What is uniprogramming Uniprogramming means one program sits in main memory at a time. Uniprogramming was used in old computers and mobiles. When the computer starts then operating system and application programs are loaded into main memory. We only count user programs running in RAM. RAM is also called main memory. In old operating systems […]
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Definition of multiprogramming The process of sharing CPU time with multiple programs or jobs is called multiprogramming. Multiprogramming is based on content switching. In context switching, one job run until I/O interrupt occurs. When I/O interrupt occurs then CPU switch to another job. There may also occur other types of interrupts like event interrupt, memory
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What is batch processing In batch processing data is processed in parts. This type of processing is done at the end of the day, week, or month. Batch processing is used in many places like printing utility bills, processing credit cards, processing group of images in Photoshop. In batch processing, all data is stored in
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Today i will teach you how to find IP address, referrer, uri , operating system using php. We will use $_SERVER to get all this information. $_SERVER[‘HTTP_REFERER’] is used to get the url of the page that refered the user to the current location. $_SERVER[‘REMOTE_ADDR’] is used the get the client IP address $_SERVER[‘REQUEST_URI’] is
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