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MCQs

Total Questions : 286 | Page 20 of 29 pages
Question 191. Data encryption techniques are particularly useful for
  1.    reducing storage space requirements
  2.    improving data integrity
  3.    protecting data in data communication systems
  4.    All of the above
  5.    None of the above
 Discuss Question
Answer: Option C. -> protecting data in data communication systems
Question 192. Which of the following is not an advantage of the data-base approach?
  1.    elimination of the data redundancy
  2.    ability to associate related data
  3.    increased security
  4.    program/data independence
  5.    All of the above are advantages
 Discuss Question
Answer: Option E. -> All of the above are advantages
Question 193. A data dictionary doesn't provide information about:
  1.    where data is located
  2.    the size of the disk storage device
  3.    It allows a many-to-many relationship
  4.    It is conceptually simple
  5.    It will be the dominant data base of the future
 Discuss Question
Answer: Option B. -> the size of the disk storage device
Question 194. 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
 Discuss Question
Answer: Option B. -> processing functions
Question 195. 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
 Discuss Question
Answer: Option C. -> CREATE USER
Question 196. 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
 Discuss Question
Answer: Option A. -> One-to-one relationship
Question 197. 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
 Discuss Question
Answer: Option A. -> you enter the search value into the form
Question 198. 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
 Discuss Question
Answer: Option C. -> Relational
Question 199. In any hierarchy of data organization, the smallest entity to be processed as a single unit is called
  1.    data field
  2.    data record
  3.    data file
  4.    database
  5.    None of the above
 Discuss Question
Answer: Option A. -> data field
Question 200. The model for a record management system might be
  1.    handwritten list
  2.    a Rolodex card file
  3.    a business form
  4.    All of the above
  5.    None of the above
 Discuss Question
Answer: Option D. -> All of the above

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