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

1. Which SQL commands can be used to modify the contents of a table's data directly?
(Choose all that apply)

A) INSERT
B) DELETE
C) SELECT
D) UPDATE

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

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

3. Why is it important to use a test dataset separate from the training dataset when evaluating a machine learning model?

A) To reduce the number of iterations during training
B) To ensure the loss function is minimized
C) To evaluate the model's performance on unseen data
D) To optimize the model's training accuracy

4. Which of the following would best validate the uniqueness of a primary key in a Pandas DataFrame?

A) df['id'].isnull().sum()
B) df['id'].fillna()
C) df['id'].duplicated().any()
D) df['id'].nunique()

5. When creating a line chart with Matplotlib, which function is most appropriate to add a text label at a specific data point?

A) plt.legend()
B) plt.title()
C) plt.xlabel()
D) plt.annotate()

Solutions: