Most Asked Core Java Interview Questions in 2025

By Team foundit April 04, 2025

Common Core Java Questions

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Basic Java Concepts

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OOP Concepts

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Exception Handling

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Collections Framework

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Multithreading and Concurrency

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Streams API

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Lambda Expressions

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Design Patterns

[{"selector":"#anim-2e0e0728-583d-41f7-a4b1-1e390228a6dc","keyframes":{"opacity":[1,1]},"delay":10,"duration":1500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-87a01462-9a3d-475a-be2e-52c4a6091a9c","keyframes":{"transform":["scale(3)","scale(1)"]},"delay":10,"duration":1500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] [{"selector":"#anim-f24ba602-e3ff-42fb-9cfa-0311cafd2ea0","keyframes":{"opacity":[0,1]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-86423686-2afe-44c9-a7fc-b5266e4bc460","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] [{"selector":"#anim-2e32381d-afe6-4b43-8f63-88a8fc996992","keyframes":{"opacity":[0,1]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-9e2ed632-c3b7-4561-8689-e9a824cfd98e","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] Explain common Java design patterns like Singleton, Factory, and Observer.

Garbage Collection

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Ready To Apply

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