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COMPUTER ORGANIZATION & ARCHITECTUREExplain virtual memory. Explain the role of logical as well as physical address.20147mOperating SystemWhat does a virtual machine do? (i) Manages only hardware devices (ii) Replaces the operating system (iii) Acts as a real machine but is implemented in software (iv) Removes the need for file systems20242mCOMPUTER ORGANIZATION & ARCHITECTUREExplain the concept of virtual memory with the help of a diagram. Explain how virtual address is mapped to actual physical address.201714mOperating SystemWhat is the motive of using a Virtual Machine for an operating system? (i) Increase CPU throughput (ii) Run multiple operating systems on the same hardware (iii) Create databases (iv) Allow multiple threads to execute concurrently within a process20252m