Recent activity by uzumzki / GATE Overflow for GATE CSE

2 answers

1

Consider this grammar: S → SS | a How many derivation trees are possible for a^4 ? (a) 3 (b) 4 (c) 5 (d) 6

Consider this grammar: S → SS | a How many derivation trees are possible for a^4 ? (a) 3 (b) 4 (c) 5 (d) 6 Is there any formulae to solve this kind of problem?

4.4k views

answered Aug 19, 2015

3 answers

2

if natural join is done then min and max no. of tuples if referential integrity is taken and not
R(ABC) S(BDE) F:A->B B ->C B->D D->E AND R HAS 100 TUPLES AND S HAS 200

R(ABC) S(BDE)F:A->B B ->C B->D D->EAND R HAS 100 TUPLES AND S HAS 200

2.0k views

commented Aug 18, 2015

2 answers

3

The following functional dependency hold for relations
The following functional dependency hold for relations R (A,B,C) and S(B,D,E):FD FOR BOTH THE TABLES B -> A, A -> C The relation R contains 200 tuples and the relation s contains 100 tuples. What is the maximum 4 number of tuples possible in natural join R|><|S?

The following functional dependency hold for relations R (A,B,C) and S(B,D,E):FD FOR BOTH THE TABLES B - A, A - C The relation R contains 200 tuples and the relation s c...

5.9k views

commented Aug 11, 2015

5 answers

4

Digital Logic
No of switching fn for f (A, B, C, D)=BD+B'D' How to approach this question ?

No of switching fn for f (A, B, C, D)=BD+B'D'How to approach this question ?

1.7k views

answer edited Aug 11, 2015

4 answers

5

UGC NET CSE | Junet 2015 | Part 3 | Question: 7
Let $E_1$ and $E_2$ be two entities in E-R diagram with simple single valued attributes. $R_1$ and $R_2$ are two relationships between $E_1$ and $E_2$ where $R_1$ is one-many and $R_2$ is many-many. $R_1$ and $R_2$ ... attribute of their own. How many minimum number of tables are required to represent this situation in the Relational Model? 4 3 2 1

Let $E_1$ and $E_2$ be two entities in E-R diagram with simple single valued attributes. $R_1$ and $R_2$ are two relationships between $E_1$ and $E_2$ where $R_1$ is one-...

10.4k views

commented Aug 11, 2015

4 answers

6

In stop and wait protocol , every 4th packet is lost.Find number of packets ?
In stop and wait protocol , every 4th packet is lost.If 8 packets are being sent, Find number of packets ? Answer given is : 10 Shouldn't Acknowledgements considered as well , in such case answer should be 18 , Right ?

In stop and wait protocol , every 4th packet is lost.If 8 packets are being sent, Find number of packets ?Answer given is : 10 Shouldn't Acknowledgements considered as we...

4.5k views

commented Aug 10, 2015

1 answer

7

Average memory acces time

403 views

answered Aug 9, 2015

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