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FAMILY NAME: GIVEN NAMES: SIGNATURE: STUDENT NUMBER: SEMESTER 2, 2019 EXAMINATIONS Physics, Mathematics & Computing This paper contains: 6 Pages (including title page) INSTRUCTIONS: This paper contains 6 pages and 6 questions You are required to attempt ALL 6 questions Systems Programming Programming and Systems Time Allowed: 2:00 hours THIS IS A CLOSED BOOK EXAMINATION […]
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CITS2002 Systems Programming 1 next ¡ú CITS2002 CITS2002 schedule Allocating primary memory to processes The important task of allocating memory to processes, and efficiently ensuring that processes have their instructions and data in main memory when needed, is termed memory management. We’ll need to consider the role that memory plays from two (conflicting?) perspectives: the
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CITS2002 Systems Programming 1 next ¡ú CITS2002 CITS2002 schedule The fundamental activity of an operating system is the creation, management, and termination of processes. What is a process? Naively: a program under execution, the “animated” existence of a program, an identifiable entity executed on a processor by the operating system. More particularly, we consider how
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CITS2002 Systems Programming 1 next ¡ú CITS2002 CITS2002 schedule The Principle of Referential Locality Numerous studies of the memory accesses of processes have observed that memory references cluster in certain parts of the program: over long periods, the centres of the clusters move, but over shorter periods, they are fairly static. For most types of
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CITS2002 Systems Programming 1 next ¡ú CITS2002 CITS2002 schedule Users and their Operating System representation Traditionally, an operating system positions itself directly between running processes and the hardware, and only permits information about the hardware, and software’s queries and requests to pass through the kernel. System calls are (supposed to be) the only mechanism by
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CITS2002 Systems Programming 1 next ¡ú CITS2002 CITS2002 schedule Raw input and output We’ve recently seen how C11 employs arrays of characters to represent strings, treating the NULL-byte with special significance. At the lowest level, an operating system will only communicate using bytes, not with higher- level integers or floating-point values. C11 employs arrays of
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FAMILY NAME: GIVEN NAMES: SIGNATURE: STUDENT NUMBER: SEMESTER 2, 2020 EXAMINATIONS Physics, Mathematics & Computing Department of Computer Science and Software Engineering This paper contains: 6 Pages (including title page) INSTRUCTIONS: CITS2002 Systems Programming Programming and Systems Time Allowed: 2:00 hours This Paper Contains 6 Pages and 4 Questions. You are required to attempt ALL
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2021/8/30 CITS2002 Systems Programming, Lecture 9, CITS2002 Systems Programming CITS2002 CITS2002 schedule Creating a new process using fork() fork() is very unusual because it returns different values in the (existing) parent process, and the (new) child process: the value returned by fork() in the parent process will be the process-indentifier, of process-ID, of the child
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2021/8/30 CITS2002 Systems Programming, Lecture 10, CITS2002 Systems Programming CITS2002 CITS2002 schedule Operating System Services All operating systems provide service points through which a general application program may request services of the operating system kernel. These points are variously termed system calls, system traps, or syscalls. It is considered desirable to minimise the number of
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CITS2002 Systems Programming 1 next ¡ú CITS2002 CITS2002 schedule Welcome to CITS2002 Systems Programming The unit explores the role of contemporary operating systems and their support for high-level programming languages, how they manage efficient access to computer hardware, and how a computer’s resources may be accessed and controlled by the C programming language. The unit
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