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I appeared for an interview before Apr 2023.
2 DSA questions one based on Bit manipulation and other one DP.
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I applied via Company Website and was interviewed in Feb 2022. There were 2 interview rounds.
Create a github app to show app public close pull request.
I applied via Campus Placement and was interviewed before Apr 2022. There were 4 interview rounds.
45 Easy to Medium Analytical questions, 3 Coding questions , 2 easy, last one was stock spanning problem.
I applied via Naukri.com and was interviewed in Jun 2022. There were 2 interview rounds.
In apri basic question logicial quesion
The test was easy basic questins they asked
I applied via LinkedIn and was interviewed before Aug 2023. There were 2 interview rounds.
I applied via Naukri.com and was interviewed in Jul 2020. There were 4 interview rounds.
I appeared for an interview before Sep 2020.
Round duration - 90 minutes
Round difficulty - Easy
Nice environment
Given a binary tree with integer values in its nodes, your task is to print the zigzag traversal of the tree.
In zigzag order, level 1 is printed from left to right...
Implement a function to print the zigzag traversal of a binary tree.
Traverse the tree level by level, alternating the direction of traversal for each level.
Use a queue to keep track of nodes at each level.
Print the nodes in zigzag order as per the given pattern.
Round duration - 90 minutes
Round difficulty - Medium
Nice Environment
Given a positive integer N
, your task is to identify all prime numbers less than or equal to N
.
A prime number is a natural number greater than 1 that has no po...
Identify all prime numbers less than or equal to a given positive integer N.
Iterate from 2 to N and check if each number is prime
Use the Sieve of Eratosthenes algorithm for better efficiency
Optimize by only checking up to the square root of N for divisors
DBMS was used to store and manage data in the project, handled problems by optimizing queries and database design.
Used DBMS to store and manage project data efficiently
Optimized queries for better performance
Designed database schema to handle data effectively
Resolved concurrency issues by implementing proper locking mechanisms
Tip 1 : Do atleast 1 good projects
Tip 2 : Practice Atleast 300 Questions
Tip 3 : Should be able to explain your project
Tip 1 : Always be true with the resume
Tip 2 : Do not put false things on resume.
I appeared for an interview in Jun 2017.
Ajax calls allow for asynchronous communication between client and server without reloading the page.
Ajax stands for Asynchronous JavaScript and XML
Uses XMLHttpRequest object to send and receive data
Allows for partial page updates without reloading the entire page
Can handle data in various formats such as JSON, XML, HTML, and plain text
Example: $.ajax({url: 'example.com', success: function(data){console.log(data)}});
REST is lightweight and uses HTTP while SOAP is XML-based and has more features.
REST uses HTTP methods like GET, POST, PUT, DELETE while SOAP uses XML messaging.
REST is stateless while SOAP can maintain state.
REST is faster and easier to use while SOAP is more secure and reliable.
REST is used for web services while SOAP is used for enterprise-level services.
Example of REST: Twitter API. Example of SOAP: Amazon Web Serv
GET and POST are HTTP methods used for sending data to a server.
GET is used to retrieve data from a server
POST is used to submit data to a server
GET requests can be cached and bookmarked
POST requests are not cached and cannot be bookmarked
GET requests have length restrictions
POST requests have no length restrictions
GET requests are less secure than POST requests
Observer pattern is a design pattern in which an object maintains a list of its dependents and notifies them automatically of any state changes.
Also known as publish-subscribe pattern
Used in event-driven systems
Allows loose coupling between objects
Example: A weather station broadcasts weather updates to multiple displays
Example: A stock market ticker notifies multiple investors of stock price changes
Singleton is a design pattern that restricts the instantiation of a class to a single object.
Singleton ensures that only one instance of a class exists in the entire application.
It provides a global point of access to the instance.
Commonly used in scenarios where a single instance needs to coordinate actions across the system.
Example: Database connection manager, logger, configuration manager.
Immutable in Java refers to objects whose state cannot be changed after creation.
String, Integer, and other wrapper classes are immutable in Java.
Immutable objects are thread-safe and can be shared without synchronization.
To create an immutable class, make all fields final and private, and don't provide setters.
Examples of immutable classes in Java include LocalDate, LocalTime, and LocalDateTime.
Creating immutable in Java
Use final keyword to make variables immutable
Use private constructor to prevent object modification
Use defensive copying to prevent modification of mutable objects
Use enum to create immutable objects
Use String class to create immutable strings
Dependency injection is a design pattern that allows objects to receive dependencies rather than creating them internally.
It helps to decouple the code and makes it more testable and maintainable.
It allows for easier swapping of dependencies without changing the code.
There are three types of dependency injection: constructor injection, setter injection, and interface injection.
Example: Instead of creating a database co...
CORS stands for Cross-Origin Resource Sharing. It is a security feature implemented in web browsers to restrict access to resources from different origins.
CORS allows web servers to specify which origins are allowed to access its resources
It is implemented using HTTP headers
CORS prevents malicious websites from accessing sensitive data from other websites
Examples of resources that may be restricted by CORS include cook
CORS can be overcome by configuring the server to allow cross-origin requests.
Configure the server to include the Access-Control-Allow-Origin header
Use JSONP (JSON with Padding) to bypass CORS restrictions
Use a proxy server to make the request on behalf of the client
Use a browser extension to disable CORS restrictions during development
Use a server-side proxy to forward requests to the target server
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