Pine Labs Interview Questions, Process, and Tips for Experienced

Reversing a linked list in O(N) involves iterating through the list and reversing the pointers of each node.

• Initialize three pointers: prev (null), current (head), and next (null).

• Iterate through the linked list until current is null.

• In each iteration, store the next node: next = current.next.

• Reverse the current node's pointer: current.next = prev.

• Move prev and current one step forward: prev = current; current = next.

• O...read more

Dependency Injection is a design pattern that allows a program to achieve Inversion of Control by injecting dependencies into a class.

• Promotes loose coupling between classes.

• Enhances testability by allowing mock dependencies.

• Can be implemented using frameworks like Spring.

• Example: Instead of a class creating its own dependencies, they are provided externally.

• Facilitates easier maintenance and scalability of code.