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

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

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

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4. ____________ is the raw collection of records, contents and images. Matrix
Data
Data frame
Tables

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

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

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7. Which function is used to add regression line to the scatter plot. smooth()
abline()
None of them
abs_line()

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8. which function converts list to a vector? de_list()
cnvert_list()
unlist()
none of them

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

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

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