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Solved MCQ on Database Management System (DBMS) Set 1

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Solved MCQ on Database Management System (DBMS)
Here are the collections of solved MCQ on Database Management System (DBMS) including questions on the definition of DBMS, Data Flow Diagram (DFD) along with about SQL functions and commands.

1. DBMS is a collection of ………….. that enables users to create and maintain a database.
A) Keys
B) Translators
C) Program
D) Language Activity

2. In a relational schema, each tuple is divided into fields called
A) Relations
B) Domains
C) Queries
D) All of the above

3. In an ER model, ……………. is described in the database by storing its data.
A) Entity
B) Attribute
C) Relationship
D) Notation

4. DFD stands for
A) Data Flow Document
B) Data File Diagram
C) Data Flow Diagram
D) Non of the above

5. A top-to-bottom relationship among the items in a database is established by a
A) Hierarchical schema
B) Network schema
C) Relational Schema
D) All of the above

6. ……………… table store information about the database or about the system.
A) SQL
B) Nested
C) System
D) None of these

7. …………..defines the structure of a relation that consists of a fixed set of attribute-domain pairs.
A) Instance
B) Schema
C) Program
D) Super Key

8. ……………… clause is an additional filter that is applied to the result.
A) Select
B) Group-by
C) Having
D) Order by

9. A logical schema
A) is the entire database
B) is a standard way of organizing information into accessible parts.
C) Describes how data is actually stored on disk.
D) All of the above

10. ………………… is a full form of SQL.
A) Standard query language
B) Sequential query language
C) Structured query language
D) Server-side query language

11) A relational database developer refers to a record as
A. a criteria
B. a relation
C. a tuple
D. an attribute

12) ………. keyword is used to find the number of values in a column.
A. TOTAL
B. COUNT
C. ADD
D. SUM

13) An advantage of the database management approach is
A. data is dependent on programs
B. data redundancy increases
C. data is integrated and can be accessed by multiple programs
D. none of the above

14) The collection of information stored in a database at a particular moment is called as ……
A. schema
B. instance of the database
C. data domain
D. independence

15) Data independence means
A. data is defined separately and not included in programs.
B. programs are not dependent on the physical attributes of data
C. programs are not dependent on the logical attributes of data
D. both B and C

16) A ……… is used to define the overall design of the database
A. schema
B. application program
C. data definition language
D. code

17) Key to represent the relationship between tables is called
A. primary key
B. secondary key
C. foreign key
D. none of the above

18) Grant and revoke are ……. statements.
A. DDL
B. TCL
C. DCL
D. DML

19) DBMS helps achieve
A. Data independence
B. Centralized control of data
C. Neither A nor B
D. Both A and B

20) ………. command can be used to modify a column in a table
A. alter
B. update
C. set
D. create

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

Quiz for Fundamentals of DBMS

 

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

 

Answers:

1. C) Program
2. B) Domains
3. A) Entity
4. C) Data Flow Diagram
5. A) Hierarchical schema
6. C) System
7. B) Schema
8. C) Having
9. B) is a standard .. accessible part.
10. C) Structured query language
11) C. a tuple
12) B. COUNT
13) C. data is integrated and can be accessed by multiple programs
14) B. instance of the database
15) D. both B and C
16) A. schema
17) C. foreign key
18) C. DCL
19) D. Both A and B
20) A. alter

Read Next: Solved MCQ on Database Management System (DBMS) Set-2

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2 Comments

  1. jaswinder Reply

    sir , the answer to the Q..no. 17 is Primary key in most other site, explain

    • shuseel Post Author Reply

      We can set the primary key even there is no relationship created between the tables in the database but the foreign key is the same property of another table that is set as primary key and it will be presented on the table only if the relationship is created between the tables.

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