MCQOPTIONS
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MCQOPTIONS
This section includes 7 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. |
What is the function to set column names for a matrix? |
| A. | names() |
| B. | colnames() |
| C. | col.names() |
| D. | column name cannot be set for a matrix |
| Answer» C. col.names() | |
| 2. |
What is the function used to test objects (returns a logical operator) if they are NaN? |
| A. | as.nan() |
| B. | is.na() |
| C. | as.na() |
| D. | is.nan() |
| Answer» E. | |
| 3. |
What is the function used to test objects (returns a logical operator) if they are NA? |
| A. | is.na() |
| B. | is.nan() |
| C. | as.na() |
| D. | as.nan() |
| Answer» B. is.nan() | |
| 4. |
Matrices can be created by row-binding with the help of the following function. |
| A. | rjoin() |
| B. | rbind() |
| C. | rowbind() |
| D. | rbinding() |
| Answer» C. rowbind() | |
| 5. |
The dimension attribute is itself an integer vector of length _______ |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 6. |
How do you create an integer suppose 5 in R? |
| A. | 5L |
| B. | 5l |
| C. | 5i |
| D. | 5d |
| Answer» B. 5l | |
| 7. |
Which one of the following is not a basic datatype? |
| A. | Numeric |
| B. | Character |
| C. | Data frame |
| D. | Integer |
| Answer» D. Integer | |