6 Questions
What is the primary advantage of using a linked list over an array?
Dynamic memory allocation: nodes can be added or removed as needed
What is the time complexity of searching for an element in a linked list?
O(n) in the worst case
What is the main difference between a singly linked list and a doubly linked list?
A doubly linked list has references to both the previous and next nodes, while a singly linked list only has a reference to the next node
What is the purpose of the enqueue operation in a queue?
To add an element to the end of the queue
What is the primary advantage of using a circular queue over a linear queue?
A circular queue can wrap around to the beginning when the end is reached, allowing for more efficient use of memory
What is the primary purpose of a priority queue?
To order elements based on their priority, with the highest-priority element at the front
Study Notes
Linked Lists
- A data structure in which a sequence of nodes are linked together through pointers
- Each node contains a value and a reference (i.e., a "link") to the next node in the sequence
- Advantages:
- Dynamic memory allocation: nodes can be added or removed as needed
- Efficient insertion and deletion operations
- Disadvantages:
- Slow search time (O(n) in the worst case)
- More complex implementation compared to arrays
- Types of linked lists:
- Singly linked list: each node only has a reference to the next node
- Doubly linked list: each node has references to both the previous and next nodes
- Circularly linked list: the last node points back to the first node
Queues
- A First-In-First-Out (FIFO) data structure
- Elements are added to the end of the queue (enqueue) and removed from the front of the queue (dequeue)
- Operations:
- Enqueue: add an element to the end of the queue
- Dequeue: remove the element from the front of the queue
- Peek: look at the element at the front of the queue without removing it
- Types of queues:
- Linear queue: a simple queue with a fixed maximum size
- Circular queue: a queue that wraps around to the beginning when the end is reached
- Priority queue: elements are ordered based on their priority, with the highest-priority element at the front
Linked Lists
- A linked list is a dynamic data structure where a sequence of nodes are linked together through pointers.
- Each node in a linked list contains a value and a reference (or "link") to the next node in the sequence.
- Linked lists have advantages, including:
- Dynamic memory allocation, allowing nodes to be added or removed as needed.
- Efficient insertion and deletion operations.
- However, linked lists also have disadvantages, including:
- Slow search time, with a worst-case time complexity of O(n).
- More complex implementation compared to arrays.
- There are several types of linked lists, including:
- Singly linked lists, where each node only has a reference to the next node.
- Doubly linked lists, where each node has references to both the previous and next nodes.
- Circularly linked lists, where the last node points back to the first node.
Queues
- A queue is a First-In-First-Out (FIFO) data structure.
- Elements are added to the end of the queue (enqueue) and removed from the front of the queue (dequeue).
- Queue operations include:
- Enqueue: adding an element to the end of the queue.
- Dequeue: removing the element from the front of the queue.
- Peek: looking at the element at the front of the queue without removing it.
- There are several types of queues, including:
- Linear queues, which are simple queues with a fixed maximum size.
- Circular queues, which wrap around to the beginning when the end is reached.
- Priority queues, where elements are ordered based on their priority, with the highest-priority element at the front.
Understand the basics of linked lists, their advantages and disadvantages, and types of linked lists. Learn about dynamic memory allocation, efficient insertion and deletion operations, and more.
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