HackerRank Front end Developer Interview Questions and Answers

Q1. Explain basics of c#
Ans. 
C# is a programming language developed by Microsoft for building a wide range of applications on the .NET framework.
• C# is an object-oriented language with features like classes, inheritance, and polymorphism.

• It is strongly typed, meaning variables must be declared with a specific data type.

• C# supports modern programming concepts like async/await for asynchronous programming.

• It is commonly used for developing desktop, w...read more
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Q2. C# basics oops sql server
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Q1. Basic react questions
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Basic DSA Questions of array

Q1. Implement tail f
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Implement tail -f command

Q1. Kafka partitions
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Q2. Elasticsearch queries
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Q1. Why Browserstack?
Ans. 
Browserstack is a popular cloud-based cross-browser testing tool used by developers worldwide.
• Provides access to a wide range of browsers and devices for testing

• Allows for parallel testing to save time and increase efficiency

• Integrates with popular testing frameworks like Selenium and Appium

• Offers features like screenshots, video recordings, and debugging tools

• Used by companies like Microsoft, Twitter, and Airbnb for t
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Q2. Any challenge you faced at current company?
Ans. 
Yes, I faced a challenge in integrating a new third-party API with our existing system.
• Had to understand the documentation of the API thoroughly

• Encountered compatibility issues with our system

• Worked closely with the API provider to troubleshoot and resolve issues
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Q1. Coding question on DSA
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Q2. Design pattern followed by basic java questions
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Q1. Design patterns in java
Ans. 
Design patterns in Java are reusable solutions to common problems in software design.
• Design patterns help in creating flexible, maintainable, and scalable code.

• Some common design patterns in Java include Singleton, Factory, Observer, and Strategy.

• Each design pattern has its own purpose and can be applied in different scenarios.

• Design patterns promote code reusability and help in organizing code in a structured manner.
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Q2. Database designing and java8
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The aptitude test was in online mode. There were 20 mcq questions and 5 coding questions ranging from easy to hard

After the Aptitude test, the gd was kept in offline mode ( at office ), the topic was "the pros and cons of online classes

Q1. In the 1st technical round, basic questions regarding the languages which i have mentioned in resume was asked. I mentioned python and C in my resume and a coding problem was asked to solve and to further ...read more
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Q1. In the second technical OOPS concepts and DSA questions were asked
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Aptitude test such as profit and loss , blood relations

Questions on string and map

Q1. Questions like will you be able to work after your assigned time
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Basic questions of dbms ,os

Q1. Delete middle node of linked list
Ans. 
To delete the middle node of a linked list, we can iterate through the list to find the middle node and then remove it by adjusting the pointers.
• Iterate through the linked list to find the middle node by using two pointers - one moving one node at a time and the other moving two nodes at a time.

• Once the middle node is found, adjust the pointers to skip over the middle node and connect the nodes before and after it.

• Hand...read more
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Q2. N queen problem
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