Siksha Sarovar

Siksha Sarovar (sikshasarovar.com) is a free educational web application that helps students in India learn programming and prepare for academic and competitive exams. The platform offers structured coding courses (C, C++, Python, Java, HTML, CSS, PHP, Power BI, AI, Machine Learning, Data Science), complete university curriculum notes for BCA/MCA students with previous year question papers, Class 10 and Class 12 CBSE/HBSE school notes, and dedicated preparation material for SSC, UPSC, Banking, Railway and other government exams. Browsing the site is completely free and requires no account. Users may optionally sign in with Google solely to save their learning progress, quiz scores and personal preferences across devices.

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Siksha Sarovar is a free e-learning platform for coding courses, BCA university notes and competitive exam preparation. Optional Google sign-in saves your learning progress across devices.

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Free Data Structures & Algorithms Notes for BCA/MCA 2026 — Arrays to Graphs

Data Structures and Algorithms (DSA) is the single most important subject for placement preparation. Every major IT company — from TCS and Infosys to Microsoft and Amazon — evaluates DSA skills in their technical rounds. For BCA and MCA students, DSA is also a high-weightage university subject typically in the second or third semester.

Topics covered in the Data Structures notes

  • Arrays & Strings: 1D and 2D arrays, string manipulation, sliding window, two-pointer techniques.
  • Linked Lists: singly linked list, doubly linked list, circular linked list, reversal, cycle detection (Floyd's algorithm).
  • Stacks & Queues: array and linked-list implementations, applications (balanced parentheses, expression evaluation, BFS).
  • Trees: binary trees, BST, AVL trees, traversals (inorder, preorder, postorder, level-order), heap and priority queues.
  • Graphs: adjacency matrix and list representations, BFS, DFS, shortest path (Dijkstra, Bellman-Ford), minimum spanning tree (Kruskal, Prim).
  • Sorting & Searching: bubble, selection, insertion, merge, quick, heap sort; binary search and its variants.
  • Hashing: hash functions, chaining, open addressing, load factor.

Why DSA is critical for placements

Service companies (TCS, Wipro, Cognizant) test DSA in aptitude + coding rounds. Product companies (Google, Amazon, Flipkart, Paytm, Razorpay) test medium-to-hard DSA problems on platforms like HackerRank, CodeSignal, and HackerEarth. Without solid DSA foundations, students fail these rounds regardless of their CGPA or project portfolio.

Practice resources on the platform

The Data Structures course includes worked examples in C, Java and Python. Every algorithm is runnable in the online compilerwith custom input. Pair these notes with the C Programming course if you are just starting out — implementing DSA in C teaches you pointer and memory management that makes you a stronger developer in any language.

Start with the free Data Structures notes— begin with arrays and complexity analysis, and work through to graphs in 30 days.