Cognizant Associate Engineer Interview Questions, Process, and Tips

Q1. What is mul key in db?
Ans. 
A multi key in a database is a key that consists of multiple columns, used to uniquely identify a record in a table.
• A multi key is created by combining two or more columns in a table.

• It is used to ensure uniqueness and improve query performance.

• Example: a multi key combining 'first_name' and 'last_name' columns in a 'users' table.
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Q2. Explain over riding and over loading
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Overriding is when a subclass provides a specific implementation of a method that is already provided by its parent class, while overloading is when a class has multiple methods with the same name but different parameters.
• Overriding involves a subclass providing a specific implementation of a method from its parent class.

• Overloading involves a class having multiple methods with the same name but different parameters.

• In...read more
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Q3. Explain factory design pattern with code
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Factory design pattern is a creational pattern that provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created.
• Factory design pattern involves creating an interface (or abstract class) for creating objects, and letting subclasses decide which class to instantiate.

• It helps in creating objects without exposing the instantiation logic to the client a...read more
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Q1. Why changing the job?
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Q2. What is your Expected salary?
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Java SQL

Q1. Oops concept from java
Ans. 
Oops concept from java
• Object-oriented programming paradigm

• Encapsulation, Inheritance, Polymorphism, Abstraction

• Classes and Objects

• Access Modifiers

• Example: Class Car with properties like make, model, year and methods like start, stop, accelerate

• Example: Inheritance - Class SUV extends Car with additional property like off-road capability
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1 Appetite test check the general knowledge and analysis skills

It will based experience coding questions will asked

Q1. It will be salary discussion round
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Q1. Programming questions
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Q1. Salary negotiation
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Logical reasoning, Analytical thinking, Aptitude

Was asked to write a few java programs that are basic

Q1. Tell me about your self
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Q2. Will you be able to relocate
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