Database Systems(Computer Science ) Questions and Answers

Question 1. In SQL, which of the following is not a data Manipulation Language Commands?
  1.    DELETE
  2.    SELECT
  3.    UPDATE
  4.    CREATE
  5.    None of the above
Explanation:-
Answer: Option D. -> CREATE
Question 2. Which of the following is not characteristic of a relational database model?
  1.    tables
  2.    treelike structure
  3.    complex logical relationships
  4.    records
  5.    None of the above
Explanation:-
Answer: Option B. -> treelike structure
Question 3. In SQL, the CREATE VIEW command is used
  1.    to recompile view
  2.    to define a view of one or more tables or views
  3.    to recompile a table
  4.    to create a trigger
  5.    None of the above
Explanation:-
Answer: Option B. -> to define a view of one or more tables or views
Question 4. A computer file contains several records. What does each record contain?
  1.    Bytes
  2.    Words
  3.    Fields
  4.    Database
  5.    None of the above
Explanation:-
Answer: Option C. -> Fields
Question 5. A ____ Contains the smallest unit of meaningful data, so you might call it the basic building block for a data file.
  1.    File structure
  2.    Records
  3.    Fields
  4.    Database
  5.    None of the above
Explanation:-
Answer: Option C. -> Fields
Question 6. In the DBM approach, application programs perform the
  1.    storage function
  2.    processing functions
  3.    access control
  4.    All of the above
  5.    None of the above
Explanation:-
Answer: Option B. -> processing functions
Question 7. In SQL, which command is used to create a database user?
  1.    ADD USER TO DATABASE
  2.    MK USER
  3.    CREATE USER
  4.    All of the above
  5.    None of the above
Explanation:-
Answer: Option C. -> CREATE USER
Question 8. When performing a look-up operation using a form
  1.    you enter the search value into the form
  2.    you look at each form sequentially until you see the one you want
  3.    you type the key in an entry line, and the correct form is displayed
  4.    All of the above
  5.    None of the above
Explanation:-
Answer: Option A. -> you enter the search value into the form
Question 9. A _____ database does not use pointers or physical links, but instead finds related records by examining the contents of fields.
  1.    Network
  2.    Hierarchical
  3.    Relational
  4.    Object-Oriented
  5.    None of the above
Explanation:-
Answer: Option C. -> Relational
Question 10. A _____ means that one record in a particular record type is related to only one record of another record type.
  1.    One-to-one relationship
  2.    One-to-many relationship
  3.    Many-to-one relationship
  4.    Many-to-many relationship
  5.    None of the above
Explanation:-
Answer: Option A. -> One-to-one relationship
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