DOGs (Data Object Graphs) — Learn free

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Questions 1–10 of 10

1. What does a Data Object Graph (DOG) represent?
Question 1A. Data objects and the relationships between them in the form of a graphB. The physical layout of disks in a data centreC. A timeline of database backupsD. A bar chart of sales by regionE. A list of user passwords
2. In a Data Object Graph, what does a node represent?
Question 2A. A relationship such as 'buys' or 'manages'B. A data object such as Customer, Product, Order or EmployeeC. A foreign keyD. A column in a tableE. A server in the network
3. Which of the following is an example of an edge in a Data Object Graph?
Question 3A. CustomerB. ProductC. works inD. EmployeeE. Order
4. What is the main focus of the Data Object Graph way of representing data?
Question 4A. How much storage each object usesB. How objects are physically stored on diskC. How quickly objects can be deletedD. How objects are connected rather than how they are storedE. How objects are encrypted
5. What limitation of traditional relational tables do Data Object Graphs address?
Question 5A. Tables cannot store numbersB. Tables are too small for business dataC. Tables cannot be queriedD. Tables require no primary keysE. The table structure sometimes hides the complexity of relationships in deeply interconnected data
6. Which of the following is NOT listed as an area where Data Object Graphs are especially useful?
Question 6A. Payroll calculationB. Fraud detectionC. Recommendation systemsD. Impact analysisE. Data lineage tracking
7. How do relational modelling and Data Object Graphs differ in handling relationships?
Question 7A. Relational models have no relationships at allB. Relational models handle relationships with foreign keys, whereas in a Data Object Graph relationships are first-class citizensC. Data Object Graphs use foreign keys and relational models use edgesD. Both store relationships in exactly the same wayE. Data Object Graphs cannot represent relationships
8. In the school example of a Data Object Graph, how would you answer 'Which students are connected to Mr. Ali?'
Question 8A. By sorting the students alphabeticallyB. By counting the number of subjectsC. By following the graph connections from Mr. Ali through 'teaches' and 'studies' edges to the studentsD. By reading the school timetableE. By asking each student individually
9. Which kind of question do Data Object Graphs help answer?
Question 9A. How many rows does a table contain?B. What is the average column width?C. Which disk holds the backup?D. What systems are affected if one data object changes?E. Which SQL dialect is in use?
10. Why are Data Object Graphs said to model the real world more naturally?
Question 10A. Because they use fewer bytes than tablesB. Because they are drawn in colourC. Because they eliminate the need for dataD. Because real-world data is always numericE. Because the real world itself is a network of connected entities