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How optimization is achieved in DNS?
Two primary optimizations used in DNS and they are: replication and caching. All root servers is replicated; various copies of the server exist around the world. While a new site joins the internet, the site configures its local DNS server along with a list of root server. The site server uses any root server is most responsive at a provided point of time. Into DNS caching each server maintains a cache of names. When this looks up a new name, the server puts a copy of the binding in its cache. Before contacting other server to request a binding, the server checks its cache; when the cache have the answer the server uses the cached answer to produce a reply.
Write down different system calls for performing different kinds of tasks. The major types of system calls are given as: Process Control: These kinds of system calls are
Interrupts are signals which cause the CPU to suspend the currently executing program and transfer to a special program known as an interrupt handler. Interrupt handler determines
In a particular exchange during busy hour 1200 calls were offered to a group of trunks, during this time 6 calls were lost. The average call duration being 3 minutes Calculate
Explain Garbage collection In this method two passes are made over the memory to identify new areas. In the first pass it traverses all pointers pointing to allocated areas an
Q. Explain Fixed Point Representation? The fixed-point numbers in binary has a sign bit. A positive number has a sign bit 0 whereas negative number has a sign bit 1. In fixed-p
Explain Simplifying the SOP f the Boolean expression using the K-Map? To simplify the SOP of the Boolean expression using the K map, first identify all the input combinations tha
LCDs are the screens of choice for lightweight screens andportable computers. They consume very little electricity and have advanced technically to quite good resolutions and colou
In LDB what determines hierarchy of the tables? Structure
Define about classes of object oriented modelling A class is a collection of things, or concepts that have the same properties. Each of these concepts or things is known an obj
Q. Show Synchronous mode for point-to-point message passing? Synchronous mode: Transmitting can be started whether or not matching receive has been started, but transmitting w
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