A system call is an interrupt to the operating system to perform some activity. On receiving a system call CPU su…
Process in Operating System A process is program under execution. It includes the code, data, stack and processor …
Client server system A client server system is a computing system that is composed of two logical parts, a server whi…
Message Transfer Agent Meaning The actual mail transfer is done through message transfer agent . To send mail, a syst…
Recursion and Iteration Difference Both iteration and recursion are based on a control statement. Iteration uses…
A function prototype is a function declaration that specifies the data types of its arguments in the parameter list.…
Structured programming is a technique for organising and coding computer programs in which a hierarchy of modules is…
A sequential logic is a circuit whose output depends on current input and previous values stored in the flip flops i…
Secondary memory is mass storage devices used to store data permanently. Example: Hard Disk
In DOS F9 key is used to visit history from where they can be taken and executed, when F9 is pressed system will ask c…
Global variables are those variables which are visible to all functions. Any function can read/modify them. Global var…
This command is used to quit a program. When exit command is executed, the current program is terminated.
Hard disk consists of a number of platters which are circular discs on which data are recorded. Data is recorded in ci…
CPU executes instructions as follows instructions are in primary memory various steps are: 1. Place the address of i…
Secondary storage is used to store data/ programs permanently. Data is not lost when power goes off. They are also …
Primary memory is the memory from where CPU fetches instructions and executes them. It often refers to the semiconduct…
C : Make C drive as the current drive. DIR : Directory list of all files and directories under current directory is d…
Usually programs are stored in a disk. To compile a program, in standard integrated development environments we need to…
Office Automation system is an information system that supports the wide range of business office activities that provi…
An algorithm is a detailed sequence of simple steps that are needed to solve a problem. A flow chart is a graphical…
File system is a method of storing and organising computer files and their data. It organises the files into a databa…
The six major steps involved in setting up a database for an enterprise: 1. Requirement Analysis 2. Conceptual data…
Data independence is the capacity to change the schema at one level of database system without having to change the sc…
1). The Database Management System allows access to tables at a time. A file management system allows access to single …
A loader is a program that places programs into main memory for execution. The assembler or compiler outputs the machi…
Interrupt is an output to the CPU that causes CPU to suspend its normal sequence of execution and force the CPU to br…
Windows operating system provide following enhancements to the old MS DOS operating system: 1. GUI capability: Wind…
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