When a transaction T is committed, two-phase commit guarantees that all sites agree on whether the transaction should be committed or aborted. Assume that there are three places to choose from. During the transaction, C1 coordinates with C2 and C3 by sending the message Prepare T, which is received by both of them. After that, C2 and C3 respond to C1 with Ready T. Interestingly, only one of the two computers, C2, has the Commit T log record in its stable storage for some reason. Consider the following scenario: C1 fails soon after 2 has written the necessary log entries to stable storage. During his recovery, C1 is required to participate in certain activities. Explain the fate of transaction T by identifying the additional log entries on C2 and C3 that were created.

Q: Part A: There are two different friends who want to send some informative data to each other. A…

A: Given: There are two different friends who want to send some informative data to each other. A…

Q: Transaction T2 Transaction T3 R2(B) R3(B) W2(A) W3(C)

A: Here is the solution which is mentioned below:

Q: Question 4. A sealed-bid auction is a process where a number of partiescalled bidders submit sealed…

A: To achieve the specified security properties in the auction protocol, we can design a three-phase…

Q: A system has 12 resources of A type, 14 resources of B type and 15 resources of C type. Apply…

A: Here in this question we have asked to apply bankers algorithm on this..and find safe sequence if…

Q: Consider the following two transactions: T1 R(A), W(A), R(B), RIC) T2- W(C), R(B), R(A). W(B) Say…

A: Explanation: Strict 2PL is guaranteed conflict serializability and not just 2PL.

Q: Part A: There are two different friends who want to send some informative data to each other. A…

A: Communication Protocols:ENQ/ACK and Poll/Select: These are communication protocols used to establish…

Q: Databases course Here is a schedule with one action missing:  R1(C); W2(D); R2(B); ???; W1(A);…

A: Here in this question we have given a schedule  R1(C); W2(D); R2(B); ???; W1(A); R3(D); W2(C); W3(B)…

Q: - A password is 6 characters in length, and there 17 different characters from which we can select.…

A: Given:

Q: Describe the flaw in this argument: Consider the following attack against one-time pad: upon…

A: According to the information given:- We have to describe the  one-time pad ciphertext.

Q: For the follow schedule with the given initial values, decide whether a. the schedule is…

A: Given schedule contains 3 transactions, that are T1, T2 and T3. The given transactions contains read…

Q: To achieve consistency, the players have to reach an agreement on the game state. However, this…

A: Instant messengers are unreliable, and messages are likely to be lost, delayed, or intercepted by…

Q: City of Byte land can be described as a 2D grid of cells. Each cell máy or may not contain a demon.…

A: for i in range(int(input())):#inputting number of test cases    l=[]#defining the list…

Q: (e) A file is protected by a random password consisting of n binary bits. All password combinations…

A: Answer: We need to write the what how many bits should be specified so we will see in the more…

Q: You are given a rundown of n whole numbers. You can play out the accompanying activity: you pick a…

A: In this question, we are asked to write a program to find the such minimum arrangement Logic: We…

Q: Write a program invoking the above two functions to show how you can use a password to register a…

A: Code: # Function to check the length of passworddef check_length(password):      """ Function checks…

Q: Consider the following schedule that performs actions taken by transactions 71 and T2 on data items…

A: To answer this question, we first need to understand what a database schedule is and what makes a…

Q: Consider a server that has 20 users, each of which has 50 files in their home directory. Each user…

A: Directory and file permissions on UNIX or Linux machines are set and can be changed by the user.…

Q: Test a discount system in some e-shop. The system can send a loyalty card to a client and admit a…

A: Here is a decision table for the discount system: Condition Registered User Total Spent Number of…

Q: Why might "last commit wins" strategy be problematic in certain transactional scenarios?

A: The "last commit wins" strategy refers to a situation where conflicting updates to a shared resource…

Q: Following the notation seen in class, we have a block cipher that is chained in this way: = Pe XOR…

A: MAC assist block chaining message authentication (CBC) residue. MAC also assists the continuous XOR…

Q: Site S, executes the following three steps to invoke mutual exclusion: Step 1: (Request Critical…

A: execution of given steps to invoke mutual exclusive is in next step:

Q: We are given the following transaction schedule, where A,B,C are the addresses of the records in the…

A: Concurrency control is the process of managing simultaneous access to shared data in a multi-user…

Q: Consider this schedule: T2:R(X), T2:W(X), T1:W(X), T1:R(Y), T1:W(Y), T2:Commit, T1:Commit Select the…

A: In database theory, serializability is a property of a schedule of transactions that ensures the…

Q: Two-phase commit ensures that all sites agree on whether a transaction T should commit or abort.…

A: Given that: Two-phase commit ensures that all sites agree on whether a transaction T should commit…

Q: Explain the requirements on both the sender side and the receiver side that will ensure both the…

A: Solution 1) Let's see what are the requirements needed on both the sender side and the receiver side…

Q: 33. Lamport's one-time password scheme users the passwords in reverse order. Would it not be simpler…

A: First of all let's understand the mechanism of lamport's OTP mechanism.  It use the transforming…

Q: Here, we'll use a database used by an airline as an illustration of how "snapshot isolation" works.…

A: In today's fast-paced world, where people expect instant results and quick turnarounds, having a…

Q: Cryptographic Data Objects B has just received the following message, which represents a…

A: e because, first attempt: a protocol that consists of 3 messages 1.A −→ S : A, B 1. A contacts S by…

Q: If we apply a distributed version of the multiple-granularity protocol of Chapter 18 to a…

A: Given: if we apply a distributed version of the multiple-granularity protocol of Chapter 18 to a…