Part 1 Many phone companies are replacing the wire in their phone s.pdf

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Part 1: Many phone companies are replacing the wire in their phone systems with fiber optic cable. Name at least two advantages they expect to gain from doing so. In one paragraph each, describe why fiber optic cable gives each advantage. Part 2: Explain the difference between an amplifier and a repeater for transmitting data over distances. In your answer, tell why repeaters are preferred for digital data. Part 3: Explain why a hardware timer that can generate interrupts is necessary to support concurrent processing. Part 4: Explain why a graphical or window-based operating system interface is more readily amenable to running multiple tasks than is a command line interface. Part 5: What is the spectrum of a signal? What is the relationship between the spectrum of a signal and the bandwidth of a channel? (Use the textbook; you\'ll likely get a wrong answer from a web search!) Part 6: Name and briefly describe the three characteristics of a sine wave signal that can be modulated to allow the signal to carry information. Part 7: Explain how frequency division multiplexing can be used to carry two or more independent information streams on one communication medium. Part 8: A modern CPU has a bit that can place the CPU in the system state or the application state. Briefly describe the difference between \"system state\" and \"application state.\" Part 9: What does it mean to \"mount\" or \"unmount\" a storage device? Explain why unmounting a device is necessary in the Windows operating system. Part 10: Explain what it means to bootstrap a computer. In your answer, describe the steps executed by the hardware and software in bootstrapping a computer that is initially turned off. Solution Part 1: Due to much lower attenuation and interference, provides long distance, Fiber optic signals are stronger.These are much thinner and lighter than metal wires.Data can be transmitted digitally.It has less susceptible to interference. Part 2: An amplifier can not discriminate between the intended signal and noise,it amplifies equally everything fed into it.A repeater does not amplify the signal.It regenerates the signal.When it receives a weakened or corrupted signal,it creates a copy,bit for bit at the original strength. A repeater is a regenerator. Using the large number of amplifiers over a long, lossy link inevitablyincreases the noise and decreases the signal to noise levels.A repeater is usually a receiver followed by a regenerating logic and transmitter.In this case regeneration receives the digital signals and retimes it to remove jitter and then retransmits it with minimal baseband noise. Part 4: Graphical User Interface uses graphics along with a keyboard and mouse,to provide an easy to use interface to a program.It provides windows,pulldown menus,buttons,scrollbars,iconic images,wizards and other icons and the mouse to enable the users to interact with the operating system. users easy to control,manipulate and toggle through multiple programs and fo.

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decreases the signal to noise levels.A repeater is usually a receiver followed by a regenerating
logic and transmitter.In this case regeneration receives the digital signals and retimes it to
remove jitter and then retransmits it with minimal baseband noise.
Part 4:
Graphical User Interface uses graphics along with a keyboard and mouse,to provide an easy to
use interface to a program.It provides windows,pulldown menus,buttons,scrollbars,iconic
images,wizards and other icons and the mouse to enable the users to interact with the operating
system. users easy to control,manipulate and toggle through multiple programs and folders at
same time. Using Command Line Interface, it do not offer the same ease and ability to view
multiple things at once on one screen.
part 9:
The mount command mounts a storage device or file system, making it accssible and attaching it
to an existing directory structure.The unmount command unmounts a mounted file
system,incoming the file system,informing the system to complete any pending read or write
operations and safely detaching it.
Part 10:
Bootstraping is the process of loading the basic software into the memory of a computer after
power on or general reset. generally the operating system which will then take care of loading
other software as needed. In computers pressing a bootstrap button caused a hardwired program
to read a bootstrap program from an input unit.

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please answer these questions number by number Solution 1) An Operating System (OS) is an interface between a computer user and computer hardware. An operating system is a software which performs all the basic tasks like file management, memory management, process management, handling input and output, and controlling peripheral devices such as disk drives and printers. An interface is a shared boundary across which two separate components of a computer system exchange information. The exchange can be between software, computer hardware, peripheral devices, humans and combinations of these. Some computer hardware devices such as a touchscreen can both send and receive data through the interface, while others such as a mouse or microphone may only provide an interface to send data to a given system. Based on the user interface, there are two types of operating systems. 2) An Operating System provides services to both the users and to the programs. It provides programs an environment to execute. It provides users the services to execute the programs in a convenient manner. Following are a few common services provided by an operating system Program execution I/O operations File System manipulation Communication Error Detection Resource Allocation Protection 3)An abstraction layer or abstraction level is a way of hiding the implementation details of a particular set of functionality, allowing the separation of concerns to facilitate interoperability and platform independence. Software models that use layers of abstractioninclude the OSI 7- layer model for computer network protocols, the OpenGL graphics drawing library, and the byte stream input/output (I/O) model originated from Unix and adopted by MS-DOS, Linux, and most other modern operating systems. 4) communication services is important to the long-term success of any business. In the early stages of the relationship, effective communication ensures your product or service meets the customer\'s immediate needs. As time goes on, regular communication with your customer base allows you to adapt and grow so you can continue to meet its requirements 5) The Differences between Proprietary and Open Source Software Open Software Proprietary Software (Linux Ubuntu, OpenOffice.org Write, (Windows Vista, Microsoft Word 2007, GIMP) Adobe Photoshop CS3)S Purchased with its source s Purchased without its source code codeS User can get open software s User must pay to get the for free of charge proprietary softwaren Users can modify the w Users cannot modify the software software w User must have a license fromn Users can install software vendor before install into freely into any computer computerc No one is responsible to the s Full support from vendor if software anything happened to the software 6) Read-write memory (RWM) is computer memory that can be read from and written to. This type of memory can be contrasted with read-only memory, which cannot be modified after it is written. Both of these cont.

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It\'s all worked out, but I\'m still very confused by the steps they took to get each part. Like why multiply everything by (x^2 + 9) and then in the next step, how did they end up with those answers? I\'m just very confused. Solution they just multiplide (x^2 + 9) for simpification LIKE EXAMPLE eq 2+3=5 if we multify both sides with 2 (2+3)2=5*2 10=10 equality not changed ,,,like we use this in mathematics after solving eq they got X parameters and they cheked in original eq.

Its all worked out, but Im still very confused by the steps .pdf

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Is the world overpopulated? What are the arguments for the notion that the world is overpopulated? What are some alternative approaches to this topic? Solution The human popualtion has been growing ever since the evolution of mankind. Overpopulation is a condition when the population exceeds the carrying capacity of the environment. There is continuous increase in the birth rate and a significant decrease in the mortality rate. This results in increase in population at an alarming rate. The population of the world is predicted to keep on rising 2050. The sources and resources are being exhausted. This would lead to environment\'s inability to support life, reduced quality of life..

Is the world overpopulated What are the arguments for the notion th.pdf

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In the ellipse shown below, each point marked with a dot is called a(.pdf

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Identify the following: Level of caudal end of subarachnoid space Epidural, subarachnoid spaces Level of caudal end of spinal cord Solution Answer:- Level of caudal end of Subarachnoid space is lower border S-2 Vertebra. Epidural- Basically epidural space is define as the outermost part of the spinal canal.it is also called as the epidural cavity. this space lying outside th edura meter. Dura meter enclsoed by the subarachnoid space. it contains a lumphatics spinal nerve roots and network of internal vertebral venous plexuses.level is L1 & L2. Level of caudal end of spinal cord. - The Spinal cord can be defined as the long , thin tubular bundles of nervous tissue and it supports cells and it run in vertebral column. the caudal end of spianl cord is generaly cone shaped it is also called as the conus medullaris. and its ends at S2 level..

Identify the following Level of caudal end of subarachnoid space E.pdf

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