Happiest Minds Technologies Java Developer Interview Questions and Answers for Experienced

Q1. C# basics, Sql Queries ,.net basics and advanced
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Q2. Scenarios based questions
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Q1. Front end backend multiple choice question
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Q1. Telephonic round work experience related
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Q1. Video call with interview panel: marker interface .,serialization , joint ,
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Q1. Questions on core java, Collections, Oops concepts
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Q1. Explain singleton design pattern
Ans. 
Singleton design pattern ensures a class has only one instance and provides a global point of access to it.
• Ensures a class has only one instance by providing a global access point to it

• Uses a private constructor to restrict instantiation of the class

• Provides a static method to access the single instance

• Commonly used in scenarios where only one instance of a class is needed, such as database connections or configuration
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Q1. 1. about your self 2. recent task 3. what is business rule, client script 4. Integration with third part system 5. get all incident row count
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How to reverse linked list.

Q1. What selection sort.
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Q2. What is dynamic memory allocation.
Ans. 
Dynamic memory allocation is the process of allocating memory during program execution.
• Allows programs to request memory at runtime

• Helps in efficient memory management

• Commonly used in languages like C and C++

• Example: using malloc() function in C to allocate memory for an array
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