Consider following schedules involving two transactions: S1: r1(X); r1(Y); r2(X); r2(Y); w2(Y); w1(X) S2: r1(X); r2(X); r2(Y); w2(Y); r1(Y); w1(X) Which of the following statement is true? (1) Both S1 and S2 are conflict serializable. (2) S1 is conflict serializable and S2 is not conflict serializable. (3) S1 is not conflict serializable and S2 is conflict serializable. (4) Both S1 and S2 are not conflict serializable.

Consider following schedules involving two transactions:

S1: r1(X); r1(Y); r2(X); r2(Y); w2(Y); w1(X)

S2: r1(X); r2(X); r2(Y); w2(Y); r1(Y); w1(X)

Which of the following statement is true?

(1) Both S1 and S2 are conflict serializable.

(2) S1 is conflict serializable and S2 is not conflict serializable.

(3) S1 is not conflict serializable and S2 is conflict serializable.

(4) Both S1 and S2 are not conflict serializable.
by

1 Answer

Answer :

S1 is not conflict serializable and S2 is conflict serializable.
by

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Description : The direction of rotation of the winch shown in the illustration is changed by reversing the _____________. EL-0102 A. direction of current through the shunt field B. polarity of voltage at 'S1' and 'S2' C. direction of current through the armature D. polarity of voltage at 'L1' and 'L2'

Last Answer : Answer: C

S1 and S2 are the draw downs in an observation well at times t1 and t2 after pumping. For discharge Q and coefficient of transmissibility T, the relationship, is (A) S2 - S1 = (2.3Q/ ) log10 (t2/t1) (B) S2 - S1 = (2.3Q/4 ) log10 (t2/t1) (C) S2 - S1 = (2.3Q/4 ) loge (t2/t1) (D) S2 - S1 = (2.3Q/4 ) loge (t1/t2

Description : S1 and S2 are the draw downs in an observation well at times t1 and t2 after pumping. For  discharge Q and coefficient of transmissibility T, the relationship, is  (A) S2 - S1 = (2.3Q/ ) log10 (t2/t1)  (B) S2 - S1 ... - S1 = (2.3Q/4 ) loge (t2/t1)  (D) S2 - S1 = (2.3Q/4 ) loge (t1/t2

Last Answer : (B) S2 - S1 = (2.3Q/4 ) log10 (t2/t1) 

the derivation of Thiem's formula, Q = (S1 - S2)/[2.3 log10( / )] the following assumption is not applicable (A) The aquifer is homogeneous and isotropic (B) Flow lines are radial and horizontal (C) The slope of the water surface is too small (D) The well has been sunk up to the surface of the unconfined aquifer

Description : the derivation of Thiem's formula, Q = (S1 - S2)/[2.3 log10( / )] the following assumption is not applicable (A) The aquifer is homogeneous and isotropic (B) Flow lines are radial and ... the water surface is too small (D) The well has been sunk up to the surface of the unconfined aquifer

Last Answer : Answer: Option D

With the inputs shown below, what will be the output of S1, S2, and C2?

Description : With the inputs shown below, what will be the output of S1, S2, and C2?

Last Answer : MSD of the sum.

32 With S2 closed and S1 open, the current waveform in the delta winding will be [GATE 2009] A. a sinusoidal at fundamental frequency B. flat-topped with third harmonic C. only third-harmonic D. none of these

Description : 32 With S2 closed and S1 open, the current waveform in the delta winding will be [GATE 2009] A. a sinusoidal at fundamental frequency B. flat-topped with third harmonic C. only third-harmonic D. none of these

Last Answer : C. Only third harmonic

The illustrated circuit is a wheatstone bridge. If the meter 'G' reads 0 with the switch closed then ________. EL-0024 A. the current through R1 - R2 is equal to the current through R3 - Rx B. the voltage across b - d is equal to the voltage of E C. the resistance of Rx is equal to the resistance of R2 D. all the above are true

Description : The illustrated circuit is a wheatstone bridge. If the meter 'G' reads 0 with the switch closed then ________. EL-0024 A. the current through R1 - R2 is equal to the current through R3 - Rx B. the voltage ... of E C. the resistance of Rx is equal to the resistance of R2 D. all the above are true

Last Answer : Answer: A

Which of the following statements is true? (1) The sentence S is a logical consequence of S1,..., Sn if and only if S1˄S2˄........˄Sn→S is satisfiable. (2) The sentence S is a logical consequence of S1,..., Sn if and only if S1˄S2˄........˄Sn→S is valid. (3) The sentence S is a logical consequence of S1,..., Sn if and only if S1˄S2˄........˄Sn˄¬S is consistent. (4) The sentence S is a logical consequence of S1,..., Sn if and only if S1˄S2˄........˄Sn˄S is inconsistent.

Description : Which of the following statements is true? (1) The sentence S is a logical consequence of S1,..., Sn if and only if S1˄S2˄........˄Sn→S is satisfiable. (2) The sentence S is a logical consequence of ... S is a logical consequence of S1,..., Sn if and only if S1˄S2˄........˄Sn˄S is inconsistent.

Last Answer : The sentence S is a logical consequence of S1,..., Sn if and only if S1˄S2˄........˄Sn→S is valid.

If is the rugosity coefficient, is the bed slope of sewer, the velocity of flow in m/sec may be obtained by the formula V = (1/n) r2/3 s1/2 evolved by A. Chezy B. Manning C. Bazin D. Kutter

Description : If is the rugosity coefficient, is the bed slope of sewer, the velocity of flow in m/sec may be obtained by the formula V = (1/n) r2/3 s1/2 evolved by A. Chezy B. Manning C. Bazin D. Kutter

Last Answer : ANS: B