Ultimate Guide to the PCAD-31-02 – Latest Oct 18, 2026 Edition Available Now [Q47-Q66]

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Ultimate Guide to the PCAD-31-02 – Latest Oct 18, 2026 Edition Available Now

2026 Updated Verified Pass PCAD-31-02 Exam – Real Questions and Answers

Python Institute PCAD-31-02 Exam Syllabus Topics:

Section Weight Objectives
Topic 1: SQL and Database Integration 10% – Relational database concepts

  • 1. Tables, keys, relationships and normalization

– SQL querying

  • 1. SELECT, WHERE, JOIN, GROUP BY, aggregate functions
  • 2. Subqueries and filtering

– Python-database connectivity

  • 1. Executing queries and retrieving results
  • 2. Connecting to SQLite, MySQL or PostgreSQL
  • 3. Error handling and best practices
Topic 2: Data Acquisition and Preprocessing 30% – Data preparation with Pandas and NumPy

  • 1. Data structures: Series, DataFrame, ndarray
  • 2. Data reshaping and aggregation
  • 3. Indexing, filtering, sorting and grouping

– Data collection, integration and storage

  • 1. Data integration and merging
  • 2. Data collection methods and sources
  • 3. Data formats and storage systems

– Data cleaning and validation

  • 1. Data standardization and transformation
  • 2. Quality assurance and validation techniques
  • 3. Handling missing, duplicate and invalid values
Topic 3: Data Visualization and Communication 15% – Visualization with Matplotlib and Seaborn

  • 1. Line, bar, scatter, histogram, box plots
  • 2. Heatmaps, pair plots and correlation matrices
  • 3. Customization and styling

– Data storytelling and reporting

  • 1. Written and verbal presentation techniques
  • 2. Structuring insights and conclusions

– Visualization principles and best practices

  • 1. Choosing appropriate chart types
  • 2. Audience-focused presentation
  • 3. Color, layout and clarity
Topic 4: Data Exploration and Statistical Analysis 25% – Descriptive statistics

  • 1. Correlation and covariance analysis
  • 2. Frequency distributions and percentiles
  • 3. Measures of central tendency and dispersion

– Exploratory data analysis

  • 1. Feature selection and dimensionality reduction basics
  • 2. Identifying patterns, trends and outliers

– Inferential statistics

  • 1. Statistical significance and interpretation
  • 2. Hypothesis testing and confidence intervals
  • 3. Probability concepts and distributions
Topic 5: Data Modeling and Machine Learning Basics 20% – Supervised learning fundamentals

  • 1. Regression: linear, multiple, polynomial
  • 2. Classification: logistic regression, k-NN, decision trees
  • 3. Model training, testing and evaluation

– Model performance and optimization

  • 1. Hyperparameter tuning basics
  • 2. Accuracy, precision, recall, F1-score
  • 3. Overfitting, underfitting and generalization

 

NEW QUESTION 47
What is the main purpose of using the bootstrapping technique in inferential statistics?

 
 
 
 

NEW QUESTION 48
Which of the following best describes the purpose of the plt.subplot() function in Matplotlib?

 
 
 
 

NEW QUESTION 49
What may occur if a model is evaluated using the same data it was trained on?

 
 
 
 

NEW QUESTION 50
Which best practices help enhance database security when building Python data analysis pipelines?
(Choose two)

 
 
 
 

NEW QUESTION 51
Which practices are considered part of professional Python scripting standards?
(Choose two)

 
 
 
 

NEW QUESTION 52
Which characteristics are typically associated with supervised learning algorithms?
(Choose two)

 
 
 
 

NEW QUESTION 53
What is the main reason to remove duplicate records before performing analysis?

 
 
 
 

NEW QUESTION 54
What distinguishes structured data from unstructured data in the context of data modeling and storage?

 
 
 
 

NEW QUESTION 55
Which techniques are commonly used to manage type conversion between SQL and Python when importing database values?
(Choose two)

 
 
 
 

NEW QUESTION 56
Which of the following would best validate the uniqueness of a primary key in a Pandas DataFrame?

 
 
 
 

NEW QUESTION 57
Why might using a pie chart to represent category proportions be less effective than a bar chart?

 
 
 
 

NEW QUESTION 58
What is the best approach when comparing SQL NULL values with Python data during conditional checks?

 
 
 
 

NEW QUESTION 59
When working with relational databases in Python, what are key components required to establish and manage database connections?
(Choose all that apply)

 
 
 
 

NEW QUESTION 60
Which of the following improves the readability of a spreadsheet used for collaborative data analysis?

 
 
 
 

NEW QUESTION 61
Which packages are most commonly used together in a data science workflow for data manipulation and visualization?
(Choose two)

 
 
 
 

NEW QUESTION 62
Which file formats are commonly used for hierarchical or nested data structures in data acquisition?
(Choose two)

 
 
 
 

NEW QUESTION 63
What is the primary role of the pandas library in the Python data science ecosystem?

 
 
 
 

NEW QUESTION 64
Which of the following are true characteristics of bootstrapping in statistics?
(Choose two)

 
 
 
 

NEW QUESTION 65
What is the outcome of the following code?
data = [5, 10, 15]
result = [x**2 for x in data if x > 5]
print(result)

 
 
 
 

NEW QUESTION 66
Which operation would most efficiently apply element-wise multiplication to two NumPy arrays of equal size?

 
 
 
 

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Related Links: myportal.utt.edu.tt www.stes.tyc.edu.tw myportal.utt.edu.tt myportal.utt.edu.tt myportal.utt.edu.tt myportal.utt.edu.tt

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