MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
_______________ returns TRUE then X can be termed as a matrix data object. |
| A. | is.”matrix(X”) |
| B. | is.matrix(X) |
| C. | is.notamatrix(X ) |
| D. | is.matrix(“X”) |
| Answer» C. is.notamatrix(X ) | |
| 2. |
The line of code in R language should begin with a ________________ |
| A. | Hash symbol |
| B. | Alphabet |
| C. | Number |
| D. | Character |
| Answer» B. Alphabet | |
| 3. |
__________ function is used for reading the .csv file in R language. |
| A. | Write.csv() |
| B. | Read.csv () |
| C. | Let.csv() |
| D. | Table.csv() |
| Answer» C. Let.csv() | |
| 4. |
_____________ will produce a sequential vector c( (1,2,3,4,5,6,7,8,9)). |
| A. | Seq(9) |
| B. | Seq(10) |
| C. | Seq(15) |
| D. | Seq(12) |
| Answer» B. Seq(10) | |
| 5. |
Which function is more verbose? |
| A. | Lapply |
| B. | Japply |
| C. | Vapply |
| D. | Zapply |
| Answer» D. Zapply | |
| 6. |
Which function is difficult to implement? |
| A. | Lapply |
| B. | Japply |
| C. | Vapply |
| D. | Zapply |
| Answer» D. Zapply | |
| 7. |
_____________ function is preferred over sapply as vapply allows the programmer to specific the output type. |
| A. | Lapply |
| B. | Japply |
| C. | Vapply |
| D. | Zapply |
| Answer» D. Zapply | |
| 8. |
If a programmer wants the output to be a list then ___________ function is used. |
| A. | Lapply |
| B. | Sapply |
| C. | Vapply |
| D. | Zapply |
| Answer» C. Vapply | |
| 9. |
If the programmers want the output to be a data frame or a vector, then ________ function is used. |
| A. | Lapply |
| B. | Sapply |
| C. | Vapply |
| D. | Zapply |
| Answer» B. Sapply | |
| 10. |
R code can be tested using _________________ package. |
| A. | Dplyr |
| B. | Hadley’s testthat |
| C. | SKLearn |
| D. | KNN |
| Answer» C. SKLearn | |