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Interfaces in Java are used to define a contract for classes to implement certain methods.
Interfaces are declared using the 'interface' keyword in Java.
Classes can implement interfaces using the 'implements' keyword.
Interfaces can contain method signatures that classes implementing the interface must define.
Interfaces can also contain constants, which are implicitly public, static, and final.
Interfaces can be used to a...
Serialization is the process of converting an object into a stream of bytes to store or transmit data.
Serialization is used to save the state of an object and recreate it when needed.
It is commonly used in Java for saving objects to a file or sending them over a network.
The Serializable interface in Java is used to mark classes as serializable.
Basic Java and Query questions for Java Developer position.
OOPs concept helps in creating modular, reusable and maintainable code.
Polymorphism is the ability of an object to take on many forms.
JVM stands for Java Virtual Machine, which executes Java bytecode.
Database connection coding in Java involves creating a connection object, setting connection properties, and executing SQL queries.
JOIN is used to combine rows fro...
I applied via Approached by Company and was interviewed before Apr 2022. There were 3 interview rounds.
Java basic Coding test
I applied via Naukri.com and was interviewed in Oct 2024. There was 1 interview round.
A min stack is a stack data structure that supports the usual push and pop operations, along with an additional operation to retrieve the minimum element in constant time.
Create a stack to store the elements and another stack to store the minimum values encountered so far.
When pushing an element, check if it is smaller than the current minimum. If so, push it onto the minimum stack.
When popping an element, check if it ...
They are asking C programming output question
They prefer Java language for logical thinking programming round
I applied via LinkedIn and was interviewed before Oct 2023. There were 3 interview rounds.
Preety easy round has basic qunts and reasoning
Was basic problem solving questions and easy ones
Collections in Java are data structures that store and manipulate groups of objects.
Collections framework provides interfaces (List, Set, Map) and classes (ArrayList, HashSet, HashMap) for storing and manipulating data.
Collections offer methods for adding, removing, and accessing elements in a structured way.
Example: ArrayList
Object-oriented programming concepts like inheritance, encapsulation, polymorphism, and abstraction.
Inheritance: Allows a class to inherit properties and behavior from another class.
Encapsulation: Bundling data and methods that operate on the data into a single unit.
Polymorphism: Ability to present the same interface for different data types.
Abstraction: Hiding the complex implementation details and showing only the ne
I applied via Campus Placement and was interviewed before Sep 2023. There were 3 interview rounds.
BST formation code in java
I applied via Campus Placement
It is easy to crack the first round with the basic topics of aptitude.
Must learn string,array,pointer and others to clear this round
Easy to solve math related que
Somewhat difficult in constraints
based on 2 interviews
Interview experience
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