The mv command changes (A) the inode (B) the inode-number (C) the directory entry (D) both the directory entry and the inode

The mv command changes (A) the inode (B) the inode-number (C) the directory entry (D) both the directory entry and the inode
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Answer :

(C) the directory entry
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A UNIX file system has 1 KB block size and 4-byte disk addresses. What is the maximum file size if the inode contains ten direct block entries, one single indirect block entry, one double indirect block entry and one triple indirect block entry? (A) 30 GB (B) 64 GB (C) 16 GB (D) 1 GB

Description : A UNIX file system has 1 KB block size and 4-byte disk addresses. What is the maximum file size if the inode contains ten direct block entries, one single indirect block entry, one double indirect block entry and one triple indirect block entry? (A) 30 GB (B) 64 GB (C) 16 GB (D) 1 GB

Last Answer : (C) 16 GB

The Unix command: $ vi file1 file2 (A) Edits file1 and stores the contents of file1 in file2 (B) Both files i.e. file1 and file2 can be edited using ‘ex’ command to travel between files (C) Both files can be edited using the ‘mv’ command to move between the files (D) Edits file1 first, saves it and the edits file2

Description : The Unix command: $ vi file1 file2 (A) Edits file1 and stores the contents of file1 in file2 (B) Both files i.e. file1 and file2 can be edited using ex' command to travel between files (C) Both ... using the mv' command to move between the files (D) Edits file1 first, saves it and the edits file2

Last Answer : (B) Both files i.e. file1 and file2 can be edited using ‘ex’ command to travel between files

Which command is used to remove a file? A. remove B. rm C. mv D. del E. None of the above

Description : Which command is used to remove a file? A. remove B. rm C. mv D. del E. None of the above

Last Answer : B. rm

Which command is used to remove a directory? A. rd B. rmdir C. dldir D. rdir E. None of the above

Description : Which command is used to remove a directory? A. rd B. rmdir C. dldir D. rdir E. None of the above

Last Answer : B. rmdir

Which command is used to copy all files having the string chap and any two characters after that to the progs directory? A. cp chap?? progs B. cp chap* progs C. cp chap[12] /progs/*.*

Description : Which command is used to copy all files having the string chap and any two characters after that to the progs directory? A. cp chap?? progs B. cp chap* progs C. cp chap[12] /progs/*.*

Last Answer : A. cp chap?? progs

Suppose d = {“john”:40, “peter”:45}, to delete the entry for “john” what command do we use a) d.delete(“john”:40) b) d.delete(“john”) c) del d[“john”]. d) del d(“john”:40)

Description : Suppose d = {“john”:40, “peter”:45}, to delete the entry for “john” what command do we use a) d.delete(“john”:40) b) d.delete(“john”) c) del d[“john”]. d) del d(“john”:40)

Last Answer : c) del d[“john”].

Which of the following commands is used to display the directory attributes rather than its contents? A. ls -l -d B. ls -l C. ls -x D. ls -F E. None of the above

Description : Which of the following commands is used to display the directory attributes rather than its contents? A. ls -l -d B. ls -l C. ls -x D. ls -F E. None of the above

Last Answer : A. ls -l -d

File management function of the operating system includes i) File creation and deletion ii) Disk scheduling iii) Directory creation iv) Mapping file in secondary storage. A) i, ii and iii only B) i, iii and iv only C) ii, iii and iv only D) All i, ii, iii and iv

Description : File management function of the operating system includes i) File creation and deletion ii) Disk scheduling iii) Directory creation iv) Mapping file in secondary storage. A) i, ii and iii only B) i, iii and iv only C) ii, iii and iv only D) All i, ii, iii and iv

Last Answer : B) i, iii and iv only

Which of the following operations can be performed by using FTP. i) Connect to a remote host ii) Select directory iii) Define the transfer mode iv) List file available A) i, and ii only B) i, ii and iii only C) ii, iii and iv only D) All i, ii, iii and iv

Description : Which of the following operations can be performed by using FTP. i) Connect to a remote host ii) Select directory iii) Define the transfer mode iv) List file available A) i, and ii only B) i, ii and iii only C) ii, iii and iv only D) All i, ii, iii and iv

Last Answer : C) ii, iii and iv only

The directory structure used in Unix file system is called (A) Hierarchical directory (B) Tree structured directory (C) Directed acyclic graph (D) Graph structured directory

Description : The directory structure used in Unix file system is called (A) Hierarchical directory (B) Tree structured directory (C) Directed acyclic graph (D) Graph structured directory

Last Answer : (C) Directed acyclic graph

The directory can be viewed as .................... that translates filenames into their directory entries. (A) Symbol table (B) Partition (C) Swap space (D) Cache

Description : The directory can be viewed as .................... that translates filenames into their directory entries. (A) Symbol table (B) Partition (C) Swap space (D) Cache

Last Answer : (A) Symbol table

A unix file may be of type: (A) Regular file (B) Directory File (C) Device File (D) Any one of the above

Description : A unix file may be of type: (A) Regular file (B) Directory File (C) Device File (D) Any one of the above 

Last Answer : (D) Any one of the above

A particle of mass m is moving along a straight path through the origin of coordinates with a velocity v. The angular momentum of the particle about the origin (a) mv (b) Depends on its distance from origin (c) Is zero (d) Changes from positive to negative as it passes through the origin

Description : A particle of mass m is moving along a straight path through the origin of coordinates with a velocity v. The angular momentum of the particle about the origin (a) mv (b) Depends on its distance from origin (c) Is zero (d) Changes from positive to negative as it passes through the origin

Last Answer : Ans:(c)

Linux command to create nested directories (a directory inside a directory) -Web-Development

Description : Linux command to create nested directories (a directory inside a directory) -Web-Development

Last Answer : answer:

Why did the rmdir command fail's that a directory bar exists. The command rmdir bar fails with the message that the directory is not empty. On running ls bar no files are displayed?

Description : Why did the rmdir command fail's that a directory bar exists. The command rmdir bar fails with the message that the directory is not empty. On running ls bar no files are displayed?

Last Answer : This could mean that the directory named bar has hidden contents. Use ls -a bar to show all contents of bar.

Which command is used to remove the read permission of the file 'note' from both the group and others? A. chmod go+r note B. chmod go+rw note C. chmod go-x note D. chmod go-r, 4-x note E. None of the above

Description : Which command is used to remove the read permission of the file 'note' from both the group and others? A. chmod go+r note B. chmod go+rw note C. chmod go-x note D. chmod go-r, 4-x note E. None of the above

Last Answer : D. chmod go-r, 4-x note

For using a specific database …………… command is used. A) use database B) databasename use C) Both A &B D) None of them

Description : For using a specific database …………… command is used. A) use database B) databasename use C) Both A &B D) None of them

Last Answer : A) use database

Which command is used to count just the number of characters in a file? A. wc - 1 B. wc -c C. wc -w D. wc -r E. None of the above

Description : Which command is used to count just the number of characters in a file? A. wc - 1 B. wc -c C. wc -w D. wc -r E. None of the above

Last Answer : B. wc -c

The Octal number to be given alogn with chmod command to make a file readable, writable and executable to the owner, readable and executable to group and others is: A. 000 B. 755 C. 744 D. 555 E. None of the above

Description : The Octal number to be given alogn with chmod command to make a file readable, writable and executable to the owner, readable and executable to group and others is: A. 000 B. 755 C. 744 D. 555 E. None of the above

Last Answer : B. 755

Suppose d = {“john”:40, “peter”:45}. To obtain the number of entries in dictionary which command do we use? a) d.size() b) len(d) c) size(d) d) d.len()

Description : Suppose d = {“john”:40, “peter”:45}. To obtain the number of entries in dictionary which command do we use? a) d.size() b) len(d) c) size(d) d) d.len()

Last Answer : b) len(d)

What does the following command do? grep −vn “abc” x (A) It will print all of the lines in the file x that match the search string “abc” (B) It will print all of the lines in file x that do not match the search string “abc” (C) It will print total number of lines in the file x that match the search string “abc” (D) It will print the specific line numbers of the file x in which there is a match for string “abc”

Description : What does the following command do? grep −vn abc x (A) It will print all of the lines in the file x that match the search string abc (B) It will print all of the lines in file x that do not ... (D) It will print the specific line numbers of the file x in which there is a match for string abc

Last Answer : (A) It will print all of the lines in the file x that match the search string “abc”

What is the function of following UNIX command? WC – l<a >b& (A) It runs the word count program to count the number of lines in its input, a, writing the result to b, as a foreground process. (B) It runs the word count program to count the number of lines in its input, a, writing the result to b, but does it in the background. (C) It counts the errors during the execution of a process, a, and puts the result in process b. (D) It copies the ‘ l ’ numbers of lines of program from file, a, and stores in file b.

Description : What is the function of following UNIX command? WC - lb& (A) It runs the word count program to count the number of lines in its input, a, writing the result to b, as a foreground process. (B) It runs ... (D) It copies the l ' numbers of lines of program from file, a, and stores in file b.

Last Answer : (B) It runs the word count program to count the number of lines in its input, a, writing the result to b, but does it in the background.

Which command is used to display a file contents in octal form? A. cd B. od C. of D. oct E. None of the above

Description : Which command is used to display a file contents in octal form? A. cd B. od C. of D. oct E. None of the above

Last Answer : B. od

Which symbol is used to separate more than one command in the same command line? A. $ B. # C. : D. ;

Description : Which symbol is used to separate more than one command in the same command line? A. $ B. # C. : D. ;

Last Answer : D. ;

The command which transcribes the standard input to the standard output and also makes a copy of the same in a file is A. tee B. tr C. sort D. grep E. None of the above

Description : The command which transcribes the standard input to the standard output and also makes a copy of the same in a file is A. tee B. tr C. sort D. grep E. None of the above

Last Answer : A. tee

Which command is used to concatenate all files beginning with the string 'emp' and followed by a non-numeric characters? A. cat emp[!0-9] B. more [emp][!0-9] C. cat emp[x-z]

Description : Which command is used to concatenate all files beginning with the string 'emp' and followed by a non-numeric characters? A. cat emp[!0-9] B. more [emp][!0-9] C. cat emp[x-z]

Last Answer : A. cat emp[!0-9]

Which of the following is not a communication command. A. write B. mesg C. mail D. grep E. None of the above

Description : Which of the following is not a communication command. A. write B. mesg C. mail D. grep E. None of the above

Last Answer : D. grep

Which of the following files will displayed by this command cat *ch* A. patch B. catch C. .ch D. All of the above E. None of the above

Description : Which of the following files will displayed by this command cat *ch* A. patch B. catch C. .ch D. All of the above E. None of the above

Last Answer : D. All of the above

Which command sends the word count of the file infile to the newfile. A. wc infile >newfile B. wc <infile >newfile C. wc infile - newfile D. wc infile | newfile E. None of the above

Description : Which command sends the word count of the file infile to the newfile. A. wc infile >newfile B. wc newfile C. wc infile - newfile D. wc infile | newfile E. None of the above

Last Answer : A. wc infile >newfile

Which command is used to extract specific columns from the file? A. cat B. cut C. grep D. paste E. None of the above

Description : Which command is used to extract specific columns from the file? A. cat B. cut C. grep D. paste E. None of the above

Last Answer : B. cut

Which command is used to change protection mode of files starting with the string emp and ending with 1,2, or 3? A. chmod u+x emp[l-3] B. chmod 777 emp* C. chmod u+r ??? emp D. chmod 222 emp? E. None of the above

Description : Which command is used to change protection mode of files starting with the string emp and ending with 1,2, or 3? A. chmod u+x emp[l-3] B. chmod 777 emp* C. chmod u+r ??? emp D. chmod 222 emp? E. None of the above

Last Answer : A. chmod u+x emp[l-3]

Which command is used to display the top of the file? A. cat B. head C. more D. grep E. None of the above

Description : Which command is used to display the top of the file? A. cat B. head C. more D. grep E. None of the above

Last Answer : B. head

Which command is used to sort the lines of data in a file in reverse order A. sort B. sh C. st D. sort -r E. None of the above

Description : Which command is used to sort the lines of data in a file in reverse order A. sort B. sh C. st D. sort -r E. None of the above

Last Answer : D. sort -r

Which symbol will be used with grep command to match the pattern pat at the beginning of a line? A. ^pat B. $pat C. pat$ D. pat^ E. None of the above

Description : Which symbol will be used with grep command to match the pattern pat at the beginning of a line? A. ^pat B. $pat C. pat$ D. pat^ E. None of the above

Last Answer : A. ^pat

The command javac A) Converts a java program into binary code B) Converts a java program into bytecode C) Converts a java program into machine language D) None of the above.

Description : The command javac A) Converts a java program into binary code B) Converts a java program into bytecode C) Converts a java program into machine language D) None of the above.

Last Answer : B) Converts a java program into bytecode

The command javac is used to A) debug a java program B) compile a java program C) interpret a java program D) execute a java program

Description : The command javac is used to A) debug a java program B) compile a java program C) interpret a java program D) execute a java program

Last Answer : B) compile a java program

The type(s) of auto executing macros, in Microsoft word is/are A) Auto execute B) Auto macro C) Command macro D) All of the above

Description : The type(s) of auto executing macros, in Microsoft word is/are A) Auto execute B) Auto macro C) Command macro D) All of the above

Last Answer : D) All of the above

To delete a database ................... command is used A) delete database database_name B) Delete database_name C) drop database database_name D) drop database_name

Description : To delete a database ................... command is used A) delete database database_name B) Delete database_name C) drop database database_name D) drop database_name

Last Answer : C) drop database database_name

To remove string “hello” from list1, we use which command ? a) list1.remove(“hello”) b) list1.remove(hello) c) list1.removeAll(“hello”) d) list1.removeOne(“hello”)

Description : To remove string “hello” from list1, we use which command ? a) list1.remove(“hello”) b) list1.remove(hello) c) list1.removeAll(“hello”) d) list1.removeOne(“hello”)

Last Answer : d) list1.removeOne(“hello”)

To insert 5 to the third position in list1, we use which command ? a) list1.insert(3, 5) b) list1.insert(2, 5) c) list1.add(3, 5) d) list1.append(3, 5)

Description : To insert 5 to the third position in list1, we use which command ? a) list1.insert(3, 5) b) list1.insert(2, 5) c) list1.add(3, 5) d) list1.append(3, 5)

Last Answer : a) list1.insert(3, 5)

To add a new element to a list we use which command ? a) list1.add(5) b) list1.append(5) c) list1.addLast(5) d) list1.addEnd(5)

Description : To add a new element to a list we use which command ? a) list1.add(5) b) list1.append(5) c) list1.addLast(5) d) list1.addEnd(5)

Last Answer : a) list1.add(5)

Which of the following commands would return process_id of sleep command? (A) Sleep 1 and echo $? (B) Sleep 1 and echo $# (C) Sleep 1 and echo $x (D) Sleep 1 and echo $!

Description : Which of the following commands would return process_id of sleep command? (A) Sleep 1 and echo $? (B) Sleep 1 and echo $# (C) Sleep 1 and echo $x (D) Sleep 1 and echo $!

Last Answer : (D) Sleep 1 and echo $!

The output generated by the LINUX command : $ seq 1 2 10 will be (A) 1 2 10 (B) 1 2 3 4 5 6 7 8 9 10 (C) 1 3 5 7 9 (D) 1 5 10

Description : The output generated by the LINUX command : $ seq 1 2 10 will be (A) 1 2 10 (B) 1 2 3 4 5 6 7 8 9 10 (C) 1 3 5 7 9 (D) 1 5 10

Last Answer : (C) 1 3 5 7 9

What will be the output of the following Unix command ? $rm chap0\[1 - 3\] (A) Remove file chap0[1 - 3] (B) Remove file chap01, chap02, chap03 (C) Remove file chap\[1 - 3\] (D) None of the above

Description : What will be the output of the following Unix command ? $rm chap0\[1 - 3\] (A) Remove file chap0[1 - 3] (B) Remove file chap01, chap02, chap03 (C) Remove file chap\[1 - 3\] (D) None of the above

Last Answer : (A) Remove file chap0[1 - 3]

In Unix, the command to enable execution permission for file “mylife” by all is ................ (A) Chmod ugo+X myfile (B) Chmod a+X myfile (C) Chmod +X myfile (D) All of the above

Description : In Unix, the command to enable execution permission for file “mylife” by all is ................ (A) Chmod ugo+X myfile (B) Chmod a+X myfile (C) Chmod +X myfile (D) All of the above

Last Answer : (D) All of the above

Which of the following statement is not correct with reference to cron daemon in UNIX O.S? (A) The cron daemon is the standard tool for running commands on a predetermined schedule. (B) It starts when the system boots and runs as long as the system is up. (C) Cron reads configuration files that contain list of command lines and the times at which they invoked. (D) Crontab for individual users are not stored.

Description : Which of the following statement is not correct with reference to cron daemon in UNIX O.S? (A) The cron daemon is the standard tool for running commands on a predetermined schedule. (B) It starts ... command lines and the times at which they invoked. (D) Crontab for individual users are not stored.

Last Answer : (D) Crontab for individual users are not stored.

Unix command to change the case of first three lines of file “shortlist” from lower to upper (1) $ tr ‘[a-z]’ ‘[A-Z]’ shortlist | head-3 (2) $ head-3 shortlist | tr ‘[a-z]’ ‘[A-Z]’ (3) $ tr head-3 shortlist ‘[A-Z]’ ‘[a-z]’ (4) $ tr shortlist head-3 ‘[a-z]’ ‘[A-Z]’

Description : Unix command to change the case of first three lines of file “shortlist” from lower to upper (1) $ tr ‘[a-z]’ ‘[A-Z]’ shortlist | head-3 (2) $ head-3 shortlist | tr ‘[a-z]’ ‘[A-Z]’ (3) $ tr head-3 shortlist ‘[A-Z]’ ‘[a-z]’ (4) $ tr shortlist head-3 ‘[a-z]’ ‘[A-Z]’

Last Answer : (2) $ head-3 shortlist | tr ‘[a-z]’ ‘[A-Z]’ 

A segment is any object described by GKS commands and data that start with CREATE SEGMENT and Terminates with CLOSE SEGMENT command. What functions can be performed on these segments? (1) Translation and Rotation (2) Panning and Zooming (3) Scaling and Shearing (4) Translation, Rotation, Panning and Zooming

Description : A segment is any object described by GKS commands and data that start with CREATE SEGMENT and Terminates with CLOSE SEGMENT command. What functions can be performed on these segments? (1) Translation ... 2) Panning and Zooming (3) Scaling and Shearing (4) Translation, Rotation, Panning and Zooming

Last Answer : Translation, Rotation, Panning and Zooming

The given maximization assignment problem can be converted into a minimization problem by (A) subtracting each entry in a column from the maximum value in that column. (B) subtracting each entry in the table from the maximum value in that table. (C) adding each entry in a column from the maximum value in that column. (D) adding maximum value of the table to each entry in the table.

Description : The given maximization assignment problem can be converted into a minimization problem by (A) subtracting each entry in a column from the maximum value in that column. (B) subtracting each entry in the table ... value in that column. (D) adding maximum value of the table to each entry in the table.

Last Answer : (B) subtracting each entry in the table from the maximum value in that table.