Why does Elastic Net exist if you already have Lasso and Ridge?
Lasso delivers sparsity, Ridge copes with correlated features, and each stumbles where the other excels. Elastic Net combines them for a specific, common failure. Here is when it earns its two hyperparameters.
Updated Sep 2026 · Grounded in real GenAI, LLM, and AI/ML engineering interview loops and written to a senior-engineer editorial bar.
Lasso delivers sparsity, Ridge copes with correlated features, and each stumbles where the other excels. Elastic Net combines them for a specific, common failure. Here is when it earns its two hyperparameters.
Lead with where the obvious approach breaks, because that is the judgment they are screening for — most candidates jump straight to the happy path and lose the room.
Then walk the failure back through the pipeline in order, naming the one metric the customer's exec sponsor actually cares about before you propose the fix.
