MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Data Science knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
mutate function is used for casting as multi dimensional arrays. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Which of the following join is by default used in plyr package? |
| A. | left |
| B. | right |
| C. | full |
| D. | all of the mentioned |
| Answer» B. right | |
| 3. |
Which of the following function is used for casting data frames? |
| A. | dcast |
| B. | ucast |
| C. | rcast |
| D. | all of the mentioned |
| Answer» B. ucast | |
| 4. |
Which of the following transforms can be performed with data value? |
| A. | log2 |
| B. | cos |
| C. | log10 |
| D. | all of the mentioned |
| Answer» E. | |
| 5. |
Which of the following function is used for determining missing values? |
| A. | any |
| B. | all |
| C. | is |
| D. | all of the mentioned |
| Answer» E. | |
| 6. |
Which of the following function is used for quantiles of quantitative values? |
| A. | quantile |
| B. | quantity |
| C. | quantiles |
| D. | all of the mentioned |
| Answer» B. quantity | |
| 7. |
Which of the following function gives information about top level data? |
| A. | head |
| B. | tail |
| C. | summary |
| D. | none of the mentioned |
| Answer» B. tail | |
| 8. |
MUTATE_FUNCTION_IS_USED_FOR_CASTING_AS_MULTI_DIMENSIONAL_ARRAYS.?$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
WHICH_OF_THE_FOLLOWING_JOIN_IS_BY_DEFAULT_USED_IN_PLYR_PACKAGE_??$ |
| A. | left |
| B. | right |
| C. | full |
| D. | all of the Mentioned |
| Answer» B. right | |
| 10. |
Which of the following function is used for casting data frames ? |
| A. | dcast |
| B. | ucast |
| C. | rcast |
| D. | all of the mentioned |
| Answer» B. ucast | |
| 11. |
Each observation forms a column in tidy data. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
Which of the following transforms can be performed with data value ? |
| A. | log2 |
| B. | cos |
| C. | log10 |
| D. | all of the Mentioned |
| Answer» E. | |
| 13. |
Which of the following function is used for determining missing values ? |
| A. | any |
| B. | all |
| C. | is |
| D. | all of the Mentioned |
| Answer» E. | |
| 14. |
Which of the following function is used for quantiles of quantitative values ? |
| A. | quantile |
| B. | quantity |
| C. | quantiles |
| D. | all of the Mentioned |
| Answer» B. quantity | |
| 15. |
Which of the following function gives information about top level data ? |
| A. | head |
| B. | tail |
| C. | summary |
| D. | none of the Mentioned |
| Answer» B. tail | |