Free Python Institute PCAD-31-02 Practice Test & Real Exam Questions, Page 4

Exam Code/Number: PCAD-31-02
Exam Name/Title: Python Institute Certified Associate Data Analyst with Python (PCAD-31-02)
Certification Provider: Python Institute
Corresponding Certification: Python Institute Certification

Exam Questions: 146
Updated On: Jul 07, 2026

Page: 4 / 21
Total 146 questions

What is the correct SQL statement to permanently remove a table named customers from a database?

A. DROP TABLE customers;

B. DELETE TABLE customers;

C. TRUNCATE TABLE customers;

D. REMOVE TABLE customers;

Discussion 0

Correct Answer: A Vote an answer

What is the primary reason for converting all categorical labels to lowercase during the data cleaning process?

A. To improve data visualization aesthetics

B. To avoid treating the same category as different due to case differences

C. To make string comparison operations slower

D. To reduce memory usage in the dataset

Discussion 0

Correct Answer: B Vote an answer

Which methods can be used to validate data types and structure in a Pandas DataFrame?
(Choose two)

A. df.info()

B. df.dtypes

C. df.memory_usage()

D. df.to_csv()

Discussion 0

Correct Answer: A,B Vote an answer

Which SQL command should a data analyst use to modify existing records in a database table based on specific conditions?

A. INSERT

B. CREATE

C. UPDATE

D. SELECT

Discussion 0

Correct Answer: C Vote an answer

What is the correct sequence to connect to a database and execute a query using the sqlite3 module in Python?

A. Execute → Connect → Commit → Close

B. Commit → Connect → Execute → Close

C. Connect → Commit → Execute → Close

D. Connect → Execute → Commit → Close

Discussion 0

Correct Answer: D Vote an answer

Why is it important to manage object identity correctly in complex data analysis pipelines?

A. It avoids redundant copies and preserves shared state when required

B. It guarantees consistent hashing of string values

C. It ensures type casting is consistently applied

D. It prevents reloading modules unnecessarily

Discussion 0

Correct Answer: A Vote an answer

Why might using a pie chart to represent category proportions be less effective than a bar chart?

A. Pie charts display individual data points more clearly

B. Bar charts are limited to one variable only

C. Pie charts cannot be created using Seaborn

D. Human perception is less accurate at judging angles than lengths

Discussion 0

Correct Answer: D Vote an answer

Page: 4 / 21
Total 146 questions

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