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EITCA Academy

The European Information Technologies Certification Institute - EITCI ASBL

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EITCI Institute ASBL

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Questions and answers designated by tag: Feature Engineering

What specific vulnerabilities does the bag-of-words model present against adversarial attacks or data manipulation, and what practical countermeasures do you recommend implementing?

Wednesday, 03 December 2025 by JOSE ALFONSIN PENA

The bag-of-words (BoW) model is a foundational technique in natural language processing (NLP) that represents text as an unordered collection of words, disregarding grammar, word order, and, typically, word structure. Each document is converted into a vector based on word occurrence, often using either raw counts or term frequency-inverse document frequency (TF-IDF) values. Despite its

  • Published in Artificial Intelligence, EITC/AI/GCML Google Cloud Machine Learning, Expertise in Machine Learning, Natural language processing - bag of words
Tagged under: Adversarial Attacks, Artificial Intelligence, Bag-of-Words, Data Preprocessing, Feature Engineering, NLP, Security, Text Classification

What are the differences between a linear model and a deep learning model?

Sunday, 30 November 2025 by RAFAEL MARTINEZ

A linear model and a deep learning model represent two distinct paradigms within machine learning, each characterized by their structural complexity, representational capacity, learning mechanisms, and typical use cases. Understanding the differences between these two approaches is foundational for practitioners and researchers who seek to apply machine learning techniques effectively to real-world problems. Linear Model:

  • Published in Artificial Intelligence, EITC/AI/GCML Google Cloud Machine Learning, First steps in Machine Learning, Deep neural networks and estimators
Tagged under: Artificial Intelligence, Deep Learning, Estimator API, Feature Engineering, Google Cloud, Linear Models, Machine Learning, Model Interpretability, Neural Networks, TensorFlow

Is preparing an algorithm for ML difficult?

Saturday, 27 September 2025 by Julia Nurzyńska

The process of preparing an algorithm for machine learning (ML) is a multifaceted endeavor that encompasses several distinct stages, each presenting its own set of challenges. The complexity of this task varies depending on factors such as the nature of the problem, the quality and quantity of available data, the required level of accuracy, and

  • Published in Artificial Intelligence, EITC/AI/GCML Google Cloud Machine Learning, Introduction, What is machine learning
Tagged under: Artificial Intelligence, Data Preparation, Feature Engineering, Google Cloud, Machine Learning, Model Evaluation

What are the main challenges encountered during the data preprocessing step in machine learning, and how can addressing these challenges improve the effectiveness of a model?

Saturday, 26 April 2025 by Mohammed Khaled

The data preprocessing step in machine learning is a critical phase that significantly impacts the performance and effectiveness of a model. It involves transforming raw data into a clean and usable format, ensuring that the machine learning algorithms can process the data effectively. Addressing the challenges encountered during this step can lead to improved model

  • Published in Artificial Intelligence, EITC/AI/GCML Google Cloud Machine Learning, First steps in Machine Learning, Plain and simple estimators
Tagged under: Artificial Intelligence, Data Imbalance, Data Integration, Data Preprocessing, Data Quality, Feature Engineering

How to prepare and clean data before training?

Saturday, 18 January 2025 by Jenni Hopeela

In the field of machine learning, particularly when working with platforms such as Google Cloud Machine Learning, preparing and cleaning data is a critical step that directly impacts the performance and accuracy of the models you develop. This process involves several phases, each designed to ensure that the data used for training is of high

  • Published in Artificial Intelligence, EITC/AI/GCML Google Cloud Machine Learning, Introduction, What is machine learning
Tagged under: Artificial Intelligence, BigQuery, Data Augmentation, Data Cleaning, Data Integration, Data Preparation, Data Preprocessing, Data Transformation, Feature Engineering, Google Cloud, Machine Learning

What are the key differences between traditional machine learning and deep learning, particularly in terms of feature engineering and data representation?

Tuesday, 21 May 2024 by EITCA Academy

The distinction between traditional machine learning (ML) and deep learning (DL) lies fundamentally in their approaches to feature engineering and data representation, among other facets. These differences are pivotal in understanding the evolution of machine learning technologies and their applications. Feature Engineering Traditional Machine Learning: In traditional machine learning, feature engineering is a important step

  • Published in Artificial Intelligence, EITC/AI/ADL Advanced Deep Learning, Introduction, Introduction to advanced machine learning approaches, Examination review
Tagged under: Artificial Intelligence, BERT, CNN, Data Representation, Deep Learning, Feature Engineering, Interpretability, Machine Learning, NLP, RNN, Scalability

How to create learning algorithms based on invisible data?

Saturday, 02 September 2023 by Wojciech Cieslisnki

The process of creating learning algorithms based on invisible data involves several steps and considerations. In order to develop an algorithm for this purpose, it is necessary to understand the nature of invisible data and how it can be utilized in machine learning tasks. Let’s explain the algorithmic approach to creating learning algorithms based on

  • Published in Artificial Intelligence, EITC/AI/GCML Google Cloud Machine Learning, First steps in Machine Learning, Serverless predictions at scale
Tagged under: Algorithm, Artificial Intelligence, Classification, Feature Engineering, Invisible Data, Machine Learning

What are the necessary steps to prepare the data for training an RNN model to predict the future price of Litecoin?

Sunday, 13 August 2023 by EITCA Academy

To prepare the data for training a recurrent neural network (RNN) model to predict the future price of Litecoin, several necessary steps need to be taken. These steps involve data collection, data preprocessing, feature engineering, and data splitting for training and testing purposes. In this answer, we will go through each step in detail to

  • Published in Artificial Intelligence, EITC/AI/DLPTFK Deep Learning with Python, TensorFlow and Keras, Recurrent neural networks, Introduction to Cryptocurrency-predicting RNN, Examination review
Tagged under: Artificial Intelligence, Cryptocurrency Prediction, Data Preprocessing, Data Splitting, Feature Engineering, Recurrent Neural Networks

How can real-world data differ from the datasets used in tutorials?

Tuesday, 08 August 2023 by EITCA Academy

Real-world data can significantly differ from the datasets used in tutorials, particularly in the field of artificial intelligence, specifically deep learning with TensorFlow and 3D convolutional neural networks (CNNs) for lung cancer detection in the Kaggle competition. While tutorials often provide simplified and curated datasets for didactic purposes, real-world data is typically more complex and

  • Published in Artificial Intelligence, EITC/AI/DLTF Deep Learning with TensorFlow, 3D convolutional neural network with Kaggle lung cancer detection competiton, Introduction, Examination review
Tagged under: Artificial Intelligence, Class Imbalance, Data Preprocessing, Ethical Considerations, Feature Engineering, Scale And Diversity

How can non-numerical data be handled in machine learning algorithms?

Monday, 07 August 2023 by EITCA Academy

Handling non-numerical data in machine learning algorithms is a important task in order to extract meaningful insights and make accurate predictions. While many machine learning algorithms are designed to handle numerical data, there are several techniques available to preprocess and transform non-numerical data into a suitable format for analysis. In this answer, we will explore

  • Published in Artificial Intelligence, EITC/AI/MLP Machine Learning with Python, Clustering, k-means and mean shift, Handling non-numerical data, Examination review
Tagged under: Artificial Intelligence, Decision Trees, Encoding, Feature Engineering, Label Encoding, Machine Learning, Non-Numerical Data, One-hot Encoding, Random Forests
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