Recent questions tagged concurrency / GATE Overflow for GATE CSE

0 votes

2 answers

61

cocurrency control

Sanjay Sharma

357 views

Sanjay Sharma asked May 4, 2016

3 votes

0 answers

62

No of operation to make schedule non serializable.
Consider the following schedule S: r1(B);w2(C);????;w3(C);w1(D);w2(E) The possible operations on S are read, write, Increment, Multiply respectively (Increment, Multiply by constant) 1. How many actions can be placed in the given schedule S ... placed in the given schedule S such that S become non-serializable as T2→T1 a) 5 b) 7 c) 9 d)11

Consider the following scheduleS: r1(B);w2(C);????;w3(C);w1(D);w2(E)The possible operations on S are read, write, Increment, Multiply respectively (Increment, Multiply b...

sharma.abhilasha

349 views

sharma.abhilasha asked Dec 5, 2015

0 votes

1 answer

63

Consistency preservation

Shefali

442 views

Shefali asked Oct 10, 2015

0 votes

1 answer

64

Question on Bersteins condition
Let S1: a = x + y and S2: b = z + 1 Then R(S1) = {x, y}, R(S2) = {z}; similarly W(S1) = a and W(S2) = b. Which of the following is true? Bernstein's conditions are not ... conditions are not satisfied, so statements are not executed concurrently. Bernstein's conditions are satisfied, hence statements are executed concurrently. None of these.

Let S1: a = x + y and S2: b = z + 1Then R(S1) = {x, y}, R(S2) = {z}; similarly W(S1) = a and W(S2) = b.Which of the following is true? Bernstein's conditions are not s...

Kitty Kat

1.2k views

Kitty Kat asked Oct 8, 2015

1 votes

2 answers

65

Concurrency Problems
T1 T2 R(A) R(A) R(B) R(B) W(A) COMMIT R(A) W(A) COMMIT in the above problem identify the concurrency in the following Schedule involving 2 Transaction T1 AND T2 (r: read and w : write ) a) Dirty Read problem b) Unrepeatable Read problem c) Lost update Problem d) Both a and b

T1T2R(A) R(A) R(B) R(B) W(A) COMMIT R(A) W(A) COMMIT in the above problem identify the concurrency in the following Schedule involving 2 Transaction T1 AND T2 (r: r...

spriti1991

1.0k views

spriti1991 asked May 6, 2015

0 votes

1 answer

66

Given a code snippet as question,are there any fast tricks to Test the three neccesary conditions for the process synchonization.

saurabhnaik

691 views

saurabhnaik asked Nov 3, 2014

1 votes

2 answers

67

Concurrency
Consider the following sequential code which is executed in a multiprogramming mode by assuming that each statement can execute independently to achieve the concurrency. If any statement dependent on other statements then those statements will be executed in the order. S1: a = b + c; ... execute concurrently at the beginning of execution? a)S3 and S4 b)S2 and S3 c)S1 and S2 d)S2 and S4

Consider the following sequential code which is executed in a multiprogramming mode by assuming that each statement can execute independently to achieve the concurrency. ...

Keith Kr

1.2k views

Keith Kr asked Oct 1, 2014

10 votes

2 answers

68

GATE CSE 1992 | Question: 12-a
Draw the precedence graph for the concurrent program given below S1 parbegin begin S2:S4 end; begin S3; parbegin S5; begin S6:S8 end parend end; S7 parend; S9

Draw the precedence graph for the concurrent program given belowS1 parbegin begin S2:S4 end; begin S3; parbegin S5; begin S6:S8 end parend end; S7 parend; S9

Kathleen

3.5k views

Kathleen asked Sep 13, 2014

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