ProminentPixel Interview Questions and Answers

Runtime polymorphism is the ability of a function to behave differently based on the object it is called with.

• Runtime polymorphism is achieved through method overriding in object-oriented programming.

• It allows a subclass to provide a specific implementation of a method that is already provided by its superclass.

• The actual method that gets called is determined at runtime based on the type of object.

• Example: Inheritance ...read more

Abstraction is the concept of hiding complex implementation details and showing only the necessary information to the user.

• Abstraction allows developers to focus on the essential features of an object while hiding unnecessary details.

• It helps in reducing complexity and improving the efficiency of the code.

• For example, a car can be abstracted as a vehicle with properties like speed, fuel consumption, and color, without ...read more

Code to find duplicates in an array of strings

• Iterate through the array and store each element in a HashSet

• If an element is already in the HashSet, it is a duplicate

• Return a list of duplicates found

Hashing is a process of converting input data into a fixed-size string of bytes using a hash function.

• Hashing is used to securely store passwords by converting them into a hash value.

• Hashing is used in data retrieval systems to quickly locate data based on a key.

• Common hash functions include MD5, SHA-1, and SHA-256.