1D0-541

Review 124 1D0-541 practice questions with answer explanations and community insights.

Question 1

With regard to databases, what is normalization?

  1. The process of reducing the cardinality of a relation
  2. The process of organizing and refining relations
  3. The process of duplicating data to reduce the number of tables
  4. The process of limiting data stored in a table to a specific range of values

Question 2

Which three pieces of information did E.F. Codd describe as necessary to retrieve a data value from a relational database?

  1. Attribute, domain, and tuple
  2. Entity, relation name, and domain
  3. Table name, primary key, and entity
  4. Attribute, relation name, and primary key

Question 3

What is a virtual table?

  1. A virtual table is a relation created as the result of data manipulation; it exists only in computer memory, and is not a permanent part of the database.
  2. A virtual table is a relation stored in the database; it is used when multiple users access the same relation in a database.
  3. A virtual table is a relation derived from the database data dictionary; it contains metadata about a base relation. A virtual table is a relation derived from the database? data dictionary; it contains metadata about a base relation.
  4. A virtual table is a relation that consists of primary and foreign keys for a particular set of relations in a database.

Question 4

Your enterprise has reached the conceptual design phase for a database project. What is the desired goal at the end of this design phase?

  1. A set of normalized relations
  2. A reviewed entity-relationship (ER) model
  3. An entity-relationship (ER) model with no redundant data
  4. A set of denormalized relations

Question 5

In which phase of database design do you identify entities, attribute domains, and relationships?

  1. Logical
  2. Physical
  3. Application
  4. Conceptual
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