Hunter retweeted
Complete DSA Roadmap
|-- Basic_Data_Structures
| |-- Arrays
| |-- Strings
| |-- Linked_Lists
| |-- Stacks
| └─ Queues
|
|-- Advanced_Data_Structures
| |-- Trees
| | |-- Binary_Trees
| | |-- Binary_Search_Trees
| | |-- AVL_Trees
| | └─ B-Trees
| |
| |-- Graphs
| | |-- Graph_Representation
| | | |- Adjacency_Matrix
| | | └ Adjacency_List
| | |
| | |-- Depth-First_Search
| | |-- Breadth-First_Search
| | |-- Shortest_Path_Algorithms
| | | |- Dijkstra's_Algorithm
| | | └ Bellman-Ford_Algorithm
| | |
| | └─ Minimum_Spanning_Tree
| | |- Prim's_Algorithm
| | └ Kruskal's_Algorithm
| |
| |-- Heaps
| | |-- Min_Heap
| | |-- Max_Heap
| | └─ Heap_Sort
| |
| |-- Hash_Tables
| |-- Disjoint_Set_Union
| |-- Trie
| |-- Segment_Tree
| └─ Fenwick_Tree
|
|-- Algorithmic_Paradigms
| |-- Brute_Force
| |-- Divide_and_Conquer
| |-- Greedy_Algorithms
| |-- Dynamic_Programming
| |-- Backtracking
| |-- Sliding_Window_Technique
| |-- Two_Pointer_Technique
| └─ Divide_and_Conquer_Optimization
| |-- Merge_Sort_Tree
| └─ Persistent_Segment_Tree
|
|-- Searching_Algorithms
| |-- Linear_Search
| |-- Binary_Search
| |-- Depth-First_Search
| └─ Breadth-First_Search
|
|-- Sorting_Algorithms
| |-- Bubble_Sort
| |-- Selection_Sort
| |-- Insertion_Sort
| |-- Merge_Sort
| |-- Quick_Sort
| └─ Heap_Sort
|
|-- Graph_Algorithms
| |-- Depth-First_Search
| |-- Breadth-First_Search
| |-- Topological_Sort
| |-- Strongly_Connected_Components
| └─ Articulation_Points_and_Bridges
|
|-- Dynamic_Programming
| |-- Introduction_to_DP
| |-- Fibonacci_Series_using_DP
| |-- Longest_Common_Subsequence
| |-- Longest_Increasing_Subsequence
| |-- Knapsack_Problem
| |-- Matrix_Chain_Multiplication
| └─ Dynamic_Programming_on_Trees
|
|-- Mathematical_and_Bit_Manipulation_Algorithms
| |-- Prime_Numbers_and_Sieve_of_Eratosthenes
| |-- Greatest_Common_Divisor
| |-- Least_Common_Multiple
| |-- Modular_Arithmetic
| └─ Bit_Manipulation_Tricks
|
|-- Advanced_Topics
| |-- Trie-based_Algorithms
| | |-- Auto-completion
| | └─ Spell_Checker
| |
| |-- Suffix_Trees_and_Arrays
| |-- Computational_Geometry
| |-- Number_Theory
| | |-- Euler's_Totient_Function
| | └─ Mobius_Function
| |
| └─ String_Algorithms
| |-- KMP_Algorithm
| └─ Rabin-Karp_Algorithm
|
|-- OnlinePlatforms
| |-- LeetCode
All the best
Freshers hub!!
Hunter retweeted
- found the best gf
- got a job at 21 (25+ LPA, fintech)
- met Javed Akhtar he loved my shayari🤪
- investments hit multiple 6 figures
- travelled on my own
- worked with NASA
- bought all gadgets of convenience 🙏
- got one of the best credit cards in 🇮🇳
- stopped 🚬🥃
Hunter retweeted
Singleton is one of the favorite topics of Java interviewers.
Cover these 20 questions, and you don't have to worry about Singletons anymore 👇
1. Implement a basic Singleton class in Java.
2. Explain the difference between lazy and eager initialization in Singleton.
3. What is double-checked locking, and how does it work in Singleton?
4. Explain the Bill Pugh Singleton design. Why is it considered the best approach?
5. Can you implement a Singleton using synchronized methods? What are the downsides?
6. How does the volatile keyword help in a thread-safe Singleton implementation?
7. How can Singleton break during serialization? How do you prevent it?
8. When do you use the readResolve() method in Singleton ?
9. How does reflection break the Singleton pattern?
10. Can Enum be used to implement Singleton in Java? Why is Enum considered the most robust way to implement Singleton? What are the pros and cons of Enum-based Singleton?
11. Is Singleton suitable for distributed systems (e.g., microservices)? Why or why not?
12. How do Singleton patterns interact with garbage collection in Java?
13. How can multiple class loaders break the Singleton pattern?
14. How can you use Singleton in dependency injection frameworks like Spring?
15. Design a thread-safe Singleton for a logging utility.
16. How would you use Singleton in a database connection pool?
17. Explain when Singleton might become an anti-pattern.
18. If two JVMs are running the same Singleton class, will they share the same instance? Why?
19. Implement a Singleton for a configuration settings manager.
20. Compare Singleton with Static classes: when to use which?
