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Math and verbal round .
General topics to speak
Implement a function to find duplicates in an array of strings using Hashmap.
Create a Hashmap to store the frequency of each string in the array
Iterate through the array and check if the frequency of any string is greater than 1
If yes, add it to the list of duplicates
Return the list of duplicates
I applied via Naukri.com and was interviewed before Jul 2021. There was 1 interview round.
Hashmap is a data structure that stores key-value pairs and provides constant time complexity for insertion, deletion, and retrieval.
Hashmap uses hashing function to map keys to indices in an array
Collisions can occur when two keys map to the same index, which can be resolved using separate chaining or open addressing
Java implementation: HashMap
Spring is a framework while Spring Boot is a tool that simplifies Spring application development.
Spring Boot provides auto-configuration and embedded servers.
Spring requires more configuration and setup.
Spring Boot is opinionated and follows 'convention over configuration'.
Spring Boot reduces boilerplate code.
Spring Boot is ideal for microservices and standalone applications.
The type of controller in Spring is @Controller and the type of annotations are @RequestMapping and @ResponseBody.
@Controller is used to mark a class as a Spring MVC controller.
@RequestMapping is used to map a URL to a method in a controller.
@ResponseBody is used to indicate that the return value of a method should be serialized and returned as the response body.
Junkins is not a known term in software engineering.
Junkins is not a term used in software engineering.
It is possible that the interviewer misspoke or meant to ask a different question.
It is important to clarify any confusion or misunderstandings during an interview.
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