Tree Traversal • Many different algorithms for manipulating trees exist, but these algorithms have in common that they systematically visit all the nodes in the tree. • There are essentially two methods for visiting all nodes in a tree: • Depth-first traversal, • Breadth-first traversal. 373 © Dr Markus Lumpe, 2021 Depth-first Traversal • Pre-order […]
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Data Structures – Basic Concepts Overview • Programming Paradigms • Values, Sets, and Arrays • Indexer, Iterators, and Pattern Structures References • Bruno R. Preiss: Data Structures and Algorithms with Object-Oriented Design Patterns in C++. John Wiley & Sons, Inc. (1999) • Richard F. Gilberg and Behrouz A. Forouzan: Data Structures – A Pseudocode Approach
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Recursion, Linked Lists, and ADTs Overview • Recursion • Singly-Linked Lists • Abstract Data Types References • Bruno R. Preiss: Data Structures and Algorithms with Object-Oriented Design Patterns in C++. John Wiley & Sons, Inc. (1999) • Richard F. Gilberg and Behrouz A. Forouzan: Data Structures – A Pseudocode Approach with C. 2nd Edition. Thomson
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Memory Management and Copy Control Overview • Types of memory • Copy constructor, assignment operator, and destructor • Reference counting with smart pointers References • Stanley B. Lippman, Josée Lajoie, and Barbara E. Moo: C++ Primer. 4th Edition. Addison-Wesley (2006) • Bruno R. Preiss: Data Structures and Algorithms with Object-Oriented Design Patterns in C++. John
csce411-graphs6 The Bellman-Ford Algorithm Andreas Klappenecker Single Source Shortest Path Problem Given a graph G=(V,E), a weight function w: E -> R, and a source node s, find the shortest path from s to v for every v in V. ! We allow negative edge weights. G is not allowed to contain cycles of negative
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Systems II Midterm 2 Exam Key Concepts The following list is not necessarily all the points we covered, but these points are important ones. 9_Threads What factors lead to increased concurrency in applications since about 2005? What two options/approaches are covered in the class slides for building concurrent applications? What are the advantages and disadvantages
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[537] Threads Concurrency: Locks Questions answered in this lecture: Review threads and mutual exclusion for critical sections How can locks be used to protect shared data structures such as linked lists? Can locks be implemented by disabling interrupts? Can locks be implemented with loads and stores? Can locks be implemented with atomic hardware instructions? Are
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Disk Queuing Problem Assumptions: To simplify things, we will suppose that the disk has only one platter with tracks on a single side, and that requests are given by track number [which is equal to cylinder number] (thus, we will ignore rotational latency, which can be approximated with the average value, but we will not
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Chapter 7 Storage Systems 2 • Magnetic Storage is a popular storage format for storing large amounts of data. • Common formats – Hard drives • Spinning magnetizable discs store data • Can be read randomly – Tape drives • Magnetizable tapes store data • Can only be read sequentially 7.6 Magnetic Disk Technology 3
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Announcements Persistence: I/O devices Reading: Chapters 35, 36 and 37 Questions answered in this lecture: How does the OS interact with I/O devices (check status, send data+control)? What is a device driver? What are the components of a hard disk drive? How can you calculate sequential and random throughput of a disk? What algorithms are
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