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

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

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

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

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

3. When joining two tables in a relational database using SQL, which clause is used to specify the relationship between their columns?

A) FROM
B) JOIN ON
C) HAVING
D) GROUP BY

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

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

5. Why is it important to adjust data presentations based on the audience's background?

A) To include as many technical terms as possible
B) To avoid using charts altogether
C) To ensure the data is understood and supports actionable insights
D) To simplify all metrics to percentages only

Solutions: