R Programming Basics MCQ question and answer with solution

1

Which function can be used to determine the names assigned to a list?

A) Names B) Name C) Nam D) Nem

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Answer & Solution

Answer: Option A

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2

The length of a list is . . . . . . . . to the number of components in that list.

A) Double B) Equal C) Triple D) One fourth

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Answer & Solution

Answer: Option B

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3

What will be the output of the following R code?

> x <- 1:3
> names(x)

A) NULL B) 1 C) 2 D) 4.5

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Answer & Solution

Answer: Option A

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4

Find the following type of vector?

a <- c(1,2,5.3,6,-2,4)

A) Numeric B) Character C) Integer D) Logical

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Answer & Solution

Answer: Option A

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5

Point out the correct statement?

A) Using factors with labels is better than using integers because factors are self-describing B) Factors are used to represent categorical data and can be unordered or ordered C) Factors are important in statistical modeling and are treated specially by modelling functions like lm() and glm() D) All of the mentioned

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Answer & Solution

Answer: Option D

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6

Density function gives output as . . . . . . . .

A) Matrix B) Lists C) Vector D) Number

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Answer & Solution

Answer: Option B

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7

Which of the following code snippet will create a vector with NAs in it?

A) x >- c(1, 2, NA, 10, 3) B) x >- cNA(1, 2, NA, 10, 3) C) x >- NA(1, 2, NA, 10, 3) D) x >- NA(1, 5, NA, 10, 8)

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Answer & Solution

Answer: Option A

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8

What is the simplest way of creating the vector?

A) C function B) Create C) Destroy D) Invalid

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Answer & Solution

Answer: Option A

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9

. . . . . . . . provides optional labels with the columns and rows.

A) Disnames B) Dimnames C) Denmes D) Demnesd

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Answer & Solution

Answer: Option B

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10

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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Answer & Solution

Answer: Option A

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R Programming Basics MCQ question and answer with solution | R Programming MCQs