MCQOPTIONS
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MCQOPTIONS
This section includes 15 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. |
readlines is used for ____________ |
| A. | working on data |
| B. | reading files |
| C. | reading lines in files |
| D. | not exist |
| Answer» C. reading lines in files | |
| 2. |
load() is used for _______ |
| A. | reading |
| B. | loading |
| C. | working |
| D. | not exist |
| Answer» B. loading | |
| 3. |
The benefit of the _____ function is that it is the only way to perfectly repressed an R object in an exportable format, without losing precision or any metadata. |
| A. | save() |
| B. | save.image() |
| C. | unserialize() |
| D. | serialize() |
| Answer» E. | |
| 4. |
When you call serialize() on an R object, the output will be ____ coded in hexadecimal format. |
| A. | raw vector |
| B. | character vector |
| C. | integer vector |
| D. | binary vector |
| Answer» B. character vector | |
| 5. |
.RData extension used when we save data using the functions ___________ |
| A. | save() |
| B. | save.image() |
| C. | save and save.image functions |
| D. | serialize() |
| Answer» D. serialize() | |
| 6. |
.rda extension used when saving data with function __________ |
| A. | save() |
| B. | save.image() |
| C. | save and save.image functions |
| D. | serialize() |
| Answer» D. serialize() | |
| 7. |
If you have a lot of objects that you want to save to a file, we use ________ function. |
| A. | save() |
| B. | save.image() |
| C. | serialize() |
| D. | deserialize() |
| Answer» C. serialize() | |
| 8. |
If we want to save individual R objects to a file, we use the _______ function. |
| A. | save() |
| B. | save.image() |
| C. | serialize() |
| D. | deserialize() |
| Answer» B. save.image() | |
| 9. |
We can dump() R objects to a file by passing _____ |
| A. | character vector of their names |
| B. | object name |
| C. | arguments |
| D. | file name |
| Answer» B. object name | |
| 10. |
Multiple objects can be de parsed at once and read back using function _____ |
| A. | source() |
| B. | read() |
| C. | dget() |
| D. | dput() |
| Answer» B. read() | |
| 11. |
Multiple objects can be de parsed at once using the ______ function. |
| A. | dput() |
| B. | write() |
| C. | dump() |
| D. | dget() |
| Answer» B. write() | |
| 12. |
dput() output is in the form of ___________ |
| A. | R code |
| B. | text file code |
| C. | binary code |
| D. | both binary and text |
| Answer» B. text file code | |
| 13. |
Main way to read the data back in (parsing it) using the function. |
| A. | dput() |
| B. | write() |
| C. | read() |
| D. | dget() |
| Answer» E. | |
| 14. |
One way to pass data around is by de parsing the R object with _________ |
| A. | dput() |
| B. | write() |
| C. | read() |
| D. | dget() |
| Answer» B. write() | |
| 15. |
Unlike writing out a table or CSV file, dump() and dput() preserve the ______ so that another user doesn’t have to specify the all over again. |
| A. | metadata |
| B. | backup data |
| C. | attribute data |
| D. | normal data |
| Answer» B. backup data | |