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.
| 501. |
The ‘mapfile’ command |
| A. | reads lines of standard input and assigns each to the element of an indexed array |
| B. | reads lines of standard output file |
| C. | reads lines of standard error file |
| D. | none of the mentioned |
| Answer» B. reads lines of standard output file | |
| 502. |
The command ‘umask -S’ |
| A. | prints the current mask using symbolic notation |
| B. | prints the current mask using octal numbers |
| C. | sets the mask to 000 |
| D. | sets the mask to 777 |
| Answer» B. prints the current mask using octal numbers | |
| 503. |
The ‘logout’ built in command is used to |
| A. | shutdown the computer |
| B. | logoff of the computer |
| C. | logout the current user |
| D. | to exit the current shell |
| Answer» E. | |
| 504. |
The command ‘hash’ |
| A. | manages a internal hash table |
| B. | find and remember the full path name of the specified command |
| C. | displays used command names and the number of hits |
| D. | all of the mentioned |
| Answer» E. | |
| 505. |
Which command concatenate the specified argument into a single command, then execute the command? |
| A. | fc |
| B. | eval |
| C. | exec |
| D. | getopts |
| Answer» C. exec | |
| 506. |
Which command can create environment variable? |
| A. | export |
| B. | set |
| C. | read |
| D. | none of the mentioned |
| Answer» B. set | |
| 507. |
The command ‘enable -n ‘ |
| A. | enables the specified built-in command |
| B. | disables the specified built-in command |
| C. | print the status of the command |
| D. | none of the mentioned |
| Answer» C. print the status of the command | |
| 508. |
The command ‘disown -r’ |
| A. | removes all jobs |
| B. | removes all running jobs |
| C. | marks jobs to not receive SIGHUP when bash exits |
| D. | marks all jobs |
| Answer» C. marks jobs to not receive SIGHUP when bash exits | |
| 509. |
Which command prints the directory stack? |
| A. | cd |
| B. | dirs |
| C. | popd |
| D. | pushd |
| Answer» C. popd | |
| 510. |
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 | |
| 511. |
The command ‘compgen -c’ shows |
| A. | all variable names |
| B. | all system wide aliases |
| C. | full list of all commands |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 512. |
What is the function of bind command in bash shell? |
| A. | defining new macros |
| B. | defining new key bindings for existing commands |
| C. | dumping the installed key bindings |
| D. | all of the mentioned |
| Answer» E. | |
| 513. |
Which command sets up shorthand for command or command line? |
| A. | set |
| B. | alias |
| C. | new |
| D. | echo |
| Answer» C. new | |
| 514. |
Which command terminates a running process by name of the process? |
| A. | kill |
| B. | pkill |
| C. | killall |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 515. |
‘stty tostop’ command will |
| A. | stop all jobs running in the shell |
| B. | stop background jobs if they try to send output to the terminal |
| C. | this is not a valid command |
| D. | none of the mentioned |
| Answer» C. this is not a valid command | |
| 516. |
‘kill %s’ command will |
| A. | terminate the job whose command line starts with s |
| B. | terminate the last job |
| C. | terminate the first job |
| D. | none of the mentioned |
| Answer» B. terminate the last job | |
| 517. |
Which command brings a background job into the foreground? |
| A. | fg |
| B. | bg |
| C. | jobs %1 |
| D. | none of the mentioned |
| Answer» B. bg | |
| 518. |
Ctrl-Z key combination |
| A. | generates a SIGINT signal |
| B. | stops the process running in the shell |
| C. | kills the process running in the shell |
| D. | generates a SIGINT signal & kills the process running in the shell |
| Answer» C. kills the process running in the shell | |
| 519. |
What is job number? |
| A. | same as PID |
| B. | a unique number, assigned to each job in shell |
| C. | same as PID and a unique number, assigned to each job in shell |
| D. | none of the mentioned |
| Answer» C. same as PID and a unique number, assigned to each job in shell | |
| 520. |
Which command allows to view the current jobs being handled by the shell? |
| A. | jobs |
| B. | view |
| C. | show |
| D. | none of the mentioned |
| Answer» B. view | |
| 521. |
Which one of the following is not correct about job control in bash shell? |
| A. | it is the ability to stop and resume any process running in shell at a later point |
| B. | user employs this facility via an interactive interface supplied by the kernel’s terminal driver and bash |
| C. | it is the ability to create any process |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 522. |
Which command is used to reexecute the previous command? |
| A. | !! |
| B. | !cat |
| C. | !3 |
| D. | !$ |
| Answer» B. !cat | |
| 523. |
fc stands for |
| A. | find command |
| B. | fix command |
| C. | both find & fix command |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 524. |
Which one of the following is bitwise ‘exclusive or’ operator? |
| A. | ^= |
| B. | |= |
| C. | != |
| D. | none of the mentioned |
| Answer» B. |= | |
| 525. |
If a and b are 2 variables then the meaning of a<<=b is |
| A. | b = a << b |
| B. | a = a << b |
| C. | b = b << a |
| D. | a = a << b |
| Answer» C. b = b << a | |
| 526. |
Which expression use the value of the enclosed arithmetic expression? |
| A. | $(()) |
| B. | $() |
| C. | ${} |
| D. | $[]. |
| Answer» B. $() | |
| 527. |
Which built-in command performs integer arithmetic in bash shell? |
| A. | let |
| B. | get |
| C. | set |
| D. | none of the mentioned |
| Answer» B. get | |
| 528. |
To redefine a variable, it can be removed from the list of variables by using the command |
| A. | unset |
| B. | delete |
| C. | remove |
| D. | clear |
| Answer» B. delete | |
| 529. |
Which one of the following is not a valid shell variable? |
| A. | _san |
| B. | san_2 |
| C. | _san_2 |
| D. | 2_san |
| Answer» E. | |
| 530. |
Which one of the following statement is true about variables in shell? |
| A. | variables do not require declaration before assigning value to them |
| B. | variables are case sensitive |
| C. | to extract the contents of a variable, we have to provide the variable a preceding $ |
| D. | all of the mentioned |
| Answer» E. | |
| 531. |
Which command reads user input from the terminal and assign this value to a variable name? |
| A. | read |
| B. | get |
| C. | declare |
| D. | set |
| Answer» B. get | |
| 532. |
In the shell, by default, all variables are considered and stored as |
| A. | string |
| B. | integer |
| C. | character |
| D. | float |
| Answer» B. integer | |
| 533. |
Functions improves the shell’s programmability significantly, because |
| A. | when we invoke a function, it is already in the shell’s memory, therefore a function runs faster than seperate scripts |
| B. | function will not provides a piece of code for repetative tasks |
| C. | all of the mentioned |
| D. | none of the mentioned |
| Answer» B. function will not provides a piece of code for repetative tasks | |
| 534. |
The keyword ‘local’ is used |
| A. | to define a variable within a function for its local scope |
| B. | to redefine any global variable |
| C. | this is not a valid keyword |
| D. | none of the mentioned |
| Answer» B. to redefine any global variable | |
| 535. |
Which of the following command provides the list of the functions defined in the login session? |
| A. | declare -f |
| B. | declare -F |
| C. | both declare -f and -F |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 536. |
Parameters can be passed to a function |
| A. | by using the parameter variables $1, $2, $3……. |
| B. | by using the environment variables |
| C. | by using the parameter & environment variables |
| D. | none of the mentioned |
| Answer» B. by using the environment variables | |
| 537. |
When the return value of any function is not specified within the function, what function returns? |
| A. | nothing |
| B. | exit status of the last command executed |
| C. | 0 |
| D. | none of the mentioned |
| Answer» C. 0 | |
| 538. |
What is the command that can print lines of first file matching with second file? |
| A. | printline |
| B. | cmp |
| C. | com |
| D. | comm |
| Answer» E. | |
| 539. |
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» B. user1 tty 0 1234 | |
| 540. |
How do you remove duplicate lines from the file foo using uniq? |
| A. | sort foo | uniq –u |
| B. | sort -u foo | uniq -d |
| C. | sort foo | uniq –c |
| D. | sort foo | uniq –I |
| Answer» B. sort -u foo | uniq -d | |
| 541. |
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 mentioned |
| Answer» C. grep ‘[a-zA-Z0-9]’ | |
| 542. |
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» C. grep ‘[BOB]’ files | |
| 543. |
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» B. uniq -d | |
| 544. |
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 mentioned |
| Answer» C. The count of lines that ends with the pattern echo in file abc | |
| 545. |
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» D. fileAB, fileBC and fileABC | |
| 546. |
How can you search for blank line in a file? |
| A. | $ grep “ “ file |
| B. | $ grep “^$” file |
| C. | $ grep [“ “] file |
| D. | $ grep [^$] file |
| Answer» C. $ grep [“ “] file | |
| 547. |
Which option of grep displays the line number as well? |
| A. | -v |
| B. | -l |
| C. | -n |
| D. | -E |
| Answer» D. -E | |
| 548. |
Which variable will display the list of the positional parameters? |
| A. | $# |
| B. | $* |
| C. | $? |
| D. | $$ |
| Answer» C. $? | |
| 549. |
What is the output of the following command for bash shell: echo linux $0 |
| A. | linux echo |
| B. | linux linux |
| C. | linux bash |
| D. | linux |
| Answer» D. linux | |
| 550. |
What command would send the output of cmd1 to the input of cmd2? |
| A. | cmd1 | cmd2 |
| B. | cmd1 || cmd2 |
| C. | cmd1 && cmd2 |
| D. | cmd1 ; cmd2 |
| Answer» B. cmd1 || cmd2 | |