |
| A. | devices |
| B. | interfaces |
| C. | hardware |
| D. | files |
| Answer» D. files | |
| 40. |
Two invocations copy copy.c newcopy.c copy copy newcopy |
| A. | 1st is carrect |
| B. | 2nd is carrect |
| C. | both carrect |
| D. | both wrong |
| Answer» C. both carrect | |
| 41. |
In processing environment of unix |
| A. | a program is an executable file and process is an instance of the program in execution |
| B. | a process is an executable file and program is a instance of the process in execution |
| C. | a process and program are both same |
| D. | all above are carrect |
| Answer» A. a program is an executable file and process is an instance of the program in execution | |
| 42. |
The fork system call |
| A. | creates a new program |
| B. | creates a new interface |
| C. | creates a new hardware |
| D. | creates a new process |
| Answer» D. creates a new process | |
| 43. |
What command do you have to use to go to parent directory |
| A. | cd-, |
| B. | cd - |
| C. | cd/up |
| D. | cd.. |
| Answer» D. cd.. | |
| 44. |
The command used to display a specified file |
| A. | mkdir |
| B. | chmod |
| C. | cat |
| D. | compress |
| Answer» C. cat | |
| 45. |
root in unix system is represented by |
| A. | % |
| B. | \\ |
| C. | $ |
| D. | / |
| Answer» D. / | |
| 46. |
what does cd.. Do ? |
| A. | not a valid unix command |
| B. | logs out of the computer |
| C. | changes the working directory to login directory |
| D. | " " " " " " the parent of current working directory |
| Answer» D. " " " " " " the parent of current working directory | |
| 47. |
What does command LS do |
| A. | opening a file |
| B. | display contents of a file |
| C. | display of file & folders, present in the folder where you are |
| D. | shows a calender |
| Answer» C. display of file & folders, present in the folder where you are | |
| 48. |
Why is PWD used |
| A. | show current user |
| B. | show present working directory |
| C. | to display error messages |
| D. | to copy files |
| Answer» B. show present working directory | |
| 49. |
Which is the carrect command to list files & folders in unix |
| A. | list |
| B. | ls |
| C. | dir |
| D. | list files |
| Answer» B. ls | |
| 50. |
How can you display a list of files including hidden files |
| A. | find all |
| B. | ls-a |
| C. | ls-b |
| D. | all answers a,b,c |
| Answer» B. ls-a | |
| 51. |
Which command makes an empty directory |
| A. | mkdirectory |
| B. | makedirectory |
| C. | mkdir |
| D. | newdir |
| Answer» C. mkdir | |
| 52. |
Why is man command used |
| A. | to shut down |
| B. | search all files |
| C. | deleting files |
| D. | getting help command on format |
| Answer» D. getting help command on format | |
| 53. |
Which of the following features of unix may be used for interprocess communication |
| A. | signals |
| B. | pipes |
| C. | semaphores |
| D. | all of these |
| Answer» D. all of these | |
| 54. |
In a system,if 5 people are currently using the vi editor,then the number of corresponding processes will be |
| A. | 1 |
| B. | 5 |
| C. | 2 |
| D. | 0 |
| Answer» B. 5 | |
| 55. |
The command echo welcome >/dev/tty |
| A. | echoes welcome in all the terminals that are switched on |
| B. | echoes welcome in all the " that are logged on |
| C. | echoes welcome only in the terminal in which it is run |
| D. | both (a) and ( c) |
| Answer» D. both (a) and ( c) | |
| 56. |
/dev/null |
| A. | is a file |
| B. | has write permission for all |
| C. | is the unix builtin dustbin |
| D. | all of these |
| Answer» D. all of these | |
| 57. |
The advantage of binary files over text files is that |
| A. | it is compact |
| B. | it can be accessed faster |
| C. | they are more reliable |
| D. | all of these |
| Answer» D. all of these | |
| 58. |
The permission bits of a filenoname,can be set to - rws - - * - - * by the command |
| A. | chmod 711 noname |
| B. | chmod go -rw noname |
| C. | chmod 2711 noname |
| D. | none of above |
| Answer» D. none of above | |
| 59. |
/bin/passwork has the user execution permission set to 's' because |
| A. | this facility assigns to the user, permissions of the program owner temporarily |
| B. | it should allow users who don\t have write permission to /etc/passwd to write to it |
| C. | /etc/passwd is write protected |
| D. | all of these |
| Answer» D. all of these | |
| 60. |
If are does not want anyone else to read or write to a file named datfile,except through a program in a file filex,then he may use |
| A. | chmod u+s filex; chmod go -rw datfile |
| B. | chmod 4711 filex; chmod go -rw datfile |
| C. | chmod 4711 datfile; chmod go - rw filex |
| D. | both a & b |
| Answer» D. both a & b | |
| 61. |
Writing a c program that accepts input from keyboard,rather than from a file is advantageous because |
| A. | keyboard is a file that is already open |
| B. | it can be used in a pipe,if it writes to stdout |
| C. | both a & b |
| D. | non of above |
| Answer» C. both a & b | |
| 62. |
Consider the following program main ( )
|
| A. | redirects the output of date to a file out f |
| B. | displays the output of date on the screen |
| C. | prints everything on screen |
| D. | prints the two messages on the screen |
| Answer» A. redirects the output of date to a file out f | |
| 63. |
The Hardware at centre of UNIX system provides…………. |
| A. | basic services |
| B. | operating system with basic services |
| C. | kernel service |
| D. | none of these |
| Answer» B. operating system with basic services | |
| 64. |
Operating System is also called as ………. |
| A. | system kernel |
| B. | kernel |
| C. | both a and b |
| D. | none of these |
| Answer» C. both a and b | |
| 65. |
Program such as Shell and editors interact with kernel by invoking ………. |
| A. | process |
| B. | thread |
| C. | system calls |
| D. | none of these |
| Answer» C. system calls | |
| 66. |
…………responsible for exchanging data between kernel and programs |
| A. | system calls |
| B. | thread |
| C. | process |
| D. | none of these |
| Answer» A. system calls | |
| 67. |
what is a.out ? |
| A. | system user program |
| B. | private user program |
| C. | local program |
| D. | none of these |
| Answer» B. private user program | |
| 68. |
How many system calls in system V |
| A. | 32 |
| B. | 64 |
| C. | 128 |
| D. | 16 |
| Answer» B. 64 | |
| 69. |
Out of 64 system calls in system V how many are frequently used… |
| A. | 64 |
| B. | 32 |
| C. | 16 |
| D. | 128 |
| Answer» B. 32 | |
| 70. |
Non leaf node of the file system structure is ………….. |
| A. | leaf node of file |
| B. | directory of file |
| C. | regular file |
| D. | path name |
| Answer» B. directory of file | |
| 71. |
Full path name starts with ….. |
| A. | dot |
| B. | slash |
| C. | double slash |
| D. | non of these |
| Answer» B. slash | |
| 72. |
Text formatting program troff find …………. character at the end of each line |
| A. | newline |
| B. | slash |
| C. | dot |
| D. | none of these |
| Answer» A. newline | |
| 73. |
System accounting program acctcom find ………. |
| A. | variable length record |
| B. | fixed length record |
| C. | no record |
| D. | none of these |
| Answer» B. fixed length record | |
| 74. |
Directories are ……. |
| A. | fixed files |
| B. | regular files |
| C. | variable files |
| D. | none of these |
| Answer» B. regular files | |
| 75. |
System treats the data in a directory as a …………….. |
| A. | byte stream |
| B. | bit stream |
| C. | stream |
| D. | none of these |
| Answer» A. byte stream | |
| 76. |
what is use of ls command ? |
| A. | to list names and attribute of files |
| B. | to list size of files |
| C. | to list length of files |
| D. | none of these |
| Answer» A. to list names and attribute of files | |
| 77. |
Access permission can be set to ………… |
| A. | the file owner |
| B. | a file group |
| C. | everyone else |
| D. | all of these |
| Answer» D. all of these | |
| 78. |
The Newly created files are ………….. of the file system directory structure. |
| A. | main nodes |
| B. | root nodes |
| C. | leaf nodes |
| D. | middle nodes |
| Answer» C. leaf nodes | |
| 79. |
Unix system treats devices as a …….. |
| A. | hardware |
| B. | file |
| C. | byte |
| D. | none of these |
| Answer» B. file | |
| 80. |
Permission mode on newly created file will be…… |
| A. | 0666(octal) |
| B. | 0666(hexadecimal) |
| C. | 0999(octal) |
| D. | 0798(hex) |
| Answer» A. 0666(octal) | |
| 81. |
Permission mode 0666(octal) means………… |
| A. | allowing all users acess to file for writing |
| B. | allowing all users acess to file for reading |
| C. | restrict to read and write |
| D. | allowing all users access to file for reading writing |
| Answer» D. allowing all users access to file for reading writing | |
| 82. |
All system calls return ……..if open or create call fails |
| A. | -2 |
| B. | 0 |
| C. | 1 |
| D. | -1 |
| Answer» D. -1 | |
| 83. |
The open and create system calls returns an integer called a ………. |
| A. | file number |
| B. | file discriptor |
| C. | file variable |
| D. | none of these |
| Answer» B. file discriptor | |
| 84. |
File discriptor programs uses………………... |
| A. | to delete file |
| B. | to save file |
| C. | for subsequent references for file |
| D. | none of these |
| Answer» C. for subsequent references for file | |
| 85. |
The read system calls return 0 when ……….. |
| A. | it reaches middle of file |
| B. | it reaches end of the file |
| C. | file is empty |
| D. | none of these |
| Answer» B. it reaches end of the file | |
| 86. |
When a process makes a system call ,its mode changes from……… |
| A. | user to kernel |
| B. | kernel to user |
| C. | restricted to unrestricted |
| D. | unrestricted to restricted |
| Answer» A. user to kernel | |
| 87. |
The new process called, child process gets a ………... return value from fork. |
| A. | -1 |
| B. | 0 |
| C. | 2 |
| D. | 1 |
| Answer» B. 0 | |
| 88. |
The child process invoke …….to execute program copy . |
| A. | fork |
| B. | execl |
| C. | wait |
| D. | printf |
| Answer» B. execl | |
| 89. |
Which of the following system calls transforms an executable binary file into a process? |
| A. | fork |
| B. | exec |
| C. | ioct1 |
| D. | longjmp |
| Answer» B. exec | |
| 90. |
Which of the following file names can be found in more than one directory? |
| A. | passwd |
| B. | bin |
| C. | date |
| D. | none of the above |
| Answer» A. passwd | |
| 91. |
The command that can be used to restrict incoming messages to a user is……….. |
| A. | mesg |
| B. | halt |
| C. | grep |
| D. | sleep |
| Answer» A. mesg | |
| 92. |
The sort command in UNIX …. |
| A. | used to sort a file |
| B. | used to sort the list of files in a directory |
| C. | both a and b |
| D. | none of the above |
| Answer» A. used to sort a file | |
| 93. |
Which command is used to remove a directory? |
| A. | rd |
| B. | rmdir |
| C. | dldir |
| D. | rdir |
| Answer» B. rmdir | |
| 94. |
The tail command in UNIX…… |
| A. | can be used to look at the tail or bottom of the file |
| B. | can be used to display the list of last 10 files in the current directory |
| C. | can be used to display the list of last 15 in the current directory |
| D. | none of the above |
| Answer» A. can be used to look at the tail or bottom of the file | |
| 95. |
Which command is used to remove a file …… |
| A. | rename |
| B. | mv |
| C. | rm |
| D. | del |
| Answer» C. rm | |
| 96. |
Which command will be used with vi editor to append text at end of line? |
| A. | a |
| B. | i |
| C. | a |
| D. | l |
| Answer» A. a | |
| 97. |
Which of the following command the file names in multiple columns? |
| A. | is–x |
| B. | is |
| C. | is–1 |
| D. | is–f–x |
| Answer» B. is | |
| 98. |
Which command is used to display the device name of the terminal you are using? |
| A. | who |
| B. | ls |
| C. | tty |
| D. | stty |
| Answer» C. tty | |
| 99. |
Which command allows you to view your file 24 lines at a time ? |
| A. | more |
| B. | cat |
| C. | pg |
| D. | none of the above |
| Answer» A. more | |
| 100. |
Which of the following is not a communication command? |
| A. | write |
| B. | |
| C. | mesg |
| D. | grep |
| Answer» D. grep | |
Done Reading?