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Free DP-900 Exam Braindumps (page: 17)

Page 16 of 72
PDF with 306 Questions

You have structured data in tabular format.
What represents an individual instance of a data entity?

  1. a column
  2. a table
  3. a cell
  4. a row

Answer(s): D

Explanation:

Each entity object instance represents a row in the database table and stores its data. There is only one instance per row.


Reference:

https://docs.oracle.com/cd/A97335_02/apps.102/bc4j/developing_bc_projects/bc_awhatisaneo.htm



HOTSPOT (Drag and Drop is not supported)
Select the answer that correctly completes the sentence.

  1. See Explanation section for answer.

Answer(s): A

Explanation:



Box: structured data
Is relational data a structured data?
The best example of structured data is the relational database: the data has been formatted into precisely defined fields, such as credit card numbers or address, in order to be easily queried with SQL.


Reference:

https://www.talend.com/resources/structured-vs-unstructured-data/



What is a difference between structured data and semi-structured data?

  1. Structured data has a fixed schema and semi-structured data has a flexible schema.
  2. Only Structured data supports entities.
  3. Structured data has a flexible schema and semi-structured data has a fixed schema.
  4. Only Structured data supports attributes.

Answer(s): A

Explanation:

Structured data
In structured data, sometimes called relational data, all data has the same fields or properties. All the data has the same organization and shape, or schema. The shared schema allows this type of data to be easily searched by using query languages like Structured Query Language (SQL). This capability makes this data style perfect for applications like CRM systems, reservations, and inventory management.

Structured data often is stored in database tables with rows and columns. In the table, a key column indicates how one row in a table relates to data in another row of another table.
Semi-structured data is less organized than structured data. Semi-structured data isn't stored in a relational format because the fields don't fit neatly into tables, rows, and columns. Semi-structured data contains tags that make the organization and hierarchy of the data apparent. One example is key/value pairs. Semi-structured data is also referred to as non-relational or not only SQL (NoSQL) data.


Reference:

https://learn.microsoft.com/en-us/training/modules/choose-storage-approach-in-azure/2-classify-data



HOTSPOT (Drag and Drop is not supported)
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
NOTE: Each correct selection is worth one point.

  1. See Explanation section for answer.

Answer(s): A

Explanation:



Box 1: No
Data engineers apply data cleansing routines.

Data Engineer involves in preparing data. They develop, constructs, tests & maintain complete architecture.

Box 2: No
Database administrators manage databases, store backup copies of data, etc.

Box 3: Yes
Data Analyst analyzes numeric data and uses it to help companies make better decisions.


Reference:

https://www.edureka.co/blog/data-analyst-vs-data-engineer-vs-data-scientist/






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