PCED-30-02 Prüfungs - PCED-30-02 Fragenpool

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Python Institute PCED-30-02 Exam Syllabus Topics:

Section	Objectives
Data Analysis and Visualization	- Data visualization 1. Matplotlib basics 2. Plot interpretation - Data cleaning and preprocessing 1. Missing values handling 2. Data transformation techniques
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. Lists, tuples, dictionaries 2. Iterating and transformations - Data manipulation libraries 1. NumPy basics 2. Pandas fundamentals

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Python Institute PCED - Certified Entry-Level Data Analyst with Python PCED-30-02 Prüfungsfragen mit Lösungen (Q36-Q41):

36. Frage
You are reading a data.csvfile line by line. To prepare each line for formatting with f-strings, you need to remove extra whitespace and split the values by commas.
Which line should you insert to correctly clean and parse the input?

A. fields = line.split().strip(', ')
B. fields = line.replace(', ', '|').split('|')
C. fields = line.strip().split(', ')
D. fields = line.split(', ').trim()

Antwort: C

Begründung:
Stripping removes leading and trailing whitespace from the line, and then splitting on the comma- space delimiter correctly separates the values into a list for further formatting.

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

Antwort: A

Begründung:
Combining automated wearable data with a randomly selected survey sample integrates objective measurements with representative participant input, which helps reduce bias and improves the reliability and generalizability of the findings.

38. Frage
A government agency collects citizen data for various public services.
What is the primary reason for emphasizing careful data management throughout the entire data lifecycle in this context? Select the best answer.

A. To streamline the initial capture of citizen details and minimize the administrative burden on both staff and the public.
B. To enable seamless sharing of anonymized citizen information with other governmental bodies for collaborative initiatives.
C. To uphold data quality for effective service delivery, safeguard citizen privacy and prevent misuse, and comply with data protection laws.
D. To guarantee the long-term availability and integrity of crucial citizen datasets for future policy formulation and evaluation.

Antwort: C

Begründung:
Careful data management across the entire lifecycle ensures high data quality for reliable public services, protects sensitive citizen information from misuse, and maintains compliance with legal and regulatory data protection requirements.

39. Frage
You want to safely read the contents of a file named records.txtand store them in a list. Your requirements are:
- The file should be automatically closed after reading,
- The code should check whether the file exists before opening it, and
- It should handle missing file errors gracefully.
Which of the following is the most appropriate way to accomplish this task in Python? Select the best answer.

Antwort: C

Begründung:
It uses a context manager to automatically close the file after reading and wraps the operation in a try-except block to gracefully handle a missing file error, assigning an empty list if the file is not found.

40. Frage
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. 5, 4, 3, 2, 1
B. 5, 3, 1
C. 5, 3
D. 4, 2, 0

Antwort: B

Begründung:
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.

41. Frage
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