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Python Institute PCED-30-02 Exam Syllabus Topics:

Section	Objectives
Python Programming Fundamentals	- Basic syntax and data types 1. Variables and operators 2. Control flow basics
Basic Statistics for Data Analysis	- Descriptive statistics 1. Mean, median, mode 2. Variance and standard deviation
Data Handling and Processing with Python	- Working with data structures 1. Iterating and transformations 2. Lists, tuples, dictionaries - Data manipulation libraries 1. NumPy basics 2. Pandas fundamentals
Data Analysis and Visualization	- Data cleaning and preprocessing 1. Missing values handling 2. Data transformation techniques - Data visualization 1. Plot interpretation 2. Matplotlib basics

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Python Institute PCED - Certified Entry-Level Data Analyst with Python Sample Questions (Q24-Q29):

NEW QUESTION # 24
A list is reversed using slicing: lst[::-1]. The programmer wants to confirm whether this modifies the original list or creates a new one. What is the correct behavior?

A. Modifies original
B. Error
C. Returns None
D. Creates new list

Answer: D

Explanation:
Slicing creates a new list object rather than modifying the original. The expression lst[::-1] returns a reversed copy, leaving the original list unchanged.

NEW QUESTION # 25
A Python loop uses range(5, 0, -2) to iterate backward. The programmer expects a decreasing sequence. Which values will actually be generated when this loop runs?

A. 4, 2, 0
B. 5, 4, 3, 2, 1
C. 5, 3
D. 5, 3, 1

Answer: D

Explanation:
The range starts at 5 and decreases by 2 each step until it reaches a value greater than 0. The generated sequence is 5, 3, and 1.

NEW QUESTION # 26
You are given the following list of daily step counts:
steps = [8230, 9020, 7640, 8760, 10020, 2546, 9817]
Your task is to calculate:
- the standard deviation of the step counts,
- the average rounded up to the nearest whole number, and
- the median of the step counts.
Which code snippet correctly performs all three tasks? Select the best answer.
import statistics

A. import math
print(math.stdev(steps))
print(statistics.mean(steps))
print(statistics.median(steps))
import statistics
B. import math
print(statistics.stdev(steps))
print(round(math.mean(steps)))
print(math.median(steps))
import statistics
C. import math
print(statistics.variance(steps))
print(math.ceil(sum(steps) / len(steps)))
print(math.floor(statistics.median(steps)))
import statistics
D. import math
print(statistics.stdev(steps))
print(math.ceil(statistics.mean(steps)))
print(statistics.median(steps))

Answer: D

Explanation:
It uses statistics.stdev() to compute the standard deviation, statistics.mean() to compute the average and math.ceil() to round it up to the nearest whole number, and statistics.median() to compute the median.

NEW QUESTION # 27
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 chart should be in 3D format to show depth and highlight differences more clearly.
B. The graph doesn't explain what each stress level means or show exact values for each month, which limits interpretation.
C. The font used in the chart is hard to read; using larger, uppercase text would improve clarity.
D. The months should be replaced with week numbers to provide more detailed insight.
E. The lines are too light and similar in color, making it difficult to distinguish between trends.

Answer: E

Explanation:
The lines are very light and visually similar, making it difficult to clearly distinguish between the different stress level trends, which directly reduces the effectiveness of the visualization in communicating patterns over time.

NEW QUESTION # 28
Given the following string:
text = "Report2024Final"
Which of the following statements are entirely correct? (Choose two.)

A. text.capitalize()changes Finalto lowercase, and text.find ("L")returns True
B. text.isalpha()returns True, and text.find ("2024")returns True
C. text[6:8].isdigit()returns True, and text.endswith("Final")returns True
D. text[-6].isdigit() returns True, text.startswith("r") returns True
E. text[0:6].isalpha() returns True, and text.find("2024") returns 6
F. text.capitalize()changes Report2024Finalto REPORT2024FINAL, and text.find("2024")returns 6

Answer: A,C,E

Explanation:
The slice text[6:8] is "20", which contains only digits, and the string ends with "Final". The first six characters are "Report", which are all alphabetic, and "2024" begins at index 6.

NEW QUESTION # 29
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