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Question:
(a) What are the main challenges for Mobile Computing?
(b) What is the ISM band and what is particular about this frequency band? Name two wireless technologies that make use of the ISM frequency band.
(c) Describe 5 effects that can disturb signal propagation.
(d) What is meant by digital modulation? Illustrate you answer with a diagram.
(e) How could you modify the basic phase shift keying modulation technique to improve efficiency?
Explain the concept of Reentrancy? It is a useful, memory-saving method for multiprogrammed timesharing systems. A Reentrant Procedure is one in which many users can share a si
When we download a movie from the Internet, we don't care about, say, packet sizes. However, even ifwe are not aware of howlow-level details of networks are implemented, our data i
What is a buddy system? We are dividing the memory as powers of two therefore the division will be 2, 4, 8, 16, 32, 64, 128, 256...i.e. in powers of 2 as well as we are selecti
BENEFITS OF THREADS OVER PROCESS If implemented correctly after those threads have some advantages of (multi) processes, they take: 1. Less time to create a new thread tha
Define spooling. A spool is a buffer that holds output for a device, like printer, that cannot accept interleaved data streams. When a request finishes printing, the spooling s
What is the use of FIFOs in client-server applications
What are the phases of background processing? Phases are:- Job Scheduling. Job Processing. Job Overview.
Processes and Programs Process is a dynamic entity which is a program in execution. A process is a sequence of information executions. Process exists in a limited span of t
What is the basic approach of page replacement? If no frame is free is available, find one that is not presently being used and free it. A frame can be freed by writing its con
Question 1 Describe about the shells of Linux operating system Question 2 Describe briefly about GNOME desktop Question 3 Write note on the following- Encryp
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