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0
votes
0
answers
Testbook Test Series  CO question
For the above question wont the answer be option b that is 18 ? My approach : At 1 time, no signal can be activated P0 = 100C0 = 1 At 1 time, 1 signal can be activated P1 = 100C1 = 100 At 1 time, 2 signals can be activated P2 = ... , they are taking the same method https://gateoverflow.in/2754/gate1996225 ? But here in testbook exam answer is given to be 21.
asked
Sep 6, 2019
in
CO & Architecture

40
views
control
computerarchitecture
0
votes
1
answer
Digital Logic  Overflow question and self doubt
Overflow condition can be eliminated in : 1's complement. 2's complement. Signed magnitude. Which of the following is true regarding the above statement : Only i and ii. Only i. Only ii and iii. i,ii and iii. According to me it ... . The question has been asked to me by a local teacher, and not by any coaching institute, so dint mention the source.
asked
Aug 27, 2019
in
Digital Logic

60
views
digitallogic
numbersystem
0
votes
3
answers
Engg. Mathematics CS 2020 Gate Syllabus
In the CS 2020 gate syllabus, only the word integration is mentioned. So, do we just have to consider only Definite and Indefinite integrals or we should be studying on multiple integrals and gamma / beta integration too just like the ECE syllabus ?
asked
Aug 27, 2019
in
Calculus

102
views
0
votes
1
answer
Gateoverflow Question ( Source Gatebook )
https://gateoverflow.in/96566/viewserializable S1: R(A) W(A) W(B) S2: R(A) W(A) R(B) W(B) How many view serializable schedules are possible which are not conflict serializable? (A) 0 (B) 1 (C) 2 (D ... conflictserializableschedules?show=77897#q77897 It is showing the question has been hidden. Can anyone explain to me the actual solution of the question ?
asked
Aug 27, 2019
in
Databases

148
views
databases
0
votes
1
answer
Polygraph test example 2 ( from gateoverflow )  Self Doubt
asked
Aug 26, 2019
in
Databases

43
views
databases
transactions
0
votes
0
answers
Polygraph Test for checking view serializability  Self doubt ( exmple frm gateoverflow )
asked
Aug 26, 2019
in
Databases

48
views
databases
transactions
0
votes
1
answer
Self Doubt  Blind Writes in a Schedule
For the following schedule, how many blind writes are possible ? My answer is total 3 blind writes are possible which I have marked above. Is it correct ?
asked
Aug 26, 2019
in
Databases

58
views
databases
0
votes
1
answer
Gateoverflow question on B+ tree  Self Doubt
https://gateoverflow.in/258022/dbmsbasictest1 Int the above question, as per the diagram, the leaves are supposed to be in level 4 and so the number of children in level 3 which equals to 27 as per calculation means the number of child pointers to level 4 that is the leaf node level is actually 27. Am I correct ?
asked
Aug 23, 2019
in
Databases

54
views
databases
btree
0
votes
0
answers
B tree and B+ tree  Made Easy / Gateoverflow
For the below question, https://gateoverflow.in/285557/madeeasytestseriesdatabasesbtree Can anyone explain option B and option D ? I mean what they actually mean to say ?
asked
Aug 23, 2019
in
Databases

29
views
databases
btree
indexing
0
votes
1
answer
Foreign key  Self Doubt
When it comes to inserting something in a foreign key table, we cant put null values. But when it comes to deleting something from referenced table, we can perform ON DELETE SET NULL operation and make the foreign key value in a particular tuple as NULL. So, a foreign key can’t remain null while inserting but it can be null while deletion. Is my approach correct ?
asked
Aug 21, 2019
in
Databases

94
views
databases
normalization
0
votes
0
answers
View Serializability
Can someone write the entire steps and rules of polygraph test to check view serializability. P.S. : Kindly, dont give me links. Please write the rules in a stepwise manner if known.
asked
Aug 21, 2019
in
Databases

20
views
databases
transactions
0
votes
0
answers
ACE Test Series  Normalization
Regarding statement Q, I don’t think it will violate 3NF because whatever be the R.H.S. if L.H.S. is superkey, then it is in BCNF and ultimately in 3NF. Therefore, it is allowed in 3NF and so the statement is supposed to be right. Is my approach correct ?
asked
Aug 21, 2019
in
Databases

29
views
databases
normalization
0
votes
0
answers
Lossless Decomposition  Self Doubt
https://gateoverflow.in/208190/lossyorlossless In the above question : FDs are AB→C,AC→B,AD→E,B→D,BC→A,E→G. R1 ( ABC ) : AB → C AC → B BC → A R2 ( ACDE ) : AD → E R3 ( ADG ) has empty FDs. So, the above decomposition is not ... a key order to check lossless decomposition ? Do we have 2 consider the closure of original fds to prove AD as key for R3 ( ADG ) ?
asked
Aug 20, 2019
in
Databases

29
views
databases
normalization
0
votes
0
answers
Self Doubt  3NF Decomposition
I know that BCNF may not satisfy dependency preserving but it should be lossless. So, when we are decomposing a relation for satisfying BCNF, we don’t care about the dependency preservation condition. But what about 3NF ? Is it compulsory to check for dependency preservation condition after a table has been decomposed to satisfy 3NF ?
asked
Aug 20, 2019
in
Databases

31
views
databases
normalization
0
votes
0
answers
Definition of Non  trivial FD  DBMS Doubt
Consider the following FDs : Sid → Sname Sname → Age The above set of FD is not  non trivial. I knw da definition of non  trivial in FD is that there should be no common element between X and Y attribute sets in the FD X → Y. ... something in common that is Sname. That is why the set of FDs is not nontrivial. Is my perception towards the FDs correct ?
asked
Aug 19, 2019
in
Databases

59
views
normalization
databases
0
votes
1
answer
Tuple Relational Calculus  Doubt
I know abt universal quantifier ∀ and existential quantifier ∃ . But in tuple relational calculus, how we will interpret by looking at the question when to use ∀ and when to use ∃ ? For example : in the below question, Find the names and ages of ... in the above question, we are using ∃ instead of ∀. My doubt is when shall we apply ∀ and ∃ inTRC questions ?
asked
Aug 16, 2019
in
Databases

53
views
0
votes
1
answer
Relational Algebra  CSE Doubt
I know projection operator in relational algebra eliminates duplicates. But suppose a table contains 2 duplicate rows. Sql retains the duplicates. But what about selection operator in relational algebra. Does it eliminates duplicates ? Moreover ... operator in relational algebra eliminates duplicates or is there any exception too for operators in relational algebra ?
asked
Aug 16, 2019
in
Databases

66
views
0
votes
0
answers
Multilevel Feedback Queue Scheduling  Gateoverflow question
asked
Aug 14, 2019
in
Operating System

149
views
scheduling
0
votes
0
answers
Gateoverflow question machine instruction
https://gateoverflow.in/291233/calculatenumberoftimeszeroflagisreset Can someone explain to me the entire approach and ultimately the final answer ?
asked
Aug 13, 2019
in
CO & Architecture

33
views
coandarchitecture
0
votes
0
answers
Gateoverflow question  doubt
https://gateoverflow.in/311001/deletionofuselesssymbolsfromagrammarselfdoubt In the above question aren’t we supposed to delete the production A → b because at the end after removing the useless symbols, A is unreachable from the start symbol S. So, wont be the answer S → a only after removing useless symbols ?
asked
Aug 12, 2019
in
Theory of Computation

40
views
theoryofcomputation
cfg
0
votes
0
answers
ACE Workbook  Finite automata and Regular Language
asked
Aug 11, 2019
in
Theory of Computation

37
views
theoryofcomputation
regularlanguage
finiteautomata
0
votes
0
answers
Made Easy workbook  Finite Automata
While doing reversal of a Finite automata, we change the arrows and interchange the final and initial states. But if there are more than one final state in F.A. are we supposed to merge the final states into one final state and then do the reversal of the finite automata. Is it the correct procedure for reversal of finite automata wth multiple final states ?
asked
Aug 11, 2019
in
Theory of Computation

67
views
regularlanguage
theoryofcomputation
finiteautomata
0
votes
1
answer
NFA with epsilon moves  Automata theory ( Testbook Test Series )
asked
Aug 11, 2019
in
Theory of Computation

37
views
theoryofcomputation
finiteautomata
regularlanguage
+1
vote
1
answer
Regular Language  Theory of Computation
Which of the following are regular languages ? $wxw^R ( w ∈ (a,b)^* , x ∈ (a,b)^* )$ $wxw^R ( w ∈ (a,b)^* , x ∈ (a,b)^+ )$ $wxw^R ( w ∈ (a,b)^+ , x ∈ (a,b)^* )$ $wxw^R ( w ∈ (a,b)^+ , x ∈ (a,b)^+ )$ $wxw ( w ∈ (a,b)^* , x ∈ (a,b)^* )$ ... $wxw ( w ∈ (a,b)^+ , x ∈ (a,b)^* )$ $wxw ( w ∈ (a,b)^+ , x ∈ (a,b)^+ )$ Here $w^R$ is reversal of string $w$.
asked
Aug 9, 2019
in
Theory of Computation

31
views
theoryofcomputation
finiteautomata
regularlanguage
0
votes
0
answers
ACE Test Series  Finite automata and regular language
asked
Aug 8, 2019
in
Theory of Computation

65
views
theoryofcomputation
finiteautomata
regularlanguage
0
votes
0
answers
Group theory  order of non abelian
Let G be a non abelian group, order of G can be 24 44 54 34 Can someone explain ?
asked
Aug 8, 2019
in
Linear Algebra

31
views
discretemaths
grouptheory
0
votes
2
answers
Digital logic doubt
Kmap can be used upto n variables. What is the value of n ? Is it 5 ?
asked
Aug 7, 2019
in
Digital Logic

60
views
digitallogic
booleanalgebra
0
votes
0
answers
Made easy subject test  CPU scheduling
Acc. to me both FCFS and SRTF are fetching the same avg. waiting time and it is minimum compared to RR. so, it would be option D. But it is given that option D is wrong. So, what is the correct answer ?
asked
Aug 5, 2019
in
Operating System

39
views
0
votes
1
answer
Gate 2018  First Order Logic
Consider the firstorder logic sentence φ ≡ ∃s∃t∃u∀v∀w∀x∀y ψ(s,t, u, v, w, x, y) where ψ(s,t, u, v, w, x, y) is a quantifierfree firstorder logic formula using only predicate symbols, and possibly equality, but no function ... of size equal to 7. Can anyone tell me the entire thing with an elaborate and proper explanation from the basic regarding this question.
asked
Aug 4, 2019
in
Mathematical Logic

122
views
discretemaths
propositionallogic
0
votes
1
answer
Ace Test series : Computer Networks ( Packetization )
asked
Aug 2, 2019
in
Computer Networks

76
views
computernetworks
computernetwork
protocols
0
votes
1
answer
Universal and existential quantifier
Generally, universal quantifier i.e. ∀ is followed by an implication in a sentence and existential quantifier is followed by an AND operation in a sentence. Can anyone give an example of a sentence where universal quantifier is followed by AND operator and existential quantifier is followed by an implication ?
asked
Jul 30, 2019
in
Mathematical Logic

28
views
0
votes
0
answers
Computer Networks  UDP and TCP doubt
UDP provides error control mechanism. According to me, statement is false because it uses checksum to detect errors but it cannot control it unlike TCP. Is my statement correct ? If not please give appropriate reasons for the answer of the given statement.
asked
Jul 30, 2019
in
Computer Networks

13
views
computernetwork
tcp
protocols
0
votes
1
answer
Propositional Logic and First order logic
Consider the following pairs of statements : Pair 1 : There exist a student who has not visited Dakota. Not all students have visited Dakota. Pair 2 : There does not exist a student who has visited Dakota. All students have not ... . Both Pair 1 statements and Pair 2 statements are equivalent. Nether Pair 1 statements nor Pair 2 statements are equivalent.
asked
Jul 29, 2019
in
Mathematical Logic

91
views
discretemaths
propositionallogic
0
votes
0
answers
Persistent and nonpersistent CSMA
Consider A lives in Delhi, connected to the internet via a 100 Mbps connection retrieve a 250 KB webpage from server in Chennai where page contain 3 images of 500 KB each. Assume one way propagation delay is 75ms and A's access link is ... and T2? Can anyone show how to approoach for both ? Ref : https://gateoverflow.in/284688/persistentandnonpersistenthttp
asked
Jul 29, 2019
in
Computer Networks

102
views
computernetworks
csmacd
accesscontrol
0
votes
0
answers
Point to Point Protocol
How Point to Point protocol provides connection oriented services ?
asked
Jul 22, 2019
in
Computer Networks

20
views
computernetwork
protocols
0
votes
0
answers
Flow Control  Made Easy workbook
What is the total overhead bits ( header and retransmission ) with data frames consisting of 40 bits header and 3960 data bits. ACK frames never occur. NAK frames are 40 bits, the error rate for frame is 2 % and for NAK frame is negligible ... anyone explain how the answer is coming to be 120.8 bits and more importantly, how the overhead for NAK is calculated ?
asked
Jul 19, 2019
in
Computer Networks

46
views
computernetworks
datalinklayer
0
votes
0
answers
Made Easy Workbook Sequential Circuit
In the below question no. 2 , the initial state is given as per solution is Q0 = 1 , Q1 = 0 , Q2 = 0 . Can anyone show the circuit table and what will be the final answer ?
asked
Jul 18, 2019
in
Digital Logic

13
views
0
votes
1
answer
Gate 2000 multiset and set theory
A multiset is an unordered collection of elements where elements may repeat any number of times. The size of a multiset is the number of elements in it, counting repetitions. What is the number of multisets of size 4 that can be constructed ... elements so that at least one element occurs exactly twice? Can someone explain the answer with an example of a multiset ?
asked
Jul 17, 2019
in
Set Theory & Algebra

48
views
0
votes
0
answers
Made Easy workbook Ethernet ( True / False )
Which of the following statements is false ? In Ethernet, each node's physical address is guaranteed to be globally unique. The single parity check can detect any odd number of bit errors in a transmitted codeword. In Ethernet a node wishing to ... . None of these. Given answer is option D. But my query is in which situation does option C remain true ?
asked
Jul 17, 2019
in
Computer Networks

21
views
0
votes
0
answers
JAM signal CSMA/CD Gradeup question
Can anyone explain the answer with reason .
asked
Jul 17, 2019
in
Computer Networks

49
views
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