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I applied via campus placement at MH Saboo Siddik College of Engineering, Mumbai and was interviewed in Mar 2024. There were 2 interview rounds.
HashMap is a data structure that stores key-value pairs and uses hashing to efficiently retrieve values.
HashMap internally uses an array of linked lists to store key-value pairs.
When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.
If multiple keys hash to the same index, a linked list is used to handle collisions.
To retrieve a value, the key is hashed again to fi...
Linked list is a data structure where each element points to the next element in the sequence.
Nodes contain data and a reference to the next node
Operations include insertion, deletion, and traversal
Example: Singly linked list: 1 -> 2 -> 3 -> null
I applied via Referral and was interviewed in Aug 2022. There were 3 interview rounds.
This interview question covers various topics including abstract class, interface, HashMap, ArrayList, Linked List, String reversal, dependency injection, IOC container, and singleton class.
Abstract class is a class that cannot be instantiated and can have both abstract and non-abstract methods.
Interface is a blueprint of a class that can only have abstract methods and cannot be instantiated.
HashMap is a data structure...
Controller is a general term for handling requests, while Rest Controller is specifically for RESTful web services.
Controller is responsible for handling incoming requests and returning responses.
Rest Controller is a specialized type of controller that is used for building RESTful web services.
Rest Controller uses HTTP methods like GET, POST, PUT, DELETE to perform CRUD operations on resources.
Rest Controller returns d...
Stream API is a new feature in Java 8 that allows processing of collections in a functional way.
Stream API provides a set of functional interfaces and methods to perform operations on collections.
It supports parallel processing of collections, making it faster for large datasets.
Examples of operations include filtering, mapping, sorting, and reducing.
Stream API can be used with both primitive and object types.
It promot...
Optional class in Java is used to represent a value that may or may not be present.
Optional class was introduced in Java 8.
It is used to avoid null pointer exceptions.
It can be used with streams to filter out null values.
Example: Optional
Example: Optional
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posted on 21 Jan 2025
Normal logical, verbal, and quantitative ability questions.
I applied via campus placement at Kongu Arts and Science College, Erode and was interviewed in Mar 2024. There was 1 interview round.
posted on 15 Feb 2025
Coading round basic oops concept
I was interviewed before Jan 2024.
A job refers to a specific task or set of tasks performed by an individual, while a position refers to a role or title within an organization.
A job is temporary and can change frequently, while a position is more permanent and stable.
A job can be specific to a project or assignment, while a position is typically broader and encompasses multiple tasks and responsibilities.
A job can be held by multiple individuals at dif...
Data migration involves transferring data from one system to another while ensuring data integrity and minimal downtime.
Identify the data to be migrated and its format
Choose a migration method (manual or automated)
Test the migration process on a small sample of data
Perform the actual migration with proper backup and security measures
Verify the migrated data for accuracy and completeness
posted on 31 Mar 2024
I applied via Walk-in and was interviewed before Mar 2023. There were 3 interview rounds.
Aptitude and logical reasoning
String problem
basic java
I applied via Company Website and was interviewed in Mar 2024. There were 2 interview rounds.
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