Linked lists

What does each node in a singly linked list typically store?

• A value and a reference to the previous node.

• A value and a reference to the next node.

• Only a value.

• Only a reference to the next node.

How do you access the 10th element in a singly linked list?

• Directly access it using its index.

• Start from the head and follow the links nine times.

• Start from the tail and follow the links nine times backward.

• It is not possible to access a specific element in a linked list.

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What is the primary difference when adding a new element in the middle of a singly linked list compared to an array?

• In a linked list, you must shift all subsequent elements, while in an array, you only update pointers.

• In a linked list, you only need to update a few pointers, while in an array, you must shift subsequent elements.

• Both require shifting all subsequent elements.

• Both only require updating a few pointers.

What is the time complexity for inserting a node into a linked list, given that the insertion point has already been identified?

• O(1)

• O(n)

• O(log n)

• O(n^2)

How does a doubly linked list differ from a singly linked list?

• It stores nodes in contiguous memory.

• Each node contains pointers to both the next and previous nodes.

• It only allows traversal in one direction.

• It has faster search times than a singly linked list.