💡 20 Java Stream Interview Questions — Every Backend Developer Must Know

#java #javastream #backenddevelopment #softwaredevelopment

Preparing for backend interviews? Java Streams are a must. Here’s a quick snapshot 👇

🔹 What is a Stream? → Processes data functionally
🔹 map() vs flatMap() → transform vs flatten
🔹 filter() → conditional selection
🔹 reduce() → aggregation
🔹 collect() → convert to collection
🔹 Intermediate vs Terminal ops
🔹 findFirst() vs findAny()
🔹 distinct(), sorted()
🔹 Parallel streams (when to use/avoid)
🔹 peek() for debugging
🔹 limit() vs skip()
🔹 Optional in Streams