CognitivZen Technologies Interview Questions, Process, and Tips

Q1. Few coding questions
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Q2. Previous project detailed explanation
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Q3. Oops conceptsexplanation
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Q4. What is Polymorphism
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Polymorphism is the ability of a single function or method to operate on different types of data.
• 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: Animal superclass with subclasses Dog and Cat. Both Dog and Cat can be treated as Animals.
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Q5. Differences between heap and stack memory
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Heap memory is used for dynamic memory allocation, while stack memory is used for static memory allocation.
• Heap memory is used for storing objects and is managed by the JVM, while stack memory is used for storing method calls and local variables.

• Heap memory is larger in size compared to stack memory.

• Objects stored in heap memory can be accessed globally, while variables in stack memory are only accessible within the sc...read more
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Q1. SQL, API's, documentation,
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Q2. Working of Postman, jira, scrum(very important)
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Q3. Sprint, backlog refinement, all rules of scrum
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Payments app documentation

Q1. Difference between Controller and Rest Controller
Ans. 
A Controller is used for handling requests in a web application, while a Rest Controller specifically handles RESTful requests.
• A Controller is a component in the MVC architecture that handles user requests and returns a response.

• A Rest Controller is a specialized type of Controller that is used for handling RESTful requests.

• Rest Controllers are typically used in web services to handle HTTP requests and return JSON or X...read more
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Q2. Use of application.properties file
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The application.properties file is used to store configuration settings for a Java application.
• It is a key-value pair file where each line represents a configuration setting.

• It is commonly used in Spring Boot applications to configure various properties such as database connection details, server port, logging levels, etc.

• The file is typically located in the src/main/resources directory of the project.

• Properties can be...read more
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Q3. Questions on serialization
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Q4. Questions on stream()
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Q5. Questions on collection and collections()
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45 mins and very good

Q1. Enhanced version of level 1
Ans. 
The enhanced version of level 1 involves more complex tasks and challenges.
• Implement additional features to improve functionality

• Optimize code for better performance

• Enhance user interface for improved user experience
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Q2. Some string operation some series
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Q3. Coding exercises
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Q1. Family and job profile
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Q2. Friendly HR level
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Q3. General question
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