Computer Systems Concurrency & Threads A view of an operating System Slide #2 of 35 What does this imply? Multiple ‘users’ Working independently The operating system: Protects memory from interference from other processes Interleaves execution of each process to: Maximise resource utilisation Responsiveness of each process Preserves the states of each process so it can […]
Computer Systems Application Layer Dr. Mian M. Hamayun m.m.hamayun@bham.ac.uk Based on material and slides from Computer Networking: A Top Down Approach, 7th Edition – Chapter 2 Jim Kurose, Keith Ross Pearson/Addison Wesley Lecture Objective The objective of this lecture is to understand the conceptual and implementation aspects of network application protocols Slide #2 of 57
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Computer Systems Topic – JVM and Java Bytecode Dr. Mian M. Hamayun M.M.Hamayun@cs.bham.ac.uk Credits to: Ata Kaban & Steve Vickers Lecture Objectives Develop a basic understanding how Java Virtual Machine works and what is bytecode Understand the role of stack frames in method Calls Understand the mapping of high-level Java code to low level Bytecode
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Computer Systems Week 3 (part 1) Compilation, Interpretation & Overview of Java Virtual Machine Lecture Objective To introduce the basic concepts of compilation, interpretation and Java Virtual Machine. Slide #2 of 38 Lecture Outline u Levels of Programming Languages u High Level to Low Level Translation u High Level Program Execution u Compilation vs. Interpretation
Elements of an Operating System Lecture Objective / Overview In this lecture, we shall see: uWhat happens when your computer starts uThe role of memory in a computer system uHow an OS manages multitasking Slide #2 of 25 Starting your Computer … u A small bootstrap program is loaded when your computer is started or
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Computer Systems Topic – Subroutines and Stacks Dr. Mian M. Hamayun M.M.Hamayun@cs.bham.ac.uk Credits to: Ata Kaban & Steve Vickers Lecture Objectives To introduce the fundamentals concepts of subroutines and how they are implemented using stacks. Slide #2 of 43 Lecture Outline How a Subroutine Works? Call / Return Instructions Introduction to Stacks Saving
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Operating System Structures & User Interface Lecture Objective / Overview In this lecture, we shall see: uOperating System Services uSystem Calls / OS Relationship uOS Design and Implementation uOperating System Structure uUser Classes & Interfaces Slide #2 of 38 What is part of an Operating System? u When you install an OS, what do you
FORMAT STRING ATTACK Martin Read Lecture aim Introduction to format string attack Lecture Objectives 1. What happens when formatting of data allows attackers to control the data? 2. Example programmes … • Practical next week Nothing is Secure • Finding the vulnerability & fixing it will increase the quality & efficiency of software • Every
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CSRF Lab-02 1 Cross-Site Request Forgery (CSRF) Attack Lab (Web Application: Elgg) 1 Overview The objective of this lab is to help students understand the Cross-Site Request Forgery (CSRF) attack. A CSRF attack involves a victim user, a trusted site, and a malicious site. The victim user holds an active session with a trusted site
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SEC204 1 Computer Architecture and Low Level Programming Dr. Vasilios Kelefouras Email: v.kelefouras@plymouth.ac.uk Website: https://www.plymouth.ac.uk/staff/vasilios -kelefouras School of Computing (University of Plymouth) Date 28/10/2019 2 Von Neumann architecture What is the CPU? How CPU works? • Arithmetic Logic Unit (ALU) • Control Unit (CU) • Bus • Memory • Registers • Clock
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