Merge Two Sorted Linked Lists — DSA Technical Interview Questions & Answers

Merge Two Sorted Linked Lists

Merge Two Sorted Linked Lists

  • Merge Two Sorted Linked Lists is a DSA topic. In plain words you use it for a ticket queue node in a counter. Don’t start with a slogan — start with that picture.
  • Smallest example: head → next → …. Type it, run it, and say what you see. If you can do that from memory, you know Merge Two Sorted Linked Lists.
  • From the example next to this theory: Merge Two Sorted Linked Lists: dry-run [4, 1, 3].
  • Trap: losing the next pointer on delete. Fix that before you talk about advanced DSA.
  • Viva: what is Merge Two Sorted Linked Lists? Then show head → next → …. Then name the trap.

Technical Interview Tip: What is Merge Two Sorted Linked Lists? Show this: head → next → …. Trap: losing the next pointer on delete.

Code Examples for Merge Two Sorted Linked Lists

Merge Two Sorted Linked Lists — working example

# Merge Two Sorted Linked Lists
data = [4, 1, 3]
print("start", data)
if data[0] > data[1]:
    data[0], data[1] = data[1], data[0]
print("after one step", data)

Merge Two Sorted Linked Lists: dry-run [4, 1, 3]. Say the list after one step.

How to Explain Merge Two Sorted Linked Lists to an Interviewer

What is Merge Two Sorted Linked Lists?

Used for a ticket queue node a counter Not just the heading

Give one small example of Merge Two Sorted Linked Lists.

head → next → … Merge Two Sorted Linked Lists: dry-run [4, 1, 3]

What mistake do beginners make with Merge Two Sorted Linked Lists?

losing the next pointer on delete Show the fix

Where do you use Merge Two Sorted Linked Lists?

a counter a ticket queue node