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I applied via Referral and was interviewed before Jan 2020. There were 6 interview rounds.
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HashMap is a data structure that stores key-value pairs and provides constant time complexity for basic operations.
HashMap allows quick access to values based on their keys
Keys must be unique and values can be duplicated
HashMap is not thread-safe and requires synchronization for concurrent access
Java's HashMap implementation uses hashing to distribute keys across buckets
I applied via Campus Placement and was interviewed before Dec 2022. There were 3 interview rounds.
Basic concepts of programming
I applied via Approached by Company and was interviewed before Jul 2021. There was 1 interview round.
To write a REST API from scratch, I would follow these steps:
Define the resources and endpoints
Choose a programming language and framework
Implement CRUD operations for each resource
Use HTTP methods and status codes correctly
Add authentication and authorization
Test the API using tools like Postman
Document the API using tools like Swagger
I applied via Naukri.com and was interviewed in Sep 2022. There were 3 interview rounds.
I applied via Campus Placement and was interviewed in Apr 2024. There were 2 interview rounds.
Reverse a given string
Use a loop to iterate through the characters of the string
Swap the characters from start to end to reverse the string
Return the reversed string
Some common Springboot annotations used in projects are @RestController, @Autowired, @RequestMapping, @Service, @Component, @Repository.
@RestController - Used to define RESTful web services.
@Autowired - Used for automatic dependency injection.
@RequestMapping - Used to map web requests to specific handler methods.
@Service - Used to indicate that a class is a service.
@Component - Used to indicate that a class is a Spring...
I applied via Naukri.com and was interviewed in Apr 2021. There were 3 interview rounds.
I applied via Naukri.com and was interviewed before May 2023. There was 1 interview round.
Objects in Java can be created in multiple ways, including using new keyword, cloning, deserialization, and reflection.
Using the 'new' keyword
Cloning an existing object
Deserialization from a file or network
Using reflection to create objects dynamically
Interface is a contract that defines the methods a class must implement, while abstract class can have both implemented and abstract methods.
Interface methods are public and abstract by default, while abstract class can have abstract and non-abstract methods.
A class can implement multiple interfaces but can only inherit from one abstract class.
Interfaces are used to achieve multiple inheritance in Java, while abstract ...
Serialization is the process of converting an object into a format that can be easily stored or transmitted.
Serialization is used to convert complex data structures or objects into a stream of bytes.
Serialized data can be stored in files, databases, or sent over a network.
Common serialization formats include JSON, XML, and Protocol Buffers.
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The question is asking for the current time and the angles formed by the hour and minute hands on a clock.
The angle between the hour and minute hands of a clock can be calculated using the formula: angle = |(30*hour - (11/2)*minutes)|
At 3:00, the angle between the hour and minute hands is 90 degrees.
At 6:00, the angle between the hour and minute hands is 180 degrees.
At 9:00, the angle between the hour and minute hands
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