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2 questions medium level of leetcode
Hands of Straight question of two pointers.
Tasks scheduler
I applied via LinkedIn and was interviewed in Oct 2023. There were 2 interview rounds.
I applied via Company Website and was interviewed in Feb 2024. There was 1 interview round.
Design dream11. Bonus - how notification will be sent to customer for milestone of a player they have followed at scale.
Two DSA Questions
1. Check whether two strings are anagram or not?
2. Create power function without using Math.pow() library?
Designing WhatsApp involves creating a high-level design for the messaging app, focusing on features like chat, groups, calls, and media sharing.
Implement chat functionality with real-time messaging using sockets
Design group chat feature with ability to add/remove members
Include end-to-end encryption for secure messaging
Develop voice and video calling functionality
Allow media sharing such as photos, videos, and documen
Design a ticket booking system for efficient and user-friendly experience.
Use a database to store information about available tickets, users, and bookings
Implement a user-friendly interface for users to search for and book tickets
Include features like seat selection, payment processing, and booking confirmation
Consider scalability and performance to handle a large number of users and bookings
I applied via Recruitment Consulltant and was interviewed in May 2024. There were 3 interview rounds.
I was asked two DSA questions and duration was of one hour.
1. Calculate Sum of edges of LinkedList
2. Given a list of numbers, find out all the pythagorean triplets.
This was also a DSA round for 1 hour and expected to solve two problems (Medium)
This was a system design round for one hour
Find duplicates in an ArrayList of strings.
Iterate through the ArrayList and use a HashSet to keep track of seen elements.
If an element is already in the HashSet, it is a duplicate.
Store the duplicates in a separate ArrayList or print them directly.
I applied via Recruitment Consulltant and was interviewed before May 2023. There were 2 interview rounds.
Primary is used to define a primary bean when multiple beans of the same type are present, while Qualifier is used to specify which bean to autowire when multiple beans of the same type are present.
Primary annotation is used to give a higher preference to a bean when multiple beans of the same type are present in the Spring application context.
Qualifier annotation is used to specify which bean to autowire when multiple...
Fault tolerance in Microservices can be achieved through redundancy, graceful degradation, and circuit breakers.
Implementing redundancy by having multiple instances of each microservice running to handle failures.
Using graceful degradation to ensure that the system can still function even if certain microservices are unavailable.
Utilizing circuit breakers to prevent cascading failures by temporarily stopping requests t
Implementing Spring Security involves configuring security settings in the Spring application.
Add Spring Security dependency in pom.xml
Configure security settings in SecurityConfig class
Define user roles and permissions
Use annotations like @EnableWebSecurity and @Secured
OAuth 2 is an authorization framework that allows a third-party application to obtain limited access to an HTTP service.
OAuth 2 is used for delegated access, allowing a user to grant a third-party application access to their resources without sharing their credentials.
It involves the use of access tokens, which are issued by the authorization server after the user authenticates and authorizes the application.
OAuth 2 su...
Java uses automatic memory management through garbage collection to allocate and deallocate memory.
Java uses garbage collection to automatically manage memory by deallocating objects that are no longer needed.
The JVM has a heap where objects are allocated and garbage collection is performed to reclaim memory.
Java provides the 'finalize()' method for objects to perform cleanup before they are garbage collected.
Memory le...
Different types of garbage collection algorithms in software development.
Mark and Sweep: Identifies and removes unreachable objects.
Generational: Divides objects into different generations based on age.
Parallel: Uses multiple threads to perform garbage collection concurrently.
Incremental: Spreads garbage collection work over multiple cycles to reduce pause times.
Executors are a class that provides factory and utility methods for Executor, ExecutorService is an interface that represents an asynchronous execution service.
Executors class provides factory and utility methods for Executor interface
ExecutorService is an interface that represents an asynchronous execution service
ExecutorService extends Executor interface
ExecutorService provides methods to manage termination and produ...
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