Java Technical Lead Interview Questions

6,748 java technical lead interview questions shared by candidates

Overall exp., technologies worked upon, versions, duration Hashcode vs equals, contract b/w both by java Save employee object in hashmap when hashcode returns 1 and equals always “true” , and make e1,e2,e3 as key or employee.id as key, size of hashmap will be? Method overriding Class lock, method lock Can we take lock on object of class when class level lock is already acquired Executer apis in java How to restrict add method on list Diff scopes in spring Are controllers threadsafe How to make the same threadsafe Runnable vs callable Aggregation and composition Hibernate caching Session vs session factory Comparable vs comparator
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Technical Lead - Java

Interviewed at Iris Software

3.8
May 30, 2019

Overall exp., technologies worked upon, versions, duration Hashcode vs equals, contract b/w both by java Save employee object in hashmap when hashcode returns 1 and equals always “true” , and make e1,e2,e3 as key or employee.id as key, size of hashmap will be? Method overriding Class lock, method lock Can we take lock on object of class when class level lock is already acquired Executer apis in java How to restrict add method on list Diff scopes in spring Are controllers threadsafe How to make the same threadsafe Runnable vs callable Aggregation and composition Hibernate caching Session vs session factory Comparable vs comparator

1. This Round is like screening ,basic questions and very high level picture of the some scenarios like how can you get millions of records from DB,designpatterns what ever you have worked on ,spring ioc etc.. 2.Round too is average not too much technical but questions need a decent solution how a websrivce changes can be updated to the clients ?,wht is exception higherrarchy,pagination concept etc..
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Java Lead

Interviewed at Invesco

3.8
Dec 2, 2015

1. This Round is like screening ,basic questions and very high level picture of the some scenarios like how can you get millions of records from DB,designpatterns what ever you have worked on ,spring ioc etc.. 2.Round too is average not too much technical but questions need a decent solution how a websrivce changes can be updated to the clients ?,wht is exception higherrarchy,pagination concept etc..

1) Write a program to find all files with same name on file system and their path 2) SQL employee department kind of query 3) When will you use hibernate , iBatis and toplink ? 4) SSL 5) Producer is producing @ 10 TPS , there is queue and consumer can consume only @ 5TPS then what would you do without adding an infrastructure. Then changed the question the at peak time its 10TPS and then 1 TPS whatwould be approach.
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JAVA LEAD - Engineer - Programmer

Interviewed at DBS Bank

3.8
Oct 22, 2016

1) Write a program to find all files with same name on file system and their path 2) SQL employee department kind of query 3) When will you use hibernate , iBatis and toplink ? 4) SSL 5) Producer is producing @ 10 TPS , there is queue and consumer can consume only @ 5TPS then what would you do without adding an infrastructure. Then changed the question the at peak time its 10TPS and then 1 TPS whatwould be approach.

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