- 1 What is an ERD Why do we use them?
- 2 What is role of ER diagram in software testing?
- 3 What is an entity in cybersecurity?
- 4 How would you describe ERD?
- 5 What are the types of cardinality?
- 6 What are the advantages of ER diagram?
- 7 What are ER methods?
- 8 What are the three elements of ERD?
- 9 What is ER diagram explain with example?
- 10 What is SIEM and how it works?
- 11 What is SIEM Logging?
- 12 What do you call a person who intends to do harm cyber security?
- 13 How do you read an ERD diagram?
- 14 How cardinality is written in ER diagram?
- 15 What does double line mean in ER diagram?
What is an ERD Why do we use them?
An entity relationship diagram ( ERD ) shows the relationships of entity sets stored in a database. By defining the entities, their attributes, and showing the relationships between them, an ER diagram illustrates the logical structure of databases. ER diagrams are used to sketch out the design of a database.
What is role of ER diagram in software testing?
Entity relationship diagrams are used in software engineering during the planning stages of the software project. They help to identify different system elements and their relationships with each other. It is often used as the basis for data flow diagrams or DFD’s as they are commonly known.
What is an entity in cybersecurity?
A person, organization, or other entity which requests access to and uses the resources of a computer system or network.
How would you describe ERD?
An entity relationship diagram ( ERD ), also known as an entity relationship model, is a graphical representation that depicts relationships among people, objects, places, concepts or events within an information technology (IT) system.
What are the types of cardinality?
Values of cardinality When dealing with columnar value sets, there are three types of cardinality: high- cardinality, normal- cardinality, and low- cardinality. High- cardinality refers to columns with values that are very uncommon or unique.
What are the advantages of ER diagram?
Advantages of E – R model The data requirements are easily understandable using an E – R model as it utilises clear diagrams. The E-R model can be easily converted into a relational database. The E-R diagram is very easy to understand as it has clearly defined entities and the relations between them.
What are ER methods?
ERM is a database modeling technique that generates an abstract diagram or visual representation of a system’s data that can be helpful in designing a relational database. These diagrams are known as entity-relationship diagrams, ER diagrams or ERDs.
What are the three elements of ERD?
The Entity Relationship Diagram ( ERD ) is a graphical representation of an ERM and is currently one of the most popular and widely used database design tools. The three main components of the ER Model are entities, attributes and relationships.
What is ER diagram explain with example?
ER diagrams are created based on three basic concepts: entities, attributes and relationships. ER Diagrams contain different symbols that use rectangles to represent entities, ovals to define attributes and diamond shapes to represent relationships. At first look, an ER diagram looks very similar to the flowchart.
What is SIEM and how it works?
SIEM software works by collecting log and event data generated by an organizations applications, security devices and host systems and bringing it together into a single centralized platform. In this way it detects threats and creates security alerts.
What is SIEM Logging?
Security Information and Event Management ( SIEM ) is a set of tools and services offering a holistic view of an organization’s information security. SIEM tools provide: Event log management that consolidates data from numerous sources.
What do you call a person who intends to do harm cyber security?
attacker. Definition: An individual, group, organization, or government that executes an attack. Extended Definition: A party acting with malicious intent to compromise an information system.
How do you read an ERD diagram?
You read the diagrams first from left to right and then from right to left. In the case of the name-address relationship in following figure, you read the relationships as follows: names can be associated with zero or exactly one address; addresses can be associated with zero, one, or many names.
How cardinality is written in ER diagram?
In an ER diagram, cardinality is represented as a crow’s foot at the connector’s ends. The three common cardinal relationships are one-to-one, one-to-many, and many-to-many.
What does double line mean in ER diagram?
Total Participation − Each entity is involved in the relationship. Total participation is represented by double lines. Partial participation − Not all entities are involved in the relationship. Partial participation is represented by single lines.