MCQOPTIONS
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MCQOPTIONS
This section includes 6 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. |
_________ is used to convert wide data to long data. |
| A. | melt |
| B. | dcast |
| C. | cast |
| D. | rcast |
| Answer» B. dcast | |
| 2. |
______ specializes in converting data from wide to long format. |
| A. | gcc |
| B. | reshape |
| C. | reshape2 |
| D. | gcc2 |
| Answer» D. gcc2 | |
| 3. |
Which of the following is similar to Moment.js? |
| A. | stringr |
| B. | lubridate |
| C. | ploy |
| D. | forecast |
| Answer» C. ploy | |
| 4. |
Which of the following syntax is used to install forecast package? |
| A. | install.pack( forecast ) |
| B. | install.packages( cast ) |
| C. | install.packages( forecast ) |
| D. | install.pack( forecastcast ) |
| Answer» D. install.pack( forecastcast ) | |
| 5. |
______ splits a data frame and results an array (hence the da). Hopefully you re getting the idea here. |
| A. | apply |
| B. | daply |
| C. | stats |
| D. | plyr |
| Answer» C. stats | |
| 6. |
______ let s you perform SQL queries on your R data frames. |
| A. | sqldf |
| B. | plyr |
| C. | forecast |
| D. | daply |
| Answer» C. forecast | |