Interview Questions

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Java Interview Questions

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61.

What is connection pooling and why is it important?

intermediate

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62.

What are database transactions and ACID properties?

intermediate

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63.

What tools can you use for Java application profiling?

intermediate

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64.

What is the difference between StringBuilder and StringBuffer performance?

intermediate

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65.

What is Test-Driven Development (TDD)?

intermediate

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66.

What is mocking and why is it useful?

intermediate

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67.

What are Java 8 features and their benefits?

intermediate

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68.

What is functional programming in Java?

intermediate

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69.

What is the Stream API and its benefits?

intermediate

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70.

What are annotations and how do you create custom annotations?

intermediate

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71.

What is the difference between fail-fast and fail-safe in Java?

intermediate

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72.

What are the new features in recent Java versions (9-17)?

intermediate

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73.

What is the difference between Association, Aggregation, and Composition?

expert

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74.

Explain the internal working of HashMap.

expert

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75.

What happens if an exception is thrown in a finally block?

expert

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76.

What is deadlock and how can you prevent it?

expert

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77.

What is the difference between CountDownLatch and CyclicBarrier?

expert

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78.

What is the Fork/Join framework?

expert

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79.

What are the different types of garbage collectors?

expert

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80.

What is the difference between NIO and traditional I/O?

expert

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Showing 61 to 80 of 89 results

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