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. __________ is the first step of data science life cycle. Data Modeling
Business Understanding
Data Acquisition
Model Deployment

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

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

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

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5. R is an__________programming language? GPL
Open Source
None of above
Close Source

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

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

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

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

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

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