Database Design Using Normalization Questions and Answers
Database Design Using Normalization questions with answers focus on organizing database structures efficiently by minimizing redundancy and ensuring data integrity. This is a key topic in programming interview questions with answers and technical tests conducted by companies like TCS, Infosys, and Wipro. Normalization involves dividing large tables into smaller, related ones to optimize database performance. Understanding various normal forms (1NF, 2NF, 3NF, BCNF) helps developers design efficient relational databases. Practicing normalization aptitude and programming questions enables candidates to solve real-world database design challenges during coding and placement exams.
Understand database normalization techniques. Also explore logical database design and physical database design
Database Design Using Normalization
1. Needing to using more complicated SQL in database applications is a(n) ________ of normalization.
- advantage
- disadvantage
- either an advantage or disadvantage
- neither an advantage nor disadvantage
2. Eliminating modification anomalies is a(n) ________ of normalization.
- advantage
- disadvantage
- either an advantage or disadvantage
- neither an advantage nor disadvantage
3. Multivalued dependencies should ________ be eliminated.
- always
- commonly
- seldom
- never
4. Using the SQL GROUP BY phrase with a SELECT statement can help detect which of the following problems?
- The multivalue, multicolumn problem
- The inconsistent values problem
- The missing values problem
- The general-purpose remarks column problem
5. When assessing the table structure of an acquired set of tables with data, determining foreign keys is (part of) the:
- first step.
- second step.
- third step.
- fourth step.
6. Creating a read-only database is a task that is ________ assigned to beginning database professionals.
- always
- commonly
- seldom
- never
7. Each answer below shows example data from a table. Which answer is an example of the general-purpose remarks column problem?
- Three columns have the values 534-2435, 534-7867, and 546-2356 in the same row.
- Three rows have the values Brown Small Chair, Small Chair Brown, and Small Brown Chair in the same column.
- Three rows have the values Brown, NULL, and Blue in the same column.
- One row has the value "He is interested in a Silver Porsche from the years 1978-1988" in a column.
8. For a number of reasons, normalizations is not often an advantage for a(n) ________ database.
- read-only
- updateable
- either a read-only or an updateable
- None of the above is correct.
9. Most of the time, modification anomalies are serious enough that tables should be normalized into:
- 1NF.
- 2NF.
- 3NF.
- BCNF.
10. Each answer below shows example data from a table. Which answer is an example of the missing values problem?
- Three columns have the values 534-2435, 534-7867, and 546-2356 in the same row.
- Three rows have the values Brown Small Chair, Small Chair Brown, and Small Brown Chair in the same column.
- Three rows have the values Brown, NULL, and Blue in the same column.
- One row has the value "He is interested in a Silver Porsche from the years 1978-1988" in a column.