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

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

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

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

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

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

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7. How to visualize data in Pie Chart? pipe
package
piechart
pie

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

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

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10. Points more than 1.5 times the inter quartile range above the third quartile is the point of ___________. 25th percentile
100th percentile
50th percentile
75th percentile

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