Cognizant Test Professional Interview Questions and Answers

Q1. *Introduce yourself *Purpose of working in the Company *Educational Background *Family Background *Goals and Ambition
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Q1. What is Polymorphism and it’s type?
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Polymorphism is the ability of an object to take on many forms. It allows objects of different classes to be treated as if they were of the same class.
• Polymorphism is achieved through method overriding and method overloading.

• Method overriding is when a subclass provides a specific implementation of a method that is already provided by its parent class.

• Method overloading is when a class has two or more methods with the ...read more
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Q2. What is Dependency Injection?
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Dependency Injection is a design pattern where the dependencies of an object are injected into it rather than created within it.
• It helps in achieving loose coupling between objects

• It makes testing easier as dependencies can be mocked or stubbed

• There are three types of Dependency Injection - Constructor Injection, Setter Injection, and Interface Injection

• Example: In a web application, the database connection object can ...read more
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Q3. How Garbage Collection works in .Net?
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Garbage Collection in .Net automatically manages memory by freeing up unused objects.
• Garbage Collector runs in the background and periodically checks for unused objects.

• It frees up memory by deallocating objects that are no longer being used.

• GC can be configured using different modes like Server, Workstation, Concurrent, etc.

• GC can also be manually triggered using GC.Collect() method.

• GC.SuppressFinalize() method can be...read more
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Q4. What is LINQ and some basic concept related it?
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Q1. What is Data Structure?
Ans. 
Data structure is a way of organizing and storing data in a computer so that it can be accessed and used efficiently.
• Data structures are used to manage large amounts of data efficiently.

• They can be implemented using arrays, linked lists, trees, graphs, and other techniques.

• Examples include stacks, queues, hash tables, and binary search trees.

• Choosing the right data structure for a particular problem is important for op...read more
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Q2. Real time use of stack and Queue?
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Stack and Queue are used in real-time systems for managing tasks and events.
• Stack is used for managing function calls, undo/redo operations, and backtracking.

• Queue is used for managing events, scheduling tasks, and buffering data.

• Real-time systems use both data structures for managing tasks and events in a time-sensitive manner.

• Examples include task scheduling in operating systems, event handling in GUI applications, a
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Q1. .Net related technical questions
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Q1. Tell me about yourself.
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Q2. What are your strengths and weaknesses?
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Q3. What are your salary expectations?
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Discussion on any of the topic

Q1. About previous experience
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Q2. Challenges in previous job
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