Type erasure means generic type information is removed at runtime. As a result, you can’t do `new T()`, `T.class`, or `instanceof T`, and some generic checks are only compile‑time. The runtime sees raw types.
Advanced answer
Deep dive
Expanding on the short answer — what usually matters in practice:
Explain the "why", not just the "what" (intuition + consequences).
Trade-offs: what you gain/lose (time, memory, complexity, risk).
Edge cases: empty inputs, large inputs, invalid inputs, concurrency.
Examples
A tiny example (an explanation template):
// Example: discuss trade-offs for "what-is-type-erasure-in-java-generics-and-what-l"
function explain() {
// Start from the core idea:
// Type erasure means generic type information is removed at runtime. As a result, you can’t
}
Common pitfalls
Too generic: no concrete trade-offs or examples.
Mixing average-case and worst-case (e.g., complexity).