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Day 100 - Linked List Cycle
How can we check if a linked list has a cycle in it? There’s a pretty clever way to do it - keep two pointers, one that moves forward by one node (blue), and one the moves forward by two nodes (black). If there’s a cycle, then the black node wrap around and “catch” the blue node. If the nodes never overlap, then there can’t be a cycle.
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Day 95 - Doubly Linked List
A doubly linked list is just a link list where each node has a pointer to both the next node and the previous node. Makes it possible to traverse the list from either end.
Day 94 - Linked List
A linked list is a classic data structure that connects nodes through points to the nodes after them. Unlike an array, you can’t just grab an element of a linked list by it’s index. They don’t have indices. Instead, you have to traverse the list until you find what you want. Same for inserting, you have to traverse all the way to the end to add a new node in. So what’s the point? It digs into technicalities a bit, but inserting and removing nodes from a linked list can be quite a bit faster than an array, since we don’t have to copy the entire list and move it somewhere else in memory.
Linked List in Java
Hey everyone!
If you're learning Java and getting into data structures, one concept you'll definitely come across is the Linked List. At first, it might seem a bit tricky compared to arrays, but once you understand how it works, it becomes a super handy tool in your coding journey.
So, what exactly is a linked list?
Think of it like a chain — each part of the chain is called a node. Every node holds some data (like a number or a word) and also keeps track of the next node in line. This way, all the nodes are connected one after the other.
Unlike arrays, linked lists don’t store elements in a fixed or continuous memory space. That makes them flexible — you can easily add or remove items without having to shift other elements around.
There are a few different types of linked lists:
Singly Linked List – each node points to the next one.
Doubly Linked List – nodes point both to the next and previous ones.
Circular Linked List – the last node connects back to the first.
One of the biggest reasons to use a linked list over an array is because it’s dynamic. You don’t need to define a fixed size at the beginning. It’s great for situations where the number of elements can change often.
If you're curious about how to create a linked list in Java, or want to practice with some examples, I recommend checking out this page: Linked List in Java
It explains the concept in a beginner-friendly way and includes simple Java code examples you can try out on your own.
Give it a go and start experimenting — it's a great step toward understanding how data structures work in real coding scenarios.
Test Your Knowledge: Quiz Challenge!!! 📝🧠
Which hashing technique is free from clustering?🤔
For more interesting quizzes, check the link below! 📚 https://bit.ly/42qN0sr
For the explanation of the right answer, you can check Q.No. 18 of the above link. 📖
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Test Your Knowledge: Quiz Challenge!!! 📝🧠
A dictionary has a set of ------- and each key has a single associated value.🤔
For more interesting quizzes, check the link below! 📚 https://bit.ly/42qN0sr
For the explanation of the right answer, you can check Q.No. 15 of the above link. 📖
Test Your Knowledge: Quiz Challenge!!! 📝🧠
Five node splitting operations occurred when an entry is inserted into a B-tree. Then how many nodes are written?🤔
For more interesting quizzes, check the link below! 📚 https://bit.ly/3XpXA1y
For the explanation of the right answer, you can check Q.No. 14 of the above link. 📖
Test Your Knowledge: Quiz Challenge!!! 📝🧠
If h is chosen from a universal collection of hash functions and is used to hash n keys into a table of size m,
where n ≤ m, the expected number of collisions involving a particular key x is less than _______.🤔
For more interesting quizzes, check the link below! 📚 https://bit.ly/3XpXA1y
For the explanation of the right answer, you can check Q.No. 13 of the above link. 📖
