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Specification link
Operating system (OS)
- describe why a computer system requires an operating system
- explain the key management tasks carried out by the operating system
Utility programs
- show an understanding of the need for typical utility software used by a PC computer system:
- disk formatter
- virus checker
- defragmenter software
- disk contents analysis/disk repair software
- file compression
- backup software
Library programs
- show an understanding that software under development is often constructed using existing code from program libraries
- describe the benefits to the developer of software constructed using library files, including Dynamic Link Library (DLL) files
- draw on experience of the writing of programs which include library routines
Language translators
- show an understanding of the need for:
- assembler software for the translation of an assembly language program
- a compiler for the translation of a high-level language program
- an interpreter for execution of a high-level language program
- explain the benefits and drawbacks of using either a compiler or interpreter
- show awareness that high-level language programs may be partially compiled and partially interpreted, such as Java
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