Four transactions are presently running: (The abbreviation R(A) means Read(A), and so on) • T1: R(A),R(B),R(J),W(A),W(B),R(D),R(E),R(G)...
Four transactions are presently running: (The abbreviation R(A) means Read(A), and so on)
• T1: R(A),R(B),R(J),W(A),W(B),R(D),R(E),R(G)
• T2: R(C),R(G),W(C),R(H),W(H),R(D)
• T3: W(J),R(C),W(C)
• T4: R(G),W(D),R(J)
The following is a schedule for these transactions.
T1:R(A), T4:R(G), T3:W(J), T1:R(B), T1:R(J), T1:W(A), T3:R(C),
T3:W(C), T2:R(C), T2:R(G), T1:W(B), T1:R(D), T2:W(C), T1:R(E),
T1:R(G), T2:R(H), T2:W(H), T4:W(D), T4:R(J), T2:R(D)
1. List all conflicts in these transactions.
2. Is the schedule conflict serializable? If it is, to which serial
schedule(s) is it equivalent?
Homework Answers
Add Answer to:
Four transactions are presently running: (The abbreviation R(A)
means Read(A), and so on)
• T1: R(A),R(B),R(J),W(A),W(B),R(D),R(E),R(G)...
For the system given in figure 3 identify if schedule 2 is conflict equivalent and view...
For the system given in figure 3 identify if schedule 2 is conflict equivalent and view equivalent to schedule 1. Give proper reasons for you answer. Resolve the issues in schedule 2 by adopting appropriate locking scheme and apply deadlock prevention scheme to ensure prevention of deadlocks and starvation. (7) Table 2:Serial Schedule 1 T1 T2 T3 T4 T5 Read(X) Read(Z) Read(Y) Write(Z) ...
2. Given the following three transactions T1 = r1(x); w1(y); T2 = r2(z); r2(y); w2(y); w2(x); T3 ...
2. Given the following three transactions T1 = r1(x); w1(y); T2 = r2(z); r2(y); w2(y); w2(x); T3 = r3(z); w3(x); r3(y); Consider the schedule S = r1(x); r3(z); r2(z); w3(x); r2(y); r3(y); w2(y); w1(y); w2(x); a. Draw the precedence graph of schedule S, and label each edge with data item(s). b. Based on the precedence graph, determine whether S is conflict serializable and justify your answer. If it is serializable, specify all possible equivalent serial schedule(s).
Q2 [10 pts] Given the following schedule Check the following: T2 RID) T1 T3 R(D) R(C)...
Q2 [10 pts] Given the following schedule Check the following: T2 RID) T1 T3 R(D) R(C) WO)) R(C) WO)) commit commit commit a. Is this schedule serializable? b. Is this schedule recoverable? c. Is this schedule cascadeless?
4. R(A, B, C, D, E, F, G, H, I, J) where A → B, C,...
4. R(A, B, C, D, E, F, G, H, I, J) where A → B, C, D BE F→ G, H, I (A, F) → B, C, D, E, G, H, I, J For each of the following relations, normalize it into a set of BCNF relations.
Q3: Given a relational schema R = {A,B,C,D,E,F,G,H,1,J,K} and a set of functional dependencies F {A...
Q3: Given a relational schema R = {A,B,C,D,E,F,G,H,1,J,K} and a set of functional dependencies F {A B C D E, E F G H I J,AI →K} and a key(R) = AI = 1. Is R in BCNF? If yes, justify your answer [5 points] 2. If no, explain why and decompose R for two levels only [10 points] 3. Check whether the decomposition in step 2 dependency preserved or not [5 points]
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a=12m b=13m c=17m T1=549(N.m) e=0.10(rad) d=100mm G=16Gpa Q2) The solid shaft having a diameter d is...
a=12m b=13m c=17m T1=549(N.m)
e=0.10(rad) d=100mm G=16Gpa
Q2) The solid shaft having a diameter d is fixed at end D. For a given rotation angle at C (clockwise when viewed from right side), denoted by e, and applied torque T1, determine the torque T2 if a- While end A is free allowed to rotate). b- While end A is fixed C- Also, Calculate shear stress at segments BC while end A is fixed. We were unable to transcribe this image
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Imagine a single poorly-designed table, r(R), with attributes A, B, C, D, E, F, G, H, I, J, K, L, M. You’ve looked over the naughty designer’s work and come up with the following logical functional dependencies. A —> {B, D, F}? B —> {G, H, I}? {A, C} —> {E, J, K}? {J, K} —> {L, M} H is a composite attribute group with 3 attributes; H1, H2, H3. H3 is a multivalued attribute. L is a multivalued attribute....
4. E G > G. b) Given the block diagram as shown, R and D are...
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A chromosome with genetic markers A, B, C, D, E, F, G, H, I and J...
A chromosome with genetic markers A, B, C, D, E, F, G, H, I and J ( “*” represents the centromere ) is shown below: A B C D E * F G H I J Another chromosome is found to contain a b c d i h g f * e j If these two chromosomes are paired during meiosis, a single crossover takes place between F and G, and another single crossover takes place between H and I....
Q2 [10 pts] Given the following schedule Check the following: T2 RID) T1 T3 R(D) R(C) WO)) R(C) WO)) commit commit commit a. Is this schedule serializable? b. Is this schedule recoverable? c. Is this schedule cascadeless?
4. R(A, B, C, D, E, F, G, H, I, J) where A → B, C, D BE F→ G, H, I (A, F) → B, C, D, E, G, H, I, J For each of the following relations, normalize it into a set of BCNF relations.
Q3: Given a relational schema R = {A,B,C,D,E,F,G,H,1,J,K} and a set of functional dependencies F {A B C D E, E F G H I J,AI →K} and a key(R) = AI = 1. Is R in BCNF? If yes, justify your answer [5 points] 2. If no, explain why and decompose R for two levels only [10 points] 3. Check whether the decomposition in step 2 dependency preserved or not [5 points]
a=12m b=13m c=17m T1=549(N.m)
e=0.10(rad) d=100mm G=16Gpa
Q2) The solid shaft having a diameter d is fixed at end D. For a given rotation angle at C (clockwise when viewed from right side), denoted by e, and applied torque T1, determine the torque T2 if a- While end A is free allowed to rotate). b- While end A is fixed C- Also, Calculate shear stress at segments BC while end A is fixed. We were unable to transcribe this image
4. E G > G. b) Given the block diagram as shown, R and D are inputs and G, G, and H, are transfer functions. a) Using only the block diagram reduction R с method*, find the transfer function C/R in terms of G, G, and Hz. H, Using only the block diagram reduction method*, find the transfer function E/D in terms of G, G,, and Hy c) Using either the block diagram reduction method* or the equation method, find...
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