Q. What are the ways of dealing with deadlock ?

View solution

Q. When transaction Ti requests a data item currently held by Tj , Ti is allowed to wait only if it has a timestamp smaller than that of Tj (that is, Ti is older than Tj ). Otherwise, Ti is rolled back (dies). This is

View solution

Q. When transaction Ti requests a data item currently held by Tj , Ti is allowed to wait only if it has a timestamp larger than that of Tj (that is, Ti is younger than Tj ). Otherwise, Tj is rolled back (Tj is wounded by Ti ). This is

View solution

Q. The deadlock in a set of transaction can be determined by

View solution

Q. A deadlock exists in the system if and only if the wait-for graph contains a ___________.

View solution

Q. Selecting the victim to be rollbacked to the previous state is determined by the minimum cost. The factors determining cost of rollback is

View solution

Q. __________ rollback requires the system to maintain additional information about the state of all the running transactions.

View solution

Q. Which of these is data type long literal?

View solution

Q. Which of the following occurs when a transaction rereads data and finds new rows that were inserted by a command transaction since the prior read?

View solution

Q. A transaction for which all committed changes are permanent is called:

View solution

Q. In this instance, dirty reads are disallowed, while nonrepeatable reads and phantom reads are allowed.

View solution

Q. Which of the following occurs when a transaction rereads data it has previously read and finds modification or deletions caused by a committed transaction?

View solution

Q. A transaction may not always complete its execution successfully. Such a transaction is termed

View solution

Q. Transaction processing is associated with everything below except

View solution

Q. Transaction management ensures ____________ and __________ properties.

View solution

Q. ____________ is an interface between low level database and application program.

View solution

Q. Which of the following are functions of Database Manager ?

1. Interacting with File Manager
2. Creating Queries to Access data
3. Security Enforcement
4. Database Definition and Schema Generation

View solution

Q. Who detects the failure of the system and restore the database to consistent state ?

View solution

Q. A traditional data administrator performs which of the following roles?

View solution

Q. Which of the following is the preferred way to recover a database after a transaction in progress terminates abnormally?

View solution