쉐도잉 연습: Explain IEnumerable in C# ( C# Interview Questions) - 영상으로 영어 말하기 배우기

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Welcome to Questpods YouTube channel and what are we learning today.

Today we will be discussing a very very very very simple C sharp interview question.

What is I Enumerable?

Why do we need I Enumerable?

What is the importance of it and so on.

Now this question is a very simple question

but it is very surprising that many developers either don't know the answer

or many of them who answer the question they just answer 50% part of it

and remember that questions around collections or simple questions fundamental questions like array list and iEnumerable and iQueryable,

iEnumerator, yield keyword these are some of the questions that

if you are not able to answer it sends a very wrong signal in the interview.

Let us try to answer this question

when this question comes up many developers would write away answers saying

that the goal of IEnumerable is to enable iterations or in other words to enable this fantastic foreach loop over a collection.

If you have an array list or if you have a list

and if you want to do a foreach loop over it then IEnumerable is needed or IEnumerable helps you to do that.

Now this answer is 50% right and if you are lucky and the interviewer does not cross question you you are good.

But let us say the interviewer cross questions you let us say

that if it is a bad day and the interviewer cross questions

and says

that well without the knowledge of IEnumerable you can see the

screen you can see the code on the screen without the

knowledge of IEnumerable we are still able to iterate over an ArrayList

or a List or a collection or a dictionary or anything.

When we are able to do

that why do we have to explicitly know about IANU variable

because you can always do a for each loop over ArrayList or a List you don't have to specifically do something.

Now you are stuck with this googly and

that is why always say a little bit of advertisement that is why always say that please go prepared for interviews.

Remember when you say that you want to crack an interview one is that you should know the technology.

For example let us say you want to go

and crack C sharp so you should know C sharp step by step you should do a project,

you should do MVC project but at the same time you should also do interview questions.

You should go through the basic concepts.

On questpond.com we have both the things you can learn step

by step as well as you can go through the interview questions.

You can learn MSB as step by step and you can have the interview question.

You can learn Angular step by step and then you will have somewhere an Angular interview question.

In same way you can learn ASP.NET MVC at the same time you will have interview questions.

We have this step by step and interview question both of them together and please this week also I am having

the weekend training on architecture so please attend my architecture training.

It's going on for I think now this would be the 10th

or the 11th session all the recordings are uploaded please go ahead

and join this training as well as exciting offline on Saturday

and Sunday in Mumbai we are having the learn angular training

so in case if you are interested you can join the same as well.

Let us go back to the topic that's why I always say go prepared

when you get such kind of cross questions it is something it's not

that you don't know the answer it is just that you have to be prepared.

The complete answer must be the complete answer is IEnumerable helps

to iterate without knowing the actual type of collection you have at the back.

It acts like an abstraction.

Let us try to understand it with an example remember that

when you say you are preparing for interviews it does not mean

that you have to mug up you have to understand the concept you have to know how to answer those cross questions.

We can see that here we have this simple get function out here

and this get function depending on situation

if it is Monday it is giving out an array list if it is not Monday it is giving out a list.

This get function is giving out different type of collections.

Now let us say you want to go and iterate over it.

If you want to do a for each over it then what you do you expose out an i enumerable.

You say just expose out an i enumerable that is it

and now you can go and you can do a for each loop over the get function easily.

So you can say for each over the get.

So you can see now this for each loop out here does not know

that he will get an array list or he will get a list.

That is what the use of IEnumerable is it is an abstraction.

Also this IEnumerable becomes very useful for example

if you want to pass a generic collection let us say if you have a method here called a sort.

In this sort you want to pass a collection but you want it to be generic.

This sort function actually can take any kind of collection it It can be a list,

it can be a dictionary and he can do the sort.

What you can do is you can again pass just IEnumerable.

And then the sort can go and sort take this IEnumerable collection

and he can say if it is a list then he will sort in a different way

if it is a dictionary it will sort in a different way and so on.

Now the client can call the sort function and he can pass in an ArrayList.

No problem in this.

can also go and pass in probably a list,

he can pass in a dictionary.

The sort function says that you just pass me IEnumerable.

I don't want to get into details of the data types

that it is a dictionary or it is a generic list or it is a list,

it is an array list.

I will just sort it out.

Must be the complete answer when this question comes up in C sharp interviews is

that that IEnumerable acts like an abstraction it acts like an abstraction

and it hides that what kind of collection exists at the back.

Must be the complete answer is IEnumerable helps to iterate without knowing the actual type of collection at the back

it acts like an abstraction.

Now

when this question comes up IEnumerable there are 80 to 90

percent chance the interviewer can ask you a question saying that what is the difference between iEnumerable and iEnumerator.

What is the difference between iEnumerable,

iQueryable, iEnumerator, yield keyword and so on.

Must be you can go prepared for these kind of situations.

Remember that a prepared developer has more chance of getting a job than an unprepared superhero.

You can be a super hero in your project but

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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이 수업에 대하여

이번 강의에서는 C# 인터뷰 질문 중 하나인 IEnumerable에 대해 배우게 됩니다. 많은 개발자들이 이 개념의 중요성을 간과하는 경우가 많기 때문에, 이 수업을 통해 IEnumerable의 진정한 의미와 필요성을 이해하고 실제 인터뷰에서 유리한 점으로 활용할 수 있게 될 것입니다. 영어 회화 연습을 통해 이 내용을 말하는 능력을 높이면서, 영어 쉐도잉을 활용하여 발음과 억양도 교정해 보세요.

주요 어휘 및 표현

IEnumerable: 컬렉션을 반복(iterate)할 수 있게 해주는 인터페이스.
foreach loop: 각 요소를 순회하는 반복문.
ArrayList: 요소의 집합을 저장하는 클래스.
cross questions: 추가 질문.
technology: 기술.
project: 프로젝트.
interview questions: 면접 질문.

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문형	영상 속 표현
조건문 if + 절, will/would + 동사 — 조건과 그 결과	if it is a dictionary it will sort
수동태 be + 과거분사 — 누가 하는지보다 무슨 일이 일어나는지에 초점	is needed · are uploaded · are specifically meant

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