| 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
view more info and meaning of NFS 
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| 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 | |
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