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Database Testing MCQs and Answers With Explanation – Database testing is a crucial aspect of software testing that ensures the accuracy, completeness, and consistency of the data stored in a database. To ensure that a database is functioning correctly, it is necessary to test it thoroughly. And to know more information on Database Testing then this article about Database Testing MCQ Questions will surely help you.
Database Testing MCQs
This set of Top 35 Database MCQ Online Test covers various aspects of database testing, including schema, keys, normalization, and database objects such as triggers, views, and stored procedures. These Database Testing MCQ Questions & Answers also include questions about database security testing, such as SQL injection attacks. In this article, we’ll explore the correct answers to the Database Testing Objective Questions and also detailed explanations for each and every question. Check out this Database Testing Quiz and learn new things about Database Testing.
Database Testing MCQ Questions & Answers
| Name | Database Testing |
| Exam Type | MCQ (Multiple Choice Questions) |
| Category | Technical Quiz |
| Mode of Quiz | Online |
Top 35 Database Testing MCQs | Online Practice Quiz
1. Which of the following statements is true about database testing?
A) Database testing verifies the data integrity and consistency of data in the database.
B) Database testing checks the correctness of the user interface.
C) Database testing validates the functionality of the application.
D) Database testing verifies the performance of the application.
Answer: A) Database testing verifies the data integrity and consistency of data in the database.
Explanation: Database testing is a process of verifying and validating the data in the database to ensure that it is accurate, complete, and consistent. It checks the data integrity, data consistency, data validation, data retrieval, data manipulation, and data security.
2. What is a database schema?
A) A collection of tables in a database.
B) A collection of data in a database.
C) A set of rules and constraints that govern the structure and organization of data in a database.
D) A set of procedures and functions that are used to manipulate data in a database.
Answer: C) A set of rules and constraints that govern the structure and organization of data in a database.
Explanation: A database schema is a blueprint of the structure and organization of data in a database. It defines the relationships between the tables, the data types, and the constraints that govern the data in the database.
3. What is a primary key in a database?
A) A key that uniquely identifies a row in a table.
B) A key that is used to link two or more tables together.
C) A key that is used to encrypt data in a table.
D) A key that is used to validate data in a table.
Answer: A) A key that uniquely identifies a row in a table.
Explanation: A primary key is a unique identifier for each row in a table. It is used to ensure that each row in the table can be uniquely identified and accessed.
4. Which of the following statements is true about normalization in database design?
A) Normalization is the process of removing redundancy from the data in a database.
B) Normalization is the process of adding redundancy to the data in a database.
C) Normalization is the process of encrypting data in a database.
D) Normalization is the process of validating data in a database.
Answer: A) Normalization is the process of removing redundancy from the data in a database.
Explanation: Normalization is the process of organizing data in a database to minimize redundancy and improve data integrity. It involves breaking down large tables into smaller, more manageable tables and establishing relationships between them.
5. What is a foreign key in a database?
A) A key that is used to link two or more tables together.
B) A key that uniquely identifies a row in a table.
C) A key that is used to encrypt data in a table.
D) A key that is used to validate data in a table.
Answer: A) A key that is used to link two or more tables together.
Explanation: A foreign key is a field in one table that is used to link to the primary key of another table. It establishes a relationship between two tables and allows data to be retrieved from both tables.
6. Which of the following is not a type of database testing?
A) Functional testing.
B) Integration testing.
C) Performance testing.
D) Data entry testing.
Answer: D) Data entry testing.
Explanation: Data entry testing is not a type of database testing. It is a type of manual testing that involves verifying the accuracy and completeness of data entered into a system.
7. What is SQL injection?
A) A type of performance testing.
B) A type of integration testing.
C) A type of security testing.
D) A type of functional testing.
Answer: C) A type of security testing.
Explanation: SQL injection is a type of security testing that involves injecting malicious SQL statements into an application’s database. It can be used to access, modify, or delete sensitive data in the database, or to execute unauthorized commands.
8. What is a trigger in a database?
A) A type of SQL command.
B) A set of rules and constraints that govern the structure and organization of data in a database.
C) A set of procedures and functions that are used to manipulate data in a database.
D) A piece of code that is executed automatically in response to a certain event in the database.
Answer: D) A piece of code that is executed automatically in response to a certain event in the database.
Explanation: A trigger is a piece of code that is executed automatically in response to a certain event in the database, such as a data modification or a data insertion. It can be used to enforce business rules, validate data, or maintain audit trails.
9. What is a view in a database?
A) A virtual table that is derived from one or more tables in the database.
B) A set of rules and constraints that govern the structure and organization of data in a database.
C) A set of procedures and functions that are used to manipulate data in a database.
D) A type of index that is used to speed up data retrieval.
Answer: A) A virtual table that is derived from one or more tables in the database.
Explanation: A view is a virtual table that is derived from one or more tables in the database. It can be used to simplify complex queries, enforce security, or provide a customized view of the data to different users.
10. What is a stored procedure in a database?
A) A type of SQL command.
B) A set of rules and constraints that govern the structure and organization of data in a database.
C) A set of procedures and functions that are used to manipulate data in a database.
D) A piece of code that is executed automatically in response to a certain event in the database.
Answer: C) A set of procedures and functions that are used to manipulate data in a database.
Explanation: A stored procedure is a set of procedures and functions that are stored in the database and can be executed by a user or an application. It can be used to perform complex database operations, enforce business rules, or automate database tasks.
11. Which of the following statements is true about data validation testing?
A) Data validation testing verifies the data integrity and consistency of data in the database.
B) Data validation testing checks the correctness of the user interface.
C) Data validation testing validates the functionality of the application.
D) Data validation testing verifies the input and output of data in the application.
Answer: D) Data validation testing verifies the input and output of data in the application.
Explanation: Data validation testing is a process of verifying that the application is accepting the correct data and providing the correct output. It checks the input validation, output validation, and error handling of the application.
12. Which of the following is not a type of data integrity constraint?
A) Primary key constraint
B) Foreign key constraint
C) Unique key constraint
D) Performance key constraint
Answer: D) Performance key constraint.
Explanation: Performance key constraint is not a type of data integrity constraint. Primary key, foreign key, and unique key constraints are used to ensure data integrity and consistency in the database.
13. What is data mining in a database?
A) The process of analyzing large volumes of data to discover hidden patterns, trends, and relationships.
B) The process of removing redundancy from the data in a database.
C) The process of encrypting data in a database.
D) The process of validating data in a database.
Answer: A) The process of analyzing large volumes of data to discover hidden patterns, trends, and relationships.
Explanation: Data mining is the process of analyzing large volumes of data to discover hidden patterns, trends, and relationships. It is used to identify useful information from a large amount of data and make decisions based on that information.
14. What is a data warehouse?
A) A large repository of data that is used for reporting and data analysis.
B) A collection of data that is stored on a separate server for backup purposes.
C) A type of database that is used to store multimedia data, such as images and videos.
D) A database that is used to store historical data.
Answer: A) A large repository of data that is used for reporting and data analysis.
Explanation: A data warehouse is a large repository of data that is used for reporting and data analysis. It is designed to support business intelligence activities, such as data mining, decision support, and trend analysis.
15. Which of the following is not a type of database backup?
A) Full backup.
B) Differential backup.
C) Incremental backup.
D) Dynamic backup.
Answer: D) Dynamic backup.
Explanation: Dynamic backup is not a type of database backup. Full backup, differential backup, and incremental backup are common types of database backup.
16. What is a database transaction?
A) A unit of work that is performed on a database.
B) A set of rules and constraints that govern the structure and organization of data in a database.
C) A set of procedures and functions that are used to manipulate data in a database.
D) A type of SQL command.
Answer: A) A unit of work that is performed on a database.
Explanation: A database transaction is a unit of work that is performed on a database. It is a sequence of one or more SQL statements that are executed as a single logical unit of work.
17. What is normalization in a database?
A) The process of removing redundancy from the data in a database.
B) The process of encrypting data in a database.
C) The process of converting unstructured data into structured data.
D) The process of organizing data into tables and eliminating data redundancy.
Answer: D) The process of organizing data into tables and eliminating data redundancy.
Explanation: Normalization is the process of organizing data into tables and eliminating data redundancy. It is used to reduce data redundancy and improve data integrity.
18. Which of the following is not a type of database constraint?
A) NOT NULL constraint.
B) CHECK constraint.
C) DEFAULT constraint.
D) READ constraint.
Answer: D) READ constraint.
Explanation: READ constraint is not a type of database constraint. NOT NULL constraint, CHECK constraint, and DEFAULT constraint are common types of database constraint.
19. Which of the following is not a type of database index?
A) Clustered index.
B) Non-clustered index.
C) Bitmap index.
D) Dynamic index.
Answer: D) Dynamic index.
Explanation: Dynamic index is not a type of database index. Clustered index, non-clustered index, and bitmap index are common types of database index.
20. Which of the following is not a type of database replication?
A) Snapshot replication.
B) Transactional replication.
C) Merge replication.
D) Index replication.
Answer: D) Index replication.
Explanation: Index replication is not a type of database replication. Snapshot replication, transactional replication, and merge replication are common types of database replication.
21. Which of the following is not a type of database trigger?
A) BEFORE trigger.
B) AFTER trigger.
C) INSTEAD OF trigger.
D) DURING trigger.
Answer: D) DURING trigger.
Explanation: DURING trigger is not a type of database trigger. BEFORE trigger, AFTER trigger, and INSTEAD OF trigger are common types of database trigger.
22. Which of the following is not a type of SQL statement?
A) SELECT statement.
B) UPDATE statement.
C) DELETE statement.
D) CLEAR statement.
Answer: D) CLEAR statement.
Explanation: CLEAR statement is not a type of SQL statement. SELECT statement, UPDATE statement, and DELETE statement are common types of SQL statement.
23. What is a database view?
A) A virtual table that is based on the result of an SQL statement.
B) A physical table that is used to store data in a database.
C) A type of backup that is used to restore a database.
D) A type of database index.
Answer: A) A virtual table that is based on the result of an SQL statement.
Explanation: A database view is a virtual table that is based on the result of an SQL statement. It is used to simplify complex queries and provide a customized view of the data to different users.
24. Which of the following is not a type of database join?
A) INNER JOIN.
B) OUTER JOIN.
C) CROSS JOIN.
D) FORWARD JOIN.
Answer: D) FORWARD JOIN.
Explanation: FORWARD JOIN is not a type of database join. INNER JOIN, OUTER JOIN, and CROSS JOIN are common types of database join.
25. Which of the following is not a type of database schema?
A) User schema.
B) System schema.
C) Application schema.
D) Metadata schema.
Answer: C) Application schema.
Explanation: Application schema is not a type of database schema. User schema, system schema, and metadata schema are common types of database schema.
26. What is a database index?
A) A data structure that is used to improve the speed of data retrieval operations.
B) A type of backup that is used to restore a database to a previous state.
C) A type of database constraint that is used to ensure data integrity.
D) A type of database trigger that is used to execute SQL statements automatically in response to database events.
Answer: A) A data structure that is used to improve the speed of data retrieval operations.
Explanation: A database index is a data structure that is used to improve the speed of data retrieval operations. It is used to speed up queries by providing a fast access path to the data.
27. Which of the following is not a type of database normalization?
A) First normal form (1NF).
B) Second normal form (2NF).
C) Third normal form (3NF).
D) Fourth normal form (4NF).
Answer: D) Fourth normal form (4NF).
Explanation: Fourth normal form (4NF) is not a type of database normalization. First normal form (1NF), second normal form (2NF), and third normal form (3NF) are common types of database normalization.
28. What is a database trigger?
A) A set of SQL statements that are executed automatically in response to database events.
B) A type of database backup that is used to restore a database to a previous state.
C) A type of database constraint that is used to ensure data integrity.
D) A type of database index that is used to improve the speed of data retrieval operations.
Answer: A) A set of SQL statements that are executed automatically in response to database events.
Explanation: A database trigger is a set of SQL statements that are executed automatically in response to database events. It is used to automate database tasks and enforce business rules.
29. What is a database constraint?
A) A rule that is applied to a database to ensure data integrity.
B) A type of database backup that is used to restore a database to a previous state.
C) A type of database trigger that is used to execute SQL statements automatically in response to database events.
D) A type of database index that is used to improve the speed of data retrieval operations.
Answer: A) A rule that is applied to a database to ensure data integrity.
Explanation: A database constraint is a rule that is applied to a database to ensure data integrity. It is used to enforce business rules and prevent data inconsistencies.
30. What is a database primary key?
A) A column or set of columns that uniquely identifies each row in a table.
B) A type of database backup that is used to restore a database to a previous state.
C) A type of database constraint that is used to ensure data integrity.
D) A type of database index that is used to improve the speed of data retrieval operations.
Answer: A) A column or set of columns that uniquely identifies each row in a table.
Explanation: A database primary key is a column or set of columns that uniquely identifies each row in a table. It is used to enforce data integrity and facilitate data retrieval.
31. What is a database foreign key?
A) A column or set of columns that refers to the primary key of another table.
B) A type of database backup that is used to restore a database to a previous state.
C) A type of database trigger that is used to execute SQL statements automatically in response to database events.
D) A type of database index that is used to improve the speed of data retrieval operations.
Answer: A) A column or set of columns that refers to the primary key of another table.
Explanation: A database foreign key is a column or set of columns that refers to the primary key of another table. It is used to establish relationships between tables and enforce referential integrity.
32. Which of the following is not a type of database recovery?
A) Rollback recovery.
B) Point-in-time recovery.
C) Media recovery.
D) Query recovery.
Answer: D) Query recovery.
Explanation: Query recovery is not a type of database recovery. Rollback recovery, point-in-time recovery, and media recovery are common types of database recovery.
33. What is a database deadlock?
A) A situation where two or more transactions are waiting for each other to release locks.
B) A type of database backup that is used to restore a database to a previous state.
C) A type of database trigger that is used to execute SQL statements automatically in response to database events.
D) A type of database constraint
Answer: A) A situation where two or more transactions are waiting for each other to release locks.
Explanation: A database deadlock is a situation where two or more transactions are waiting for each other to release locks, preventing any of the transactions from proceeding. Deadlocks can cause database performance issues and require manual intervention to resolve.
34. Which of the following is not a common type of database relationship?
A) One-to-one relationship.
B) One-to-many relationship.
C) Many-to-many relationship.
D) Many-to-one relationship.
Answer: D) Many-to-one relationship.
Explanation: Many-to-one relationship is not a common type of database relationship. One-to-one relationship, one-to-many relationship, and many-to-many relationship are more commonly used in database design.
35. Which of the following is not a common type of database normalization?
A) First normal form (1NF).
B) Second normal form (2NF).
C) Third normal form (3NF).
D) Fourth normal form (4NF).
Answer: D) Fourth normal form (4NF).
Explanation: Fourth normal form (4NF) is not a common type of database normalization. The first normal form (1NF), second normal form (2NF), and third normal form (3NF) are more commonly used in database design.
Database testing is a critical component of ensuring the accuracy, reliability, and performance of a database system. Through effective testing, potential errors and inconsistencies can be identified and resolved, ensuring the system meets the required specifications and user needs. The Database Testing MCQ Questions & Answers above have provided a useful overview of the key concepts and techniques involved in database testing, including various types of testing methods and tools. Kindly bookmark our Freshersnow portal regularly to get the latest updates on various technical quizzes that we have accommodated for you.