DELTA Full Stack Developer Interview Questions and Answers

Q1. What is polymorphism
Ans. 
Polymorphism is the ability of a function or method to behave differently based on the object it is acting upon.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

• Example: Inheritance allows a child class to override a method from its parent class, providing different func
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Q2. Why You choose java
Ans. 
I chose Java for its platform independence, strong community support, and extensive libraries.
• Platform independence allows Java code to run on any device with a JVM

• Strong community support ensures access to resources and help when needed

• Extensive libraries provide pre-built solutions for common programming tasks
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Q1. Related to skills that you have mentioned in your resume.
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It's Amcat test having 4 parts which is grammar, logical reasoning, basic mathematics and coding.

Q1. Another on screening nterview .
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It was a hacker earth test. The questions i had got was weird and the answer was something along the lines of if(num==2) return "y" else return "N"

Q1. Usual leetcode questions
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Q1. Twitter system design
Ans. 
Twitter is a social media platform that allows users to share short messages called tweets.
• Twitter uses a distributed system architecture to handle high traffic and ensure scalability.

• The system consists of multiple servers for different functions such as user authentication, tweet storage, and search indexing.

• Twitter also uses caching and load balancing techniques to improve performance.

• To handle real-time updates, Tw...read more
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Q2. Api design with filters
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API design with filters allows users to retrieve specific data by applying filters to the API request.
• Filters can be applied to different fields in the API request, such as date range, location, or category.

• API design should include clear documentation on available filters and their syntax.

• Filters can be combined to create more complex queries.

• Examples of filter syntax include using operators such as '>', '<', '>=', '<...read more
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