Elective: Power Management (Part -1)

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Elective: Power Management (Part -1)

Attend any 4 questions.  Each question carries 25 marks

(Each answer should be of minimum 2 pages / of 300 words)

Question.1.In computing Power management is known as PC power management and is built around a standard called ACPI. Explain.

Answer:Power Management is a feature of some electrical appliances, especially copiers, computers, GPUs and computer peripherals such as monitors and printers, that turns off the power or switches the system to a low-power state when inactive. In computing this is known as PC power management and is built around a standard called ACPI. This supersedes APM. All recent (consumer) computers have ACPI support.

Question 2.The ACPI specification defines four Global “Gx” states and six Sleep “Sx” states for an ACPI- compliant computer-system. Explain.

Answer:In computing, the Advanced Configuration and Power Interface (ACPI) specification provides an open standard that the operating systems can use for computer hardware discovery, configuration, power management, and monitoring. Internally, ACPI exports the available functionalities by providing certain instruction lists as part of the system firmware, which the operating system kernel interprets and executes to perform desired operations, using a form of embedded virtual machine.

Question 3.Discuss IEEE 1394 Interface.

Answer:IEEE 1394 is an interface standard for a serial bus for high-speed communications and isochronous real-time data transfer. It was developed in the late 1980s and early 1990s by Apple, who called it FireWire. The 1394 interface is comparable to USB though USB has more market share. Apple first included FireWire in some of its 1999 Macintosh models, and most Apple Macintosh computers manufactured in the years 2000 - 2011 included FireWire ports. However, in 2011 Apple began replacing FireWire with the Thunderbolt

Question 5.The terms speed and bandwidth are used interchangeably,“high-” is alternatively written as “hi-”.Explain.

Answer:

Question.6.Connectors cannot be plugged in upside down and it is clear from the physical act of making a connection, when the plug and receptacle are correctly mated. Why Explain.

Answer:

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