logo

CuriousTab

CuriousTab

Discussion


Home Database Data Models into Database Designs See What Others Are Saying!
  • Question
  • Which of the following columns is(are) are required in a table?


  • Options
  • A. A foreign key
  • B. An alternate key
  • C. A primary key
  • D. A surrogate key.

  • Correct Answer
  • A primary key 


  • More questions

    • 1. Composition does not allow an object to be part of more than one aggregate object.

    • Options
    • A. True
    • B. False
    • Discuss
    • 2. The default extension for SQL*Plus is .sql.

    • Options
    • A. True
    • B. False
    • Discuss
    • 3. Entities of a given type are grouped into a(n):

    • Options
    • A. database.
    • B. entity class.
    • C. attribute.
    • D. ERD.
    • Discuss
    • 4. A UML diagram includes which of the following?

    • Options
    • A. Class name
    • B. List of attributes
    • C. List of operations
    • D. All of the above.
    • Discuss
    • 5. What is the overall responsibility of the DBA?

    • Options
    • A. Facilitate the development and use of the database
    • B. Create and populate tables
    • C. Development, operation, and maintenance of the database and its applications
    • D. Both the first and third answers above are correct.
    • Discuss
    • 6. The ODBC Level 1 API contains which of the following functions?

    • Options
    • A. Browse possible connections and data sources only
    • B. Connect to data sources with driver-specific information only
    • C. Process a scrollable cursor only
    • D. Both 1 and 3 above are in the OBDC Level 1 API.
    • Discuss
    • 7. SERIALIZABLE is the strictest isolation level.

    • Options
    • A. True
    • B. False
    • Discuss
    • 8. A key:

    • Options
    • A. must always be composed of two or more columns.
    • B. can only be one column.
    • C. identifies a row.
    • D. identifies a column.
    • Discuss
    • 9. Structured data may include which of the following?

    • Options
    • A. Photo image
    • B. Video clip
    • C. Dates
    • D. None of the above.
    • Discuss
    • 10. Which of the following is not a restriction for a table to be a relation?

    • Options
    • A. The cells of the table must contain a single value.
    • B. All of the entries in any column must be of the same kind.
    • C. The columns must be ordered.
    • D. No two rows in a table may be identical.
    • Discuss


    Comments

    There are no comments.

Enter a new Comment