Database Management System Quiz
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Questions and Answers

What type of application is an airline reservation system?

  • Transaction processing system
  • Online gaming
  • Document database
  • Database application (correct)

    • What problem arises when storing data in multiple file formats?

  • Data redundancy and inconsistency (correct)
  • Security breach
  • Data isolation
  • Integrity problems

    • What is the primary function of Data Definition Language (DDL)?

  • To define the database schema (correct)
  • To ensure transaction atomicity
  • To manage concurrent access
  • To access and update data

    • What is a characteristic of the relational model?

    <p>Data stored in various tables</p> Signup and view all the answers

    What does the term 'instance' refer to in the context of databases?

    <p>The actual content of the database at a particular point in time</p> Signup and view all the answers

    What is the primary key in a database?

    <p>A field that uniquely identifies a row in a table</p> Signup and view all the answers

    Which type of DML requires specifying what data is needed without specifying how to get that data?

    <p>Declarative DML</p> Signup and view all the answers

    Which of the following is an example of a database application?

    <p>Banking transactions</p> Signup and view all the answers

    What is the primary function of a Database Administrator (DBA)?

    <p>Managing the database schema and storage structure</p> Signup and view all the answers

    In which era did SQL emerge as an industrial standard?

    <p>1980s</p> Signup and view all the answers

    What is a characteristic of NoSQL systems?

    <p>They are designed for big data storage</p> Signup and view all the answers

    What translates DML statements into low-level instructions?

    <p>DML compiler</p> Signup and view all the answers

    What is an example of a database application?

    <p>Manufacturing</p> Signup and view all the answers

    What is a collection of operations that performs a single logical function in a database application?

    <p>Transaction</p> Signup and view all the answers

    What problem can occur when data is stored in multiple file formats?

    <p>Both data redundancy and inconsistency</p> Signup and view all the answers

    What type of database is distributed across multiple physical locations?

    <p>Distributed databases</p> Signup and view all the answers

    What is the primary advantage of declarative DMLs over procedural DMLs?

    <p>They focus on what data is required rather than how to retrieve it</p> Signup and view all the answers

    What is the logical schema of a database?

    <p>The logical structure of the database</p> Signup and view all the answers

    How does the relational model store data?

    <p>In tables (relations)</p> Signup and view all the answers

    What is the purpose of a primary key in a database?

    <p>To uniquely identify each record in a table</p> Signup and view all the answers

    What can be said about SQL as a programming language?

    <p>It is a declarative language</p> Signup and view all the answers

    What is the primary goal of transaction management?

    <p>To ensure the database remains in a consistent state despite failures</p> Signup and view all the answers

    In a two-tier architecture, how does the client machine interact with the database?

    <p>Directly with the database</p> Signup and view all the answers

    What does the term 'instance' refer to in the context of a database?

    <p>The snapshot of the data stored in the database at a specific moment in time</p> Signup and view all the answers

    What can be said about naive users of a database system?

    <p>They are unsophisticated users who interact with the system using predefined application programs</p> Signup and view all the answers

    What is true about the relational model?

    <p>It stores data in tables (relations)</p> Signup and view all the answers

    What is physical data independence?

    <p>The ability to change the physical schema without affecting the logical schema</p> Signup and view all the answers

    What does a DDL compiler translate?

    <p>DDL statements into database schema</p> Signup and view all the answers

    In a three-tier architecture, what component handles business logic?

    <p>Application server</p> Signup and view all the answers

    What are parallel databases designed to improve?

    <p>Performance</p> Signup and view all the answers

    What is the responsibility of the storage manager?

    <p>Storage, retrieval, and updating of data</p> Signup and view all the answers

    What is the characteristic of parallel databases?

    <p>Using multiple processors and storage devices in a shared memory or shared disk configuration</p> Signup and view all the answers

    In which decade was SQL developed?

    <p>1970s</p> Signup and view all the answers

    What is the purpose of a database index?

    <p>To provide fast access to data items holding particular values</p> Signup and view all the answers

    What components make up the query processor?

    <p>DDL interpreter and query evaluation engine</p> Signup and view all the answers

    What is one of the key responsibilities of a database administrator?

    <p>To periodically back up the database</p> Signup and view all the answers

    When did object-oriented database systems become prominent?

    <p>1980s</p> Signup and view all the answers

    When did SQL become an industrial standard?

    <p>1980s</p> Signup and view all the answers

    Study Notes

    Database Applications

    • Online gaming is not an example of a database application.
    • Database applications include banking transactions, document databases, and airline reservations.

    Data Storage Issues

    • Storing data in multiple file formats can lead to data redundancy and inconsistency.
    • Data redundancy and inconsistency occur when data is stored in multiple formats.

    Data Definition Language (DDL)

    • The primary purpose of DDL is to define the database schema.
    • DDL is used to create the database schema.

    Relational Model

    • The relational model stores data in various tables.
    • Data is not stored in hierarchical structures or a single flat file in a relational model.

    Database Concepts

    • An instance refers to the actual content of the database at a particular point in time.
    • A primary key is a field that uniquely identifies a row in a table.

    Data Manipulation Language (DML)

    • Declarative DML specifies what data is needed without specifying how to get it.
    • DML compiler translates DML statements into low-level instructions.

    Database Architecture

    • Client-server architecture is a type of database architecture.
    • In a two-tier architecture, the client machine interacts directly with the database.

    Database Administration

    • The main function of a database administrator (DBA) is to manage the database schema and storage structure.
    • A DBA is responsible for periodically backing up the database.

    Database Era

    • The 1980s saw the emergence of SQL as an industrial standard.
    • SQL is a declarative language used for querying databases.

    NoSQL Systems

    • NoSQL systems are designed for big data storage.

    Transactions

    • A transaction is a collection of operations that performs a single logical function in a database application.
    • Transaction management ensures that the database remains in a consistent state despite failures.

    Database Components

    • The query processor includes components like the DDL interpreter and the query evaluation engine.
    • The storage manager is responsible for the storage, retrieval, and updating of data.

    Database Design

    • Physical data independence allows modifying the physical schema without changing the logical schema.
    • A database index provides fast access to data items holding particular values.

    Other

    • Naive users are unsophisticated users who interact with the system using predefined application programs.
    • Parallel databases involve many core shared memory or shared disk systems.
    • Object-oriented database systems became prominent in the 1980s and 1990s.

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    Description

    Test your knowledge of database management systems with these multiple-choice questions. Covers topics such as database applications and data storage issues.

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