McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Master of Computer Applications (MCA) , Programming Languages .
Chapters
| 1. |
The commonly used UNIX commands like date, Is, cat, etc. are stored in |
| A. | /dev directory |
| B. | /bin and /usr/bin directories |
| C. | /unixdirecotry |
| D. | /tmp directory |
| Answer» B. /bin and /usr/bin directories | |
| 2. |
Which command is used to concatenate all files beginning with the string ‘emp’ and followed by non-numeric characters? |
| A. | catemp{!0-9] |
| B. | more [emp][!0-9] |
| C. | cateemp[x-z] |
| D. | catemp[a-z] |
| Answer» A. catemp{!0-9] | |
| 3. |
Which command will be used to match the pattern agarwal, Aggarwal, Agggarwal and agrawal in the file named empl.1st? |
| A. | grep “[aA]99*[ar][ra]wal” empl.1st |
| B. | grepag* empl.1st |
| C. | cutagrawal empl.1st |
| D. | grepag[ra][ar]wal empl.1st |
| Answer» A. grep “[aA]99*[ar][ra]wal” empl.1st | |
| 4. |
Which command is used to select those lines where the data lies between 7000 and 7999 at the end of the line of file empl.lit. |
| A. | grep “$7…” empl.1st |
| B. | grep “7…^” empl.1st |
| C. | grep “7…$” empl.1st |
| D. | grep ^7… empl.1st |
| Answer» C. grep “7…$” empl.1st | |
| 5. |
Which command is used to select those lines that begin with a 2 in the tre file empl.1st? |
| A. | grep “^2” empl.1st |
| B. | grep “2…” empl.1st |
| C. | grep “7^” empl.1st |
| D. | grep “2^” empl.1st |
| Answer» A. grep “^2” empl.1st | |
| 6. |
Which of the following commands is used to update access and modification times of a file? |
| A. | grep |
| B. | wc |
| C. | touch |
| D. | cat |
| Answer» C. touch | |
| 7. |
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 | |
| 8. |
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. | sort |
| C. | tr |
| D. | grep |
| Answer» C. tr | |
| 9. |
What command is used to count the total number of lines, words, and characters contained in a file? |
| A. | countw |
| B. | wcount |
| C. | wc |
| D. | count p |
| Answer» C. wc | |
| 10. |
What command is used to remove files? |
| A. | dm |
| B. | rm |
| C. | delete |
| D. | erase |
| Answer» B. rm | |
| 11. |
What command is used with vi editor to delete a single character? |
| A. | x |
| B. | y |
| C. | a |
| D. | z |
| Answer» A. x | |
| 12. |
What command is used to save the standard output in a file, as well as display it on the terminal? |
| A. | tee |
| B. | grep |
| C. | cat |
| D. | more |
| Answer» A. tee | |
| 13. |
What command is used to count just the number of lines contained in a file? |
| A. | wc –r |
| B. | wc –w |
| C. | wc –c |
| D. | wc –l |
| Answer» D. wc –l | |
| 14. |
What command is used to sort the lines of data in a file in reverse order? |
| A. | sort –r |
| B. | st |
| C. | sh |
| D. | sort |
| Answer» A. sort –r | |
| 15. |
What shell's wild-card is used to match a single character? |
| A. | [!ijk] |
| B. | [ijk] |
| C. | ? |
| D. | * |
| Answer» C. ? | |
| 16. |
Which of the following command lists the last 10 lines of a file? |
| A. | grep |
| B. | tail |
| C. | head |
| D. | cat |
| Answer» B. tail | |
| 17. |
Which statement resumes the next iteration of a for, while, select, or untill loop? |
| A. | continue |
| B. | break |
| C. | complete |
| D. | command |
| Answer» B. break | |
| 18. |
Which command can create environment variable? |
| A. | export |
| B. | set |
| C. | read |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 19. |
Which of the following is not a major Unix shell? |
| A. | X Shell |
| B. | C Shell |
| C. | Bash Shell |
| D. | Korn Shell |
| Answer» C. Bash Shell | |
| 20. |
Which was the first Unix shell? |
| A. | X Shell |
| B. | C Shell |
| C. | Bash Shell |
| D. | Korn Shell |
| Answer» B. C Shell | |
| 21. |
The purpose of the PATH variable is to |
| A. | Show the current directory |
| B. | Show the directory path of a file |
| C. | Tells the shell what directories to search when a command is entered |
| D. | Both A and C |
| Answer» C. Tells the shell what directories to search when a command is entered | |
| 22. |
What special character is used to designate the users home directory in the C shell? |
| A. | @ |
| B. | ~ |
| C. | & |
| D. | $ |
| Answer» C. & | |
| 23. |
The shell in the Unix system is the |
| A. | Outer layer of a seed |
| B. | User interface with the operating system |
| C. | Provides a prompt |
| D. | Both (b) and (c) |
| Answer» A. Outer layer of a seed | |
| 24. |
The asterisk is a meta-character which in the command "ls *.txt" means |
| A. | Any single character |
| B. | Any combination of one or more characters |
| C. | Any combination of zero or more characters |
| D. | None of the above |
| Answer» A. Any single character | |
| 25. |
Which command runs the shell built-in command ‘command’ with the given argument? |
| A. | builtin |
| B. | caller |
| C. | there is no command present for this purpose |
| D. | none of the mentioned |
| Answer» A. builtin | |
| 26. |
Which option of the command ‘cd’ use the actual filesystem path for cd..and the value of pwd? |
| A. | -l |
| B. | -L |
| C. | -p |
| D. | -P |
| Answer» D. -P | |
| 27. |
Which command generates possible completions for string according to the and write it to standard output? |
| A. | compgen |
| B. | complete |
| C. | continue |
| D. | none of the mentioned |
| Answer» A. compgen | |
| 28. |
Which command executes ‘command’ in place of the current process instead of creating a new process? |
| A. | exec |
| B. | command |
| C. | trap |
| D. | none of the mentioned |
| Answer» A. exec | |
| 29. |
Which of the following is not a iterative construct in "bash"? |
| A. | If |
| B. | For |
| C. | Until |
| D. | While |
| Answer» C. Until | |
| 30. |
Assuming the files fileA, fileB, fileAB, fileBC and fileABC, exist in a directory, which files match with the pattern file[ABC]? |
| A. | fileA, fileB and fileABC |
| B. | fileABC |
| C. | fileA and fileB |
| D. | fileAB, fileBC and fileABC |
| Answer» C. fileA and fileB | |
| 31. |
What will be printed for the command below? $ grep –c “^echo” abc |
| A. | The count of lines that do not contain the pattern echo in file abc |
| B. | The count of lines which begin with the pattern echo in file abc |
| C. | The count of lines that ends with the pattern echo in file abc |
| D. | None of the above |
| Answer» B. The count of lines which begin with the pattern echo in file abc | |
| 32. |
Which one is used to select only one copy of the repeated lines? |
| A. | uniq -u |
| B. | uniq -d |
| C. | uniq -c |
| D. | uniq –I |
| Answer» A. uniq -u | |
| 33. |
Indicate the right option to search for BOB, Bob, BOb or BoB? |
| A. | grep –i Bob files |
| B. | grep ‘B[oO][bB]’ files |
| C. | grep ‘[BOB]’ files |
| D. | grep -v ‘Bob’ files |
| Answer» B. grep ‘B[oO][bB]’ files | |
| 34. |
Indicate the right option to search for anything not a letter or number |
| A. | grep ‘^[a-zA-Z0-9]’ |
| B. | grep ‘[^a-zA-Z0-9]’ |
| C. | grep ‘[a-zA-Z0-9]’ |
| D. | None of the above |
| Answer» B. grep ‘[^a-zA-Z0-9]’ | |
| 35. |
One of the entry of /etc/passwd file is shown below: user1:x:1111:2222:McqMate:/home/user1:/bin/bash Which among the following will print userid and home dir in the following pattern “user1:/home/user1” |
| A. | awk `{print $1 “:” $6}` /etc/passwd |
| B. | awk `{print $1 “:” $7}` /etc/passwd |
| C. | awk `{print $2 “:” $6}` /etc/passwd |
| D. | awk `{print $2 “:” $7}` /etc/passwd |
| Answer» A. awk `{print $1 “:” $6}` /etc/passwd | |
| 36. |
who cut –d ” ” -f1 what is the ouput if the who command displays like this user1 tty 0 1234 |
| A. | user1 |
| B. | user1 tty 0 1234 |
| C. | tty |
| D. | tty 0 1234 |
| Answer» A. user1 | |
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