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

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

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

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

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

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

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7. Which one is not a step of Data Preparation process. Feature Selection
Missing Values
None of the Them
Remove Duplicate Entries

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8. The __________ function is used to select data by its column names. fetch()
select()
all of them
retrieve()

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

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10. The lapply() function return ___________ as output. Array
Vector
List
Data frame

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