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I applied via Company Website and was interviewed in Sep 2022. There were 4 interview rounds.
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ArrayList is implemented as a resizable array, while LinkedList is implemented as a doubly linked list.
ArrayList provides fast random access, LinkedList provides fast insertion and deletion.
ArrayList uses more memory as it needs to allocate a fixed size array, LinkedList uses more memory for storing references to the next and previous elements.
Example: ArrayList is better for scenarios where random access is required, ...
HashMap is non-synchronized and allows null values, while HashTable is synchronized and does not allow null values.
HashMap is non-synchronized, meaning it is not thread-safe, while HashTable is synchronized and thread-safe.
HashMap allows null values for both keys and values, while HashTable does not allow null keys or values.
HashMap is faster than HashTable as it is non-synchronized, but HashTable is preferred in multi...
I am good coder in java coding knowledge.
I applied via Naukri.com and was interviewed in Mar 2021. There were 4 interview rounds.
Yes, finally block will execute even if try and catch have return statement.
The finally block is always executed regardless of whether an exception is thrown or not.
The return statement in try or catch block will be executed before the finally block.
Finally block is commonly used to release resources or perform cleanup operations.
The @Component annotation is a generic stereotype annotation that can be used in place of other annotations.
The @Component annotation is a general-purpose annotation that can be used in place of @Service, @Controller, @Configuration, and @Repository annotations.
However, using more specific annotations can help in better understanding the role of the annotated class.
For example, using @Service annotation on a class that...
No, we cannot use == to compare enums.
Enums are objects and == compares object references, not values.
We should use .equals() method to compare enum values.
I applied via Walk-in and was interviewed in May 2023. There were 2 interview rounds.
Collection , logical
OOPs concept is a programming paradigm based on the concept of objects, Spring Boot is a framework for building Java applications.
OOPs concept stands for Object-Oriented Programming, which focuses on creating objects that interact with each other to solve problems.
It involves concepts like inheritance, encapsulation, polymorphism, and abstraction.
Spring Boot is a framework that simplifies the development of Java applic...
Controller is a class that handles user requests and returns appropriate response. Rest controller is a specialized controller for RESTful web services.
Controller is a class in MVC architecture that handles user requests and interacts with the model and view.
Rest controller is a specialized controller in Spring framework for building RESTful web services.
Rest controller uses annotations like @RestController and @Reques...
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 find 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.
HashMap allows null keys and values, but only one null ...
HashMap is not thread-safe, while ConcurrentHashMap is thread-safe.
HashMap is not synchronized and not thread-safe, while ConcurrentHashMap is thread-safe.
ConcurrentHashMap allows concurrent modifications without causing any ConcurrentModificationException.
ConcurrentHashMap achieves thread-safety by dividing the map into segments, each with its own lock.
I applied via Naukri.com and was interviewed in Apr 2024. There was 1 interview round.
Contiguous array in java
I applied via Recruitment Consulltant and was interviewed before Jun 2023. There were 2 interview rounds.
Construct binary tree from expression
I applied via Recruitment Consulltant and was interviewed before Jun 2023. There was 1 interview round.
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