Chapter 1
... • Portable means that a program may be written on one type of computer and then run on a wide variety of computers, with little or no modification. • Java byte code runs on the JVM and not on any particular CPU; therefore, compiled Java programs are highly portable. • JVMs exist on many platforms: • ...
... • Portable means that a program may be written on one type of computer and then run on a wide variety of computers, with little or no modification. • Java byte code runs on the JVM and not on any particular CPU; therefore, compiled Java programs are highly portable. • JVMs exist on many platforms: • ...
Computer Science - Rainhill High School
... Understand that there are two ways to manage files and folders Be able to move, copy, rename and delete files and folders at a command prompt Be able to identify advantages and disadvantages of both graphical and command line methods for managing files and folders Understand the link between the GUI ...
... Understand that there are two ways to manage files and folders Be able to move, copy, rename and delete files and folders at a command prompt Be able to identify advantages and disadvantages of both graphical and command line methods for managing files and folders Understand the link between the GUI ...
CC4201519521
... shared files for inter-process communication. But android operating system also provides new mechanism for IPC such as Binder, Services, Intents and ContentProviders. All these mechanism allows developers to verify the identity of application and also used to set the security policies [13]. ...
... shared files for inter-process communication. But android operating system also provides new mechanism for IPC such as Binder, Services, Intents and ContentProviders. All these mechanism allows developers to verify the identity of application and also used to set the security policies [13]. ...
COMP 110 Spring 2009 28
... Why is Java interpreted? The short answer is portability Can run the same byte code on any machine! • No need to recompile for Windows or Mac OS X ...
... Why is Java interpreted? The short answer is portability Can run the same byte code on any machine! • No need to recompile for Windows or Mac OS X ...
CS3204 Operating Systems - Spring 2001 Instructor: Dr. Craig A
... As stated in the syllabus, you must use Linux and gcc/g++ to implement this project. Your program must compile and run properly in the lab on RedHat 6.2. All data structures used in your program must be student implemented. Using the standard template library (STL) or other third party libraries for ...
... As stated in the syllabus, you must use Linux and gcc/g++ to implement this project. Your program must compile and run properly in the lab on RedHat 6.2. All data structures used in your program must be student implemented. Using the standard template library (STL) or other third party libraries for ...
Operating Systems Should Provide Transactions
... to database-managed secondary storage. programmability problems. The example in Figure 1 ilUnfortunately, the POSIX system call API has lagged lustrates a time-of-check-to-time-of-use (TOCTTOU) race behind in providing support for consistent updates to OS- condition, a major and persistent security ...
... to database-managed secondary storage. programmability problems. The example in Figure 1 ilUnfortunately, the POSIX system call API has lagged lustrates a time-of-check-to-time-of-use (TOCTTOU) race behind in providing support for consistent updates to OS- condition, a major and persistent security ...
scons
... • Both LIBS and LIBPATH can either be a Python list, or a single filename or path string, like the other arguments previously discussed. ...
... • Both LIBS and LIBPATH can either be a Python list, or a single filename or path string, like the other arguments previously discussed. ...
UNIX Operating System
... A journaling file system keeps track of the changes that will be made in a journal (usually a circular log in a dedicated area of the file system) before committing them to the main file system. In the event of a system crash or power failure, such file systems are quicker to bring back online and l ...
... A journaling file system keeps track of the changes that will be made in a journal (usually a circular log in a dedicated area of the file system) before committing them to the main file system. In the event of a system crash or power failure, such file systems are quicker to bring back online and l ...
2.01
... Programming interface to the services provided by the OS Typically written in a high-level language (C or C++) Mostly accessed by programs via a high-level Application ...
... Programming interface to the services provided by the OS Typically written in a high-level language (C or C++) Mostly accessed by programs via a high-level Application ...
Slides
... Typically written in a high-level language (C or C++) Mostly accessed by programs via a high-level Application Program Interface (API) rather than direct system call use Three most common APIs are Win32 API for Windows, POSIX API for POSIX-based systems (including virtually all versions of UNIX, Lin ...
... Typically written in a high-level language (C or C++) Mostly accessed by programs via a high-level Application Program Interface (API) rather than direct system call use Three most common APIs are Win32 API for Windows, POSIX API for POSIX-based systems (including virtually all versions of UNIX, Lin ...
Chapter 1
... • One of the newest programming languages • Conforms closely to C and C++ • Has the rapid graphical user interface (GUI) features of previous versions of Visual Basic • Has the added power of C++ • Has the object-oriented class libraries similar to Java ...
... • One of the newest programming languages • Conforms closely to C and C++ • Has the rapid graphical user interface (GUI) features of previous versions of Visual Basic • Has the added power of C++ • Has the object-oriented class libraries similar to Java ...
ch02-OS-Structures
... Program execution - The system must be able to load a program into memory and to run that program, end execution, either normally or abnormally (indicating error) ...
... Program execution - The system must be able to load a program into memory and to run that program, end execution, either normally or abnormally (indicating error) ...
OPERATINGSYSTEMS 2015
... policies–first fit, best fit and worst fit. Mention a disadvantage of best fit. 89. Explain the different disk space allocation methods and compare them. 90. Name the different file allocation methods. Explain the linked allocation method giving merits and demerits. ...
... policies–first fit, best fit and worst fit. Mention a disadvantage of best fit. 89. Explain the different disk space allocation methods and compare them. 90. Name the different file allocation methods. Explain the linked allocation method giving merits and demerits. ...
Syllabus Management System
... Faculty – Can edit syllabi to which he/she is assigned, view and search Student and Public – Can view and search for syllabi, see limited syllabi data. Students may or may not have addition access to syllabi information ...
... Faculty – Can edit syllabi to which he/she is assigned, view and search Student and Public – Can view and search for syllabi, see limited syllabi data. Students may or may not have addition access to syllabi information ...
Syllabus Management System
... Faculty – Can edit syllabi to which he/she is assigned, view and search Student and Public – Can view and search for syllabi, see limited syllabi data. Students may or may not have addition access to syllabi information ...
... Faculty – Can edit syllabi to which he/she is assigned, view and search Student and Public – Can view and search for syllabi, see limited syllabi data. Students may or may not have addition access to syllabi information ...
Operating system flexibility - La page d`accueil du P:L:O:U:G
... system and the new OS to be installed are on hand and complete. This includes updates, patches, utilities, and service releases. They should all be on hand on easily accessible media. Easily accessible means in a format that can be loaded without complicated driver setups. A floppy diskette is best. ...
... system and the new OS to be installed are on hand and complete. This includes updates, patches, utilities, and service releases. They should all be on hand on easily accessible media. Easily accessible means in a format that can be loaded without complicated driver setups. A floppy diskette is best. ...
Operating Systems and File Management
... Boot and Recovery Disks • You can create a custom recovery CD that contains your computer’s current settings and device drivers • Norton Ghost is a product of Symantec, which also provides a more specialized recovery disk called the Symantec Recovery Disk • Certain PC manufacturers have pre-install ...
... Boot and Recovery Disks • You can create a custom recovery CD that contains your computer’s current settings and device drivers • Norton Ghost is a product of Symantec, which also provides a more specialized recovery disk called the Symantec Recovery Disk • Certain PC manufacturers have pre-install ...
Processes and threads
... On a multiprocessor (including multi-core) different threads can be scheduled on different processors. This can only be done if the OS knows about the threads. Even then it sometimes doesn’t work - standard Python has system level threads but the Global Interpreter Lock (GIL) means that only one run ...
... On a multiprocessor (including multi-core) different threads can be scheduled on different processors. This can only be done if the OS knows about the threads. Even then it sometimes doesn’t work - standard Python has system level threads but the Global Interpreter Lock (GIL) means that only one run ...
slides
... secondary storage to back up main memory. • Most modern computer systems use disks as the principal on-line storage medium, for both programs and data. • The operating system is responsible for the following activities in connection with disk management: – Free space management, – Storage allocation ...
... secondary storage to back up main memory. • Most modern computer systems use disks as the principal on-line storage medium, for both programs and data. • The operating system is responsible for the following activities in connection with disk management: – Free space management, – Storage allocation ...
CIS162AB
... data and check the results. If it was incorrect, we would change the program, run it again, and reenter the data. Depending on the application, it may be more efficient to capture the raw data the first time it is entered and store in a file. A program or many different programs can then read ...
... data and check the results. If it was incorrect, we would change the program, run it again, and reenter the data. Depending on the application, it may be more efficient to capture the raw data the first time it is entered and store in a file. A program or many different programs can then read ...
Chapter 1
... • Portable means that a program may be written on one type of computer and then run on a wide variety of computers, with little or no modification. • Java byte code runs on the JVM and not on any particular CPU; therefore, compiled Java programs are highly portable. • JVMs exist on many platforms: • ...
... • Portable means that a program may be written on one type of computer and then run on a wide variety of computers, with little or no modification. • Java byte code runs on the JVM and not on any particular CPU; therefore, compiled Java programs are highly portable. • JVMs exist on many platforms: • ...
Library (computing)
In computer science, a library is a collection of non-volatile resources used by computer programs, often to develop software. These may include configuration data, documentation, help data, message templates, pre-written code and subroutines, classes, values or type specifications. In IBM's OS/360 and its successors they are referred to as partitioned data sets.In computer science, a library is a collection of implementations of behavior, written in terms of a language, that has a well-defined interface by which the behavior is invoked. This means that as long as a higher level program uses a library to make system calls, it does not need to be re-written to implement those system calls over and over again. In addition, the behavior is provided for reuse by multiple independent programs. A program invokes the library-provided behavior via a mechanism of the language. For example, in a simple imperative language such as C, the behavior in a library is invoked by using C's normal function-call. What distinguishes the call as being to a library, versus being to another function in the same program, is the way that the code is organized in the system. Library code is organized in such a way that it can be used by multiple programs that have no connection to each other, while code that is part of a program is organized to only be used within that one program. This distinction can gain a hierarchical notion when a program grows large, such as a multi-million-line program. In that case, there may be internal libraries that are reused by independent sub-portions of the large program. The distinguishing feature is that a library is organized for the purposes of being reused by independent programs or sub-programs, and the user only needs to know the interface, and not the internal details of the library.The value of a library is the reuse of the behavior. When a program invokes a library, it gains the behavior implemented inside that library without having to implement that behavior itself. Libraries encourage the sharing of code in a modular fashion, and ease the distribution of the code. The behavior implemented by a library can be connected to the invoking program at different program lifecycle phases. If the code of the library is accessed during the build of the invoking program, then the library is called a static library. An alternative is to build the executable of the invoking program and distribute that, independently from the library implementation. The library behavior is connected after the executable has been invoked to be executed, either as part of the process of starting the execution, or in the middle of execution. In this case the library is called a dynamic library. A dynamic library can be loaded and linked as part of preparing a program for execution, by the linker. Alternatively, in the middle of execution, an application may explicitly request that a module be loaded.Most compiled languages have a standard library although programmers can also create their own custom libraries. Most modern software systems provide libraries that implement the majority of system services. Such libraries have commoditized the services which a modern application requires. As such, most code used by modern applications is provided in these system libraries.