R Programming Basics MCQ question and answer with solution

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Each section contains 100 MCQs on R Programming Basics .

Factors are created using the . . . . . . . . function.

A) C() B) Function() C) Array() D) Lists()

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

First component of the list can be accessed by . . . . . . . .

A) Name of the component B) List name C) Function D) Package

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Which function is used to enter in data at the terminal?

A) Scanned B) Scnn C) Scan D) Sccn

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

Which are indexed by either row or column using a specific name or number?

A) Datasets B) Data frames C) Data D) Functions

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

What will be the output of the following R code?

> x <- list(1, "a", TRUE, 1 + 4i)
> x

[[1]]
[1] 1
 
[[2]]
[1] "a"
 
[[3]]
[1] TRUE
 
[[4]]
[1] 1+4i

[[1]]
[1] 2
 
[[2]]
[1] "b"
 
[[3]]
[1] TRUE
 
[[4]]
[1] 1+4i

[[1]]
[1] 3
 
[[2]]
[1] "a"
 
[[3]]
[1] TRUE
 
[[4]]
[1] 1+4i

[[1]]
[1] 77
 
[[2]]
[1] "a"
 
[[3]]
[1] False
 
[[4]]
[1] 1+5i

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

What will be the output of the following R code?

> m <- matrix(1:4, nrow = 2, ncol = 2)
> dimnames(m) <- list(c("a", "b"), c("c", "d"))
> m

A) c d
a 1 3
b 2 4 B) c d
a 1 2
b 2 3 C) c d
a 1 3
b 4 2 D) Error

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Which of the following is used for reading tabular data?

A) read.csv B) dget C) readLines D) writeline

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Point out the correct statement?

A) The value NaN represents undefined value B) Number Inf represents infinity in R C) NaN can also be thought of as a missing value D) "raw" objects are commonly used directly in data analysis

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

Computation with vectors is achieved using an element-by-element operation for avoiding . . . . . . . .

A) Loops B) Functions C) Packages D) Interfaces

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

A data frame is a special type of list where every element of the list has . . . . . . . . length.

A) Same B) Different C) May be different D) May be same

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

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