AWS Certified Cloud Practitioner

Explanation

Text Embeddings is the correct technique for converting text into numeric vectors for similarity-based recommendation systems.

Why Text Embeddings?

1. Semantic Understanding: Text embeddings capture semantic meaning and contextual relationships between words, unlike simple tokenization or bag-of-words approaches.

2. Dense Vector Representation: They create dense, low-dimensional vector representations that preserve semantic similarity - similar items will have vectors that are close together in the vector space.

3. Ideal for Similarity Search: This makes embeddings perfect for recommendation systems where you need to find similar items based on text descriptions.

Why Not the Other Options?

• Tokenization (A): This is just the process of breaking text into individual words or tokens - it doesn't create numeric vectors.

• Bag-of-Words (B): While this creates numeric vectors, it results in sparse, high-dimensional vectors that don't capture semantic meaning or word relationships well.

• Stemming (D): This is a text normalization technique that reduces words to their root form, but doesn't create numeric vectors.

Real-World Application

For an e-commerce recommendation system, text embeddings would allow the platform to:

• Find products with similar descriptions even when different words are used

• Capture nuanced relationships between products

• Enable efficient similarity searches using vector databases

This approach is commonly used in modern recommendation systems and natural language processing applications.