1.What is the role of the computer operating system? Identify several activities performed by this key...

1.What is the role of the computer operating system? Identify several activities performed by this key piece of software.

2. What is an entity-relationship diagram, and what is its purpose?

3. What is Hadoop? What are its primary components, and what does each do?

Expert Solution

1. The computer operating system is a link between the hardware and software systems of a computer. It becomes an interface for the programs that request I/O and hardware. It plays a vital role in managing the resources of computer hardware like data storage, processors and memory and providing services for application software. It hides the complexities of hardware from end user. "Interupts" are generated by input/output controllers which are handled by operating system. It helps in sharing the different I/O between various programs that are using the CPU. In simple words, right from booting, loading and execution to memory management, data security, disc and process management and device and printing controlling it performs all actions that is required to make the software and hardware function on a computer.

( As the questions are not inter-related and three seperate questions, I am required to answer only one. Please send other questions seperately one by one. Thanks)

keosha answered 1 year ago

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