What is Software: Glance
- Software is a set of programs that ensures the efficient working of a computer.
- System software is used to control the hardware as well as the software components of a computer.
- The operating system manages various resources of a computer. Storing an executable process using reasonable space in the main memory efficiently is referred to as the process management of the operating system.
- In a multiprogramming system, separate areas of the main memory are allocated for different processes which are readily available for their execution.
- Virtual memory is a system of effective storage of a large process in a comparatively smaller RAM area, In case, a hard disk does not have sufficient space for storing a file, it is split into a number of parts and each part is stored in a fragmented area of the hard disk.
- When a process seeks I/O data transfer, an interrupt signal is issued to the operating system. Further VO devices are activated for data transfer accordingly.
- A compiler is system software that converts a source code (program in a high-level language) into executable machine code (low-level language).
- During compilation, a source code needs to travel through six phases of the compiler.
- The syntax analysis and semantic analysis are the phases of the compiler which detect the syntactic and semantic errors in the program, respectively
- The interpretation phase converts the source code into an intermediate code which can be used for generating assembly code easily
- An assembler is used to convert a program coded in assembly-level language into machine code. The loader is the software that is responsible for loading a program from the hard disk to the main memory (RAM).
- The linker is the software that is used to link various library functions with the main program.
- An application developed by the user to carry out a specific task on a computer.
- The unity software are small program used for some predefined tasks like Backup Disk Clean, Disk Defragmenter, etc.
- Parallel computing (processing) is a multi-processing system that uses multiple CPU's at a time to process the user's instructions.
- MS Word, MS Excel, MS PowerPoint, MS Access software are some examples of application software. An application software is further categorized in two ways viz. generic and customized software Customised software is specially designed software specific to the requirement of an organization or a company.
- The deletion of data means the process of removing data from a computer system in such a way that it is no longer possible to recover it.
- When any data is simply deleted from any storage device, its address is marked as free. There are various tools available to recover the deleted data such as Recuva (Windows), DiskGenius (Windows), etc.
- We should not discard the old, broken, or malfunctioning storage devices without taking proper care of deleting data.
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