Most Asked Tricky Core Java Interview Questions and Answers for Fresher and Experienced |Code Decode

In Tricky Core Java Interview Questions and Answers for Freshers and Experienced video you will get top tricky core interview question asked in an Interview.

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You may be asked in java interview questions and answers pattern about :
What are the different ways we can break a singleton pattern pattern in Java?
Reflection
Serialization
Cloning
By Executor service, will create separate video on that.

One of the tricky part of java interview questions and answers are :
Difference between
NoClassDefFoundError
and
ClassNotFoundException?
java interview questions and answers for experienced people may be bit trickier.


Apart from String, what else predefined class we can use as Keys in A Map?

java interview questions and answers for experienced people will always cover some java 8 stuff
Given an Employee list , sort employees based on their salaries in desc order?

Java interview questions and answers will always cover top java interview questions and answers and java 8 always dominates it now a days
Fetch Top 3 salaried Employees?

Java interview questions and answers may be twisted to fetch result in different manner too as shown as below
Fetch all employees having salary less than 3rd highest salary?

Java interview questions and answers playlist is referenced below for easy access.

In top java interview questions and answers or for core java interview questions and answers , you will never be asked straight forward questions like below:

Why is char[] preferred over String for passwords?


In Java, Strings are immutable and are stored in the String pool. What this means is that, once a String is created, it stays in the pool in memory until being garbage collected. Therefore, even after you’re done processing the string value (e.g., the password), it remains available in memory for an indeterminate period of time thereafter (again, until being garbage collected) which you have no real control over.

Therefore, anyone having access to a memory dump can potentially extract the sensitive data and exploit it.

In contrast, if you use a mutable object like a character array, for example, to store the value, you can set it to blank once you are done with it with confidence that it will no longer be retained in memory.

Theses were some java interview questions and answers

Code Decode Playlists

Most Asked Core Java Interview Questions and Answers :    • Core Java frequently asked Interview Quest...  

Advance Java Interview Questions and Answers :    • Advance Java Interview Questions  

Java 8 Interview Questions and Answers :    • Java 8 Interview Questions(New Features)  

Hibernate Interview Questions and Answers :    • Hibernate Interview Questions Java  

Spring Boot Interview Questions and Answers :    • Advance Java Interview Questions  

Angular Playlist :    • Angular Course Introduction || Angular 8  

GIT :    • GIT  

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