PCED-30-02認証試験 & PCED-30-02的中問題集

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Python Institute PCED-30-02 Exam Syllabus Topics:

Section	Objectives
Topic 1: Basic Statistics for Data Analysis	- Descriptive statistics 1. Variance and standard deviation 2. Mean, median, mode
Topic 2: Data Analysis and Visualization	- Data visualization 1. Plot interpretation 2. Matplotlib basics - Data cleaning and preprocessing 1. Missing values handling 2. Data transformation techniques
Topic 3: Python Programming Fundamentals	- Basic syntax and data types 1. Control flow basics 2. Variables and operators
Topic 4: Data Handling and Processing with Python	- Working with data structures 1. Lists, tuples, dictionaries 2. Iterating and transformations - Data manipulation libraries 1. Pandas fundamentals 2. NumPy basics

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PCED-30-02的中問題集、PCED-30-02日本語版復習指南

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Python Institute PCED - Certified Entry-Level Data Analyst with Python 認定 PCED-30-02 試験問題 (Q20-Q25):

質問 # 20
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(statistics.stdev(steps))
print(round(math.mean(steps)))
print(math.median(steps))
import statistics
B. import math
print(statistics.variance(steps))
print(math.ceil(sum(steps) / len(steps)))
print(math.floor(statistics.median(steps)))
import statistics
C. import math
print(statistics.stdev(steps))
print(math.ceil(statistics.mean(steps)))
print(statistics.median(steps))
D. import math
print(math.stdev(steps))
print(statistics.mean(steps))
print(statistics.median(steps))
import statistics

正解：C

解説：
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.

質問 # 21
An e-commerce site records every product view and purchase.
Which of the following best describes how these logs become marketing insights?

A. Raw event logs are stored, archived, and indexed - like by user ID and session - which then facilitate audit trails.
B. Raw event logs are filtered, aggregated, and formatted into summaries - like total visits per category - which then provide traffic reports.
C. Raw event logs are structured, analyzed, and interpreted into information - like conversion rates by product - which then builds knowledge of customer preferences.
D. Raw event logs are validated, organized, and compiled into datasets - like timestamped user actions - which then support system debugging.

正解：C

解説：
Marketing insights are produced when raw event logs are structured, analyzed, and interpreted to generate meaningful metrics such as conversion rates. These interpreted results transform data into actionable knowledge about customer behavior and preferences.

質問 # 22
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 guarantee the long-term availability and integrity of crucial citizen datasets for future policy formulation and evaluation.
C. To uphold data quality for effective service delivery, safeguard citizen privacy and prevent misuse, and comply with data protection laws.
D. To enable seamless sharing of anonymized citizen information with other governmental bodies for collaborative initiatives.

正解：C

解説：
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.

質問 # 23
A financial technology company is reviewing its data practices to ensure legal and ethical compliance.
Which of the following actions would support responsible data handling and align with regulations like GDPR, HIPAA, and CCPA? (Choose two.)

A. Retaining user data permanently unless users explicitly request deletion.
B. Automatically opting users into data sharing unless they manually change settings.
C. Implementing encryption for both stored and transmitted customer data.
D. Providing users with a clear explanation of how their data is used and obtaining explicit consent.
E. Limiting data access only to marketing staff to streamline personalization.

正解：C、D

解説：
Encrypting stored and transmitted data protects sensitive information from unauthorized access and supports regulatory requirements for data security. Providing clear explanations of data usage and obtaining explicit consent ensures transparency and aligns with core principles of data protection regulations such as lawful processing and user rights.

質問 # 24
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. Error
B. 0
C. 1
D. None

正解：C

解説：
Integers are immutable in Python. Reassigning b to a new value does not affect a or c, which still reference the original integer value 10.

質問 # 25
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PCED-30-02的中問題集: https://www.goshiken.com/Python-Institute/PCED-30-02-mondaishu.html