Infosys Certified Data Science using Python Professional
Practice with real exam-pattern questions for Infosys Certified Data Science using Python Professional. Each question includes a detailed explanation to help you understand the concept, not just memorise the answer. Try 10 questions free — no login required.
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Join Premium10 Infosys Certified Data Science using Python Professional practice questions with answers
Real Lex exam-pattern multiple-choice questions for the Infosys Certified Data Science using Python Professional certification. Each question includes the correct answer. The full question bank is available to Premium members.
- Question 1
The Python function t.ppf() is used to find the:
- ✓
critical z values
Correct - B
critical t value
- C
CI of population mean
- D
Population sample deviation
- ✓
- Question 2
In empirical rule, approximately what % of the data in a bell-shaped distribution lies outside two standard deviations of the mean.
- ✓
0.05
Correct - B
0.95
- C
0.02
- D
0.1
- ✓
- Question 3
In a data frame, there is a column "country". Ramya, an analyst wants to pictorially represent the countries and the number of times they have appeared in the data frame Suggest her an appropriate graphical concept from the options below:
- ✓
Histogram
Correct - B
Scatter Plot
- C
Line Graph
- D
Bar Plot
- ✓
- Question 4
Which of the following statements about Normal quantile plots is/are FALSE?
- ✓
In constructing a Normal quantile plot, each data point is plotted against its corresponding Normal score
Correct - B
The Normal quantile plot is a very useful graphical tool for assessing the adequacy of the Normal model
- C
If the points on a Normal quantile plot lie close to a straight line, the plot indicates that the Normal model is an adequate representation for the data.
- D
Because you will see the usual mound-like appearance of the Normal distribution on a histogram, it is more helpful than the quantile plot for assessing Normality
- ✓
- Question 5
How to increase the precision of a histogram?
- ✓
Increase the number of bins
Correct - B
Apply grid
- C
Hide grid
- D
Add a KDE
- ✓
- Question 6
Which of the following method creates a new array object that looks at the same data?
- ✓
view
Correct - B
copy
- C
paste
- D
All of the above
- ✓
- Question 7
Infosys Nia has which of the following data science capabilities?
- ✓
Machine Learning
Correct - B
Data Analytics
- C
Both A & B
- D
None of the options
- ✓
- Question 8
On what basis is datascience used to verify the "truthfulness" of data?
- ✓
Accuracy
Correct - B
Context
- C
Both A & B
- D
None of the options
- ✓
- Question 9
There exists a table called 'patient_details', in a database 'hospital.db'. 'xyz' is the connection string and 'abc' is the cursor object created to interact with the db. Choose the option that retrieves all of the data from the patient_details table
- ✓
pd.read_sql("Select * from patient_details",abc)
Correct - B
pd.read_sql("Select * from patient_details",xyz)
- C
pd.read_sql("Select * from patient_details", hospital.db, xyz)
- D
pd.read_sql("Select * from patient_details", hospital.db, abc)
- ✓
- Question 10
Company A produces 10% defective products, Company B produces 20% defective products and C produces 5% defective products. If choosing a company is an equally likely event, then find the probability that the product chosen is defective.
- ✓
0.01
Correct - B
0.9
- C
0.12
- D
0.51
- ✓
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