Linked List and Stack Quiz

What does a node in a singly linked list contain?

• Data and pointer to previous node

• Data and pointer to next node

• Only data

• Only pointer

What is the head in a singly linked list?

• Last node

• First node

• Random node

• Middle node

How can you detect if a singly linked list is empty?

• If head is not None

• If head is equal to 0

• If head is None

• If head is a string

Which operation is used to add a node at the beginning?

• append

• prepend

• insert_front

• push_back

What happens when you try to delete from an empty list?

• Deletes head

• Crashes

• Error or Exception

• Does nothing

Which method is used to delete the first node?

• pop

• remove_first

• delete_first

• shift

What is printed if you try to print a node object without __str__ or __repr__?

• Node content

• Nothing

• Error

• Object memory location

Which pointer helps in reverse traversal?

• next

• None

• head

• prev

Which operation removes the top element?

• pop

• dequeue

• delete

• insert

What does peek() do in a stack?

• Clears stack

• Inserts element

• Returns top without removing

• Deletes element