CAT 2

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  1. 4. Is the first portion of the operating system to load into a protected area in the memory so as not to be overwritten. It is responsible for key functions of the Operating system such as process management, memory management, file management, interrupt handling and disk drive management to mention a few
  2. 5. shell is a command line interface that enables the user to interact with the computer
  3. 6. systems are the oldest and most common architecture where operating systems run as a single program in kernel mode. The OS resides on kernel for anyone to execute. The functionality of the Operating Systems is invoked with simple function calls (system calls) within the kernel as a single large program.
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  1. 1. All information stored in a computer must be in a file. There exists a number of file types such as; data files, program files, directory files, text files etc. Each file type stores a different type of information for example text files stores textual data while program files stores programs. thus, a file is simply a collection of data or information that has a name/identity usually called filename.
  2. 2. Machines VM is a software program that enables a host machine to support different operating systems just like a separate computer. It is created within another computing environment (host).
  3. 3. calls are used for hardware services, to create or execute a process and for communicating with kernel services. It is a technique used by programs to interact with the Operating system. Ideally, a computer program makes a system call whenever it makes a request to the kernel.