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. OOP stands for? Object Oriented Programming
Object of Program
Orange Oriented Pixels
Option Object Programming

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

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

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4. _____________ is not a type of operator in R. Relational
Assignment
Mathematical
Logical

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

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6. ___________ returns a character vector of the same length and with the same attributes as x. paste()
regexp()
grep()
gsub()

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7. The __________ function is used to group data frame. List()
matrix()
summerize()
group_by()

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

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9. Histograms are good to display the _________ of the data. Mode
Mean
Quartile
Median

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10. What is the function used to read CSV files into R? read()
read_csv()
readfile()
csv()

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