NETWORK DATA MODELLING — Learn free

Self-check

Questions 1–10 of 10

1. How does Network Data Modelling organise data?
Question 1A. Using owner–member sets that allow records to participate in multiple parent and child relationshipsB. Using a strict tree in which each child has exactly one parentC. Using fact tables surrounded by dimension tablesD. Using JSON documents with embedded arraysE. Using classes with attributes and methods
2. What limitation of hierarchical databases was the network model designed to overcome?
Question 2A. The lack of atomic valuesB. The restriction that each child could have only one parentC. The absence of primary keysD. The inability to store repayment historyE. The need for declarative queries
3. Through which group and system did the network model gain prominence in the 1960s?
Question 3A. ODMG and ObjectStoreB. IBM and IMSC. The CODASYL Data Base Task Group and IDMSD. W3C and RDFE. Apache and Cassandra
4. In the network model loan example, which relationship is described as many-to-many?
Question 4A. Customer → LoanApplicationB. LoanApplication → BranchC. LoanApplication → RepaymentD. LoanApplication → LoanOfficerE. Branch → Customer
5. What kind of querying does the network model require?
Question 5A. Declarative SQL queriesB. Semantic reasoning over classes and rulesC. Full-text searchD. Map-reduce aggregationE. Navigational querying in which developers explicitly define how to traverse from record to record
6. Which of the following is NOT listed as a weakness of network data modelling?
Question 6A. Inability to represent many-to-many relationshipsB. Requirement for procedural navigation that makes ad-hoc analysis difficultC. Schema changes rippling into application logicD. Lack of the mathematical foundation provided by relational databasesE. Lack of relational abstraction
7. Which modern technology carries on the network model's idea of interconnected records?
Question 7A. Star schema data warehousesB. Graph databasesC. Key–value cachesD. Columnar analytical storesE. Object-relational mapping frameworks
8. What is the core difference between the network model and an ontology?
Question 8A. The network model is drawn as a tree while an ontology is drawn as a graphB. The network model is a modern AI technique while an ontology is a 1960s storage techniqueC. The network model is a storage technique using physical pointers, whereas an ontology is a knowledge representation model focused on meaning and reasoningD. The network model uses SQL while an ontology uses procedural codeE. They differ only in the vendors that support them
9. How do queries in ontology-based systems differ from queries in the network model?
Question 9A. Ontology queries must specify the traversal path explicitlyB. Ontology queries are limited to a single parent–child levelC. Ontology queries require physical pointers between recordsD. Ontology queries are declarative and semantic, using reasoning over classes, properties and rules rather than a traversal pathE. Ontology queries can only return counts
10. Which statement about semantics in the network model is correct?
Question 10A. The network model defines relationships such as Loan is_a FinancialAgreementB. The network model can infer new facts from class definitionsC. The network model automatically classifies high-risk loansD. The network model encodes inheritance hierarchiesE. The network model has no inherent semantic understanding; it stores and traverses links without knowing what a Customer or Loan represents