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Higher 2024

Quiz by Suzanne Miller

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36 questions
Show answers
  • Q1
    What is a compound key in a database?
    A single column key that identifies a row
    A foreign key that references another table
    An index that speeds up query results
    A combination of two or more columns that uniquely identifies a row
    30s
  • Q2
    Which of the following is an example of a compound key?
    PhoneNumber
    DateOfBirth
    CustomerID and OrderID
    EmailAddress
    30s
  • Q3
    In what scenario would you use a compound key?
    When you want to eliminate redundancy
    When no single column can uniquely identify records
    When the table has a primary key
    When all columns are unique
    30s
  • Q4
    Which of the following statements about compound keys is true?
    They can be used as primary keys in a database table
    They are always generated automatically
    They are only used in relational databases
    They cannot include foreign keys
    30s
  • Q5
    What is a common use of compound keys in relational databases?
    To simplify data retrieval procedures
    To store data in a flat format
    To create a unique identifier for a many-to-many relationship
    To prevent duplicate records in a single column
    30s
  • Q6
    Which of the following scenarios is NOT appropriate for using a compound key?
    When combining two or more fields provides uniqueness
    When managing relationships between different tables
    When implementing a many-to-many relationship
    When a single column can uniquely identify each record
    30s
  • Q7
    What is the main advantage of using a compound key?
    It allows for more complex queries and data relationships
    It simplifies database design
    It guarantees faster data retrieval
    It encrypts sensitive information
    30s
  • Q8
    What must you ensure when defining a compound key?
    The key can never contain null values
    The combination of values must be unique for each record
    The key must consist of at least three columns
    The values must be of the same data type
    30s
  • Q9
    In a compound key, what happens if one of the columns contains null values?
    The compound key cannot guarantee uniqueness
    The database will reject the entry
    The compound key is automatically corrected
    The null values are ignored
    30s
  • Q10
    Which of the following best describes how to create a compound key in SQL?
    Using a PRIMARY KEY constraint on multiple columns
    Setting unique constraints on single columns
    Adding an INDEX on multiple columns
    Defining FOREIGN KEY references
    30s
  • Q11
    Which of the following is a key principle of Agile methodologies?
    Following a fixed plan over adapting to change
    Individual tasks over team collaboration
    Extensive documentation over working software
    Customer collaboration over contract negotiation
    30s
  • Q12
    What is a common practice in Agile methodologies for tracking project progress?
    Daily stand-up meetings
    Monthly status reports
    Individual performance appraisals
    Formal project reviews every six months
    30s
  • Q13
    Which of the following is NOT a characteristic of Agile methodologies?
    Adaptability to changing requirements
    Rigid adherence to a predefined plan
    Frequent delivery of working software
    Emphasis on teamwork and collaboration
    30s
  • Q14
    What is one major problem with using global variables in programming?
    They automatically manage memory.
    They always improve performance.
    They can only be used in one function.
    They can lead to code that is difficult to debug.
    30s
  • Q15
    What is a primary reason to limit the use of global variables in team-based software development?
    They can cause conflicts between team members' code.
    They always provide up-to-date information.
    They make collaboration easier across different components.
    They are faster to access than local variables.
    30s

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