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Solved MCQ on Database Management System (DBMS) Set – 2

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Solved MCQ on Database Management System
This set of Solved MCQ on Database Management System (DBMS) includes objective questions on database Normalization, Data Definition Language (DDL), Data Manipulation Language (DML) and Data Control Language (DCL).

1. The candidate key is that you choose to identify each row uniquely is called ……………..
A) Alternate Key
B) Primary Key
C) Foreign Key
D) None of the above

2. …………….. is used to determine whether a table contains duplicate rows.
A) Unique predicate
B) Like Predicate
C) Null predicate
D) In predicate

3. To eliminate duplicate rows ……………… is used
A) NODUPLICATE
B) ELIMINATE
C) DISTINCT
D) None of these

4. State true or false
i) A candidate key is a minimal super key.
ii) A candidate key can also refer to a surrogate key.
A) i-true, ii-false
B) i-false, ii-true
C) i-true, ii-true
D) i-false, ii-false

5. DCL stands for
A) Data Control Language
B) Data Console Language
C) Data Console Level
D) Data Control Level

6. …………………… is the process of organizing data into related tables.
A) Normalization
B) Generalization
C) Specialization
D) None of the above

7. A ………………. does not have a distinguishing attribute if its own and most are dependent entities, which are part of some another entity.
A) Weak entity
B) Strong entity
C) Non-attributes entity
D) Dependent entity

8. …………….. is the complex search criteria in the where clause.
A) Substring
B) Drop Table
C) Predict
D) Predicate

9. ………………… is the preferred method for enforcing data integrity
A) Constraints
B) Stored Procedure
C) Triggers
D) Cursors

10. The number of tuples in a relation is called its …………. While the number of attributes in a relation is called it’s ………………..
A) Degree, Cardinality
B) Cardinality, Degree
C) Rows, Columns
D) Columns, Rows

11) The language that requires a user to specify the data to be retrieved without specifying exactly how to get it is
A. Procedural DML
B. Non-Procedural DML
C. Procedural DDL
D. Non-Procedural DDL

12) Which two files are used during the operation of the DBMS?
A. Query languages and utilities
B. DML and query language
C. Data dictionary and transaction log
D. Data dictionary and query language

13) The database schema is written in
A. HLL
B. DML
C. DDL
D. DCL

14) The way a particular application views the data from the database that the application uses is a
A. module
B. relational model
C. schema
D. subschema

15) The relational model feature is that there
A. is no need for primary key data
B. is much more data independence than some other database models
C. are explicit relationships among records.
D. are tables with many dimensions

16) Which one of the following statements is false?
A. The data dictionary is normally maintained by the database administrator
B. Data elements in the database can be modified by changing the data dictionary.
C. The data dictionary contains the name and description of each data element.
D. A data dictionary is a tool used exclusively by the database administrator.

17) Which of the following are the properties of entities?
A. Groups
B. Table
C. Attributes
D. Switchboards

18) Which database level is closest to the users?
A. External
B. Internal
C. Physical
D. Conceptual

19) Which are the two ways in which entities can participate in a relationship?
A. Passive and active
B. Total and partial
C. Simple and Complex
D. All of the above

20) …….. data type can store unstructured data
A. RAW
B. CHAR
C. NUMERIC
D. VARCHAR

We have created a quiz including solved MCQ on database management system. Please take this quiz to test your knowledge on DBMS fundamentals.

Quiz for Fundamentals of DBMS

 

1. What are the different events in Triggers?
2. The database schema is written in which of the following languages?
3. Which of the following is a utility to capture a continuous record of server activity and provide auditing capability?
4. Data independence means
5. What is the full form of DDL in Database Management System?
6. What is a full form of SQL?
7. In a relational model, relations are also called
8. What operator tests the column for the absence of data?
9. What is a logical schema?
10. Which of the following are the ways in which entities can participate in a relationship?
11. Which of the following is an outstanding functionality of SQL that supports automatic selection of the target data?
12. What is the number of tuples in a relation?
13. Which key is a minimal superkey that can also refer to a surrogate key?
14. Which of the following clauses is used to pass on granted privileges to other users?
15. Which of the following databases has only a strict parent-child relationship?
16. Which of the following is a preferred method for enforcing data integrity?
17. Which of the following is used to define the overall design of the database?
18. In a snapshot, which clause tells Oracle how long to wait between refreshes?
19. What represents the number of entities to which another entity can be associated?
20. Which keyword is used to find the number of values in a column?
21. What defines the structure of a relation that consists of a fixed set of attribute-domain pairs?
22. Which of the following is not a binary operator in relational algebra?
23. Which candidate key allows you to uniquely identify each row?
24. Which database is used as a template for all databases created?
25. Which contains information about a file needed by system programs for accessing file records?
26. DBMS helps to achieve
27. Which of the following keys is used to eliminate duplicate rows?
28. What is an advantage of the database management approach?
29. If a table has more than one set of attributes that could be chosen as the key, it is called
30. Grant and revoke are which of the following statements?
31. Which normal form is considered adequate for relational database design?
32. Which of the following provides an option for entering SQL queries as execution time, rather than at the development stage?
33. Which of the following components is NOT included in the database environment?
34. Which database level is closest to the users?
35. Which of the following is/are the DDL statements?
36. In an ER model, which is described in the database by storing its data.
37. What is the way a particular application views the data from the database that the application uses?
38. What is the view of total database content?
39. Which of the following is the preferred method for enforcing data integrity?
40. A top-to-bottom relationship among the items in a database is established by a
41. Which of the following is a condition specified on a database schema and restricts the data that can be stored in an instance of the database?
42. A table can have only one
43. Which of the following commands can be used to modify a column in a table?
44. What is the full form of HSAM?
45. Which of the following are used during the operation of the DBMS?
46. Which table store information about the database or about the system?
47. DFD stands for
48. Which is a proper subset designed to support views belonging to different classes of users in order to hide or protect information?
49. Which of the following operators is basically a join followed by a project on the attributes of the first relation?
50. In SQL, the CREATE TABLESPACE is used
51. Which clause is an additional filter that is applied to the result?
52. Which of the following files are used during the operation of the DBMS?
53. Which of the following is the complex search criteria in the where clause?
54. What is a set of columns that identifies every row in a table?
55. In SQL, which command is used to issue multiple CREATE TABLE, CREATE VIEW, and GRANT statements in a single transaction?
56. What language requires a user to specify the data to be retrieved without specifying exactly how to get it?
57. Which one of the following statements is false?
58. What is a special type of integrity constraint that relates two relations & maintains consistency across the relations?
59. Which of the following is a way a particular application views the data from the database that the application uses?
60. Which statement is executed automatically by the system?
61. Which of the following is not a characteristic of a relational database model?
62. Which command is used for entering the specific database?
63. What is a set of possible data values?
64. Which of the following contains information that defines valid values that are stored in a column or data type?
65. Which of the following is TRUE for the system variable "date"?
66. Which data type can store unstructured data?
67. What is the feature of the relational model?
68. Which of the following databases contains data assisting day-to-day activities of the organization?
69. In a relational schema, each tuple is divided into fields called
70. The key to represent the relationship between tables is called
71. Who proposed the process of normalization in DBMS at first?
72. Data items grouped together for storage purposes is called a
73. Which of the following is used to determine whether a table contains duplicate rows?
74. Which of the following clauses specifies a search condition for a group or an aggregate?
75. Which of the following enables users to create and maintain a database?
76. What will be created if a primary key is combined with a foreign key?
77. Which of the following defines rules regarding the values allowed in columns and is the standard mechanism for enforcing database integrity?
78. Which of the following has to be dealt with by the integrity subsystem is to ensure that only valid values can be assigned to each data item?
79. Which of the following are the properties of entities?
80. Which of the following entity does not have a distinguishing attribute if its own and most are dependent entities?
81. Which character function can be used to return a specified portion of a character string?
82. Which of the following SQL commands can be used to modify existing data in a database table?
83. DCL stands for
84. A relational database developer refers to a record as
85. Which of the following is not a logical database structure?
86. What is the process of organizing data into related tables?
87. In the relational modes, cardinality is also called
88. Which of the following is critical in formulating database design?
89. What is the collection of information stored in a database at a particular moment?
90. Which command can be used to change a column value in a table?

 

Answers:

1. B. Primary Key
2. A. Unique predicate
3. C. DISTINCT
4. C. i-true, ii-true
5. A. Data Control Language
6. A. Normalization
7. A. Weak entity
8. D. Predicate
9. A. Constraints
10. B. Cardinality, Degree
11. B. Non-Procedural DML
12.C. Data dictionary and transaction log
13. C. DDL
14. D. subschema
15. B. is much more data independence than some other database models
16. B. Data elements in the database can be modified by changing the data dictionary.
17. C. Attributes
18. A. External
19. B. Total and partial
20. A. RAW

Read Next: Solved MCQ on Database Management System (DBMS) Set – 3

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3 Comments

  1. tushar garg Reply

    Sir nielit exam se related questions bhi please upload kar dijiye

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