Dimension Data Technical Lead Interview Questions and Answers

OOPs concepts are used in real life to model objects and their behavior.

• Encapsulation: A car's engine is encapsulated and can only be accessed through specific methods.

• Inheritance: A sports car is a type of car that inherits properties and methods from the car class.

• Polymorphism: A person can be a student, teacher, or employee, each with their own unique behavior.

• Abstraction: A TV remote has buttons that abstract the c...read more

Hashmap is a data structure that stores key-value pairs and uses hashing to locate values based on their keys.

• Hashmap uses an array of linked lists to store key-value pairs.

• The hash function is used to convert the key into an index of the array.

• If two keys have the same hash value, they are stored in the same linked list.

• Hashmap provides constant time complexity for insertion, deletion, and retrieval of values.

• Java's H...read more

Stock split is a corporate action where a company increases the number of its outstanding shares by dividing each share into multiple shares.

• Stock split is done to make shares more affordable for investors and increase liquidity.

• There are different types of stock splits such as 2-for-1, 3-for-1, etc.

• Other types of corporate actions include mergers, acquisitions, spin-offs, and dividend payments.

• Corporate actions can af...read more