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5,284 senior developer java interview questions shared by candidates

My challenge was a simple project to implement. with core Java. Unfortunately the expected result was not explained clearly and when I ask the team leader for more explanation, he showed unusual reaction! After sending my code, they rejected it without any feedback!
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Senior Java Developer

Interviewed at 360T Trading Networks

3.4★
Dec 19, 2019

My challenge was a simple project to implement. with core Java. Unfortunately the expected result was not explained clearly and when I ask the team leader for more explanation, he showed unusual reaction! After sending my code, they rejected it without any feedback!

Immutable class Immutable collection Exceptions in inheritance Interface vs Abstract How to prevent Singleton Pattern from Reflection, Serialization and Cloning? Atomic operations what-is-a-serialversionuid-and-why-should-i-use-it If you are trying to restore (deserialization) empdata.dat to the Employee class, you can see it is not correct. Those are two different formats. Note: Technically, this will deserialize without error, skipping the missing field. But your business logic output may not as expected. Transient super.super() why to implement hashcode and equals in java Notify and NotifyAll Thread safety in singleton Static methods cannot be overridden because they are not dispatched on the object instance at runtime. How ConcurrentHashMap Works Internally in Java
avatar

Senior Java Developer

Interviewed at Morgan Stanley

3.9★
Dec 23, 2020

Immutable class Immutable collection Exceptions in inheritance Interface vs Abstract How to prevent Singleton Pattern from Reflection, Serialization and Cloning? Atomic operations what-is-a-serialversionuid-and-why-should-i-use-it If you are trying to restore (deserialization) empdata.dat to the Employee class, you can see it is not correct. Those are two different formats. Note: Technically, this will deserialize without error, skipping the missing field. But your business logic output may not as expected. Transient super.super() why to implement hashcode and equals in java Notify and NotifyAll Thread safety in singleton Static methods cannot be overridden because they are not dispatched on the object instance at runtime. How ConcurrentHashMap Works Internally in Java

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