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

1. Consider a Python program that assigns a string value "5" to a variable and then attempts to multiply it by an integer 3. The programmer expects numeric multiplication. What will actually happen when the code is executed?

A) "555"
B) Error
C) 8
D) 15

2. A loop includes a break statement when a condition is met. The programmer wants to understand how break affects loop execution. What happens when break is executed inside the loop?

A) Error
B) Loop ends immediately
C) Skips one iteration
D) Loop restarts

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 retrieves raw inputs from dashboards, while visualization uses that input to clean the data.
C) Analysis summarizes archived data, and visualization transforms it into structured tables for storage.
D) Analysis produces charts and graphs, while visualization interprets the data to detect outliers.

4. 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)

5. 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)

Solutions: