MCQOPTIONS
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MCQOPTIONS
This section includes 8 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 function is similar to summarize? |
| A. | arrange_by() |
| B. | group() |
| C. | group_by() |
| D. | arrange |
| Answer» D. arrange | |
| 2. |
dplyr can be integrated with the ________ package for large fast tables. |
| A. | data.table |
| B. | read.table |
| C. | data.data |
| D. | table.read |
| Answer» B. read.table | |
| 3. |
There is an SQL interface for relational databases via the _______ package. |
| A. | DIB |
| B. | DB2 |
| C. | DBI |
| D. | DIB21 |
| Answer» D. DIB21 | |
| 4. |
The ______ operator allows you to string operations in a left-to-right fashion. |
| A. | %>%> |
| B. | %>% |
| C. | >%>% |
| D. | >>>>%%% |
| Answer» C. >%>% | |
| 5. |
The _________ function is used to generate summary statistics from the data frame within strata defined by a variable. |
| A. | groupby() |
| B. | group() |
| C. | group_by() |
| D. | arrange |
| Answer» D. arrange | |
| 6. |
Columns can be arranged in descending order too by using the special ____ operator. |
| A. | asc() |
| B. | desc() |
| C. | descending() |
| D. | subset |
| Answer» C. descending() | |
| 7. |
________ function is similar to the existing subset() function in R but is quite a bit faster. |
| A. | rename |
| B. | filter |
| C. | set |
| D. | subset |
| Answer» C. set | |
| 8. |
The _________ function can be used to select columns of a data frame that you want to focus on. |
| A. | select |
| B. | rename |
| C. | get |
| D. | set |
| Answer» B. rename | |