What is Overfitting and Underfitting in Machine Learning?

When building ML models, two common problems occur:
Overfitting
Overfitting happens when a model learns the training data too well, including noise and outliers.
It performs very well on training data but poorly on new data.
Underfitting
Underfitting happens when a model is too simple and fails to capture patterns in data.
How to Prevent Overfitting?
Use more data
Apply cross-validation
Use regularization (L1/L2)
Prune decision trees
A good model balances bias and variance for better generalization.
Top Machine Learning Algorithms Every Engineer Should Know
Here are some essential ML algorithms:
Linear Regression – Used for predicting continuous values.
Logistic Regression – Used for classification problems.
Decision Trees – Easy to interpret and powerful.
Random Forest – Ensemble method improving accuracy.
K-Means Clustering – Popular clustering algorithm.
Neural Networks – Foundation of deep learning.
Mastering these algorithms builds a strong ML foundation.
Why Machine Learning is the Future of Technology
Machine Learning is reshaping the world. From self-driving cars to AI chatbots, ML systems are becoming smarter every day.
Industries using ML:
Healthcare (disease prediction)
Finance (fraud detection)
Cybersecurity (threat detection)
E-commerce (recommendation systems)
As data continues to grow exponentially, Machine Learning will play an even bigger role in decision-making and automation.
Learning ML today means preparing for tomorrow’s technology landscape.