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Multi-threading allows concurrent execution of multiple threads. Collection framework provides a set of interfaces and classes for storing and manipulating data.
Multi-threading improves performance by utilizing multiple cores of CPU
Collection framework provides interfaces like List, Set, Map for storing data
Java provides synchronized collections for thread-safe operations
ConcurrentHashMap is a thread-safe implementatio
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posted on 18 Mar 2024
I applied via Company Website and was interviewed in Feb 2024. There were 3 interview rounds.
Basic question asked
Object-oriented programming paradigm that focuses on objects and classes for code organization and reusability.
Encapsulation: bundling data and methods that operate on the data into a single unit (object)
Inheritance: ability of a class to inherit properties and behavior from another class
Polymorphism: ability to present the same interface for different data types
I was interviewed before Sep 2016.
I was interviewed in Mar 2017.
Oops concepts in Java
Encapsulation - hiding implementation details
Inheritance - reusing code and creating parent-child relationships
Polymorphism - multiple forms of a method or object
Abstraction - creating abstract classes and interfaces
Example: Encapsulation - using private variables and public methods
Example: Inheritance - creating a subclass that inherits from a superclass
Example: Polymorphism - using method overloa...
Altering columns in databases involves modifying the structure of a table by adding, deleting or modifying columns.
Use ALTER TABLE statement to modify columns
Add new columns using ADD COLUMN
Delete columns using DROP COLUMN
Modify columns using MODIFY COLUMN
Changing column data type may result in data loss
Reversing a number in Java
Convert the number to a string
Use StringBuilder to reverse the string
Convert the reversed string back to a number
To extract words from a line in Java, split the line using whitespace as delimiter.
Use the split() method of String class
Pass the whitespace regex as argument to split() method
Iterate over the resulting array to get individual words
I applied via Naukri.com and was interviewed in Oct 2019. There were 5 interview rounds.
I applied via Recruitment Consultant and was interviewed before Oct 2020. There were 3 interview rounds.
I applied via Naukri.com and was interviewed before May 2020. There were 4 interview rounds.
C# concepts including abstraction, interface, abstract method, abstract class, polymorphism, encapsulation, inheritance, and serialization.
Abstraction: hiding implementation details
Interface: defining a contract for behavior
Abstract method: method without implementation
Abstract class: class with one or more abstract methods
Polymorphism: ability of objects to take on multiple forms
Encapsulation: bundling data and behavi...
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