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1. Top results related to what are the different types of silhouette patterns in architecture

   • What are the different types of keys in RDBMS?

     Top Answer

     Answered Nov 10, 2009 · 21 votes

     From here and here: (after i googled your title)

     • Alternate key - An alternate key is any candidate key which is not selected to be the primary key
     • Candidate key - A candidate key is a field or combination of fields that can act as a primary key field for that table to uniquely identify each record in that table.
     • Compound key - compound key (also called a composite key or concatenated key) is a key that consists of 2 or more attributes.
     • Primary key - a primary key is a value that can be used to identify a unique row in a table. Attributes are associated with it. Examples of primary keys are Social Security numbers (associated to a specific person) or ISBNs (associated to a specific book). In the relational model of data, a primary key is a candidate key chosen as the main method of uniquely identifying a tuple in a relation.
     • Superkey - A superkey is defined in the relational model as a set of attributes of a relation variable (relvar) for which it holds that in all relations assigned to that variable there are no two distinct tuples (rows) that have the same values for the attributes in this set. Equivalently a superkey can also be defined as a set of attributes of a relvar upon which all attributes of the relvar are functionally dependent.
     • Foreign key - a foreign key (FK) is a field or group of fields in a database record that points to a key field or group of fields forming a key of another database record in some (usually different) table. Usually a foreign key in one table refers to the primary key (PK) of another table. This way references can be made to link information together and it is an essential part of database normalization

     Other Answers

     Answered Sep 21, 2014 · 89 votes

     (I) Super Key – An attribute or a combination of attribute that is used to identify the records uniquely is known as Super Key. A table can have many Super Keys.

     E.g. of Super Key

     • ID
     • ID, Name
     • ID, Address
     • ID, Department_ID
     • ID, Salary
     • Name, Address
     • Name, Address, Department_ID

     So on as any combination which can identify the records uniquely will be a Super Key.

     (II) Candidate Key – It can be defined as minimal Super Key or irreducible Super Key. In other words an attribute or a combination of attribute that identifies the record uniquely but none of its proper subsets can identify the records uniquely.

     E.g. of Candidate Key

     • ID
     • Name, Address

     For above table we have only two Candidate Keys (i.e. Irreducible Super Key) used to identify the records from the table uniquely. ID Key can identify the record uniquely and similarly combination of Name and Address can identify the record uniquely, but neither Name nor Address can be used to identify the records uniquely as it might be possible that we have two employees with similar name or two employees from the same house.

     (III) Primary Key – A Candidate Key that is used by the database designer for unique identification of each row in a table is known as Primary Key. A Primary Key can consist of one or more attributes of a table.

     E.g. of Primary Key - Database designer can use one of the Candidate Key as a Primary Key. In this case we have “ID” and “Name, Address” as Candidate Key, we will consider “ID” Key as a Primary Key as the other key is the combination of more than one attribute.

     (IV) Foreign Key – A foreign key is an attribute or combination of attribute in one base table that points to the candidate key (generally it is the primary key) of another table. The purpose of the foreign key is to ensure referential integrity of the data i.e. only values that are supposed to appear in the database are permitted.

     E.g. of Foreign Key – Let consider we have another table i.e. Department Table with Attributes “Department_ID”, “Department_Name”, “Manager_ID”, ”Location_ID” with Department_ID as an Primary Key. Now the Department_ID attribute of Employee Table (dependent or child table) can be defined as the Foreign Key as it can reference to the Department_ID attribute of the Departments table (the referenced or parent table), a Foreign Key value must match an existing value in the parent table or be NULL.

     (V) Composite Key – If we use multiple attributes to create a Primary Key then that Primary Key is called Composite Key (also called a Compound Key or Concatenated Key).

     E.g. of Composite Key, if we have used “Name, Address” as a Primary Key then it will be our Composite Key.

     (VI) Alternate Key – Alternate Key can be any of the Candidate Keys except for the Primary Key.

     E.g. of Alternate Key is “Name, Address” as it is the only other Candidate Key which is not a Primary Key.

     (VII) Secondary Key – The attributes that are not even the Super Key but can be still used for identification of records (not unique) are known as Secondary Key.

     E.g. of Secondary Key can be Name, Address, Salary, Department_ID etc. as they can identify the records but they might not be unique.

     Other Answers

     Answered Nov 10, 2009 · 9 votes

     Ólafur forgot the surrogate key:

     A surrogate key in a database is a unique identifier for either an entity in the modeled world or an object in the database. The surrogate key is not derived from application data.

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     1/5

   • What are the different types of storage in HTML5 ?

     In this article, you will get to know about different types of Web storage in HTML5. The web storage is more secure and large amounts of data can be stored locally on the client-side web browser. All the data is stored in key-value pairs. 

     In HTML5 there are two types of web storage API.

     • localStorage
     • SessionStorage

     localStorage: It is used to store data on the client side. It has no expiration time, so the data in the LocalStorage exists always till the user manually deletes it.

     Syntax:

     • For storing data in web storage: The key and value both should be string or number;

     LocalStorage.setItem("key", "value");

     • For getting data from web storage: We will pass the key and it will return value.

     LocalStorage.getItem("key");

     Example: In this example, we will use local storage.

     HTML

     <!DOCTYPE html><html><head>    <style>        body {            color: green;            text-align: center;font size...

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     2/5

   • What are the different types of errors in python?

     Top Answer

     Answered Feb 09, 2015 · 3 votes

     These errors can, and should, be defined by modules and projects as they are developed - so, there is no limited and "closed" set of errors like you are asking for.

     Python introspection capabilities allow one to see, through the interactive console, which errors are defined as derived directly from "Exception" - but there could be more:

     >>> [err.__name__ for err in Exception.__subclasses__()]['TypeError', 'StopIteration', 'ImportError', 'OSError', 'EOFError', 'RuntimeError', 'NameError', 'AttributeError', 'SyntaxError', 'LookupError', 'ValueError', 'AssertionError', 'ArithmeticError', 'SystemError', 'ReferenceError', 'BufferError', 'MemoryError', 'Warning', 'error', 'Error']

     Note that exception itself is derived from BaseException, which subclasses are not limited to "error" exceptions, but to Exceptions used in flow control as well:

     >>> [err.__name__ for err in BaseException.__subclasses__()]['Exception', 'GeneratorExit', 'SystemExit', 'KeyboardInterrupt']

     Bottom line: knowing the total number of errors is impossible and irrelevant for learning the language. Each function/library you are dealing with can define new ones, and you should check the documentation to know which exceptions they can throw.

     (On a side note, the __sublass__ method I used above does return a list of the classes that are direct descendants of that class. I them pick the __name__ attribute of each class to display)

     The document posted by @GP89 in the comments will also show the errors which are not direct descendants of exception: https://docs.python.org/2/library/exceptions.html#exception-hierarchy

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     3/5

   • What are the different types of props can be send from one component to the other using properties in React?

     Top Answer

     Answered Sep 21, 2018 · 1 votes

     I'm not sure if you've just structured this question in a way that makes it a little difficult to understand but with React, you can send any complex object via the props.

     Prop types are simply there as a way to strongly type what you expect to be passed down.

     Check out the docs to see all the accepted prop types for React:

     https://reactjs.org/docs/typechecking-with-proptypes.html

     Taking specific note of the fact you can both create your own custom validator, or even set it to "any" which means it doesn't care what the type is as long as it's there:

     // A value of any data type requiredAny: PropTypes.any.isRequired, // You can also specify a custom validator. It should return an Error // object if the validation fails. Don't `console.warn` or throw, as this // won't work inside `oneOfType`. customProp: function(props, propName, componentName) { if (!/matchme/.test(props[propName])) { return new Error( 'Invalid prop `' + propName + '` supplied to' + ' `' + componentName + '`. Validation failed.' ); } },

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     4/5

   • What are the different types of Nodes in a Tree

     Trees are nonlinear data structures that organize data hierarchically and in a recursive manner. 

     It is a method of organizing and storing data in the computer in a way that makes it more effective to use. Nodes in the graph are connected via edges. It has different types of nodes which are called parent node, child node, leaf node, etc.

     What is a root node?

     A node that is the first or topmost node in a tree is called a root node. In every tree, there is always one root node, which is the only node that has never previously been connected to another node.

     The root node in this tree is node (A).

     Importance of root node:

     • The root node, which has no parents, is the highest node in the tree structure. 
     • The entire message is represented by this node, which is a global element. 

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3. pubs.opengroup.org › architecture › togaf9-docThe TOGAF Standard, Version 9.2 - Architecture Patterns

   pubs.opengroup.org › architecture › togaf9-doc

   • Cached

   22.1.3.3 Patterns and Views. Architecture views are selected parts of one or more models representing a complete system architecture, focusing on those aspects that address the concerns of one or more stakeholders. Patterns can provide help in designing such models, and in composing views based on them.

4. www.geeksforgeeks.org › types-of-softwareTypes of Software Architecture Patterns - GeeksforGeeks

   www.geeksforgeeks.org › types-of-software

   • Cached

   • Layered Pattern : As the name suggests, components(code) in this pattern are separated into layers of subtasks and they are arranged one above another.
   • Client-Server Pattern : The client-server pattern has two major entities. They are a server and multiple clients. Here the server has resources(data, files or services) and a client requests the server for a particular resource.
   • Event-Driven Pattern : Event-Driven Architecture is an agile approach in which services (operations) of the software are triggered by events. Well, what does an event mean?
   • Microkernel Pattern : Microkernel pattern has two major components. They are a core system and plug-in modules. The core system handles the fundamental and minimal operations of the application.

5. Videos

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     40 Types of Architecture styles.

     Dec 31, 2020

     151.5K Views

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     🤩 Introduction To Silhouette Studio For Beginners

     Jun 30, 2020

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6. www.simform.com › blog › software-architecture-patterns10 Software Architecture Patterns You Must Know About - Simform

   www.simform.com › blog › software-architecture-patterns

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   • Layered Architecture Pattern. You’ve probably heard of multi-layered, aka tiered architecture, or n-tier architecture. This architecture has gained popularity amongst designers and software architects alike for its commonalities with the conventional arrangements of IT communications in many startups and established enterprises.
   • Event-driven Architecture Pattern. If you are looking for an architecture pattern that is agile and highly performant, then you should opt for an event-driven architecture pattern.
   • Microkernel Architecture Pattern. This architecture pattern consists of two types of components – a core system and several plug-in modules. While the core system works on minimal functionality to keep the system operational, the plug-in modules are independent components with specialized processing.
   • Microservices Architecture Pattern. Microservices architecture pattern is seen as a viable alternative to monolithic applications and service-oriented architectures.

7. courses.ece.ubc.ca › 417 › publicArchitectural Patterns and Styles - Department of Electrical ...

   courses.ece.ubc.ca › 417 › public

   Software Architecture: Foundations, Theory, and Practice! Basic Properties of Styles A vocabulary of design elements Component and connector types; data elements e.g., pipes, filters, objects, servers A set of configuration rules Topological constraints that determine allowed compositions of elements

   • File Size: 6MB

   • Page Count: 80

8. www.redhat.com › 14-software-architecture-patterns14 software architecture design patterns to know | Enable ...

   www.redhat.com › 14-software-architecture-patterns

   • Cached

   Mar 16, 2022 · There are many different types of enterprise architect design patterns you can tap into. To help you decide what's right for your project, I've rounded up 14 previous articles about architectural design patterns and summarized them below.

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9. medium.com › bytebytego-system-design-alliance › theThe Architect’s Blueprint: Understanding Software Styles and ...

   medium.com › bytebytego-system-design-alliance › the

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   Jul 10, 2023 · 1. Layered Architecture Style. Layered architecture is one of the most common architectural patterns. It’s often used for traditional web applications and enterprise applications.

10. People also ask

    What are examples of software architecture patterns?

    • The success of the system depends on software architecture selection. Famous examples of architectural patterns are microservices, message bus, service requester/ consumer, MVC pattern, MVVM, microkernel, n-tier, domain-driven design components, and presentation-abstraction-control. What is the importance of software architecture pattern?

    10 Software Architecture Patterns You Must Know About - Simform

    www.simform.com/blog/software-architecture-patterns/

    See all results for this question

    What are the different types of architecture styles?

    • These styles include Layered, Component-Based, Service-Oriented, Distributed System, Domain-Driven, Event-Driven, Separation of Concern, Interpreter, Concurrency, and Data-Centric. By understanding these styles and patterns, you can better navigate the architectural landscape and design systems that are robust, scalable, and maintainable.

    The Architect’s Blueprint: Understanding Software Styles and ... - Medium

    medium.com/bytebytego-system-design-alliance/the-architects-blueprint-understanding-software-styles-and-patterns-with-cheatsheet-5c1f5fd55bbd

    See all results for this question

    What are examples of architectural patterns?

    • Examples include Model-View-Controller (MVC), Publish-Subscribe, and Serverless. While architectural styles provide a broad framework and can be seen as a general philosophy of a system’s design, architectural patterns are concrete solutions to specific design problems within this framework.

    The Architect’s Blueprint: Understanding Software Styles and ... - Medium

    medium.com/bytebytego-system-design-alliance/the-architects-blueprint-understanding-software-styles-and-patterns-with-cheatsheet-5c1f5fd55bbd

    See all results for this question

    What are architecture patterns?

    • The technical literature relating to this field is complicated by the fact that many people in the software field use the term "architecture" to refer to software, and many patterns described as "architecture patterns" are high-level software design patterns. This simply makes it all the more important to be precise in the use of terminology.

    The TOGAF Standard, Version 9.2 - Architecture Patterns - The Open Gr…

    pubs.opengroup.org/architecture/togaf9-doc/arch/chap22.html

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11. patterns.architexturez.net › system › filesThe patterns of architecture/T3xture

    patterns.architexturez.net › system › files

    Pattern. A pattern is a discovered organization of space, and also a coherent merging of geometry with human actions. In common usage “pattern” has an expansive definition. In Architecture “pattern” often equates with “solution”. In any discussion of architectural pattern theory the word “pattern” itself is used repeatedly ...