Test
CET_TARDE - MTA Database - STANDARDS
Preguntas del test (5)
1First normal form requires that a database excludes:
- AForeign keys
- BComposite keys
- CDuplicate rows
- DRepeating groups
2Denormalization is performed in order to:
- AReduce redundancy.
- BEliminate repeating groups.
- CCreate smaller tables.
- DImprove query performance.
3You have a table that contains the following data image.
This process is referred to as:
- Adefragmentation
- Bnormalization
- Cfragmentation
- Ddenormalization
4This question requires that you evaluate the underlined text to determine if it is correct. You combine data from three tables into one table. The new table includes redundancy to optimize read performance. The data in the new table has been denormalized.
Instructions: Review the underlined text. If it makes the statement correct, select “No change is needed.” If the statement is incorrect, select the answer choice that makes the statement correct.- ANo change is needed
- BNormalized
- CTruncated
- DIndexed
5You work at a restaurant and they ask you to help them with a data issue. They provide you with the following recipe data image:
You need to normalize the data to third normal form. How many tables should you create?
- A1
- B2
- C3
- D4
Información
- Descripción
- Database Fundamentals Quizzes preparing to certification
- Autor
- Hawerth Castro
- Idioma
- Português
- Visitas
- 93
- Etiquetas
- Valoración
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