Python Institute PCED - Certified Entry-Level Data Analyst with Python

QUESTION NO: 1
A dictionary is defined as d = {"a":1, "b":2}. The programmer accesses d["c"]. What happens when this line executes?

A. Returns 0 B. Returns None C. Adds key automatically D. Raises KeyError

Correct Answer: D

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QUESTION NO: 2
How do the analysis and visualization stages of the data lifecycle typically work together?

A. Analysis produces charts and graphs, while visualization interprets the data to detect outliers. B. Analysis identifies patterns and insights in processed data, which are then communicated through visualizations for informed decision-making. C. Analysis summarizes archived data, and visualization transforms it into structured tables for storage. D. Analysis retrieves raw inputs from dashboards, while visualization uses that input to clean the data.

Correct Answer: B

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QUESTION NO: 3
You are reading a data.csvfile line by line. To prepare each line for formatting with f-strings, you need to remove extra whitespace and split the values by commas.
Which line should you insert to correctly clean and parse the input?

A. fields = line.split().strip(', ') B. fields = line.strip().split(', ') C. fields = line.replace(', ', '|').split('|') D. fields = line.split(', ').trim()

Correct Answer: B

QUESTION NO: 4
A script defines a variable x = None and checks its truth value using a conditional statement. The developer wants to understand how Python evaluates None in Boolean contexts. What will bool(x) return?

A. Error B. True C. False D. None

Correct Answer: C

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QUESTION NO: 5
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. CSV, because it stores tabular data in plain text and is compatible with spreadsheet applications. B. XML, because it automatically preserves spreadsheet formatting and charts. C. JSON, because it stores hierarchical data and is designed for visual presentation in Excel. D. SQL, because it directly converts tabular data into database tables that Excel can open.

Correct Answer: A

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QUESTION NO: 6
A script attempts to divide two numbers using / and //. The values are 7 and 2. The developer wants to understand the difference between true division and floor division. What are the results respectively?

A. 3 and 3.5 B. 4 and 3 C. 3.5 and 3 D. 3 and 4

Correct Answer: C

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Python Institute PCED - Certified Entry-Level Data Analyst with Python - PCED-30-02 Exam Questions