MCQOPTIONS
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MCQOPTIONS
This section includes 21 Mcqs, each offering curated multiple-choice questions to sharpen your Unix knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The command is valid. |
| A. | True |
| B. | FalseView Answer |
| Answer» B. FalseView Answer | |
| 2. |
What will the result when we evaluate this statement? |
| A. | output of pwd command along with string pwd= |
| B. | undefined output |
| C. | erroneous |
| D. | directory variable will hold string pwdView Answer |
| Answer» B. undefined output | |
| 3. |
The variable assignment as x = 10 (whitespace on both sides of =) will work if we are not using C shell? |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
C shell uses which command for assigning values to variables? |
| A. | = |
| B. | set |
| C. | unset |
| D. | $ |
| Answer» C. unset | |
| 5. |
readonly command is used to protect a variable from reassignment. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
A variable can be removed using _____ |
| A. | unset |
| B. | readonly |
| C. | del |
| D. | bash |
| Answer» B. readonly | |
| 7. |
Which of the following shell doesn’t support the command substitution using $ recommended by POSIX? |
| A. | Korn |
| B. | bash |
| C. | C |
| D. | bourne |
| Answer» E. | |
| 8. |
POSIX recommends the use of ____ instead of archaic `command ` for command substitution. |
| A. | | |
| B. | # |
| C. | % |
| D. | $ |
| Answer» E. | |
| 9. |
READONLY_COMMAND_IS_USED_TO_PROTECT_A_VARIABLE_FROM_REASSIGNMENT.?$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
The variable assignment as x = 10 (whitespace on both sides of =) will work if we are not using C shell?$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 11. |
C shell uses which command for assigning values to variables?$ |
| A. | = |
| B. | set |
| C. | unset |
| D. | $ |
| Answer» C. unset | |
| 12. |
Command substitution requires the command to use ________ |
| A. | standard input |
| B. | standard output |
| C. | standard error |
| D. | all of the mentioned |
| Answer» B. standard output | |
| 13. |
Which of the following is not a system defined variable? |
| A. | $PATH |
| B. | $HOME |
| C. | $SHELL |
| D. | $cd |
| Answer» D. $cd | |
| 14. |
A variable can be removed using ____? |
| A. | unset |
| B. | readonly |
| C. | del |
| D. | bash |
| Answer» B. readonly | |
| 15. |
Which of the following is a correct initialization of variables to null strings? |
| A. | x= |
| B. | x=’ ‘ |
| C. | x=” “ |
| D. | x=, x=’ ‘, x=” “ |
| Answer» E. | |
| 16. |
Which symbol is used for evaluation of variables? |
| A. | $ |
| B. | & |
| C. | = |
| D. | @ |
| Answer» B. & | |
| 17. |
Which symbol is used for assigning a value to variables? |
| A. | $ |
| B. | & |
| C. | = |
| D. | @ |
| Answer» D. @ | |
| 18. |
Which of the following shell doesn’t support the command substitution using $ recommended by POSIX?$ |
| A. | Korn |
| B. | bash |
| C. | C |
| D. | bourne |
| Answer» E. | |
| 19. |
Command substitution is enabled in single quotes also. |
| A. | True |
| B. | False |
| Answer» C. | |
| 20. |
Which of the following meta-character is used in command substitution? |
| A. | ` |
| B. | ‘ |
| C. | “ |
| D. | > |
| Answer» B. ‚Äö√Ñ√∂‚àö√ë‚àö‚⧠| |
| 21. |
Shell enables one or more arguments to be obtained from the standard output of another command. This feature is called _________ |
| A. | command substitution |
| B. | argument substitution |
| C. | shell substitution |
| D. | korn |
| Answer» B. argument substitution | |