Operating System : Unix System MCQ Practice Questions & Answers (Bengali) - ObjectiveMcq

Operating System in Unix System : Practice MCQ Questions & Answers with Explanations

9 practice sets · Page 1 of 1

Unix SystemHardOperating SystemUnix System

Which of the following commands is used to remove files from the user file system, with a confirmation prompt, if they have neither been accessed nor modified in the last one year?

find /user/* (-mtime +365 -a -atime +365) -ok rm {} ;

grep (/usr/*) -mtime +365 | -ok rm

find -mtime +365 | rm

find -name -mtime +365 / -ok rm

View Answer

Correct Answer: A — find /user/* (-mtime +365 -a -atime +365) -ok rm {} ;

Explanation:

The find command with -mtime and -atime flags locates files based on modification and access times, and -ok rm {} \; prompts for confirmation before deleting.

Unix SystemMediumOperating SystemUnix System

Which of the following commands is used to summarize the disk usage?

fdisk

chkdsk

disk

View Answer

Correct Answer: C — du

Explanation:

The du (disk usage) command in UNIX/Linux is used to estimate and summarize file and directory space usage.

Unix SystemMediumOperating SystemUnix System

Which command is used to sort the lines of data in a file in alphabetical order?

sort

sort -r

View Answer

Correct Answer: C — sort

Explanation:

The sort command arranges the lines of text in alphabetical or numerical order by default.

Unix SystemMediumOperating SystemUnix System

If a file has read and write permissions for the owner, then the octal representation of the permissions will be

View Answer

Correct Answer: B — 6

Explanation:

In octal permission representation, read is 4 and write is 2, making the combined read and write permission equal to 6.

Unix SystemMediumOperating SystemUnix System

Which command is used to copy a file named 'wb' from the 'programs' directory to the 'misc' directory while retaining its name?

copy a:programs/wb b:misc/wb

tar programs/wb misc/wb

copy programs/wb misc/wb

cp programs/wb misc

View Answer

Correct Answer: D — cp programs/wb misc

Explanation:

The cp command is used in UNIX/Linux to copy files, and specifying the destination directory (misc) copies the file with the same name.

Unix SystemHardOperating SystemUnix System

Which is the earliest and most widely used shell that came with the UNIX system?

C shell

Korn shell

Bourne shell

Smith shell

View Answer

Correct Answer: C — Bourne shell

Explanation:

The Bourne shell (sh) is the original and earliest standard shell developed for the UNIX operating system by Stephen Bourne.

Unix SystemMediumOperating SystemUnix System

What does the seventh field of the /etc/passwd file represent?

home

password

shell

View Answer

Correct Answer: D — shell

Explanation:

The seventh and final field in the /etc/passwd file specifies the default login shell for the user.

Unix SystemHardOperating SystemUnix System

Which command is used to display the end of the file?

bof

head -r

tail

eof

View Answer

Correct Answer: C — tail

Explanation:

The tail command outputs the last part (end) of files by default.

Unix SystemMediumOperating SystemUnix System

Which command is used to create a directory?

mkdir

crdir

View Answer

Correct Answer: B — mkdir

Explanation:

The mkdir (make directory) command is used in UNIX-like systems to create new directories.