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

1. Which method is appropriate for combining two DataFrames based on a shared key column where non-matching rows should be excluded from the result?

A) merge(..., how='inner')
B) append()
C) join(..., how='outer')
D) concat()

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

A) Pie charts cannot be created using Seaborn
B) Bar charts are limited to one variable only
C) Pie charts display individual data points more clearly
D) Human perception is less accurate at judging angles than lengths

3. Which of the following exceptions would most likely be raised if a string is directly converted to an integer in Python?

A) ValueError
B) IOError
C) RuntimeError
D) TypeError

4. What is a best practice when organizing data in a spreadsheet for analysis?

A) Place charts in the middle of data tables
B) Use consistent column headers across all sheets
C) Merge cells to reduce redundancy
D) Apply conditional formatting to entire rows only

5. Which of the following are limitations of manual data collection methods?
(Choose two)

A) Increased chance of human error
B) Time-consuming process
C) High scalability
D) Seamless integration with big data tools

Solutions: