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

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

2. 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) 3.5 and 3
B) 3 and 3.5
C) 3 and 4
D) 4 and 3

3. Below are six possible summaries for your presentation:
- Summary 1: "The data revealed a moderate positive correlation between age and recycling frequency. While 72% of students reported recycling paper regularly, only 39% reported recycling plastic."
- Summary 2: "Analysis showed notable differences in recycling habits by material type, with paper being most recycled and plastic least recycled."
- Summary 3: "Older kids recycled more than younger ones. Paper was the most recycled item- plastic got forgotten a lot."
- Summary 4: "Student responses showed positive environmental habits overall, though participation varied by waste type."
- Summary 5: "A lot of students said they recycle. Some didn't answer every question, so we couldn't figure out everything."
- Summary 6: "We asked more than 300 students about recycling. Most said they recycle paper, but way fewer recycle plastic." Which communication style is the best fit for Group A (data scientists) and Group B (12-year- olds), respectively? Select the best answer.

A) Summary 1 for Group A, Summary 6 for Group B
B) Summary 2 for Group A. Summary 6 for Group B
C) Summary 6 for Group A, Summary 3 for Group B
D) Summary 4 for Group A, Summary 3 for Group B
E) Summary 1 for Group A, Summary 3 for Group B
F) Summary 6 for Group A, Summary 5 for Group B

4. A programmer writes a script to test operator precedence using the expression 3 + 4 * 2 ** 2. The goal is to evaluate the result correctly based on Python's operator hierarchy rules. What result should the script produce?

A) 19
B) 49
C) 28
D) 35

5. A dictionary is defined as d = {"a":1, "b":2}. The programmer accesses d["c"]. What happens when this line executes?

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

Solutions: