MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your R Programming knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following object is masked from ‘package: stats’? |
| A. | filter |
| B. | union |
| C. | set difference |
| D. | get difference |
| Answer» B. union | |
| 2. |
The dplyr package can be installed from CRAN using __________ |
| A. | installall.packages(“dplyr”) |
| B. | install.packages(“dplyr”) |
| C. | installed.packages(“dplyr”) |
| D. | installed.packages(“dpl”) |
| Answer» C. installed.packages(“dplyr”) | |
| 3. |
The dplyr package can be installed from GitHub using the _______ package. |
| A. | dev |
| B. | devtools |
| C. | devtool |
| D. | devdel |
| Answer» C. devtool | |
| 4. |
The _______ operator is used to connect multiple verb actions together into a pipeline. |
| A. | pipe |
| B. | piper |
| C. | start |
| D. | end |
| Answer» B. piper | |
| 5. |
________ add new variables/columns or transform existing variables. |
| A. | mutate |
| B. | add |
| C. | apped |
| D. | arrange |
| Answer» B. add | |
| 6. |
_________ generate summary statistics of different variables in the data frame, possibly within strata. |
| A. | rename |
| B. | summarize |
| C. | set |
| D. | subset |
| Answer» C. set | |
| 7. |
THE_DPLYR_PACKAGE_CAN_BE_INSTALLED_FROM_CRAN_USING_:?$ |
| A. | installall.packages(“dplyr”) |
| B. | install.packages(“dplyr”) |
| C. | installed.packages(“dplyr”) |
| D. | none of the mentioned |
| Answer» C. installed.packages(‚Äö√Ñ√∂‚àö√ë‚àö‚à´dplyr‚Äö√Ñ√∂‚àö√ë‚àöœÄ) | |
| 8. |
Which_of_the_following_object_is_masked_from_‘package:_stats’?$# |
| A. | filter |
| B. | union |
| C. | set difference |
| D. | none of the mentioned |
| Answer» B. union | |
| 9. |
The dplyr package can be installed from GitHub using the _______ packag? |
| A. | dev |
| B. | devtools |
| C. | devtool |
| D. | all of the mentioned |
| Answer» C. devtool | |
| 10. |
The _______ operator is used to connect multiple verb actions together into a pipeline |
| A. | pipe |
| B. | piper |
| C. | start |
| D. | all of the mentioned |
| Answer» B. piper | |
| 11. |
________ add new variables/columns or transform existing variables |
| A. | mutate |
| B. | add |
| C. | apped |
| D. | arrange |
| Answer» B. add | |
| 12. |
_________ generate summary statistics of different variables in the data frame, possibly within strata |
| A. | rename |
| B. | summarize |
| C. | set |
| D. | subset |
| Answer» C. set | |
| 13. |
_________ extract a subset of rows from a dataframe based on logical conditions. |
| A. | rename |
| B. | filter |
| C. | set |
| D. | subset |
| Answer» B. filter | |
| 14. |
Which of the following return a subset of the columns of a data frame? |
| A. | select |
| B. | retrieve |
| C. | get |
| D. | all of the mentioned |
| Answer» B. retrieve | |