Cognizant Software Trainee Interview Questions and Answers for Experienced

Interview preparation tips for other job seekers - Good understanding of Data structures and Strong knowledge in basics of programming is the key to crack the interview

Interview preparation tips for other job seekers - Dividing programs into class or objects is called oops .
Oops are classified into following types they are:
1)class:
Class is template from which objects are created. Collection of objects is called object.It is logical Entity
2. Object :
It is an instance of class. It has some states and behaviour. It is both physical and logical Entity .
3. Abstraction:
Hiding the implementation part and showing the functionality is called Abstraction.
Ex:sending SMS where we type text but don't the internal working.
Abstraction can be achieved by
Abstract classes and interfaces
4.Encapuslation:
Binding up of code and data or Variables and methods together is called Encapsulation
Ex: capsule different medicines are binded in it
We can achieve it by getter and setter methods
5) polymorphism:
Performing the same task in different ways is called polymorphism
It can be achieved by method over loading complie time polymorphism and run time polymorphism method overriding.
a) method overloading:
Same method name but different parameters is known as method overloading
b) method overriding:
Same method name & same parameters in sub class and super class is called method overriding.
6.Inheritance:
Acquiring properties from one class to another class is called inheritance
1) single inheritance :
Single child class inherits characteristics of single parent class
Multilevel inheritance
2) for example, a Child inherits behavior from his father, and the father has inherited characteristics from his father.
3) hierarchical inheritance:
One class is inherited by multiple subclasses
4) multiple inheritance:
One class inherits features of more than one base class and is not supported in Java, but the class can implement more than one interface.
5)Hybrid Inheritance: This is a combination of single and multiple inheritances.

7)

Interview preparation tips for other job seekers - Focus on body language.
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Interview preparation tips for other job seekers - Mostly asked basic questions of Java, spring boot, micro service, SQL queries