Database Management System Multiple choice questions

1) In the context of data warehousing, data map or ‘data about data’ is known as …………….
a) tuple
b) attribute
c) metadata
d) teradata

2) Which of the following normal form deals with the anomaly of multivalue dependency?
a) 1NF
b) 2NF
c) 4NF
d) 5NF

3) Which of the following normal form deals with the repeating group anomaly?
a) 1NF
b) 2NF
c) 4NF
d) 5NF

4) …………… is a database language used to define data structures in SQL?
a) Sybase
b) Oracle
c) DDL
d) MySQL

5) The ………………… is a database file that contains metadata.
a) data index
b) data repository
c) data dictionary
d) none

6)Which of the following is not the state of a transaction in the database?
a) Active
b) Committed
c) Terminated
d) Nullified

7) The …………… file saves the recovery scenario in Quick Test Professional (QTP) environment
a) QRS
b) JPEG
c) DOC
d) TSR

8) Which of the following is not a command is SQL?
a) WHERE
b) ORDER BY
c) REMOVE
d) SELECT

9) How should we traverse an oracle database to retrieve a row in the quickest possible time?
a) Full table scan
b) Unique index
c) Primary key
d) Table access by row id

10) Which of the following is a concurrency control protocol?
a) Locked-based protocol
b) two-phase locking protocol
c) Timestamp ordering protocol
d) all

11) Which of the following normal forms deals with the anomaly of partial functional dependency on the composite key?
a) 1NF
b) 2NF
c) 4NF
d) 5NF

12) ………………… represents the structure of the database in a formal language acceptable by the DBMS.
a) Database schema
b) ER diagram
c) Database table
d) None

13) Which of the following statements are used to create indexes in the database?
a) CREATE INDEX
b) BUILD INDEX
c) WRITE INDEX
d) None’

14)Which of the following is a database recovery technique?
a) Check-pointing
b) Transaction rollback
c) Shadow paging
d) All

15)Which of the following is a foreing key constraint?
a)Referential integrity
b) Domain integrity
c) Entity integrity
d) All

16) Which of the following trains are important to select a primary key?
a) Unique
b) Not Null
c) Fully functional dependency
d) Indexed
e) All

17) What are various types of DBMS?
a) ORBDMS
b) Client server DBMS
c) Distributed DBMS
d) OODBMS
e) All

18) Which of the following are the types of integrity constraints enforced by RDBMS?
a) Entity integrity
b) Domain integrity
c) Referential integrity
d) All

19) The data model which describes how the data is actually stored is :
a) internal model
b) external model
c) logical model
d) none of these

20) Data about data is normally termed as :
a) directory
b) data bank
c) meta data
d) none of the above

21. In an object-oriented model, one object can access data of another object by passing:
a. Instance variable
b. Message
c. Variable
d. None of these

22. A view of database that appears to an application program is known as:
a. Schema
b. Subschema
c. virtual table
d. none of the above

23. An abstraction concept for building composite object from their component object is called:
a. Specialization
b. Normalization
c. Generalization
d. Aggregation

24. A set of objects that share a common structure and
a common behavior is called:
a. Object
b. Class
c. Entity
d. None of these

25. Every weak entity set can be converted into a strong entity set by:
a. using generalization
b. adding appropriate attributes
c. using aggregation
d. none of the above

26. The number of entities to which another entity can be associated via a relationship set is expressed as:
a. Entity
b. Cardinality
c. Schema
d. Attributes

27. Relations produced from an E-R model will always be in:
a. First normal form
b. Second normal form
c. Third normal form
d. Fourth normal form

28. In ER model the details of the entities are hidden from the user. This process is called:
a. Generalization
b. Specialization
c. Abstraction
d. none of these above

29. The file organization that provides very fast access to any arbitrary record of a file is:
a. Ordered file
b. Unordered file
c. Hashed file
d. B-tree

30. What is not true about a view?
a. It is a definition of a restricted portion of the database
b. It is a security mechanism
c. It is always updatable like any other table
d. All are true

31. In a relational database a referential integrity constraint can be specified with the help of
a. primary key
b. foreign key
c. secondary key
d. none of the above

32. A super key is a set of one or more attributes that, taken collectively, allow us
a. to identify uniquely an entity in the entityset
b. to make the key most powerful for fasterretrieval
c. to increase effectiveness of database access
d. none of the above

33. 4NF is designed to cope with:
a. Transitive dependency
b. Join dependency
c. Multi valued dependency
d. None of these

34. Every Boyee-Codd normal form is in
a. First normal form
b. Second normal form
c. Third normal form
d. All of the above

35. Which command is used to remove all rows from a table?
a. Delete
b. Remove
c. Truncate
d. Both [A] and [B]

36. Which of the following is an aggregate function in SQL?
a. Union
b. Like
c. Group By
d. Max

37. Which command is used to add a column to an existing table?
a. Create
b. Update
c.Alter
d. None of these

38. A deadlock exists in the system if and only if the wait for graph:
a. has a cycle in it
b. has a path from first node to last node
c. is a tree
d. none of the above

39. Rollback of transactions is normally used to:
a. recover from transaction failure
b. update the transaction
c. retrieve old records
d. repeat a transaction

40. Prevention of access to the database by unauthorized users is referred to as:
a. Integrity
b. Productivity
c. Security
d. Reliability