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Double check locking is a design pattern used to prevent multiple threads from creating multiple instances of a singleton class.
Create a private static instance variable with volatile keyword to ensure visibility across threads
Use synchronized block inside if condition to check and create instance only once
Check instance again inside synchronized block to prevent race condition
Example: private static volatile Singleto...
I applied via Naukri.com and was interviewed in Apr 2024. There were 2 interview rounds.
Inheritance is a concept in object-oriented programming where a class can inherit attributes and methods from another class.
Inheritance allows for code reusability and promotes the concept of hierarchy in programming.
The class that is being inherited from is called the parent class or superclass, while the class that inherits is called the child class or subclass.
Child classes can override inherited methods or add new ...
Encapsulation is the concept of bundling data and methods that operate on the data into a single unit, known as a class.
Encapsulation helps in hiding the internal state of an object and only exposing the necessary functionalities.
It allows for better control over the data by preventing direct access from outside the class.
Encapsulation promotes code reusability and modularity.
Example: In a class representing a bank acc...
Synechron interview questions for designations
I applied via Naukri.com and was interviewed in Nov 2023. There was 1 interview round.
Get interview-ready with Top Synechron Interview Questions
I applied via Naukri.com and was interviewed in May 2023. There were 3 interview rounds.
A load balancer is a device or software that distributes incoming network traffic across multiple servers to ensure efficient use of resources and prevent overload.
Load balancers improve the performance and reliability of applications by distributing traffic evenly across servers.
They can be hardware-based or software-based, and can be implemented at different layers of the network stack.
Common load balancing algorithm...
A web garden is a configuration in which multiple worker processes are used to handle incoming web requests, improving scalability and performance.
Web garden is used to improve the scalability and performance of web applications by utilizing multiple worker processes.
It can help distribute the load of incoming requests across multiple processes, reducing bottlenecks and improving response times.
Web garden can be partic...
A webform is an online form used to collect information from users on a website.
Webforms typically include fields for users to input their name, email, and other relevant information.
Webforms can be used for various purposes such as contact forms, registration forms, surveys, and more.
Webforms can be created using HTML, CSS, and JavaScript, or through online form builders like Google Forms or Typeform.
SQL joins are used to combine rows from two or more tables based on a related column between them.
Use INNER JOIN to return rows when there is at least one match in both tables
Use LEFT JOIN to return all rows from the left table and the matched rows from the right table
Use RIGHT JOIN to return all rows from the right table and the matched rows from the left table
Use FULL JOIN to return rows when there is a match in one
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