R Programming Basics MCQ question and answer with solution

81.
Factors are created using the . . . . . . . . function.

A. C()

B. Function()

C. Array()

D. Lists()

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82.
First component of the list can be accessed by . . . . . . . .

A. Name of the component

B. List name

C. Function

D. Package

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83.
Which function is used to enter in data at the terminal?

A. Scanned

B. Scnn

C. Scan

D. Sccn

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84.
Which are indexed by either row or column using a specific name or number?

A. Datasets

B. Data frames

C. Data

D. Functions

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85.

What will be the output of the following R code?

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

A.

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

B.

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

C.

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

D.

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

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86.

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

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87.
Which of the following is used for reading tabular data?

A. read.csv

B. dget

C. readLines

D. writeline

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88.
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

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89.
Computation with vectors is achieved using an element-by-element operation for avoiding . . . . . . . .

A. Loops

B. Functions

C. Packages

D. Interfaces

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90.
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

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81.
Factors are created using the . . . . . . . . function.

Answer & Solution

82.
First component of the list can be accessed by . . . . . . . .

Answer & Solution

83.
Which function is used to enter in data at the terminal?

Answer & Solution

84.
Which are indexed by either row or column using a specific name or number?

Answer & Solution

85.
What will be the output of the following R code?

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

Answer & Solution

86.
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`

Answer & Solution

87.
Which of the following is used for reading tabular data?

Answer & Solution

88.
Point out the correct statement?

Answer & Solution

89.
Computation with vectors is achieved using an element-by-element operation for avoiding . . . . . . . .

Answer & Solution

90.
A data frame is a special type of list where every element of the list has . . . . . . . . length.

Answer & Solution

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

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

Answer & Solution

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

Answer & Solution

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

Answer & Solution

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

Answer & Solution

85. What will be the output of the following R code? > x <- list(1, "a", TRUE, 1 + 4i) > x

Answer & Solution

86. 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

Answer & Solution

87. Which of the following is used for reading tabular data?

Answer & Solution

88. Point out the correct statement?

Answer & Solution

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

Answer & Solution

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

Answer & Solution

Read More Section(R Programming Basics)

81.
Factors are created using the . . . . . . . . function.

82.
First component of the list can be accessed by . . . . . . . .

83.
Which function is used to enter in data at the terminal?

84.
Which are indexed by either row or column using a specific name or number?

85.
What will be the output of the following R code?

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

86.
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`

87.
Which of the following is used for reading tabular data?

88.
Point out the correct statement?

89.
Computation with vectors is achieved using an element-by-element operation for avoiding . . . . . . . .

90.
A data frame is a special type of list where every element of the list has . . . . . . . . length.