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. When the explanatory variable is categorical, then _____________ graph is used. None of these
box plot
scatter plot
pie chart

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

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

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

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5. What is the memory limit in R? 2TB
4TB
6TB
8TB

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

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

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

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

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10. __________ are useful when you want to display proportional makeup of a sample in presentations. Bubble charts
Pie charts
Scatter charts
Bar charts

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