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lec1-2 - CS I S C363 D a ta Str uctur es Al gor i thms...

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Click to edit Master subtitle style 2/7/11 CS/IS C363 DS&A - Sundar B. CSIS BITS, Pilani Introduction: Data Abstraction Data Modeling Abstraction Data Abstraction, Representation Abstract Data Types Course Motivation Administrivia CS / I S C363 Data Structures & Algorithms 11
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2/7/11 CS/IS C363 DS&A - Sundar B. CSIS BITS, Pilani Course Motivation Solving Problems Requires writing Programs (“Concrete solutions”) A program typically solves one specific problem i.e. for a class of inputs Solution may depend on specific platform Writing Programs Requires designing Algorithms (“abstract solutions”) An algorithm may solve a class of problems Solution not dependent on specific language/platform 22
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2/7/11 CS/IS C363 DS&A - Sundar B. CSIS BITS, Pilani Administrivia 3 lectures and 1 lab (3 hours) per week All Evaluation components are open book 2 Written Tests (2x30=60 marks ) Comprehensive Exam (60 marks i.e. 30%) Lab sessions Total weight (evaluation): 80 marks (i.e. 40%) Labs are open book Structured as Assisted sessions (i.e. with instructor’s help) Each session carries 4 marks 33
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2/7/11 CS/IS C363 DS&A - Sundar B. CSIS BITS, Pilani ADMINISTRIVIA Lab Sessions: Focus on implementation of algorithms Implementation Techniques Performance Evaluation of algorithms / implementations Emphasis on completion Marking will depend on executable (parts of the) code: Advice: Learn incremental development 44
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2/7/11 CS/IS C363 DS&A - Sundar B. CSIS BITS, Pilani Data Modeling Solving Problems Requires writing Programs Requires designing Algorithms Requires structuring of data Requires understanding of data What kind of data? Input or Output data Census Records ==> Unique IDs List/Set, Tuples, Ordering, and Keys Computational data 55
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2/7/11 CS/IS C363 DS&A - Sundar B. CSIS BITS, Pilani Data Modeling Goal: Understand Data (related to the problem being solved) and capture essentials as a model Purpose of Modeling: Abstraction (that leads to) Design e.g. architect’s model in clay, wood, blueprints Principles/Techniques: Capture essentials Ignore details (that are irrelevant) E.g. History in command shells (Unix/Linux) 66
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2/7/11 CS/IS C363 DS&A - Sundar B.
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