Shadowing Practice: Explain IEnumerable in C# ( C# Interview Questions) - Learn English Speaking with Video
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Welcome to Questpods YouTube channel and what are we learning today.
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Today we will be discussing a very very very very simple C sharp interview question.
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What is I Enumerable?
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Why do we need I Enumerable?
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What is the importance of it and so on.
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Now this question is a very simple question
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but it is very surprising that many developers either don't know the answer
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or many of them who answer the question they just answer 50% part of it
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and remember that questions around collections or simple questions fundamental questions like array list and iEnumerable and iQueryable,
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iEnumerator, yield keyword these are some of the questions that
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if you are not able to answer it sends a very wrong signal in the interview.
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Let us try to answer this question
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when this question comes up many developers would write away answers saying
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that the goal of IEnumerable is to enable iterations or in other words to enable this fantastic foreach loop over a collection.
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If you have an array list or if you have a list
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and if you want to do a foreach loop over it then IEnumerable is needed or IEnumerable helps you to do that.
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Now this answer is 50% right and if you are lucky and the interviewer does not cross question you you are good.
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But let us say the interviewer cross questions you let us say
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that if it is a bad day and the interviewer cross questions
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and says
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that well without the knowledge of IEnumerable you can see the
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screen you can see the code on the screen without the
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knowledge of IEnumerable we are still able to iterate over an ArrayList
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or a List or a collection or a dictionary or anything.
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When we are able to do
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that why do we have to explicitly know about IANU variable
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because you can always do a for each loop over ArrayList or a List you don't have to specifically do something.
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Now you are stuck with this googly and
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that is why always say a little bit of advertisement that is why always say that please go prepared for interviews.
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Remember when you say that you want to crack an interview one is that you should know the technology.
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For example let us say you want to go
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and crack C sharp so you should know C sharp step by step you should do a project,
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you should do MVC project but at the same time you should also do interview questions.
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You should go through the basic concepts.
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On questpond.com we have both the things you can learn step
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by step as well as you can go through the interview questions.
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You can learn MSB as step by step and you can have the interview question.
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You can learn Angular step by step and then you will have somewhere an Angular interview question.
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In same way you can learn ASP.NET MVC at the same time you will have interview questions.
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We have this step by step and interview question both of them together and please this week also I am having
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the weekend training on architecture so please attend my architecture training.
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It's going on for I think now this would be the 10th
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or the 11th session all the recordings are uploaded please go ahead
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and join this training as well as exciting offline on Saturday
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and Sunday in Mumbai we are having the learn angular training
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so in case if you are interested you can join the same as well.
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Let us go back to the topic that's why I always say go prepared
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when you get such kind of cross questions it is something it's not
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that you don't know the answer it is just that you have to be prepared.
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The complete answer must be the complete answer is IEnumerable helps
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to iterate without knowing the actual type of collection you have at the back.
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It acts like an abstraction.
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Let us try to understand it with an example remember that
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when you say you are preparing for interviews it does not mean
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that you have to mug up you have to understand the concept you have to know how to answer those cross questions.
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We can see that here we have this simple get function out here
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and this get function depending on situation
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if it is Monday it is giving out an array list if it is not Monday it is giving out a list.
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This get function is giving out different type of collections.
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Now let us say you want to go and iterate over it.
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If you want to do a for each over it then what you do you expose out an i enumerable.
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You say just expose out an i enumerable that is it
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and now you can go and you can do a for each loop over the get function easily.
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So you can say for each over the get.
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So you can see now this for each loop out here does not know
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that he will get an array list or he will get a list.
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That is what the use of IEnumerable is it is an abstraction.
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Also this IEnumerable becomes very useful for example
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if you want to pass a generic collection let us say if you have a method here called a sort.
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In this sort you want to pass a collection but you want it to be generic.
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This sort function actually can take any kind of collection it It can be a list,
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it can be a dictionary and he can do the sort.
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What you can do is you can again pass just IEnumerable.
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And then the sort can go and sort take this IEnumerable collection
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and he can say if it is a list then he will sort in a different way
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if it is a dictionary it will sort in a different way and so on.
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Now the client can call the sort function and he can pass in an ArrayList.
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No problem in this.
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can also go and pass in probably a list,
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he can pass in a dictionary.
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The sort function says that you just pass me IEnumerable.
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I don't want to get into details of the data types
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that it is a dictionary or it is a generic list or it is a list,
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it is an array list.
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I will just sort it out.
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Must be the complete answer when this question comes up in C sharp interviews is
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that that IEnumerable acts like an abstraction it acts like an abstraction
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and it hides that what kind of collection exists at the back.
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Must be the complete answer is IEnumerable helps to iterate without knowing the actual type of collection at the back
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it acts like an abstraction.
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Now
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when this question comes up IEnumerable there are 80 to 90
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percent chance the interviewer can ask you a question saying that what is the difference between iEnumerable and iEnumerator.
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What is the difference between iEnumerable,
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iQueryable, iEnumerator, yield keyword and so on.
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Must be you can go prepared for these kind of situations.
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Remember that a prepared developer has more chance of getting a job than an unprepared superhero.
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You can be a super hero in your project but
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when you get such kind of cross questions be prepared you are asking for a big salary so why not go prepared.
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Please go to my website questpond.com and we have lots of these courses
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which are specifically meant so that you clear interviews so that you get good knowledge.
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Before I end this video I want to ask a simple question out here
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and if you know the answer of this question below in the youtube comments please go ahead
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and put the answer which design pattern which design pattern does I enumerable or I enumerator implement.
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So which design pattern from Gango 4 does I enumerable and I enumerator implement.
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That brings us to the end of this session please hit the like subscribe
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and the bell icon so that
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when such videos are uploaded you are informed right away who knows you know
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that one of these questions you know can be a deciding factor in interviews so happy learning happy job hunting
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Vocabulario y notas de pronunciación para esta lección
Este vídeo tiene 109 frases y 1388 palabras para practicar shadowing. La parte hablada dura 8:19. El hablante habla a un ritmo natural de unas 167 palabras por minuto, cercano a una conversación cotidiana. El 86 % de las palabras está entre las 3.000 más comunes del inglés; conviene repasar el resto antes de empezar.
Vocabulario clave de este vídeo
15 palabras menos comunes del vídeo, con su pronunciación y significado:
- loop /luːp/ (sustantivo) — lazo, lazada. A length of thread, line or rope that is doubled over to make an opening.
- array /əˈɹeɪ/ (sustantivo) — atavío, galas. Clothing and ornamentation; raiment.
- dictionary /ˈdɪk.ʃəˌnɛ.ɹi/ (sustantivo) — diccionario, tumbaburros. A reference work listing words or names from one or more languages, usually ordered alphabetically, explaining each word's meanings or senses, oftentimes also…
- sharp /ʃɑɹp/ (adjetivo) — agudo, afilado. Terminating in a point or edge, especially one that can cut or pierce easily; not dull, obtuse, or rounded.
- interviewer /ˈɪntɚvjuɚ/ (sustantivo) — entrevistador, entrevistadora. One who interviews.
- developer /dɪˈvɛləpɚ/ (sustantivo) — desarrollador. A person or entity engaged in the creation or improvement of certain classes of products.
- generic /dʒɪˈnɛɹ.ɪk/ (adjetivo) — genérico. Very broad; pertaining or appropriate to large classes or groups as opposed to specific instances.
- angular /ˈæŋ.ɡjə.lɚ/ (adjetivo) — angular, anguloso. Relating or pertaining to an angle, or angles.
- architecture /ˈɑː.kɪˌtɛk.t͡ʃə/ (sustantivo) — arquitectura. The art and science of designing and managing the construction of buildings and other structures, particularly if they are well proportioned and decorated.
- crack /kɹæk/ (sustantivo) — grieta. A thin and usually jagged space opened in a previously solid material.
- enable /ɪˈneɪ.bəl/ (verbo) — habilitar, posibilitar. To make somebody able (to do, or to be, something); to give sufficient ability or power to do or to be; to give strength or ability to.
- implement /ˈɪmpləmənt/ (verbo) — implementar. To bring about; to put into practice; to carry out.
- yield /jiːld/ (verbo) — producir, dar. To give as a result or outcome; to produce or render.
- upload /ˈʌpˌloʊd/ (verbo) — subir, cargar. To transfer data to a computer on a network, especially to a server on the Internet.
- expose /ɪkˈspoʊz/ (verbo) — exponer, develar. To reveal; to uncover; to make visible; to bring to light.
Phrasal verbs que vas a escuchar
- come up (verbo) — salir a relucir. To emerge or become known, especially unexpectedly.
- go ahead /ˌɡoʊ əˈhɛd/ (verbo) — venga, adelante. To proceed with; to begin.
- go through (verbo) — atravesar. To travel from one end of something to the other.
- ask for (verbo) — pedir. To request; to order.
- get into (verbo) — entrar en, entrar a. To move into (an object), such that one ends up inside it.
Pronunciación a tener en cuenta
El hablante usa 4 contracciones y formas reducidas, como don't. Dilas en su forma corta, tal como las oyes.
- Los sonidos de “sh” y “zh”: dictionary /ˈdɪk.ʃəˌnɛ.ɹi/, sharp /ʃɑɹp/, collections /kəˈlɛkʃənz/, abstraction /æbˈstɹæk.ʃn̩/, iteration /ˌɪt.əˈɹeɪ.ʃən/
- Palabras largas — cuida el acento: dictionary /ˈdɪk.ʃəˌnɛ.ɹi/, developer /dɪˈvɛləpɚ/, architecture /ˈɑː.kɪˌtɛk.t͡ʃə/, fundamental /ˌfʌn.dəˈmɛn.təl/, superhero /ˈs(j)upɚhɪɹoʊ/
Cómo practicar con este vídeo
- Escucha el vídeo entero una vez sin hablar y anota las palabras que no conoces.
- Empieza a velocidad 0,75×, haz shadowing frase por frase y vuelve a la velocidad normal cuando te resulte fácil.
- Grábate y compara con el original, prestando atención a palabras como loop, array, dictionary.
Gramática en este vídeo
Las estructuras que más usa el hablante, con las palabras exactas del vídeo:
| Estructura | En el vídeo |
|---|---|
| Oraciones condicionales if + oración, will/would + verbo — una condición y su resultado | if it is a dictionary it will sort |
| Voz pasiva be + participio pasado — importa lo que ocurre, no quién lo hace | is needed · are stuck · are uploaded |
¿Qué es la Técnica de Shadowing?
Shadowing es una técnica de aprendizaje de idiomas respaldada por la ciencia, desarrollada originalmente para la formación de intérpretes profesionales y popularizada por el políglota Dr. Alexander Arguelles. El método es simple pero poderoso: escuchas audio en inglés nativo y lo repites en voz alta de inmediato, como una sombra que sigue al hablante con solo 1-2 segundos de retraso. A diferencia de la escucha pasiva o los ejercicios de gramática, el shadowing obliga a tu cerebro y músculos de la boca a procesar y reproducir simultáneamente patrones de habla reales. Las investigaciones muestran que mejora significativamente la precisión de la pronunciación, la entonación, el ritmo, el habla conectada, la comprensión auditiva y la fluidez al hablar, convirtiéndola en una de las metodologías más efectivas para la preparación del IELTS Speaking y la comunicación en inglés en el mundo real.