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

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2. The __________ function is used to sort the values of column in ascending or descending order. arrange()
mutate()
manage()
sort()

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3. How are null entries in a data frame denoted in R? n/a
None of these
na
NaN

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4. Response variable is represented on _______________ no axis
y-axis
x-axis
both x-axis and y-axis

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

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6. Heavy data ranging from petabytes or exabytes is called ___________. Large Data
Huge Data
Heavy Data
Big Data

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7. ___________ is a concepts of one to many. Inheritance
Abstraction
Encapsulation
Polymorphism

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

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9. Response variable is represented on ___________ y-axis
both x-axis and y-axis
x-axis
none of them

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10. The function that is used to extract or replace substrings in a character vector in ____________ sub_string()
subchar()
substr()
string()

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