Explain Data Concepts DA0-001 Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   Which of the following is a common real-world example of a hierarchical data structure?

   • AA company's organizational chart showing reporting lines
   • BA relational database with a table of orders and a table of order items
   • CA social network where users can be friends with anyone
   • DA spreadsheet containing customer names and addresses
   Reveal Solution Discussion Select an answer first
2. 2foundation · easy

   A database column is defined to store a person's full name, such as 'Jane Doe'. Which data type should be used for this column?

   • AString
   • BBoolean
   • CInteger
   • DFloat
   Reveal Solution Discussion Select an answer first
4. 3foundation · easy

   What is the defining characteristic of a hierarchical data structure?

   • AData is stored in a single flat table with no relationships
   • BData is organized in a graph with no defined root
   • CEach child node can have multiple parent nodes
   • DEach node has exactly one parent, except for the root node
   Reveal Solution Discussion Select an answer first
5. 4foundation · easy

   In which of the following scenarios is XML most likely to be used?

   • AStoring a simple list of customer names in a single text file
   • BExchanging structured documents between different systems in a standardized format
   • CSending lightweight data between a web browser and a server in a REST API
   • DStoring high-resolution images for a photo editing application
   Reveal Solution Discussion Select an answer first
6. 5application · easy

   A small business receives a daily inventory report from a supplier as a plain-text file. Each line represents one product with fields for product ID (integer), product name (string), and quantity in stock (integer), separated by commas. The business owner wants to open this file in a spreadsheet application to review the data. What is the most appropriate action?

   • AOpen the file directly in the spreadsheet application, which will parse the comma-separated values into columns.
   • BRename the file extension to .xlsx so the spreadsheet application recognizes it.
   • CConvert the file to JSON before opening it in the spreadsheet application.
   • DManually copy each line into a separate cell in the spreadsheet.
   Reveal Solution Discussion Select an answer first