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Test Your Programming Skills with Safcode!
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"
Quiz Start
1. __________ is the first step of data science life cycle.
Data Modeling
Business Understanding
Data Acquisition
Model Deployment
View Answer
2. The lapply() function takes ___________, ____________ and __________ as input.
List, Vector and Data Frame
Data Frame, Array
Array, List, Matrix
None of them
View Answer
3. The __________ function is used to group data frame.
matrix()
summerize()
group_by()
List()
View Answer
4. The lapply() function return ___________ as output.
Vector
Array
List
Data frame
View Answer
5. R is an__________programming language?
GPL
Open Source
None of above
Close Source
View Answer
6. Response variable is represented on _______________
y-axis
both x-axis and y-axis
x-axis
no axis
View Answer
7. What is the memory limit in R?
2TB
4TB
8TB
6TB
View Answer
8. The __________ function is used to sort the values of column in ascending or descending order.
arrange()
manage()
sort()
mutate()
View Answer
9. which function converts list to a vector?
de_list()
none of them
cnvert_list()
unlist()
View Answer
10. Histograms are good to display the _________ of the data.
Mean
Median
Mode
Quartile
View Answer