Questions by Gate Fever

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1

made easy cbt2
consider the following relational schema R(A,B,C,D,E,F,G) AB->C,BC->A,AC->B,B->D,D->E how many minimum relations required to decompose R into BCNF which satisfy lossless and FDP decomposition? initially i got 4 relation as R1(A,B,C) R2(D,E) R3(B,D) R4(A,B,F,G) but in R1 and R2 there is no common attribute, hence it will not be lossless??am i correct

asked in Databases Jan 28, 2019

336 views

1 vote

1 answer

2

made easy mock 2
consider the language L= {$x^{l}y^{m}z^{n}$|(l+m+n) is divisible by 5} which of the following is correct? L is recursive CSL CFL regular

asked in Theory of Computation Jan 21, 2019

322 views

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3

made easy mock 2
consider a disk having 10 platters with 2 recording surfaces each surface contains 80 tracks and each track contains 400 sectors with 1 sector capacity of 4KB.The capacity of 1 cylinder is ____? i was getting 400*4 KB = 1600 KB am i wrong ?

asked in Operating System Jan 21, 2019

338 views

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4

general aptitude
statements:- some authors are teachers No teacher is a lady. conclusion:- I.some teachers are not ladies II.some ladies are teachers according to me neither conclusion I follows nor II am i correct??

asked in Verbal Aptitude Jan 21, 2019

897 views

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1 answer

5

MADE ESY MOCK 1
consider R(A,B,C,D,E) with FDs AB->C,C->D,D->B,D->E if number of keys in relation R is ‘a’ and the number of relation in 3NF decomposition is ‘b’ what is the value of a-b? i am getting a=3,b=4 a-b=-1 am i correct?

asked in Databases Jan 20, 2019

165 views

1 vote

0 answers

6

made easy adv mock
the number of ways in which we can place 3 white pawns and 3 black pawns on a 3*3 chessboard my answer was 12. approach :- we cant have any 2 black pawns or 2 white pawns in the same row or column {3*2*1} * {2*1 * 1} am i correct??

asked in Combinatory Jan 18, 2019

434 views

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1 answer

7

self doubt
if the flip flops are going in these states that is starts from 0 to 5 then 4 and then again 5 .Then what is the mod of the circuit??

asked in Digital Logic Jan 18, 2019

236 views

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0 answers

8

made easy adv mock
A graph G is self complementary iff G is isomorphoc to its complement.Let X be a self complementary graph.Which of the following is a viable possibility with regards to connectivity of X and X' ,where X' denotes the complement of X? a)both X and X' are ... X' is disconnected c)X' is connected and X' is disconnected d)both X and X' are connected ans is (d) pls explain

asked in Graph Theory Jan 18, 2019

133 views

1 vote

2 answers

9

made easy mock
minimum number of nodes (both leaf and non leaf) of B+ tree index required for storing 5500 keys and order of B+ tree is 8 _________ (order is maximum pointers a node can have) am getting 4681

asked in Databases Jan 17, 2019

1.9k views

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10

made easy mock 2019
(i)A computer can have multiple MAC addresses (ii)A computer can have multiple IP addresses at different instances of time true/ false?? acc to me (i) false (ii)true

asked in Computer Networks Jan 14, 2019

641 views

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0 answers

11

made easy cbt1
consider the following languages M and N M={W$W^{R}$W$W^{R}$ | W$\epsilon$(0,1)*} N={W1$W1^{R}$W2$W2^{R}$ | W1,W2$\epsilon$(0,1)* which of the following languages are CFL?

asked in Theory of Computation Jan 13, 2019

470 views

0 votes

1 answer

12

made easy cbt1
consider the raletion schema:- R(A,B,C) with functional dependency {A->B} which of the following query returns “0” if no records of R violates A->B functional dependency[assume no NULL’s] for this question I directly marked (d) option as they have used count(*) and count func gives 1 even for null. am i wrong??

asked in Databases Jan 13, 2019

219 views

0 votes

1 answer

13

made easy cbt1
FIFO replacement policy ignores locality of reference. true/false

asked in Operating System Jan 13, 2019

742 views

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0 answers

14

made easy cn 2018
consider the following statement:- data link layer define the boundaries of frame because framing is always of fixed size true or false?? acc. to me , its true

asked in Computer Networks Jan 12, 2019

569 views

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0 answers

15

made easy full
which of the following is not an operator grammar?(where S,A,B are non terminals and a,b are terminals) i)S->AaB A->a/$\epsilon$ ii)S->Aa iii)S->AB A->aA/a iv)S->Ba B->b/Ba acc to me (i),(iii),(iv) should be the answer

asked in Compiler Design Jan 12, 2019

465 views

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0 answers

16

made easy 2019 full test 2
consider a system with 48 bit virtual address and page size is 16KB.Operating system uses multilevel paging.page table entry size is 4B.What is the number of entries in the last level page table such that last level page table will fit into exactly one page. I am getting 4096.

asked in Operating System Jan 12, 2019

542 views

0 votes

0 answers

17

made easy
let an be the recurrenence relation which satisfies $a_{n}=4(a_{n-1}-a_{n-2})$ with $a_{1}$=2 and $a_{2}=8$. let X corresponds to the value of $a_{17}$.then values of $log_{2}(\left | x \right |)$ will be _____? am getting 18.

asked in Combinatory Jan 11, 2019

194 views

0 votes

0 answers

18

made easy
An operating system operates a policy in which resources are numbered uniquely and processes are allowed to request for resources only in increasing resource number, can starvation occur?? according to me ,NO

asked in Operating System Jan 10, 2019

97 views

1 vote

1 answer

19

made easy
consider the speed of propagation of a signal along a cable is 2*10^8m/s and metwork has 10Mbps CSMA/CD network interconnecting 10 computers shown in below image.each computer is connected to the hub with a cable of different length .Computer H1 is ... 2.5 microseconds.what is the shortest packet length Lmin of this network in order to ensure that the CSMA/CD functions properly?

asked in Computer Networks Jan 10, 2019

940 views

0 votes

0 answers

20

made easy full test
what is the minimum level of Btree index for storing 7500 keys and order of Btree is 6(order is maximum child pointer a node can have)________ my approach = $\left \lceil log_{5}7500 \right \rceil$ = 6

asked in Databases Jan 9, 2019

311 views

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title	title:apple
content	content:apple
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views	views:100
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