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Python Institute PCED-30-02 Exam Syllabus Topics:

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

1. You have collected sales data and want to compute the average using the NumPy library.
Which option correctly shows how to install NumPy and use it in your code to perform this task?

A) To install NumPy:
pip install numpy
Then run this code:
import numpy as np
data = numpy.arr([10, 20, 30])
print(numpy.mean(data))
B) To install NumPy:
pip install numpy as np
Then run this code:
import np
data = np.array([10, 20, 30])
print(np.mean(data))
C) To install NumPy:
from pip install numpy
Then run this code:
import numpy as np
data = np.array([10, 20, 30])
print(np.mean(data))

2. A health researcher uses wearable devices to record physical activity and sends a survey to randomly selected participants across age groups.
Why can this approach be effective? Select the best answer.

A) It uses unstructured interviews to validate automated tracking, improving bias detection.
B) It combines automated data collection with representative sampling, reducing the risk of bias.
C) It limits sampling to one demographic, ensuring high-quality data within a specific group.
D) It relies on observational methods, which are more accurate than surveys or sensors.

3. 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) Error
C) False
D) None

4. You are creating a presentation slide to communicate findings about student stress levels across four categories over a six-month period. You include the following line graph in your presentation:

Your goal is to help your audience clearly understand trends in stress levels over time.
What is the highest problem with this visual presentation? Select the best answer.

A) The lines are too light and similar in color, making it difficult to distinguish between trends.
B) The months should be replaced with week numbers to provide more detailed insight.
C) The chart should be in 3D format to show depth and highlight differences more clearly.
D) The graph doesn't explain what each stress level means or show exact values for each month, which limits interpretation.
E) The font used in the chart is hard to read; using larger, uppercase text would improve clarity.

5. A list is defined as [1, 2, 3]. The programmer uses the method .append([4, 5]). What will the resulting list look like after execution?

A) [1,2,3,4,5]
B) Error
C) [4,5,1,2,3]
D) [1,2,3,[4,5]]

Solutions: