McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Computer Science Engineering (CSE) .
| 301. |
The first thing that is searched when a command references a file is its |
| A. | i node |
| B. | i node number |
| C. | permission |
| D. | none of the above |
| Answer» B. i node number | |
| 302. |
Profilers are |
| A. | tools that analyze the run time behavior of a program |
| B. | tools that check c code for cross file consistency |
| C. | tools that keep track of evolving versions of a file |
| D. | none of the above |
| Answer» A. tools that analyze the run time behavior of a program | |
| 303. |
Which of the following tools can be used to keep track of evolving version of a file? |
| A. | make |
| B. | yacc |
| C. | sccs |
| D. | dv |
| Answer» C. sccs | |
| 304. |
The size of any block in the unix file system is |
| A. | 512 bytes |
| B. | 1024 bytes |
| C. | 2048 bytes |
| D. | any of the above |
| Answer» D. any of the above | |
| 305. |
To find the block size on your file system the command is |
| A. | blksz |
| B. | szblk |
| C. | chksz |
| D. | cmchk |
| Answer» D. cmchk | |
| 306. |
Each entry in inode table is of size |
| A. | 64 kb |
| B. | 32kb |
| C. | 32 bytes |
| D. | 64 bytes |
| Answer» D. 64 bytes | |
| 307. |
The program contained in boot block, that loads kernel into memory is called |
| A. | disk bootstrap program |
| B. | master boot program |
| C. | shell program |
| D. | none of the above |
| Answer» A. disk bootstrap program | |
| 308. |
The state of the file system is contained in |
| A. | boot block |
| B. | a special block created by book block |
| C. | super block |
| D. | none of the above |
| Answer» C. super block | |
| 309. |
Which file gets executed when we use the passwd command |
| A. | /etc/passwd |
| B. | /etc/pwd |
| C. | /bin/passwd |
| D. | /passwd |
| Answer» C. /bin/passwd | |
| 310. |
The command cal j 1997 would give the output as |
| A. | the calendar of jan,june and july 1997 |
| B. | only calendar of jan 1997 |
| C. | an error |
| D. | none of the above |
| Answer» C. an error | |
| 311. |
To see the last access time of various files in a file system the command is |
| A. | is-iu |
| B. | is-i |
| C. | is-acc |
| D. | is-mt |
| Answer» A. is-iu | |
| 312. |
To ascertain what are the contents of the file in your the system the best way would be |
| A. | do a cat command on each file and find its contents |
| B. | use the command cat* |
| C. | use the command file* |
| D. | none of the above |
| Answer» C. use the command file* | |
| 313. |
Which of these is not a command of Unix related with DOS |
| A. | dosdir a:proj |
| B. | doscopy trial a:/ |
| C. | doscp/home/pro j/prg a:/ |
| D. | dosls |
| Answer» B. doscopy trial a:/ | |
| 314. |
How many links are created when we creat a directory file? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 315. |
A user creates a link to a file file1 using the following command “ln file1 file2”. Which of the following is not true? |
| A. | file1 and file2 have the same inode numbers |
| B. | the number of links for file1 is displayed as 1 |
| C. | the number of links for file1 is displayed as 2 |
| D. | the number of links for file2 is displayed as 2 |
| Answer» B. the number of links for file1 is displayed as 1 | |
| 316. |
here are two hard links to the “file1″ say hl and h2 and a softlink sl. What happens if we deleted the “file1″? |
| A. | we will still be able to access the file with hl and h2 but not with sl |
| B. | we will not be able to access the file with hl and h2 but with sl |
| C. | we will be able to access the file with any of hl, h2 and sl |
| D. | we will not be able to access the file with any of hl, h2 and sl |
| Answer» A. we will still be able to access the file with hl and h2 but not with sl | |
| 317. |
If two files on same partition point to the same inode structure they are called |
| A. | soft links |
| B. | hard links |
| C. | alias |
| D. | special files |
| Answer» B. hard links | |
| 318. |
Deleting a soft-link |
| A. | deletes the destination file |
| B. | deletes both the softlink and the destination file |
| C. | deletes just the softlink |
| D. | backup of the destination is automatically created |
| Answer» C. deletes just the softlink | |
| 319. |
Creation of hardlinks that point across partitions |
| A. | is allowed only to root user |
| B. | can be done by all users |
| C. | he effects are unspecified |
| D. | is not allowed |
| Answer» D. is not allowed | |
| 320. |
Which command is used to change permissions of files and directories? |
| A. | mv |
| B. | chgrp |
| C. | chmod |
| D. | set |
| Answer» C. chmod | |
| 321. |
Where can I find the printer in the file structure? |
| A. | /etc |
| B. | /dev |
| C. | /lib |
| D. | /printer |
| Answer» B. /dev | |
| 322. |
Which of the following statement is true? |
| A. | the cp command will preserve the meta data of the file |
| B. | the sort command by default sorts in the numeric order |
| C. | the mv command will preserve the meta data of the file |
| D. | the command ps will display the filesystem usage |
| Answer» C. the mv command will preserve the meta data of the file | |
| 323. |
What UNIX command is used to update the modification time of a file? |
| A. | time |
| B. | modify |
| C. | cat |
| D. | touch |
| Answer» D. touch | |
| 324. |
Which of the following time stamps need not exist for a file on traditional unix file system |
| A. | access time |
| B. | modification time |
| C. | creation time |
| D. | change time |
| Answer» C. creation time | |
| 325. |
Which command is used to set limits on file size |
| A. | fsize |
| B. | flimit |
| C. | ulimit |
| D. | usize |
| Answer» C. ulimit | |
| 326. |
Which option of rmdir command will remove all directories a, b, c if path is a/b/c |
| A. | –b |
| B. | –o |
| C. | –p |
| D. | –t |
| Answer» C. –p | |
| 327. |
Which represents the user home directory |
| A. | / |
| B. | . |
| C. | .. |
| D. | ~ |
| Answer» D. ~ | |
| 328. |
f a file is removed in Unix using ‘rm’ then |
| A. | the file can be recovered by a normal user |
| B. | the file cannot be recovered by a user |
| C. | the file can be fully recovered provided the sytem is not rebooted |
| D. | he file will be moved to /lost+found directory and can be recovered only by administrator’s intervention |
| Answer» B. the file cannot be recovered by a user | |
| 329. |
Executing the ‘cd ..’ command when at the root level causes |
| A. | error message indicating the user can’t access beyond the root level |
| B. | behavior is unix- flavor dependent |
| C. | results in changing to the ‘home’ directory |
| D. | nothing happens |
| Answer» D. nothing happens | |
| 330. |
How do you rename file “new” to file “old”? |
| A. | mv new old |
| B. | move new old |
| C. | cp new old |
| D. | rn new old |
| Answer» A. mv new old | |
| 331. |
What command is used to copy files and directories? |
| A. | copy |
| B. | cp |
| C. | rn |
| D. | cpy |
| Answer» B. cp | |
| 332. |
When mv f1 f2 is executed which file’s inode is freed? |
| A. | f1 |
| B. | f2 |
| C. | new inode will be used |
| D. | mplementation dependent |
| Answer» B. f2 | |
| 333. |
Any file’s attribute information is stored in which structure on the disk |
| A. | inode |
| B. | data blocks |
| C. | file blocks |
| D. | directory file |
| Answer» A. inode | |
| 334. |
The file permission 764 means |
| A. | every one can read, group can execute only and the owner can read and write |
| B. | every one can read and write, but owner alone can execute |
| C. | every one can read, group including owner can write, owner |
| D. | every one can read and write and execute |
| Answer» C. every one can read, group including owner can write, owner | |
| 335. |
The permission -rwxr–r– represented in octal expression will be |
| A. | 777 |
| B. | 666 |
| C. | 744 |
| D. | 711 |
| Answer» C. 744 | |
| 336. |
Effective user id can be set using following permission |
| A. | 777 |
| B. | 2666 |
| C. | 4744 |
| D. | 1711 |
| Answer» C. 4744 | |
| 337. |
Effective group id can be set using following permission |
| A. | 777 |
| B. | 2666 |
| C. | 4744 |
| D. | 1711 |
| Answer» B. 2666 | |
| 338. |
Sticky bit can be set using following permission |
| A. | 777 |
| B. | 2666 |
| C. | 4744 |
| D. | 1711 |
| Answer» D. 1711 | |
| 339. |
The permission -rwSr–r– represented in octal expression will be |
| A. | 777 |
| B. | 2666 |
| C. | 4744 |
| D. | 4644 |
| Answer» D. 4644 | |
| 340. |
The permission -rwxr-sr– represented in octal expression will be |
| A. | 777 |
| B. | 2766 |
| C. | 2744 |
| D. | 2754 |
| Answer» D. 2754 | |
| 341. |
f user tries to remove (rm) a readonly file (444 permission), what will happen? |
| A. | the file is removed successfully (and silently) |
| B. | the rm command prompts for a confirmation, the command is successful upon confirmation |
| C. | he rm command prompts for a confirmation, however the operation fails because of insufficient permissions |
| D. | the rm command fails because of insufficient permissions |
| Answer» B. the rm command prompts for a confirmation, the command is successful upon confirmation | |
| 342. |
A user does a chmod operation on a file. Which of the following is true? |
| A. | the last accessed time of the file is updated |
| B. | the last modification time of the file is updated |
| C. | the last change time of the file is updated |
| D. | none of the above |
| Answer» C. the last change time of the file is updated | |
| 343. |
If the umask value is 0002. what will be the permissions of new directory |
| A. | 777 |
| B. | 775 |
| C. | 774 |
| D. | 664 |
| Answer» B. 775 | |
| 344. |
What is the command to set the execute permissions to all the files and subdirectories within the directory /home/user1/direct |
| A. | chmod –r +x /home/user1/direct |
| B. | chmod –r +x /home/user1/direct |
| C. | chmod –f –r +x /home/user1/direct |
| D. | chmod –f +x /home/user1/dire ct |
| Answer» B. chmod –r +x /home/user1/direct | |
| 345. |
The permission -rwxr-xr-t represented in octal expression will be |
| A. | 777 |
| B. | 1755 |
| C. | 1754 |
| D. | 2754 |
| Answer» B. 1755 | |
| 346. |
With a umask value of 112, what is the default permission assigned to newly created regular file? |
| A. | —x–x-wx |
| B. | -rw-rw-r– |
| C. | -r-xr-x-r– |
| D. | -rw-rw-r– |
| Answer» D. -rw-rw-r– | |
| 347. |
Which command is used to assign read- write permission to the owner? |
| A. | chmod a+r file |
| B. | chmod o+r file |
| C. | chmod u=rw file |
| D. | chmod og-r file |
| Answer» C. chmod u=rw file | |
| 348. |
Given the command $ chmod o-w datafile |
| A. | sets write permission to everyone for datafile |
| B. | sets write permission to others for datafile |
| C. | clears write permission to everyone for datafile |
| D. | lears write permission to others for datafile |
| Answer» D. lears write permission to others for datafile | |
| 349. |
Which of these commands will set the permissions on file textfile to read and write for the owner, read for the group, and nothing for everyone else? |
| A. | chmod 046 textfile |
| B. | chmod 640 textfile |
| C. | chmod 310 textfile |
| D. | chmod rw r nil textfile |
| Answer» B. chmod 640 textfile | |
| 350. |
If you are a root user, how can you grand execute permission only for the owner of the file project1? |
| A. | chmod +x project1 |
| B. | chmod u+x project1 |
| C. | chmod a+x project1 |
| D. | chmod u+x project1 |
| Answer» B. chmod u+x project1 | |
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