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Questions by radha gogia

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2
Please explain how can source and destination IP address be invlincl in a TCP Segment when IP address are to be dealt at network layer . Why do we have a different checksum in TCP Segment when we already have a one in IP header .
asked Dec 3, 2018 in Computer Networks 56 views
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0 answers
3
I am getting 55-54 =1 as output but answer mentioned is 10 .
asked Nov 26, 2018 in Programming 183 views
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0 answers
5
Answer given is Option A , but here we wil first sort the jobs in order of profit , for each value of deadline scan linearly in the array depending on the value of deadline , so it should take O(n^2) in worst case .
asked Nov 16, 2018 in Algorithms 93 views
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0 answers
6
I am just confused between option 1 and 4 , according to me they both are same since a relational Model doesn't support duplicate tuples , so in every case natural join and intersect will give same result of tuples , but in answer given it states that both operations are different ?
asked Nov 14, 2018 in Databases 116 views
0 votes
1 answer
7
I am getting the conclusion to be true by Proof by Contradiction , what's wrong in the approach ?
asked Nov 13, 2018 in Mathematical Logic 173 views
1 vote
1 answer
8
In X+y+z<=12 , X,y,z>=1 How to find total no of integral solutions ?If you are introducing any dummy variable for solving , please do explain the logic behind this .
asked Nov 11, 2018 in Combinatory 417 views
1 vote
1 answer
10
0 votes
1 answer
11
In the below table why can't we form minterms where the function takes value 0 , say for the first combination why can't we write a'b'c' as one of the minterms ? What's the issue in considering this minterm in the function ?
asked Oct 16, 2018 in Digital Logic 89 views
0 votes
1 answer
13
Why 3NF is inadequate in situations where the relation: 1) has multiple candidates key 2) has candidate key that are composite 3) has overlapped candidate keys . Example needed , I could justify a bit for point 3 where there may be partial FD's present in case we have candidate key that are composite , but I am not sure
asked Sep 25, 2018 in Databases 387 views
1 vote
0 answers
14
Please explain these points : No ICMP error message will be generated for a fragmented datagram that is not the first fragment . No ICMP error message will be generated for a datagram having a multicast address . No ICMP error message will be generated for a datagram having a special address such as 127.0.0.0
asked Sep 8, 2018 in Computer Networks 538 views
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0 answers
15
Here Domain and co-Domain is Integers. I am getting fog=gof , what's wrong in this approach ?
asked Sep 7, 2018 in Set Theory & Algebra 90 views
0 votes
1 answer
16
(p->q) ^ (r->s) ~q OR ~s Conclusion is ~p OR ~r How to see if the conclusion is valid or not ?
asked Sep 7, 2018 in Mathematical Logic 60 views
0 votes
2 answers
18
I am getting answer as 0.6 My approach if in the next two insertions we require atleast one collision , so if in 2 insertions , we have just one collision then it is 30/50*20/50 , if we have 2 collisions in the next 2 insertions , we get 30/50*30/50 , adding them gives 0.6 . What's wrong in this method ?
asked Aug 29, 2018 in DS 41 views
0 votes
1 answer
20
P->R Q->R How is the conclusion is (P^Q)->R ? I could only derive that both P and Q are true .
asked Aug 26, 2018 in Mathematical Logic 98 views
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