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Which of the following allows dirty reads, nonrepeatable reads and phantom reads to occur?
In this instance, dirty reads are disallowed, while nonrepeatable reads and phantom reads are allowed.
Dirty read, nonrepeatable, and phantom reads are not possible in this instance.
Four engineers, designated as CE, SE, EE and AE, read a certain number of newspapers early in the morning. One of them reads four newspapers, another reads three newspapers, the third reads two newspapers while the fourth one reads one newspaper. Below are some additional facts regarding the names of these officers. a) N is not the EE b) H is the AE c) N is not the CE and he reads more number of newspapers than L d) The one who is the CE reads more number of newspapers than L e) The person who is the SE reads the maximum number of newspapers f) B does not read two newspapers Which of the following statements is necessarily true?
Two newspapers A and B are published in a city. It is known that 25% of the city population reads A and 20% reads B while 8% reads both A and B. Further, 30% of those who read A but not B look into advertisements and 40% of those who read B but not A also look into advertisements, while 50% of those who read both A and B look into advertisements. Then the percentage of the population who look into advertisements is:
In Bengaluru, only two newspapers The Hindu and The Times of India are published. It is known that 25% of the city population reads The Hindu and 20% reads The Times of India while 8% reads both the newspapers. It is also known that 30% of those who read The Hindu but not The Times of India look into advertisement and 40% of those who read The Times of India but not The Hindu look into advertisement while 50% of those who read both the newspapers look into advertisements. What is the percentage of the population who read an advertisement?
Aayu, Jayu, Miyu and Keya all have different taste in literature. One reads novels, one reads poetry, one reads science fictions and one reads stories. Using following information select the type of literature enjoyed by Miyu. The novel fan has asked by Jayu to help her to collect data for Miyu. Miyu and Jayu are working on the project along with the person who enjoys science fictions. Both Keya and fan of novels are in the same class as the person who enjoys story reading. Miyu and Anu are not in the same class.
Consider the following schedule S of transactions T1, T2, T3, T4: T1 T2 T3 T4   Reads(X)         Writes(X) Commit   Writes(X)  Commit         Writes(Y) Reads(Z) Commit           Reads(X) Reads(Y) Commit   Which one of the following statements is CORRECT?
You develop an enterprise application, called XYZApplication that includes a Windows Form presentation layer, middle-tier components for business logic and data access, and a Microsoft SQL Server database.
You are in the process of creating a middle-tier component that will execute the data access routines in your application. When data is passed to this component, the component will call several SQL Server stored procedures to perform database updates. All of these procedure calls run under the control of a single transaction.
The code for the middle-tier component will implement the following objects:
SqlConnection cn = new SqlConnection();
SqlTransaction tr;
If two users try to update the same data concurrently, inconsistencies such as phantom reads will occur. You must now add code to your component to specify the highest possible level of protection against such inconsistencies.
Which code segment should you use?
__________ scheme that records only information about dirty pages and associated information and does not even require of writing dirty pages to disk.