DSA · Theory

Delete all occurrences of a given key in a linked list

Theory

533/810

Delete all occurrences of a given key in a linked list

Delete all occurrences of a given key in a linked list 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 Delete all occurrences of a given key in a linked list.

From the example next to this theory: Delete all occurrences of a given key in a linked list — a linked list chains nodes with next pointers instead of contiguous indexes.

Trap — losing the next pointer on delete. Fix that before you talk about advanced DSA.

Viva — what is Delete all occurrences of a given key in a linked list? Then show head → next → …. Then name the trap.

Diagram

  [10] → [20] → [30] → /
   head              tail

Exam tip

What is Delete all occurrences of a given key in a linked list? Show this: head → next → …. Trap: losing the next pointer on delete.

Example

class Node:
    def __init__(self, val, next=None):
        self.val = val
        self.next = next

head = Node(1, Node(2, Node(3)))
cur = head
while cur:
    print(cur.val, end=" -> " if cur.next else "\n")
    cur = cur.next

Delete all occurrences of a given key in a linked list — a linked list chains nodes with next pointers instead of contiguous indexes.

Short notes

DefDelete all occurrences of a given key in a linked list — a ticket queue node in a counter.
Rulehead → next → …
Traplosing the next pointer on delete
Usea counter

Delete all occurrences of a given key in a linked list — DSA Technical Interview Questions & Answers

Delete all occurrences of a given key in a linked list

Delete all occurrences of a given key in a linked list 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 Delete all occurrences of a given key in a linked list.
From the example next to this theory: Delete all occurrences of a given key in a linked list — a linked list chains nodes with next pointers instead of contiguous indexes.
Trap: losing the next pointer on delete. Fix that before you talk about advanced DSA.
Viva: what is Delete all occurrences of a given key in a linked list? Then show head → next → …. Then name the trap.

Technical Interview Tip: What is Delete all occurrences of a given key in a linked list? Show this: head → next → …. Trap: losing the next pointer on delete.

Code Examples for Delete all occurrences of a given key in a linked list

Delete all occurrences of a given key in a linked list — working example

class Node:
    def __init__(self, val, next=None):
        self.val = val
        self.next = next

head = Node(1, Node(2, Node(3)))
cur = head
while cur:
    print(cur.val, end=" -> " if cur.next else "\n")
    cur = cur.next

Delete all occurrences of a given key in a linked list — a linked list chains nodes with next pointers instead of contiguous indexes.

How to Explain Delete all occurrences of a given key in a linked list to an Interviewer

What is Delete all occurrences of a given key in a linked list?

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

Give one small example of Delete all occurrences of a given key in a linked list.

head → next → … Delete all occurrences of a given key in a linked list — a linked list chains nodes with next pointers instead of contiguous indexes

What mistake do beginners make with Delete all occurrences of a given key in a linked list?

losing the next pointer on delete Show the fix

Where do you use Delete all occurrences of a given key in a linked list?

a counter a ticket queue node

Delete all occurrences of a given key in a linked list — DSA Interview Questions

Delete all occurrences of a given key in a linked list

Delete all occurrences of a given key in a linked list 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 Delete all occurrences of a given key in a linked list.

From the example next to this theory: Delete all occurrences of a given key in a linked list — a linked list chains nodes with next pointers instead of contiguous indexes.

Trap: losing the next pointer on delete. Fix that before you talk about advanced DSA.

Viva: what is Delete all occurrences of a given key in a linked list? Then show head → next → …. Then name the trap.

Interview Tip: What is Delete all occurrences of a given key in a linked list? Show this: head → next → …. Trap: losing the next pointer on delete.

DSA · Theory

Delete all occurrences of a given key in a linked list

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Theory

533/810

Delete all occurrences of a given key in a linked list

Delete all occurrences of a given key in a linked list 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 Delete all occurrences of a given key in a linked list.

From the example next to this theory: Delete all occurrences of a given key in a linked list — a linked list chains nodes with next pointers instead of contiguous indexes.

Trap — losing the next pointer on delete. Fix that before you talk about advanced DSA.

Viva — what is Delete all occurrences of a given key in a linked list? Then show head → next → …. Then name the trap.

Diagram

  [10] → [20] → [30] → /
   head              tail

Exam tip

What is Delete all occurrences of a given key in a linked list? Show this: head → next → …. Trap: losing the next pointer on delete.

Example

class Node:
    def __init__(self, val, next=None):
        self.val = val
        self.next = next

head = Node(1, Node(2, Node(3)))
cur = head
while cur:
    print(cur.val, end=" -> " if cur.next else "\n")
    cur = cur.next

Delete all occurrences of a given key in a linked list — a linked list chains nodes with next pointers instead of contiguous indexes.

Short notes

DefDelete all occurrences of a given key in a linked list — a ticket queue node in a counter.
Rulehead → next → …
Traplosing the next pointer on delete
Usea counter