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Questions by Tahoora
User Tahoora
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0
votes
0
answers
1
virtualgate2015 OS
I think C is a more valid answer compared to A. Answer given is A. But the main purpose for User and Super User mode is so that User cannot access all memory/processor hence protection. Dualmode operation forms the basis for ... run in Kernal mode, but this will not provide protection, hence dual mode is used. As far my understanding goes.
asked
3 days
ago
in
Operating System

20
views
virtualgate
testseries
operatingsystem
0
votes
1
answer
2
virtualgate2015 OS
I don't think any of the options is right. What will be the answer?
asked
3 days
ago
in
Operating System

35
views
virtualgate
testseries
operatingsystem
processschedule
mutex
0
votes
1
answer
3
virtualgate2015 OS
This is a numerical question so no options are given. What will be the answer?
asked
3 days
ago
in
Operating System

28
views
virtualgate
testseries
operatingsystem
processschedule
sjf
0
votes
0
answers
4
virtualgate2015 DS
What is the correct answer?
asked
4 days
ago
in
DS

25
views
virtualgate
testseries
datastructure
binarytree
trees
0
votes
0
answers
5
virtualgate 2015 toc
Why is the answer D? How to solve it in simple way other than learning Rice Theorem? Does anyone know Rice thm in short?
asked
4 days
ago
in
Theory of Computation

14
views
virtualgate
testseries
decidability
regularlanguage
turingmachine
0
votes
0
answers
6
virtualgate2015
Answe is B, but why is L2 not regular? How to solve it? For L2, y=x1/n I am not understanding why is this not right?
asked
4 days
ago
in
Theory of Computation

12
views
virtualgate
testseries
toc
regularlanguage
grammar
0
votes
0
answers
7
virtualgate2015 toc
How can L(G) be regular? If we derive bSb > bAcAb, now we have Ab>b but we do not have the production bA since G is all production except last. So there is no production for A or bA. How can we go further?
asked
4 days
ago
in
Theory of Computation

12
views
virtualgate
testseries
contextsensitive
grammar
0
votes
1
answer
8
geeksmocks2017
Four different pens (1, 2, 3, 4) are to be distributed at random in four pen stands marked as 1, 2, 3, 4. What is the probability that none of the pen occupies the place corresponding to its number ? a. 17/18 b. 3/8 c. 1/2 d. 5/8 How will we use the formula for derangements here? Using the direct formula of !n is giving wrong answer.
asked
5 days
ago
in
Numerical Ability

58
views
testseries
geekmock2017
probability
0
votes
1
answer
9
virtualgate2015 algorithm
I think all options are wrong
asked
5 days
ago
in
Algorithms

35
views
virtualgate
testseries
spanningtree
minimumspanningtrees
primsalgorithm
+1
vote
1
answer
10
virtualgate2015
*var2++=*var3++; How will this get evaluated? In general will *var be evaluated first, or will var++ be evaluated? The answer is A, I have run it on IDE but how is it evaluated?
asked
6 days
ago
in
Programming

45
views
virtualgate
programminginc
testseries
0
votes
0
answers
11
virtualgate2015
asked
6 days
ago
in
Programming

14
views
virtualgate
programminginc
testseries
0
votes
0
answers
12
c programming doubt virtualgate2015
asked
6 days
ago
in
Programming

20
views
virtualgate
programminginc
+1
vote
0
answers
13
virtualgate
select * from R where B=R1.A this will select 3 rows (2,1) (3,2) and (4,2) right? If not these what will this query select? As far I know correlated queries work like nested for loop, so how will this work?
asked
Jan 9
in
Databases

13
views
virtualgate
sql
nestedquerywithcorrelation
+1
vote
1
answer
14
virtualgate2015
Number of records per block=512/50=10. Number of blocks for 3000 records will be 300. So 2ndary index will have 300 entries and entry size is 15B. So total size of 2ndary index=300*15=4500B. Total records in 1 block=512/15=34. So for 300 entries we have 300/34=9 blocks. Is this the right approch? I am not getting 89. How to solve this then?
asked
Jan 9
in
Databases

28
views
virtualgate
indexing
#dbms#indexes
+1
vote
2
answers
15
acetestseries
According to my understanding, there should be men and women both in the team. So we can do: 3M and 1W or 2M and 2W or 1M and 3W. So it will be: C(5,3)*C(5,1)+C(5,2)*C(5,2)+C(5,1)*C(5,3). But the answer given is 600. How is it possible?
asked
Jan 7
in
Probability

41
views
acetestseries
testseries
engineeringmathematics
combinatorics
counting
+1
vote
1
answer
16
acetestseries subjecttest
After taking A=0, I am getting x3+1=0 and not x31=0. Is it x3+1=0 or x31=0?
asked
Jan 7
in
Mathematical Logic

45
views
acetestseries
testseries
engineeringmathematics
linearalgebra
0
votes
1
answer
17
ace operating system
Answer given is B, but I think it should be D. Stack will pop the least recently used page from the top. How can having most recently used page on top help in LRU implementation?
asked
Nov 29, 2016
in
Operating System

63
views
operatingsystem
paging
lru
pagereplacement
0
votes
0
answers
18
ace database test series
Answer given is 4 tables: (Employee), (Monitors), (Project, Sponsors) and (Department). Is this answer right?
asked
Nov 24, 2016
in
Databases

39
views
testseries
acetestseries
databases
datadependencies
+1
vote
1
answer
19
ace database
What are the steps to be followed? I decomposed it as: (A,B,C), (A,I), (H,J), (B,D, E, F) and (A,D,G,H). In this too I don't think there is any violation of 3NF. But the answer is C, ie 6 tables. How is it 6? What steps will give me 6?
asked
Nov 24, 2016
in
Databases

34
views
databases
acetestseries
testseries
decomposition
0
votes
0
answers
20
ace database
How to solve this? Do we have to make all possible super keys and then count the unique keys(I did it that way and I am getting 15)? In the solution set it is given: 23 + 23 + 23  22  21  22 +21. How did this come from?
asked
Nov 24, 2016
in
Databases

21
views
databases
acetestseries
testseries
candidatekeys
decomposition
0
votes
1
answer
21
ace computer network
1st seq number is 1093, 2ns seq is 1094, ... 1460th seq number will be 2552. So the ack number sent by the reciever will be 2552+1=2553. Is this right? Answer in solution given is 2554.
asked
Nov 23, 2016
in
Computer Networks

59
views
acetestseries
computernetworks
tcp
0
votes
0
answers
22
ace computer network
From Wikipedia: Reno: If three duplicate ACKs are received, Reno will perform a fast retransmit and skip the slow start phase by instead halving the congestion window (instead of setting it to 1 MSS like Tahoe), ... Recovery. https://en.wikipedia.org/wiki/TCP_congestion_control#TCP_Tahoe_and_Reno So with respect to this what should be the answer?
asked
Nov 23, 2016
in
Computer Networks

30
views
acetestseries
0
votes
1
answer
23
What is the last date for filling online forms for IITB RA course?
asked
Mar 12, 2016
in
Others

135
views
iitbombay
researchassistant
+1
vote
0
answers
24
IIT B cutoffs for RA and chances of what will be the cutoff in 2016?
asked
Feb 26, 2016
in
Others

284
views
iit
iitbombay
normalizedmarks
gaterank
0
votes
1
answer
25
What is the output of the following program ?
asked
Feb 3, 2016
in
Programming & DS

69
views
programminginc
algorithms
0
votes
1
answer
26
What does this question mean?
Is the answer regular because the set is a finite set? Or is it because of some other reason?
asked
Feb 2, 2016
in
Theory of Computation

41
views
theoryofcomputation
0
votes
1
answer
27
Let M range over Turing machine descriptions. Consider the set REG and let the complement of REG be CoREG.
asked
Feb 2, 2016
in
Theory of Computation

36
views
theoryofcomputation
0
votes
1
answer
28
Which of the following is true?
asked
Feb 2, 2016
in
Theory of Computation

51
views
testseries
theoryofcomputation
0
votes
1
answer
29
How to Find inverse of this: (z,*) is a group with a*b=a+b+1 then inverse of a is?
asked
Feb 2, 2016
in
Set Theory & Algebra

44
views
engineeringmathematics
settheory&algebra
+2
votes
2
answers
30
A function is defined over an open interval atleast at one point in this interval, dy/dx is exactly?GATE_2013EC,EE,IN
asked
Feb 2, 2016
in
Calculus

92
views
calculus
engineeringmathematics
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