[2026] Python Institute Certified Associate Data Analyst with Python (PCAD-31-02)

문제1

What object-oriented principle allows a child class to reuse and extend the behavior of a parent class in a Python data modeling scenario?

A. Inheritance

B. Encapsulation

C. Abstraction

D. Composition

정답: A

문제2

Which method in the pandas library allows efficient loading of large datasets in chunks to conserve memory?

A. load_dataset()

B. read_csv(chunksize=...)

C. import_csv()

D. fetch_chunks()

정답: B

문제3

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

정답: B

문제4

How would you extract the last three rows of a DataFrame df using position-based indexing?

A. df.iloc[-3:]

B. df[-3]

C. df.tail(3)

D. df.loc[-3:]

정답: A

문제5

Which practices are considered part of professional Python scripting standards?
(Choose two)

A. Avoiding use of modules and libraries

B. Using consistent indentation and naming conventions

C. Including in-line comments and docstrings

D. Avoiding error handling to keep code clean

정답: B,C

문제6

What is the primary difference between the == operator and the is operator in Python when used in a data pipeline?

A. is checks value equality, while == checks for data type compatibility

B. is compares dictionary keys, while == compares keys and values

C. == checks identity, while is compares memory addresses

D. == compares values for equality, while is checks for object identity

정답: D

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