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Questions by annie1234

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combinatrics
A box contains five set of balls while there are three balls in each set. Each set of ballshas one colour which is different from every other set. What is the least number of ... of the same colour has beenremoved?(a) 6 (b) 7(c) 9 (d) 11
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regular expression
Write the regular expression of string not ending with 001
349
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Tcp
Does TCP follow circuit switching ??
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csma/cd
In csma/cd no of retransmissions r less than csma/ca. But my ques is in csma/cd why the data will be retransmited ? Bcz after acquiring the channel only the data packet is sent?explain pls?
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Subnetting
What is the problem with discontinous mask?
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PING Command
When echo request is sent ,then internally "ARP request"is generated for "getting destination MAC " , but what is the need of destination MAC ,if the IP assigned ... that can be sent without knowing MAC also ...??? Please clear this doubt
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Grammer
I read somewhere that " If any grammer follows prefix property than it will be LL(k) , otherwise it will be LR(k)".Now my ques is ... although ... it can have Left recursion ... so is above statement correct (that generalised statement)?
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IP Addressing
Why mac address alone can't be used in transmitting the data . ?why will be the prob.? Explain please ?
547
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Graph traversal
Why DFS is more efficient than BFS in determining the presence of a cycle in graph ?Explain please .
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Graph traversal
What is back edge,forward edge,and cross edge in DFS? Explain please with examlpes .
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pls suggest me some books of engg. mathematics for conceptual study .