MCQOPTIONS
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MCQOPTIONS
This section includes 746 Mcqs, each offering curated multiple-choice questions to sharpen your Technical Programming knowledge and support exam preparation. Choose a topic below to get started.
| 551. |
Which of the following file set in the current directory are identified by the regular expression a?b* |
| A. | afcc, aabb |
| B. | aabb, axbc |
| C. | abbb, abxy |
| D. | abcd, axbb |
| Answer» C. abbb, abxy | |
| 552. |
Specifies |
| A. | one or more character |
| B. | zero or more charecter |
| C. | one character |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 553. |
* Specifies |
| A. | one or more character |
| B. | zero or more charecter |
| C. | nothing |
| D. | none of the mentioned |
| Answer» C. nothing | |
| 554. |
Which command can be used to test various file attributes |
| A. | if |
| B. | file |
| C. | test |
| D. | type |
| Answer» D. type | |
| 555. |
Which variable contains last background job process id |
| A. | $* |
| B. | $? |
| C. | $$ |
| D. | $! |
| Answer» E. | |
| 556. |
Which variable is used to display number of arguments specified in command line |
| A. | $0 |
| B. | $# |
| C. | $* |
| D. | $? |
| Answer» C. $* | |
| 557. |
The $ variables in a shell script context designates |
| A. | The runtime of the script |
| B. | Number of command line arguments |
| C. | PID of the shell running the script |
| D. | The exit status of the shell script |
| Answer» D. The exit status of the shell script | |
| 558. |
Executing cat /etc/password > /dev/sda as superuser will |
| A. | Write data into a regular file called /dev/sda |
| B. | Write data to the physical device sda |
| C. | Create a temporary file /dev/sda and write data to it |
| D. | None of the mentioned |
| Answer» C. Create a temporary file /dev/sda and write data to it | |
| 559. |
cat < file1 >> file2 | file3 |
| A. | file1 content will be appended to file2 and finally stored in file3 |
| B. | file1 content will be appended to file2 and file3 will be ignored |
| C. | file2 and file3 will have same content |
| D. | syntax error |
| Answer» E. | |
| 560. |
Syntax to suppress the display of command error to monitor? |
| A. | command > &2 |
| B. | command 2> &1 |
| C. | command 2> &2 |
| D. | command 2> /dev/null |
| Answer» E. | |
| 561. |
Which of these is the correct method for appending “foo” in /tmp/bar file? |
| A. | echo foo > /tmp/bar |
| B. | echo foo >> /tmp/bar |
| C. | echo foo | /tmp/var |
| D. | /tmp/bar < echo foo |
| Answer» C. echo foo | /tmp/var | |
| 562. |
cmd > abc 2>&1 will |
| A. | Write file2 to file1 |
| B. | Write standard output and standard error to abc |
| C. | Write standard error to abc |
| D. | Write standard output to abc & standard error to monitor |
| Answer» C. Write standard error to abc | |
| 563. |
cmd 2>&1 > abc will |
| A. | Write file2 to file1 |
| B. | Write standard output and standard error to abc |
| C. | Write standard error to abc |
| D. | Write standard output to abc & standard error to monitor |
| Answer» E. | |
| 564. |
The redirection 2> abc implies |
| A. | Write file 2 to file abc |
| B. | Write standard output to abc |
| C. | Write standard error to abc |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 565. |
Which of the following files will not be displayed by the command cat re* ? |
| A. | reminder |
| B. | receipt |
| C. | Receipt |
| D. | recipe-cake |
| Answer» D. recipe-cake | |
| 566. |
BASH shell stands for? |
| A. | Bourne-again Shell |
| B. | Basic Access Shell |
| C. | Basic to Advanced Shell |
| D. | Big & Advanced Shell |
| Answer» B. Basic Access Shell | |
| 567. |
The user bhojas logged in and performed the following sequence of command. What will be the output of the last command? $ cd project/module1 $ pwd |
| A. | /home/bhojas/project/module1 |
| B. | /home/project/module1 |
| C. | /usr/bhojas/project/module1 |
| D. | project/module1 |
| Answer» B. /home/project/module1 | |
| 568. |
Which of the following represents an absolute path? |
| A. | ../home/file.txt |
| B. | bin/cat |
| C. | cs2204/ |
| D. | /usr/bin/cat |
| Answer» E. | |
| 569. |
What is a shell in UNIX? |
| A. | a program through which users can issue commands to UNIX |
| B. | a window management system |
| C. | the login screen |
| D. | the thing that rides on the back of a turtle in UNIX |
| Answer» B. a window management system | |
| 570. |
Which is true with regards to the shell prompt |
| A. | It can be accidentally erased with backspace |
| B. | The prompt cannot be modified |
| C. | The prompt can be customized (modified) |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 571. |
If a file with execute permissions set, but with unknown file format is executed |
| A. | The file is passed to /bin/sh |
| B. | The system returns an error |
| C. | The current shell will try to execute it |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 572. |
Shell is ? |
| A. | Command Interpreter |
| B. | Interface between Kernel and Hardware |
| C. | Interface between user and applications |
| D. | Command Compiler |
| Answer» B. Interface between Kernel and Hardware | |
| 573. |
Hidden files are |
| A. | Those whose ‘read’ bit is set to ‘h’ |
| B. | Permitted for (can be accessed) only superusers |
| C. | Files that begin with a ‘.’ |
| D. | Files that cannot be opened by ordinary user for writing |
| Answer» D. Files that cannot be opened by ordinary user for writing | |
| 574. |
For every successful login, which script will be executed? |
| A. | /etc/inittab |
| B. | /etc/profile |
| C. | /etc/login |
| D. | /etc/init |
| Answer» C. /etc/login | |
| 575. |
Which command is used to debug a shell script program |
| A. | set |
| B. | set -x |
| C. | debug |
| D. | db |
| Answer» C. debug | |
| 576. |
Which variable contains current shell process id |
| A. | $* |
| B. | $? |
| C. | $$ |
| D. | $! |
| Answer» D. $! | |
| 577. |
While executing a command, the shell |
| A. | Executes it in the same process (as shell) |
| B. | Creates a child shell to execute it |
| C. | Loads a special program to take care of the execution |
| D. | None of the mentioned |
| Answer» C. Loads a special program to take care of the execution | |
| 578. |
Which of the following commands allows definition and assignment of environment variables under bash |
| A. | env |
| B. | export |
| C. | environ |
| D. | setenviron |
| Answer» B. export | |
| 579. |
To feed standard output of one command to standard input of another in a single shell session |
| A. | IO redirection can be used |
| B. | Named pipes can be used |
| C. | The pipe operator provided by the shell can be used |
| D. | It can not be done |
| Answer» D. It can not be done | |
| 580. |
The statement z = ‘expr 5 / 2’ would store which of the following values in z? |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 2.5 |
| Answer» D. 2.5 | |
| 581. |
The expression expr -9 % 2 evaluates to: |
| A. | 0 |
| B. | 1 |
| C. | -1 |
| D. | 2 |
| Answer» D. 2 | |
| 582. |
which of these is NOT a valid variable in bash |
| A. | __ (double underscore) |
| B. | _1var (underscore 1 var ) |
| C. | _var_ (underscore var underscore) |
| D. | some-var (some hyphen var) |
| Answer» E. | |
| 583. |
Create a new file “new.txt” that is a concatenation of “file1.txt” and “file2.txt” |
| A. | cp file.txt file2.txt new.txt |
| B. | cat file1.txt file2.txt > new.txt |
| C. | mv file[12].txt new.txt |
| D. | ls file1.txt file2.txt | new.txt |
| Answer» C. mv file[12].txt new.txt | |
| 584. |
How do you print the lines between 5 and 10, both inclusive |
| A. | cat filename | head | tail -6 |
| B. | cat filename | head | tail -5 |
| C. | cat filename | tail +5 | head |
| D. | cat filename | tail -5 | head -10 |
| Answer» B. cat filename | head | tail -5 | |
| 585. |
Which of the following files need to be referred for user’s secondary group? |
| A. | /etc/passwd |
| B. | /etc/shadow |
| C. | /etc/group |
| D. | /etc/profile |
| Answer» D. /etc/profile | |
| 586. |
By default, a Linux user falls under which group? |
| A. | staff |
| B. | others |
| C. | same as userid (UPG) |
| D. | system |
| Answer» D. system | |
| 587. |
What does the following command do ? who | wc –l |
| A. | List the number of users logged in |
| B. | List the users |
| C. | List the number of users in the system |
| D. | Display the content of who command |
| Answer» B. List the users | |
| 588. |
Which of the following command can be used to change the user password? |
| A. | user can’t change the password |
| B. | passwd |
| C. | passd |
| D. | pwd |
| Answer» C. passd | |
| 589. |
The login shell is |
| A. | The shell program that runs when the user logs in |
| B. | The shell program that authenticates the user while logging in |
| C. | Common shell for all the users that belong to the same group |
| D. | None of the mentioned |
| Answer» B. The shell program that authenticates the user while logging in | |
| 590. |
User id 0 is |
| A. | An innvalid user id |
| B. | The id of the root user |
| C. | The id of a user when the user’s account is deleted |
| D. | None of the mentioned |
| Answer» C. The id of a user when the user’s account is deleted | |
| 591. |
The /etc/passwd file doesn’t contain |
| A. | userid |
| B. | home directory for a user |
| C. | login shell name |
| D. | none of the mentioned |
| Answer» E. | |
| 592. |
Which of the following identifiers associated with a process decide its privilege level |
| A. | uid |
| B. | suid |
| C. | euid |
| D. | gid |
| Answer» D. gid | |
| 593. |
A user can change the default log-in shell using |
| A. | chmod |
| B. | chsh |
| C. | rmsh |
| D. | tchsh |
| Answer» C. rmsh | |
| 594. |
The encrypted password of a user is stored in |
| A. | /etc/shadow |
| B. | /etc/enpasswwd |
| C. | /etc/.passwd |
| D. | /etc/passwd |
| Answer» B. /etc/enpasswwd | |
| 595. |
User’s Primary Group id is listed in which file, at the time of creation of the user (On a standard Unix system) |
| A. | /etc/passwd |
| B. | /etc/groups |
| C. | /etc/login |
| D. | /etc/profile |
| Answer» B. /etc/groups | |
| 596. |
nohup is used to |
| A. | automatically hang up the process after logout |
| B. | continue the process after logout |
| C. | create backgroung process |
| D. | manually hang up the process after logout |
| Answer» C. create backgroung process | |
| 597. |
we can change the priority of a running process using |
| A. | nice |
| B. | renice |
| C. | priority cannot be changed for a running process |
| D. | only superuser can change the priority |
| Answer» C. priority cannot be changed for a running process | |
| 598. |
The signal sent to a process when the Ctrl-C key is pressed is |
| A. | KILL |
| B. | TSTP |
| C. | TERM |
| D. | INT |
| Answer» E. | |
| 599. |
When a child process exits before the parent process exits, which of the following is tru |
| A. | the child process becomes defunct |
| B. | the parent process becomes defunct |
| C. | if the parent process does not handle SIGCHLD, the child process becomes a zombie |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 600. |
Which of the following values for STAT column of ps command is not true: |
| A. | status R means running |
| B. | Status S means sleeping |
| C. | Status E means exited |
| D. | Status Z means zombie |
| Answer» D. Status Z means zombie | |