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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. What is the function used to read CSV files into R?
readfile()
csv()
read_csv()
read()
View Answer
2. Heavy data ranging from petabytes or exabytes is called ___________.
Huge Data
Large Data
Heavy Data
Big Data
View Answer
3. ___________ returns a character vector of the same length and with the same attributes as x.
grep()
gsub()
paste()
regexp()
View Answer
4. ____________ is the raw collection of records, contents and images.
Matrix
Data
Data frame
Tables
View Answer
5. Response variable is represented on ___________
y-axis
x-axis
both x-axis and y-axis
none of them
View Answer
6. The __________ function is used to group data frame.
group_by()
matrix()
summerize()
List()
View Answer
7. Which function is used to add regression line to the scatter plot.
smooth()
abline()
None of them
abs_line()
View Answer
8. which function converts list to a vector?
de_list()
cnvert_list()
unlist()
none of them
View Answer
9. What is the memory limit in R?
4TB
6TB
8TB
2TB
View Answer
10. When the explanatory variable is categorical, then _____________ graph is used.
None of these
scatter plot
box plot
pie chart
View Answer