Test Your Programming Skills with Safcode!

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Here is all important interview / exams questions.
Student doing practice apptitude test on safcode platform.
Instruction: "Total Number of Questions: 20
Each question carry 10 mark , no negative marking"

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Quiz Start

1. R is an__________programming language? Close Source
None of above
GPL
Open Source

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2. Which function is used to add labels to the graph in the ggplot() function. labs()
lab()
label()
All of them

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3. The lapply() function return ___________ as output. Data frame
Array
Vector
List

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4. Which one is not a step of Data Preparation process. Feature Selection
Remove Duplicate Entries
Missing Values
None of the Them

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5. The lapply() function takes ___________, ____________ and __________ as input. List, Vector and Data Frame
None of them
Array, List, Matrix
Data Frame, Array

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6. The __________ function is used to select data by its column names. all of them
retrieve()
select()
fetch()

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7. The vertical dashed lines in the boxplot are known as ______________. Notches
Tails
Whiskers
Outliers

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8. How to installed packages in R? require(packagename)
install(packagename)
Install.packages(packagenames)
Library(packagename)

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9. The layers in ggplot2 are called ___________. adds on
levels
geoms
sheets

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10. _____________ is an open source R package that provides an elegant and powerful Web framework for building Web applications. Leaflet
Ggplot2
Dash
Shiny

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