Designing databases. (uppersixth. science computer science new)

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Test your knowledge on key relational database concepts with this fun quiz!

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Designing databases. (uppersixth. science computer science new)


Froggy Jumps Designing databases. (uppersixth. science computer science new)Version en ligne Test your knowledge on key relational database concepts with this fun quiz! par YAKILI LMS 1 What is a primary key in a relational database? a A unique identifier for each record in a table. b A method for data encryption. c A type of database query. 2 What does normalization achieve in a database? a Enhances database speed. b Increases data redundancy. c Reduces data redundancy and improves data integrity. 3 What is a foreign key? a A unique identifier for a table. b A type of database index. c A field that links to the primary key of another table. 4 What is the purpose of a relational schema? a Encrypts sensitive information. b Stores user data. c Defines the structure of a database including tables and relationships. 5 What does SQL stand for? a Structured Query Language. b Standard Query Logic. c Simple Query Language. 6 What is a table in a relational database? a A method of data storage. b A type of database query. c A collection of related data entries organized in rows and columns. 7 What is a relationship in a relational database? a A connection between two tables based on a common field. b A type of data encryption. c A method for data retrieval. 8 What is an index in a database? a A method for data encryption. b A type of backup. c A data structure that improves the speed of data retrieval. 9 What is a view in a relational database? a A virtual table based on the result of a query. b A method for data entry. c A physical storage location. 10 What is a transaction in a database context? a A type of data backup. b A method for data encryption. c A sequence of operations performed as a single logical unit. 11 What is an entity in a model? a A distinct object or concept represented in a database. b A type of database query. c A programming language. 12 What are fields in an entity model? a Methods for data manipulation. b User interface elements. c Attributes that define the properties of an entity. 13 How do you identify fields in an entity? a By reviewing user interface designs. b By analyzing the characteristics and data requirements of the entity. c By examining database queries. 14 What is the purpose of defining fields in a model? a To enhance visual design. b To increase processing speed. c To ensure data integrity and structure within the database. 15 Can an entity have multiple fields? a Only if it is a complex entity. b No, it can only have one field. c Yes, an entity can have multiple fields representing different attributes. 16 What is an example of a field in a 'Customer' entity? a User interface layout. b Database connection string. c CustomerID, Name, or Email. 17 What is the relationship between entities and fields? a Fields are unrelated to entities. b Entities are the fields themselves. c Fields are the attributes that describe entities. 18 Why is it important to identify fields correctly? a To reduce coding time. b To improve software aesthetics. c To accurately represent data and maintain database functionality. 19 What tool can help in identifying fields for an entity? a Web browsers. b Text editors. c Entity-Relationship Diagrams (ERDs). 20 What does a field's data type determine? a The field's visibility in the UI. b The entity's name. c The kind of data that can be stored in that field. 21 What is the purpose of selecting key fields for an entity? a To store additional data. b To simplify the database structure. c To uniquely identify each instance of the entity. 22 Which of the following is a key field? a Student Name b Student ID in a student entity. c Course Name 23 What type of data is typically used for key fields? a Images b Long text descriptions c Unique identifiers like numbers or codes. 24 Can a key field be a combination of multiple fields? a No, it must be a single field. b Only in non-relational databases. c Yes, it's called a composite key. 25 Which entity might have a key field of 'ISBN'? a Publisher entity b Book entity. c Author entity 26 What is a primary key? a A field that uniquely identifies a record in a table. b A field that stores images. c A field that can be duplicated. 27 Why is it important to avoid null values in key fields? a They are not allowed in databases. b They can lead to ambiguity in identifying records. c They take up too much space. 28 Which of the following is NOT a characteristic of key fields? a They can be changed frequently. b They cannot be null. c They must be unique. 29 What is a foreign key? a A field that links to the primary key of another table. b A key that is not used. c A key that duplicates data. 30 In a customer entity, which field could serve as a key field? a Customer Address b Customer ID. c Customer Phone Number 31 What is an entity in computer science? a A distinct object or concept in a database. b A type of programming language. c A software development method. 32 What does a relationship represent in a database? a An algorithm for sorting data. b A type of data structure. c The connection between two entities. 33 Which term describes the attributes of an entity? a Entity links. b Entity relationships. c Entity attributes. 34 What is a primary key? a A unique identifier for an entity in a database. b A type of database query. c A method for data encryption. 35 What is a foreign key used for? a To link two tables in a database. b To store large data files. c To create user interfaces. 36 What does normalization do in database design? a It enhances user experience. b It increases data security. c It reduces data redundancy. 37 Which diagram is commonly used to represent entity relationships? a Flowchart. b Class diagram. c Entity-Relationship Diagram (ERD). 38 What type of relationship allows multiple instances of one entity to relate to multiple instances of another? a Many-to-many relationship. b One-to-many relationship. c One-to-one relationship. 39 What is an example of a weak entity? a An independent entity. b An entity that cannot exist without a strong entity. c A redundant entity. 40 What does the term 'cardinality' refer to in relationships? a The number of instances of one entity related to another. b The type of data stored. c The speed of data retrieval. 41 What is the primary purpose of normalization in databases? a To reduce data redundancy. b To increase data redundancy. c To improve data security. 42 Which normal form eliminates duplicate columns from the same table? a Second Normal Form (2NF). b First Normal Form (1NF). c Third Normal Form (3NF). 43 What does 2NF require in addition to 1NF? a Elimination of transitive dependencies. b Elimination of all keys. c Elimination of partial dependencies. 44 Which normal form addresses transitive dependencies? a Boyce-Codd Normal Form (BCNF). b First Normal Form (1NF). c Third Normal Form (3NF). 45 What is a benefit of normalization? a Increased data duplication. b Improved data integrity. c Slower data retrieval. 46 Normalization can help with which of the following? a Maximizing data loss. b Minimizing update anomalies. c Increasing data complexity. 47 What is denormalization? a The process of removing all redundancy. b The process of introducing redundancy for performance. c The process of merging tables. 48 Which of the following is NOT a normal form? a Fourth Normal Form (4NF). b Second Normal Form (2NF). c First Normal Form (1NF). 49 What is the main goal of database normalization? a To create complex relationships. b To store data in multiple locations. c To organize data efficiently. 50 Normalization can lead to which of the following? a Increased data redundancy. b Simplified database design. c More complex queries.

Designing databases. (uppersixth. science computer science new)

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Designing databases. (uppersixth. science computer science new)Version en ligne

par YAKILI LMS

What is a primary key in a relational database?

What does normalization achieve in a database?

What is a foreign key?

What is the purpose of a relational schema?

What does SQL stand for?

What is a table in a relational database?

What is a relationship in a relational database?

What is an index in a database?

What is a view in a relational database?

What is a transaction in a database context?

What is an entity in a model?

What are fields in an entity model?

How do you identify fields in an entity?

What is the purpose of defining fields in a model?

Can an entity have multiple fields?

What is an example of a field in a 'Customer' entity?

What is the relationship between entities and fields?

Why is it important to identify fields correctly?

What tool can help in identifying fields for an entity?

What does a field's data type determine?

What is the purpose of selecting key fields for an entity?

Which of the following is a key field?

What type of data is typically used for key fields?

Can a key field be a combination of multiple fields?

Which entity might have a key field of 'ISBN'?

What is a primary key?

Why is it important to avoid null values in key fields?

Which of the following is NOT a characteristic of key fields?

What is a foreign key?

In a customer entity, which field could serve as a key field?

What is an entity in computer science?

What does a relationship represent in a database?

Which term describes the attributes of an entity?

What is a primary key?

What is a foreign key used for?

What does normalization do in database design?

Which diagram is commonly used to represent entity relationships?

What type of relationship allows multiple instances of one entity to relate to multiple instances of another?

What is an example of a weak entity?

What does the term 'cardinality' refer to in relationships?

What is the primary purpose of normalization in databases?

Which normal form eliminates duplicate columns from the same table?

What does 2NF require in addition to 1NF?

Which normal form addresses transitive dependencies?

What is a benefit of normalization?

Normalization can help with which of the following?

What is denormalization?

Which of the following is NOT a normal form?

What is the main goal of database normalization?

Normalization can lead to which of the following?