UNIT - I Introduction to Data Structures : abstract data types, Linear list – singly linked list implementation, insertion, deletion and searching operations on linear list, Stacks-Operations, array and linked representations of stacks, stack applications, Queues-operations, array and linked representations. (Chapter - 1) UNIT - II Dictionaries : linear list representation, skip list representation, operations - insertion, deletion and searching. Hash Table Representation : hash functions, collision resolution-separate chaining, open addressing-linear probing, quadratic probing, double hashing, rehashing, extendible hashing. (Chapter - 2) UNIT - III Search Trees : Binary Search Trees, Definition, Implementation, Operations- Searching, Insertion and Deletion, AVL Trees, Definition, Height of an AVL Tree, Operations – Insertion, Deletion and Searching, Red –Black, Splay Trees. (Chapter - 3) UNIT - IV Graphs : Graph Implementation Methods. Graph Traversal Methods. Sorting : Heap Sort, External Sorting- Model for external sorting, Merge Sort. (Chapter - 4) UNIT - V Pattern Matching and Tries : Pattern matching algorithms-Brute force, the Boyer - Moore algorithm, the Knuth-Morris-Pratt algorithm, Standard Tries, Compressed Tries, Suffix tries. (Chapter - 5)