Khel Group Mean Stack Developer Interview Questions and Answers

They asked LRU implementation of data structure

Q1. Reflection API in java
Ans. 
Reflection API in Java allows for inspecting and modifying classes, methods, fields at runtime.
• Reflection API provides a way to examine and modify the behavior of classes, methods, and fields at runtime.

• It allows access to class information, such as constructors, methods, fields, annotations, etc.

• Reflection can be used for dynamic loading of classes, invoking methods at runtime, and examining annotations.

• Example: Using...read more
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Q2. Memory management jvm
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Coding related to java collections

Q1. Familiar with Design patterns ?explain few
Ans. 
Design patterns are reusable solutions to common problems in software design.
• Design patterns help in creating maintainable and scalable code.

• Examples of design patterns include Singleton, Factory, Observer, and Strategy.

• Singleton pattern ensures a class has only one instance and provides a global point of access to it.

• Factory pattern creates objects without specifying the exact class of object that will be created.

• Obse...read more
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Q2. What is Mutilthreading,explain with examples
Ans. 
Multithreading is the ability of a CPU to execute multiple threads concurrently, allowing for improved performance and responsiveness.
• Multithreading allows multiple tasks to be executed simultaneously on a single CPU.

• Each thread has its own stack and program counter, but shares the same memory space.

• Examples include running multiple processes in a web server, handling user input while performing background tasks, and p
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Systematic interview test

Q1. What is java and oops concepts
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Q1. Some C++ 14/17 questions and OOPs concepts
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Q2. DSA questions based for basic game logics.
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Q1. Advanced OOPs and C++ questions
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Q2. DSA coding questions based on Stacks and Linked list
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Q1. Called me to Noida for a F2F HR round. I wasn’t given any Travel allowance. CTC negotiation was brutal. They were not willing to give me even a 5% hike on my previous salary.The HR and the Team said they’d...read more
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Q2. A month passed by. Sometimes they’d say the technical team who took your interview wasn’t available so that the CTC discussion could be further done. And somedays they’d just delay by saying we’d get back ...read more
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Q3. After a month of wasting my time. The HR finally called and said they rejected me based on the CTC. And are not even willing to negotiate because of my not so well performance in the technical rounds.
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Aptitude and programming language like c and also data structures alogirithm

Q1. SQL questions on joins and project
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Q2. Join two tables using joins in sql
Ans. 
Joining two tables in SQL using JOINs to combine data based on a related column
• 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 of the tables
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One hour aptitude test based on the mathematics ,logical reasoning.

Q1. One basic question on the language you know and one SQL is asked
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Q2. SQL query questions
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Q1. 4 Coding question to be solve live
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