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The video contains following parts
0:000:18 Recap
0:181:18 Intro
1:183:00 RAM Vs Hard Disk
3:005:30 How Dard Disk works
5:308:50 Time taken to find in 1 million records
8:5010:30 Educosys
10:3018:15 Optimisation using Index Table
18:1520:25 Multilevel Indexing
20:2521:10 BTree Visualisation
21:1028:10 Complexity Comparison of BSTs, Arrays and BTrees
28:1031:00 Structure of BTree
31:0037:45 Characteristics of BTrees
37:4539:10 BTrees Vs B+ Trees
39:1039:35 Coming up in next video
39:3540:22 Please subscribe!

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