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? read()
read_csv()
readfile()
csv()

View Answer

2. Which function is used to add regression line to the scatter plot. smooth()
abline()
None of them
abs_line()

View Answer

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

View Answer

4. __________ are useful when you want to display proportional makeup of a sample in presentations. Bubble charts
Pie charts
Bar charts
Scatter charts

View Answer

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

View Answer

6. How to installed packages in R? require(packagename)
install(packagename)
Install.packages(packagenames)
Library(packagename)

View Answer

7. Which function is used to add labels to the graph in the ggplot() function. All of them
labs()
label()
lab()

View Answer

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

View Answer

9. How to visualize data in Pie Chart? piechart
pipe
pie
package

View Answer

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

View Answer