R Programming MCQ Questions And Answers - Data Types

This section focuses on "Data Types" in R Programming. These Multiple Choice Questions (MCQ) should be practiced to improve the R Programming skills required for various interviews (campus interviews, walk-in interviews, company interviews), placements, entrance exams and other competitive examinations.

1. What will be output for the following code?

v <- TRUE
print(class(v))

A. logical
B. Numeric
C. Integer
D. Complex

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2. What will be output for the following code?

v <- ""TRUE""
print(class(v))

A. logical
B. Numeric
C. Integer
D. Character

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3. In R programming, the very basic data types are the R-objects called?

A. Lists
B. Matrices
C. Vectors
D. Arrays

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4. Data Frames are created using the?

A. frame() function
B. data.frame() function
C. data() function
D. frame.data() function

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5. Which functions gives the count of levels?

A. level
B. levels
C. nlevels
D. nlevel

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6. Point out the correct statement?

A. Empty vectors can be created with the vector() function
B. A sequence is represented as a vector but can contain objects of different classes
C. "raw” objects are commonly used directly in data analysis
D. The value NaN represents undefined value

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7. What will be the output of the following R code?

> x <- vector(""numeric"", length = 10)
> x

A. 1 0
B. 0 0 0 0 0 0 0 0 0 0
C. 0 1
D. 0 0 1 1 0 1 1 0

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8. What will be output for the following code?

> sqrt(-17)

A. -4.02
B. 4.02
C. 3.67
D. NAN

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9. _______ function returns a vector of the same size as x with the elements arranged in increasing order.

A. sort()
B. orderasc()
C. orderby()
D. sequence()

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10. What will be the output of the following R code?

> m <- matrix(nrow = 2, ncol = 3)
 > dim(m)

A. 3 3
B. 3 2
C. 2 3
D. 2 2

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