Explain the functions of an operating system.

Important functions of an operating System: 

1. Security – 
   The operating system uses password protection to protect user data and similar other techniques. it also prevents unauthorized access to programs and user data. 
    
2. Control over system performance – 
   Monitors overall system health to help improve performance. records the response time between service requests and system response to having a complete view of the system health. This can help improve performance by providing important information needed to troubleshoot problems. 
    
3. Job accounting – 
   Operating system Keeps track of time and resources used by various tasks and users, this information can be used to track resource usage for a particular user or group of users. 
    
4. Error detecting aids – 
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