Diff between abstract class and interface Difference between array and array list Difference between method overloading and overriding Pillars of oops Deadlock Normalisation

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Accepted Answer

Abstract class is a class with abstract methods, interface is a contract with only abstract methods. Array is fixed size, ArrayList is dynamic. Method overloading is same method with different parameters, overriding is redefining a method. OOP pillars are inheritance, encapsulation, polymorphism, abstraction. Deadlock is a situation where two or more processes are unable to proceed because each is waiting for the other to release a resource. Normalization is the process of organizing data in a database efficiently.

Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.
Array has a fixed size, while ArrayList can dynamically resize itself.
Method overloading is having multiple methods with the same name but different parameters, while method overriding is redefining a method in a subclass.
OOP pillars are Inheritance, Encapsulation, Polymorphism, and Abstraction.
Deadlock occurs when two or more processes are unable to proceed because each is waiting for the other to release a resource.
Normalization is the process of organizing data in a database efficiently by reducing redundancy and dependency.

Diff between abstract class and interface Difference between array and array list Difference between method overloading and overriding Pillars of oops Deadlock Normalisation

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