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Test: Database - UPSC MCQ


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10 Questions MCQ Test Famous Books for UPSC Exam (Summary & Tests) - Test: Database

Test: Database for UPSC 2024 is part of Famous Books for UPSC Exam (Summary & Tests) preparation. The Test: Database questions and answers have been prepared according to the UPSC exam syllabus.The Test: Database MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Database below.
Solutions of Test: Database questions in English are available as part of our Famous Books for UPSC Exam (Summary & Tests) for UPSC & Test: Database solutions in Hindi for Famous Books for UPSC Exam (Summary & Tests) course. Download more important topics, notes, lectures and mock test series for UPSC Exam by signing up for free. Attempt Test: Database | 10 questions in 10 minutes | Mock test for UPSC preparation | Free important questions MCQ to study Famous Books for UPSC Exam (Summary & Tests) for UPSC Exam | Download free PDF with solutions
Test: Database - Question 1
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In the context of normalization, what is a primary key?

Detailed Solution for Test: Database - Question 1
A primary key is a unique identifier for the records in a table. It ensures that each row within the table is uniquely identifiable. Primary keys are essential for establishing relationships between different tables in a relational database. They play a crucial role in maintaining data integrity and allowing efficient data retrieval operations.
Test: Database - Question 2
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Which of the following statements best describes the concept of normalization in a relational database?

Detailed Solution for Test: Database - Question 2
Normalization is a systematic approach to organizing and structuring a relational database to eliminate data redundancy and anomalies such as insertion, update, and deletion anomalies. It involves breaking down tables into smaller, related tables to ensure data integrity and consistency. By doing so, we can avoid the issues that arise when data is duplicated across tables, leading to inconsistencies and inefficiencies in data management.
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Test: Database - Question 3
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Which level of abstraction describes how a record is physically stored in the database?

Detailed Solution for Test: Database - Question 3
The physical level of abstraction describes how a record is physically stored on the storage devices of the database system. It deals with aspects such as storage structure, file organization, and data storage formats.
Test: Database - Question 4
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Which normal form requires that a table is in Second Normal Form (2NF) and that all non-key attributes are fully functionally dependent on the primary key?
Detailed Solution for Test: Database - Question 4
Third Normal Form (3NF) requires that a table meets the criteria of Second Normal Form (2NF) and additionally ensures that all non-key attributes are fully functionally dependent on the primary key. This normalization process eliminates transitive dependencies and helps maintain data consistency.
Test: Database - Question 5
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In a relational database, what is the purpose of a foreign key?
Detailed Solution for Test: Database - Question 5
A foreign key is a column or set of columns in a table that references the primary key of another table. It establishes a relationship between tables and enables the creation of meaningful associations among different pieces of data. This ensures data integrity and allows for enforcing referential integrity constraints.
Test: Database - Question 6
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What is the primary purpose of a database management system (DBMS)?
Detailed Solution for Test: Database - Question 6
A database management system (DBMS) is software designed to define, manipulate, retrieve, and manage data in a structured and organized manner. It provides mechanisms for data validation, data storage, data retrieval, and data manipulation. DBMS also enforces data integrity and security, making it an essential tool for effective data management.
Test: Database - Question 7
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What is the primary goal of normalizing a database?
Detailed Solution for Test: Database - Question 7
The primary goal of normalizing a database is to eliminate data anomalies, including insertion, update, and deletion anomalies. By organizing data into well-structured tables and removing redundancies, normalization ensures data integrity, consistency, and accuracy within the database.
Test: Database - Question 8
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Which type of key is used to establish relationships between tables in a relational database?
Detailed Solution for Test: Database - Question 8
A foreign key is used to establish relationships between tables in a relational database. It references the primary key of another table and helps maintain data consistency and integrity by enforcing referential integrity constraints.
Test: Database - Question 9
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Which normal form deals with eliminating transitive dependencies between non-key attributes?
Detailed Solution for Test: Database - Question 9
Boyce-Codd Normal Form (BCNF) deals with eliminating transitive dependencies between non-key attributes by ensuring that every determinant (a column that determines the values of other columns) is a candidate key. This helps to further reduce data redundancy and anomalies.
Test: Database - Question 10
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What is the purpose of creating views in a database?
Detailed Solution for Test: Database - Question 10
Views in a database provide a way to present a customized and simplified representation of data from multiple tables. They allow users to access specific subsets of data, hide complexity, and provide an additional layer of security by controlling access to sensitive information.
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Important Questions for Database

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