Explore topic-wise MCQs in Engineering.

Views constructed from SQL SELECT statements that conform to the SQL-92 standard may not contain:

The size of a lock is called:

Dirty read, nonrepeatable, and phantom reads are not possible in this instance.

A transaction in which either all of the database actions occur or none of them do is called:

Which of the following occurs when one transaction reads a changed record that has not been committed to the database?

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

What is the overall responsibility of the DBA?

Locks placed by the DBMS are called ________ .

Which of the following allows dirty reads, nonrepeatable reads and phantom reads to occur?

SQL Server 2000 stored procedures can:

Which of the following refers to a cursor type that when the cursor is opened, a primary key value is saved for each row in the recordset; when the application accesses a row, the key is used to fetch the current values of the row?

Which of the following refers to a cursor type where changes of any type and from any source are visible?

Which of the following disallows both dirty reads and nonrepeatable reads, but allows phantom reads?

One solution to the multivalued dependency constraint problem is to:

Which type of SQL Server cursor concurrency places an update lock on a row when the row is read?

Which of the following is a way to create and modify tables using SQL Server?

With which type of SQL Server recovery model, is no logging done?

With this type of index, the bottom level of an index does not contain data, but rather it contains pointers to data.

With which type of SQL Server recovery model are all database changes logged?

SQL Server program code that is executed after an SQL command has been processed is called a(n):

With this type of SQL Server cursor concurrency no lock is obtained until the user updates the data.

With this type of index, the data are stored in the bottom level of the index and in the same order as that index.

Which of the following is a group of one or more attributes that uniquely identifies a row?

In SQL Server 2000, which of the following makes a copy of the changes that have been made to the database since the last complete backup?

When the values in one or more attributes being used as a foreign key must exist in another set of one or more attributes in another table, we have created a(n):

A functional dependency is a relationship between or among:

For some relations, changing the data can have undesirable consequences called:

An attribute is a(n):

The advantage of optimistic locking is that:

A tuple is a(n):

Table is synonymous with the term:

Which of the following is not a restriction for a table to be a relation?

A key:

When using the SQL INSERT statement:

What is not an advantage of stored procedures?

A reason for using an SQL view to hide columns is:

The SQL ALTER statement can be used to:

To update an SQL view, the DBMS must be able to associate the column(s) to be updated with:

Which of the following is NOT a type of SQL constraint?

A ________ is a program that performs some common action on database data and that is stored in the database.

For what purposes are views used?

Which type of entity is related to two or more associated entities that each contain specialized attributes that apply to some but not all of the instances of the entity?

In which of the following is a single-entity instance of one type of related to a single-entity instance of another type?

Entities can be associated with one another in which of the following?

Properties that describe the characteristics of entities are called:

The strictest transaction isolation level provided by SQL Server is called:

In which of the following can many entity instances of one type be related to many entity instances of another type?

SQL Server program code that is executed instead of an SQL command that needs to be processed is called a(n):

Which of the following locks the item from change but not from read?

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