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

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

2. You are given two lists representing daily page views and sign-ups on a website:
views = [120, 130, 128, 700, 115, 123, 119, 680, 122]
signups = [12, 15, 13, 50, 11, 14, 10, 55, 13]
You want to:
- remove outliers (views > 600), and
- calculate correlation between the cleaned lists.
Which code accomplishes this correctly? Select the best answer.

A)

B)

C)

D)

3. How do the analysis and visualization stages of the data lifecycle typically work together?

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

4. A Python script checks membership using "a" in "apple". The developer wants to understand how membership works for strings. What result will this expression produce?

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

5. 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 4
B) 4 and 3
C) 3 and 3.5
D) 3.5 and 3

Solutions: