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Python Institute Certified Associate Data Analyst with Python (PCAD-31-02) Sample Questions:

1. What is the primary goal of pre-processing data before performing analysis?

A) To ensure the data is clean, consistent, and suitable for modeling
B) To compress datasets for storage efficiency
C) To obscure sensitive information
D) To minimize the number of data points

2. Which Python library is most commonly used to establish a connection to a SQLite database and perform SQL operations?

A) sqlite3
B) pymysql
C) sqlalchemy
D) psycopg2

3. Which characteristics are commonly associated with cloud-based data storage solutions?

A) Requires dedicated local hardware
B) Elastic scalability
C) High availability and redundancy
D) Physical proximity to user machines

4. Which practices contribute to better exception handling in data pipelines involving file I/O and numerical computations?
(Choose two)

A) Suppressing all error output using pass
B) Logging error messages for later inspection during failures
C) Catching all exceptions using a generic except: clause without specifying the error
D) Using specific exception types like FileNotFoundError or ZeroDivisionError

5. Which of the following practices improves clarity when combining visualizations and textual explanations in a report?

A) Avoid summarizing the data verbally
B) Use visualizations alone without titles or captions
C) Include concise textual summaries that highlight the chart's message
D) Repeat all numerical data in both the chart and text

Solutions: