State the term multi programming
State the term multi programming.
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Multi programming:It is the technique of running various programs at a time by using timesharing.It permits a computer to do various things at same instant. It creates logical parallelism.The notion of multiprogramming is that the operating system keeps various jobs in memory concurrently. The operating system chooses a job from the job pool and begins executing a job, when such job requires waiting for any I/O operations the CPU is switched to other job. Therefore the main idea is that the central processing unit is never idle.
Arithmetic expression: It is an expression comprising numerical values of integer or floating point kinds. For example, operators like +, -, *, / and % get arithmetic expressions as their operands and generate arithmetic values as their outcomes.
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Hardware: It is the physical devices of a computer system, like its micro-chips, keyboard, disk drives, printer, sound card, and so forth. It is termed `hardware' in contrary to programs, which are termed `software'.
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