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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"
Quiz Start
1. Histograms are good to display the _________ of the data.
Mean
Quartile
Mode
Median
View Answer
2. Points more than 1.5 times the inter quartile range above the third quartile is the point of ___________.
75th percentile
50th percentile
100th percentile
25th percentile
View Answer
3. The __________ function is used to group data frame.
List()
group_by()
matrix()
summerize()
View Answer
4. The lapply() function return ___________ as output.
Data frame
List
Vector
Array
View Answer
5. __________ is the first step of data science life cycle.
Model Deployment
Business Understanding
Data Acquisition
Data Modeling
View Answer
6. Which function is used to add labels to the graph in the ggplot() function.
labs()
label()
All of them
lab()
View Answer
7. The __________ function is used to select data by its column names.
all of them
select()
fetch()
retrieve()
View Answer
8. ____________ is the raw collection of records, contents and images.
Matrix
Data frame
Tables
Data
View Answer
9. which function converts list to a vector?
cnvert_list()
none of them
unlist()
de_list()
View Answer
10. The estimate of any population is called ___________
Sampling
Guess
Statistics
Subset
View Answer