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

1. A variable is assigned using chained assignment: a = b = c = 10. The developer then changes b =
5. What will be the value of a after this operation?

A) None
B) 5
C) 10
D) Error

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. 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)

4. Which of the following statements about Python functions are correct? (Choose two.)

A) Positional arguments must be passed in the order defined, while keyword arguments can be passed in any order using their parameter names.
B) If a function does not contain a returnstatement, it returns Noneby default.
C) passexecutes the function body and returns its result.
D) Default parameters must always come before required ones in the parameter list.
E) A function cannot call itself or be passed as an argument to itself.
F) Functions can only return numeric values or strings.

5. 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) 28
C) 49
D) 35

Solutions: