Estos son los temas que pregunto
CAMBIAR PREGUNTAS Y RESPUESTAS A INGLES
Gracias a Mel y a Walter por sus aportaciones, responder preguntas, complementar, sugerencias para la pagina y corregir typos
NOTA: No saber algo LVL 1 es mas malo que no saber algo de LVL 5, esto es muy a criterio.
Ejemplo fallar 1/10 preguntas de LVL 1 de OOP no es malo, Fallar 9/10 ya responder solo de LVL 5 puede interpretarse como que solo se busco términos rapidos sin fundamentos.
NOTA: Agrego una columna para ingles, Mi intención es ayudar a la gente que aun no domina el ingles. Por otra parte creo que también ayudaría ver la diferencia de explicar un tópico en español e ingles.
Las preguntas estan en ingles porque lo normal es entrevistar en ingles en alguna actualizacion cambiare eso a español e ingles.
OOP
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
| 2 | HE | Pilares de la POO | Pillar of OOP | Herencia, Polimorfismo, Encapsulacion, Abstraccion. | Inheritance, Polymorphism Encapsulation, Abstraction |
| 1 | HE | Herencia | Inheritance | Ability to crate new abstractions based on existing abstractions (classes) by deriving the existing behaviour we can re-use, extend or modify the base class. | |
| 3 | HE | Polimorfismo | Polymorphism | Is the property in a programming language that allows objects of different types to be substituted for one another in program flow without needing to know ahead of time what the object’s type. | |
| 1 | HE | Encapsulacion | Encapsulation | Protective encasement that permits access to an object’s data only via specifically assigned operations. | |
| 2 | HE | Abstraccion | Abstraction | Showing only the essential attributes of something and hiding any implementation finromation that is unncessary to the user | |
| 1 | E | Ejemplo de Herencia | Examples of Injeritance | A subclass extending a superclass | |
| 1 | HE | Ejemplo de Polimorfismo | Examples of Polymorphism | Override y overloding son parte del polimorfismo, upcasting y downcasting también | |
| 1 | E | Ejemplo de Encapsularon | Examples of Encapsulation | private fields, props (getter and setters), encapsulate what varies principle | |
| 1 | E | Ejemplo de Abstracción | Examples of Abstraction | Create private methods to hide implementation details, abstract out functions and methods that are common across multiple instances and create a single generalized concept | |
| 2 | H | Abstract vs interface | Abstract vs interface | Abstract is used for the inherit chain, Interface defines a contract that must be implemented, abstract classes can have base implementation, interfaces usually only have props and methods definition (C# 8.0 allows interface default methods implementations) | |
| 3 | HLUE | Modificadores de acceso | Access modifiers | public: type or member can be accessed from anywhere private: type or member can be only accessed within the same class protected: type or member can be accessed within the same class or a deriving class internal: type or member can be accessed anywhere in the declaring assembly private protected: can be accessed only in the declaring assembly by code in the same class or a derived one protected internal: can be accessed only in declaring assembly, or by a deriving class in another assembly. |
|
| 1 | E | herencia multiple | Multi inheritance | C# does not allow mutiple inheritance through classes, we must implement multiple interfaces, see deadly diamond of death problem | |
| 2 | HUE | sobre-escritura | override | Declare a virtual method in a base class, then use override modifier in child class method, that way we modifiy the existing behavior (polymorphism) | |
| 2 | HUE | sobrecarga | overloading | Declare several methods with almost same signature except for parameters number or type | |
| 2 | HE | protect/private vs internal | protect/private vs internal | ver modificadores de acceso | |
| 3 | E | struct | struct | Value type akin to a class where you can encapsulate data and related functionality | |
| 2 | HE | Reference Type | Reference Type | - Donde se guardan los objetos - Referencia de memoria - Se almacena en el heap |
|
| 2 | HE | Value Type | Value Type | - Se libera automaticamente - vive en el Stack |
|
| 3 | E | Managed and Unmanaged Code | Managed and Unmanaged Code | Managed: compiler - unmanaged: os | |
| 3 | E | Memory | Memory | Heap & Stack, los dos se almacenan en la memoria RAM, son un concepto lógico. | |
| 3 | E | Memory: Heap | Memory: Heap | - Se libera manual: Se aloja con el new y se libera con el delete. - Es mas lento Memoria en la que residen los objetos. Tipo por referencia |
It is the memory in which objects reside. Reference Types |
| 3 | E | Memory: Stack | Memory: Stack | - Se libera automáticamente. - Es mas rapida - Se utiliza para almacenar valores, no punteros. Stack es un bloque de memoria para almacenar variables locales y parametros. Memoria de la computadora, Memoria Temporal |
Stack is a block of memory for storing local variables and parameters. Computer’s Memory, Temprary Storage Memory |
| 3 | E | Static class | Static class | Signature modifier that indicates all members should be static, that is, you don’t need to create an instance of the class to reference that member | |
| 2 | E | Donde se guarda el tipo Valor | Where the Value Type is stored | Se guardan en el stack | |
| 2 | E | Donde se guarda el tipo de Ref | Where the Ref Type is stored | SE guardan en el Heap | |
| 5 | E | Boxing | Boxing | Boxing es el acto de hacer cas a un value type aun reference type, puede reference type puede ser un objecto clase o una interfaz. Ejemplo C#: int = 123; object o = i; \\ boxing |
|
| 5 | E | Unboxing | Unboxing | 0 = 123; i = (int)o; \\ unboxing |
|
| ? | E | Clase abstracta | Abstract Class | Son placeholder para la implementación de clases reales no pueden ser instanciadas. |
|
| ? | E | Diferencia clase abstracta y una clase | Abstract Class vs Normal | Las clases regulares todos los métodos están completamente implementados, una clase abstracta sus funciones no estan definidas (son abstractas). | |
| 2 | L | Constructor Clases abstractas | Abstract class constructor | ||
| 3 | Upcasting (polymorphsim) | Upcasting | Utillizar una subclase en un metodo o statement que espera su super clase o interfaz: Supongamos que Dog: Animal, entonces es posible: Animal huesos = new Dog();y tambien: Dog huesos = new Dog(); trainer.FeedAnimal(huesos) //Si espera un objeto tipo Animal |
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| 3 | Downcasting (polymorphism) | Downcasting | Utilizar una referencia upcasteada previamente y regresarla a su tipo original *Operacion costosa en tiempo de ejecucion, ejemplo: void FeedAnimal(Animal animal){ if(animal is Dog){ Dog dog = animal as Dog; } |
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| 5 | Covariance and contravariance | Covariance and contravariance | Enable implicit reference conversion for array types, delegate types, and generic tpye arguments:Ienumerable<string> strings = new List<string>();Ienumerable<object> objects = strings;Contravariance: Action<object> actObject = SetObject;Action<string> actString = actObject; |
.Net (C#)
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
| 5 | HL | CLR | CLR | Common Language Runtime: Improves runtime interactivity between programs, portability, security, cross-language integration | |
| 5 | L | MSIL/CIL | MSIL/CIL | Microsoft Intermediate Language / Common Intermediate Language | |
| 5 | L | CLI | .Net Framework/.Net Core | Common Language Infrastructure | |
| 3 | HLU | .Net Framework/.Net Core | .Net Framework/.Net Core | ||
| 3 | HLE | Thread & Task | Thread & Task | ||
| 5 | E | Programación Asíncrona | Programación Asíncrona | async, await, task | async, await, task |
| 2 | HLE | Delegate | Delegate | action & func | |
| E | Tipo de Delegados | Tipo de Delegados | Tipo (Type) e Instancia (instance) | ||
| 4 | E | Delegado de tipo (delegate Type) | Delegado de tipo (delegate Type) | Un delegate type define un protocolo el cual el que lo llama y el objetivo van a confirmar, comprometiendo una lista de tipo de parámetros y un tipo de retorno | |
| 4 | E | Delegado de instancia (delegate instance) | Delegado de instancia (delegate instance) | Un delegate instance es un tipo de objeto que se referencia a uno o mas métodos objetivos conformando un protocolo. | |
| 3 | E | Action (delegate) | Action (delegate) | functions that do not return a value | |
| 2 | E | Func (delegate) | Func (delegate) | ||
| 4 | Predicate | Predicate | |||
| 3 | E | Extension method | Extension method | ||
| 3 | E | Linq | Linq | ||
| 3 | E | Lamba Expression | Lamba Expression | ||
| 4 | Dispose Finalize (IDisposable) | Dispose Finalize (IDisposable) | |||
| 4 | GC | GC | |||
| 5 | Generations | Generations | |||
| 3 | Generics | Generics | |||
| 4 | Tuples | Tuples | Provide a simple way to store a set of values. The main purpose of tuples is to safely return multiple values from a method without resorting to out parameters (something you cannot do with anonymous types) | ||
| 4 | Unsafe code | Unsafe code | Permitted to use pointer types and perform C++ style pointer operations on memory within that scope | ||
| ? | GC memory work | GC memory work | |||
| ? | E | Caules IoC utilizas | Caules IoC utilizas | ||
| ? | UE | Tipos de LifeTime en .Net Core IoC | Tipos de LifeTime en .Net Core IoC | AddSingleton, Transaction, AddScope | AddSingleton, Transaction, AddScope |
| ? | E | Generic con contrains | Generic con contrains | ||
| ? | E | Reflection | Reflection | ||
| 3 | LUES | Usos de reflection | Example of usage of Reflection | ||
| ? | E | Modificador de acceso por default | Modificador de acceso por default | ||
| ? | LE | Librerias de IoC | Librerias de IoC | ||
| 2 | S | Data Types | Data Types | int, long, double, decimal, float, char, string, bool, byte, object, sbyte, short, uint, ulong, ushort | |
| 2 | S | Data Structure | Data Structure | Collecciones son el estandar que complementan los arrays, fuera de las arreglos, no cuenta con estructura de datos como otros lenguages que tienen tipo de estructuras de key-value. C# include un tipo comun de estructura que ayude a crear colecciones (System.Collection) | |
| 1 | S | Flow Control | Flow Control | if-else-, while, do-while, switch, for, foreach |
.NET Core
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
| 4 | L | Kestrel | Kestrel | ||
| 3 | ULE | Startup | Startup | ||
| 1 | L | Como se configura (diferencia con .Net framework) | How to configure (and diff with .Net framework | Principla: Multiplataforma |
.NET Framework
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
Es demasiado
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
| +5 | Integer literals | Integer literals | decimal, hexadecimal, binary | decimal, hexadecimal, binary |
Data Types
| Tipos | Tamaño | Descripción |
|---|---|---|
| int | 4 bytes | almacena numeros de -2,147,483,648 a 2,147,483,647 |
| long | 8 bytes | |
| float | 4 bytes | internal representation base 2 |
| double | 8 bytes | internal representation base 2 |
| decimal | internal representation base 10 lo que lo hace muy preciso | |
| bool | 1 bit | |
| char | 2 bytes | |
| string | 2 bytes por char |
ASP.NET MVC
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
| x | H | Workflow | Workflow | ||
| X | H | Security | Security | ||
| X | H | Filters | Filters | ||
| X | H | Filters - Order | Filters - Order | ||
| X | H | Filters - Types | Filters - Types | ||
| X | H | Multiple Models | Multiple Models | ||
| X | H | Route (Core and Framework) | Route (Core and Framework) | ||
| X | H | HttpVerbs | HttpVerbs | ||
| X | H | RestAPI | RestAPI | ||
| X | H | Assign Model | Assign Model | ||
| X | H | Partial view | artial view | ||
| X | H | ViewBag ViewData TempData | ViewBag ViewData TempData |
SOLID
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
| X | HL | Single responsibility Principle | Single responsibility Principle | Gather toghter the things that change for the same reasons, Separete things that Change for different reason Tambien se puede decir que un object tiene una sola razon para cambiar |
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| X | HL | Open–Closed Principle | Open–Closed Principle | A Module should be open for extension but closed for modification | |
| 5 | HL | Liskov Substitution Principle | Liskov Substitution Principle | A program that uses an interface must no be confused by an implmentation of that interface Objectos de un programa deberian ser reemplazabes por instances de sus subtipos sin alterar el correcto funcionamiento del programa |
|
| 5 | HL | Interface Segregation Principle | Interface Segregation Principle | Keep interfaces small so that users don’t end up depending on things they don’t need Muchas interfaces cliente espeficicas son mejores que una interfaz de propósito general |
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| X | HL | Dependency Inversion Principle | Dependency Inversion Principle | Depend in the direction of abstraction. High level modules should not depend upon low level details La noción de que se debe “depender de abstracciones, no depender de implementaciones”. |
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| 3 | E | Caules OOP aplican a S | Which OOP can apply to S | No decir que solo tiene una responsabilidad se puede explicar mejor diciendo que solo tiene una razon para cambiar |
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| 4 | E | Caules OOP aplican a O | Which OOP can apply to O | Creo que con el Polimorfismo | |
| 4 | E | Caules OOP aplican a L | Which OOP can apply to L | ||
| 4 | E | Caules OOP aplican a I | Which OOP can apply to I | ||
| 4 | E | Caules OOP aplican a D | Which OOP can apply to D | ||
| 4 | L | Explica para que es el SOLID - no las nombres | Explain SOLID benefit, no conceps and name | ||
| 3 | L | Diferencia con Patrones de Diseño | Difference with Design Patters |
Design Patterns
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
| X | HLE | IoC | IoC | ||
| X | HULE | IoC Tipos de Scope | IoC typo of scopes | Depende del lenguage. Ver en la parte del lenguage/Framework | |
| X | HULE | IoC Liberias | IoC Libraries | Depende del lenguage. Ver en la parte del lenguage/Framework | |
| X | HL | Singleton | Singleton | ||
| X | HL | Dependency Injection | ependency Injection | ||
| X | HL | Factory | Factory | ||
| X | HL | Observable | Observable | ||
| X | HL | Creational patterns | Creational patterns | These patterns are designed for class instantiation. They can be either class-creation patterns or object-creational patterns | |
| X | HL | Structural patterns | Structural patterns | These patterns are designed with regard to a class’ structure and composition. The main goal of most of these patterns is to increase the functionality of the class(es) involved, without changin much of its composition | |
| X | HL | Behavioral patterns | Behavioral patterns | These patterns are designed depending on how one class communicates with others |
| Creational | Structural | Behavioural | |
|---|---|---|---|
| Comunes | - Abstract Factory - Builder - Factory Method - Prototype - Singleton |
- Adapter (Wrapper or Translator) - Bridge - Composite - Decorator - Facade - Flyweight - Proxy |
- Chain of reponsability - Command - Interpreter - Iterator - Mediator - Memento - Observer (Publish/subscribe) - State - Strategy - Template method - Visitor |
| Menos comunes | - Lazy initialization - Dependency Injection - Multiton - Object pool - Resource acquisition is initialization |
- Extension Object - Front controller - Marker - Module - Twin |
- Blackboard - Null object - Servant - Specification |
Javascript
Las ligas llevan a paginas externas, en un futuro planea que llevan a secciones del blog.
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
| ? | H | JS vs JQ (Legacy ya no es muy necesaria) | JS vs JQ (legacy) | ||
| ? | H | === | === | ||
| 2 | HS | Tipos de datos | Data Types | Number, String, Boolean, undefined, bigInit, Symbol, null, object | |
| 2 | HS | Tipos de Estructura | Structure Types | object, Function | |
| ? | Strcutural Root (Pagina de MDN) | Strcutural Root (Pagina de MDN) | null - La agregue porque esta en la pagina de moz como tipo objeto | ||
| 3 | Ejemplo de Objects | Object Examples | Object, Array, Map, Set, WeakMap, WeaSet, Date. Todo lo que va despues de new | ||
| 3 | S | Flow Control | Flow Control | While, Do-While, For, If-else, Switch | |
| 3 | hasOwnProperty | hasOwnProperty | |||
| ? | H | typeof | typeof | ||
| ? | H | Json Array | Json Array | ||
| ? | HL | Let Var Const | Let Var Const | ||
| ? | HL | Prototype | Prototype | ||
| ? | HL | Closure | Closure | ||
| ? | H | Hoisting | Hoisting | ||
| ? | HU | Scope | Scope | ||
| 5 | S | Programacion Asíncrona | Async Programing | Promises, async/await | |
| ? | H | Promises and callback | Promises and Callback | ||
| ? | H | Promise vs Observable | Promise vs Observable | ||
| ? | H | Multithreading | Multithreading | ||
| ? | What is the Fetch method? | What is the Fetch method? | |||
| ? | U | LocalStorage vs SessionStorage | LocalStorage vs SessionStorage | ||
| ? | H | window vs document | window vs document |
Angular
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
| 5 | Components | Components | |||
| 5 | U | Directives | Directives | ||
| 5 | U | Attribute Directives | Attribute Directives | ||
| 5 | Structural Directives | Structural Directives | |||
| 5 | U | Pipes | Pipes | ||
| 5 | Services | Services | |||
| 5 | Routing | Routing | |||
| 5 | NgModule | NgModule | |||
| 5 | U | Angular Template | Angular Template | ||
| 5 | U | Modules | Modules |
ReactJS
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
| ? | S | Ciclo de vida | lifecycle | ||
| ? | S | hooks | hooks |
TypeScript
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
| X | Decoradores | Decorators | |||
| X | Fuertemente tipado | Strongly-Type |
Azure
IaaS----------\
| PaaS-----\ |
| | | |
| | SaaS | |
| |________| |
|______________|
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
| 3 | L | PaaS | PaaS | Una plataforma compartida para los desarrolladores donde puede espedar su software. Es una capa abstracta de la infrastructura, asi los desarrolladores no necesitan preocuparse por la configuracion del servidor | |
| 3 | L | IaaS | IaaS | Una infrastructura de hardware compartida donde el administador puede contruir infrastructuras de servicios, es decir, tiene mas control del sistema que el PaaS | |
| 1 | Ejemplos de SaaS | Examples of SaaS | Wordpress | ||
| 1 | Ejemplo de PaaS | Examples of PaaS | Azure Web Apps | ||
| 2 | Ejemplo de IaaS | Examples of IaaS | Azure VMs |
UNIT TEST
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
| Librerias | Libraries | ||||
| Mock | Mock |
Unit Test - C#
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
| XUnit Theory | XUnit Theory | ||||
| XUnit Fact | XUnit Fact |
Unit Test - Javascript
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
Base de Datos
SQL
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
CosmosDB
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
Entity Framework
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
Arquitectura
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
| L | Arquitectura Onion | Onion Architecture |
AGILE Methodology
Html
Boostrap
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
| 1 | Cuantas columnas son | How many columns use | 12 |
Cloud
RabbitMQ
Identity Server
| LVL | Lugar | Pregunta | Question | Indicio/Respuesta | Hint/Answer |
|---|---|---|---|---|---|
| 1 | Client | Client | A Client is a piece of software that requests tokens from IdentityServer - either for authenticationg a user or for accessing a resource | ||
| ? | API Resource | API Resource | APIs reousrces represent functionality a client want to invoke - typically modelled as Web APIs. | ||
| Identity Resource | Identity Resource | Identity information (aka claims) about a user, e.g. name of email address. | |||
| ? | Identity Token | Identity Token | An identity token represents the outcome of an authentication process. | ||
| ? | Access Token | Acess Token | An access token allows access to an API Resource. | ||
| ? | API Scope? | ||||
| ? | Scopes? | ||||
| ? | Identity Scope | ||||
| ? | Resource Scope |