Questions by Learner_jai

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21

test series
please guide,about the flow of code

asked in Operating System Dec 6, 2017

202 views

0 votes

1 answer

22

Random question
A DMA module is transferring character s to memory using cycle stealing, from a device transmitting at 9600 bits per second.The processor is fetching instructions at the rate of 3MIPS.By how much the processor be slowed down due to DMA activity

asked in CO and Architecture Nov 30, 2017

488 views

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0 answers

23

nptel
Consider a B-tree with the following specifications: Page size c = 2 kB; Size of key γ = 32 bytes; Size of pointer η = 8 bytes. What is the order m of the B+-tree? How many records can a tree of height 3 store? doubt: x->pointer to block 8*x +(8+32)*(x-1)<=2048 x<=43.5 but given solution is 2*1024>=32*m+8(m+1)+8*m=42.2=42 please guide where i am wrong

asked in Databases Nov 23, 2017

558 views

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0 answers

24

self doubt dbms
Deletion in B+ tree, unable to get the underflow condition when we deal with http://home.iitj.ac.in/~ramana/ch10-st How grouping is done during underflow in B+, IN B we see the most populous sibling and do grouping and merge it.

asked in Databases Nov 23, 2017

305 views

0 votes

1 answer

25

test series
no of shooting stars per hour is a poisson rv with mean 3.Assume that no of shooting stars in two different hours are independent.Find the probability that at least two shooting starts will occur in given two hours period.

asked in Probability Nov 20, 2017

494 views

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0 answers

26

test series
May anyone please provide an explanation?

asked in Databases Nov 19, 2017

286 views

0 votes

1 answer

27

nptel
Q.2 answer given is only 3 option ,but what i know Time stamp protocol may or may not be recoverable. why 4 option is not correct?

asked in Databases Nov 19, 2017

320 views

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0 answers

28

NPTEL
How can i do this, a not possible,d (dependency of union compatibility),how to choose between b and c

asked in Databases Nov 17, 2017

229 views

0 votes

0 answers

29

Test Series
only one of the following is initiated by the user program all others are initiated by external entities? 1.transition from ready state to running state 2.from running state to ready state 3.from running state to Blocked state 4.from blocked state to ready state.

asked in Operating System Oct 19, 2017

399 views

1 vote

0 answers

30

Test series
The number of page frames that must be allocated to a running process in a virtual memory environment is determined by 1.instruction set architecture 2.page size 3.number of processes in memory 4.physical memory size an answer given is 1.Please guide

asked in Operating System Oct 19, 2017

191 views

0 votes

0 answers

31

test series
#DS suppose you have an array of 128 elements.which number is closest to the minimum number of binary element comparisons that would be necessary to sort the elements is? I am getting 896, as we have 128 elements for each element we take logn comparison because it is unsorted, but the answer is given 891, please guide?

asked in DS Oct 18, 2017

202 views

1 vote

0 answers

32

Notes
How many Simple non-isomorphic graphs are possible with vertices 9, edges 9, and degree of each vertex 2? an answer is given: 2 please guide: But we can make 3 1->a cyclic graph of 9 edge 2-> two cycles one of 5 edge and other of 4 edge 3-> three cycles of 3 edge

asked in Graph Theory Oct 13, 2017

207 views

1 vote

0 answers

33

Notes
How many different (pairwise non-isomorphic trees are there of order 5)?

asked in Graph Theory Oct 12, 2017

451 views

1 vote

1 answer

34

TENSE
My grandfather used (A) / to go (B) / for a walk (C) / every morning. (D) / No error (E) My doubt: The sentence should be in simple present because daily habit is mentioned, but answer is E

asked in Verbal Aptitude Aug 18, 2017

1.3k views

0 votes

1 answer

35

nptel exam ada
Total no of edges =1225 Maximum degree of vertex =3 find no of vertices ?

asked in Graph Theory May 13, 2017

373 views

1 vote

0 answers

36

peter linz
A leaf labelled (epsilon) has no siblings , i.e. a vertex with a child labelled (epsilon) can have no other children.. please help, unable to get it fully

asked in Theory of Computation Apr 29, 2017

177 views

2 votes

3 answers

37

b+ tree
Construct B+ tree , order=4 ->1,4,7,10,17,21,31,25,19,20,28,42 find key value at root node a.7,17 b.17 c.31,42 d.42 please help me ,unable to do insertion in b+ tree

asked in Databases Apr 9, 2017

8.9k views

1 vote

1 answer

38

peter linz .theorem 6.3
LET G be any context-free grammar with (lambda) not in L(G).Then there exist an equivalent grammar G' having no (lambda) production. Q.2-> let G be any CFG without (lambda production). Then there exist a CFG G' that does not have any unit production equivalent to G Unable to understand this

asked in Theory of Computation Mar 31, 2017

1.6k views

1 vote

1 answer

39

pointer
int main(){ int a[5]={1,2,3,4,5}; char *str="hello"; printf("%p %p",a,&a); printf("%p %p",str,&str); } Why in $1$st printf , both the outputs are same($a$,&$a$) And in $2$nd printf ,both the outputs are different(str,&str) please help!

asked in Programming in C Mar 17, 2017

482 views

0 votes

2 answers

40

typedef
typedef int (*test)(float*, float*); test tmp; i am unable to understand the code ,please help!

asked in Programming in C Mar 13, 2017

1.4k views

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