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Python Institute PCED - Certified Entry-Level Data Analyst with Python Sample Questions:

1. You are writing a function named process_data()to read and process numerical input from a file. The function must:
- read the file data.txt,
- attempt to convert the first line into an integer,
- handle file, conversion, or index-related exceptions,
- print the value only if no error occurs,
- and always print a final message after execution.
Which implementation correctly and robustly meets all these conditions? Select the best answer.

A)

B)

C)

2. An online retailer collects customer reviews, order transaction logs, and product ratings.
Which of the following correctly classifies these types of data? Select the best answer.

A) Product ratings are qualitative and structured; customer reviews are qualitative and unstructured; transaction logs are quantitative and semi-structured.
B) Product ratings are qualitative and unstructured; customer reviews are quantitative and structured; transaction logs are semi-structured and qualitative.
C) Product ratings are quantitative and unstructured; customer reviews are structured and qualitative; transaction logs are quantitative and unstructured.
D) Product ratings are quantitative and structured; customer reviews are qualitative and unstructured; transaction logs are structured and quantitative

3. A data analyst exports a cleaned dataset from Python and wants to share it with a colleague for easy use in Excel.
Which file format is best suited for this purpose? Select the best answer.

A) SQL, because it directly converts tabular data into database tables that Excel can open.
B) CSV, because it stores tabular data in plain text and is compatible with spreadsheet applications.
C) JSON, because it stores hierarchical data and is designed for visual presentation in Excel.
D) XML, because it automatically preserves spreadsheet formatting and charts.

4. You are given a short Python script that uses both arithmetic and assignment operators. The variable x is initialized as 4, then updated using x *= 2 + 3. What will be printed when the final value of x is displayed?

A) 14
B) 20
C) 24
D) 10

5. Which task is traditionally or typically performed by a data analyst, and not by a data scientist or analytics specialist? Select the best answer.

A) Designing a data pipeline to ingest and process real-time sensor data.
B) Developing machine learning algorithms to predict user behavior.
C) Recommending pricing strategies using predictive modeling and A/B testing.
D) Creating summary tables and charts to describe patterns in historical data.

Solutions: