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Data Structures & AlgorithmsLearning
LESSON 46 / 75·2 min readIntermediate

Important interview questions for Java

Good to knowConcept lesson
01 Understand02 Recall03 Prepare
  1. Explain difference between ArrayList and LinkedList.
  2. When do you use HashMap vs TreeMap?
  3. How does PriorityQueue work?
  4. What is the difference between == and .equals() in Java?
  5. Why is String immutable?
  6. How do you detect a cycle in a linked list?
  7. What is the difference between BFS and DFS?
  8. Why is binary search efficient?
  9. How do you handle recursion limit problems?
  10. Explain time complexity of hashmap operations.
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Important interview questions for Java

Use your own words. Explain an example and one limitation before checking the explanation.

Check your explanation
  1. Explain difference between ArrayList and LinkedList.
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Important interview questions for Java

Data Structures & Algorithms·Java implementations

1. Explain difference between ArrayList and LinkedList.

Intermediate2 min read
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YOUR NEXT STEP

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Adapted from 15_DSA_JAVA.md · “13. Important interview questions for Java”. Examples are study fragments; framework behavior can depend on your version.