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Database Management System (DBMS) Practice Test: All Topics
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A DBMS (Database Management System) is a software application that helps create and manage databases. Popular DBMS are MySQL, Oracle, MongoDB, etc.  The sum total of the database, the DBMS and the associated applications can be referred to as a database system. Often the term "database" is also used loosely to refer to any of the DBMS, the database system or an application associated with the database. Existing DBMSs provide various functions that allow management of a database and its data which can be classified into four main functional groups: Data definition – Creation, modification... Show more
Database Management System (DBMS) Practice Test: All Topics
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25 Questions

1. To select all columns from the table the syntax is:
2. In magnetic disk _____________ stores information on a sector magnetically as reversals of the direction of magnetization of the magnetic material.
3. Once the lower-level lock is released, the operation cannot be undone by using the old values of updated data items, and must instead be undone by executing a compensating operation; such an operation is called
4. Which is a unary operation:
5. Which of the following has “all-or-none” property?
6. Which command creates database objects like tables, views and indexes:
7. A _____________ in a table represents a relationship among a set of values.
8. means that the data used during the execution of a transaction cannot be used by a second transaction until the first one is completed.
9. The _____________is that part of main memory available for storage of copies of disk blocks.
10. The............. operation allows the combining of two relations by merging pairs of tuples, one from each relation, into a single tuple.
11. In a database system there is:
12. In 2NF
13. Which of the following is true regarding views?
14. How many JDBC driver types does Sun define?
15. The entity relationship set is represented in E-R diagram as
16. Why do we need concurrency control on B+ trees ?
17. The actions which are played in the order while recording it is called _____________............. history.
18. Lost update problem is
19. .............. clause is an additional filter that is applied to the result."
20. Which function is used to find the count of distinct departments?
21. A command to remove a relation from an SQL database
22. Not applicable condition can be represented in relation entry as
23. Which is the central component of the DBMS software that can also be termed as the database control system?
24. Ranking of queries is done by which of the following?
25. A lock that allows concurrent transactions to access different rows of the same table is known as a