DotPe SDE Interview Questions and Answers

Remove duplicates from a linked list

• Traverse the linked list and keep track of seen values using a hash set

• If a value is already in the hash set, remove the duplicate node

• Update the next pointers accordingly

Validate if an IP address is in a valid format

• Split the IP address into 4 parts using the dot as a delimiter

• Check if each part is a number between 0 and 255

• Ensure there are exactly 4 parts in the IP address