Quiz : How Well Do You Know About Relational Database Management System?

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Samy Boulos, MSc (Computer Science) |
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Samy Boulos is an experienced Technology Consultant with a diverse 25-year career encompassing software development, data migration, integration, technical support, and cloud computing. He leverages his technical expertise and strategic mindset to solve complex IT challenges, delivering efficient and innovative solutions to clients.
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1. Majority of relational database system employ which language

Explanation

Relational database systems primarily employ SQL (Structured Query Language). SQL is a standard programming language used for managing and manipulating relational databases. It allows users to create, modify, and retrieve data from databases, as well as perform various operations such as querying, updating, and deleting data. While C# and Java are popular programming languages, they are not specifically designed for relational database management like SQL. Therefore, the correct answer is SQL.

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About This Quiz
Quiz : How Well Do You Know About Relational Database Management System? - Quiz

Are you aware of relational databases? By taking our fun quiz, can you tell us just how well you know about relational databases? Our quiz is designed to help you understand how databases holding the same information are structured and maintained. Dive into questions that cover a wide... see morerange of topics, including database design, SQL, normalization processes, transaction management, and data integrity. You will also face challenges on advanced topics such as query optimization, stored procedures, and the roles of different database schemas.
Each question is crafted to assess your ability to apply these principles in practical scenarios, enhancing both your theoretical knowledge and your practical skills. By taking this quiz, you’ll gain insights into your proficiency with RDBMS and identify areas where further learning is needed.
Prepare to challenge your understanding of relational databases and enhance your skills with our engaging RDBMS Quiz! Do you think you have what it takes to tackle it based on what you have learned? Then press the start button and see how well you will do in this quiz. All the best! see less

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2. What is the purpose of an indexed field in a database?

Explanation

The purpose of an indexed field in a database is to speed up queries. By creating an index on a specific field, the database system can organize and sort the data in a way that allows for faster retrieval of specific information. This is especially useful when dealing with large amounts of data, as it helps to optimize the performance of queries and improve the overall efficiency of the database system.

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3. The frequency of a relationship between entities may be described by

Explanation

Cardinality refers to the number of instances of one entity that can be associated with another entity in a relationship. It describes the frequency or occurrence of the relationship between entities. For example, in a one-to-one cardinality, each instance of one entity is associated with only one instance of another entity. In a one-to-many cardinality, each instance of one entity can be associated with multiple instances of another entity. Cardinality helps in understanding the nature and constraints of the relationship between entities in a database.

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4. The requirement that each entity much have a unique primary key where the value of that primary key is not null, is known as the

Explanation

The requirement that each entity must have a unique primary key where the value of that primary key is not null is known as the Entity Integrity Rule. This rule ensures that each entity in a database has a unique identifier that is not null, which helps maintain data integrity and allows for efficient data retrieval and manipulation.

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5. Which of the following is TRUE about referential integrity rule?

Explanation

The referential integrity rule states that for each foreign key in a relational database, there must be a corresponding primary key. This means that the value in the foreign key column of a table must match a value in the primary key column of another table. This ensures that there is a valid relationship between the two tables and prevents orphaned records. Without a corresponding primary key, the foreign key would be meaningless and the relationship between the tables would be compromised.

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6. A database contains the fields Pupil_no and Pupil_name. If we are given the Pupil_no then we will know Pupil_name.  This means that:

Explanation

The given statement implies that if we have the Pupil_no, we can determine the corresponding Pupil_name. This indicates that the Pupil_name is functionally dependent on the Pupil_ID, as the Pupil_ID (or Pupil_no) determines the value of Pupil_name. Therefore, the correct answer is that Pupil_name is functionally dependent on Pupil_ID.

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7. Which of the following makes it possible for entities to share a relationship?

Explanation

This is a popular wrong answer. Relationships are not just formed by links between foreign keys.

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8. Which of the following is TRUE about relational database design?

Explanation

In relational database design, it is true that no row should be duplicated. This is because each row in a table represents a unique entity or instance, and duplicating rows would result in redundancy and data inconsistency. To ensure data integrity and efficiency, it is important to maintain a single instance of each row in the table. This can be achieved by using primary keys to uniquely identify each row and enforcing constraints to prevent duplicate entries.

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9. Consider the following entity:

CAR_RENTAL(Car_Reg, Make, Model, Driver_Name, Date_Hired, Date_Returned)

Which of the following would be included in a repeating group?

Explanation

In the given entity, CAR_RENTAL, the attribute Driver_Name would be included in a repeating group. A repeating group occurs when multiple values of an attribute are allowed for a single occurrence of an entity. In this case, it is possible for a car to be rented by multiple drivers, hence the attribute Driver_Name would have multiple values, making it a repeating group.

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10. If there are multiple occurrences of attributes for a single value of a primary key, this is known as a ______________ group.

Explanation

If there are multiple occurrences of attributes for a single value of a primary key, this is known as a repeating group. In a database, a primary key is a unique identifier for each record in a table. However, in some cases, there may be multiple instances of attributes associated with a single primary key value. This is referred to as a repeating group, as it involves repeating the same set of attributes for a specific primary key value.

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Samy Boulos |MSc (Computer Science) |
Data Engineer
Samy Boulos is an experienced Technology Consultant with a diverse 25-year career encompassing software development, data migration, integration, technical support, and cloud computing. He leverages his technical expertise and strategic mindset to solve complex IT challenges, delivering efficient and innovative solutions to clients.

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  • Sep 30, 2009
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Majority of relational database system employ which language
What is the purpose of an indexed field in a database?
The frequency of a relationship between entities may be described by
The requirement that each entity much have a unique primary key where...
Which of the following is TRUE about referential integrity rule?
A database contains the fields Pupil_no and Pupil_name. If we are...
Which of the following makes it possible for entities to share a...
Which of the following is TRUE about relational database design?
Consider the following entity:CAR_RENTAL(Car_Reg, Make, Model,...
If there are multiple occurrences of attributes for a single value of...
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