R interview questions part 19
R interview questions part 19
Take as many assements as you can to improve your validate your skill rating
Total Questions: 20
1. ___________ function gives an error message if the desired package cannot be loaded.
Correct Answer is : Library
2. A ________________ in R programming language can also contain numeric and alphabets along with special characters like dot and underline.
Correct Answer is : Variable name
3. The current user defined objects like lists, vectors, etc. is referred to as __________ in the R language.
Correct Answer is : Work names
4. Which function helps you perform sorting in R language?
Correct Answer is : Order
5. Which function is used to create a histogram for visualisation in R programming language?
Correct Answer is : Hist
6. Write the syntax to set the path of the current working directory in R environment?
Correct Answer is : Setwd(“dir_path”)
7. What will be the output of runif()?
Correct Answer is : Random number
8. ________ function generates “n” normal random numbers based on the mean and standard deviation arguments passed to the function.
Correct Answer is : rnorm
9. Write a function to extract the first name in the string “Mrs. Jake Luther”?
Correct Answer is : Substr
10. _________ package provides basic functionalities in R environment like arithmetic calculations, input/output.
Correct Answer is : R base
11. Which function basically finds the intersection between two different sets of data?
Correct Answer is : Merge
12. Which function calculates the count of each category of a categorical variable?
Correct Answer is : Table
13. The cumulative frequency distribution of a categorical variable can be checked using the ________ function in R language.
Correct Answer is : Cumsum
14. A programmer builds a _________ to avoid repeating the same task or reduce complexity.
Correct Answer is : Function
15. _______ grammar makes a clear distinction between your data and what gets displayed on the screen or page.
Correct Answer is : ggplot2
16. Point out the wrong statement :
Correct Answer is : plot is used to create a scatterplot matrix (experimental)
17. Which of the following cuts numeric vector into intervals of equal length ?
Correct Answer is : cut_interval
18. Which of the following is a plot to investigate the order in which observations were recorded ?
Correct Answer is : ggorder
19. Point out the wrong statement :
Correct Answer is : theme_color is classic-looking theme, with x and y axis lines and no gridlines
20. ________ is used for translating between qplot and base graphics.
Correct Answer is : translate_qplot_base
