C# Delegates and Events | Theory vs Real interview answer — Transcript

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1. 0:01Good morning, good afternoon, good
2. 0:03evening from whichever location you are
3. 0:04watching this video. A very very warm
4. 0:06welcome to Quespon channel and in this
5. 0:09video we'll be discussing about what
6. 0:12happens in actual interviews when it
7. 0:14comes to delegates and events right and
8. 0:18the whole goal of creating this video is
9. 0:20that
10. 0:21to make you understand that when you
11. 0:23talk about interview preparation when
12. 0:25you talk about clearing interviews right
13. 0:27it is not just a technical thing
14. 0:29technical thing must be 70% but 30% it
15. 0:33is psychological 30% person it depends
16. 0:35on that what kind of answers you are
17. 0:37giving to the interviewer and what kind
18. 0:40of cross questions the interviewer asks
19. 0:42you right so what this is what this
20. 0:43video is all about and again before I
21. 0:46start this video if you go and if you
22. 0:47share this video on your LinkedIn you
23. 0:49will get this beautiful shear interview
24. 0:51question PDF right so go ahead share the
25. 0:54link and mail us at questpondqubond.com
26. 0:57and we will give you this beautiful book
27. 1:00out there so let us get started when
28. 1:02this question comes up in the interview
29. 1:04Many developers answer that delegate is
30. 1:08a pointer to a function. Now this answer
31. 1:11is actually technically very right but
32. 1:14it is very very academic. The next cross
33. 1:17question that the interviewer can hit
34. 1:19you is with that why do I have to call
35. 1:22the method through a pointer? Why do I
36. 1:24have to invoke the method through a
37. 1:25pointer? I can invoke it directly and
38. 1:28this way what will happen is the
39. 1:29interviewer will will go in a different
40. 1:30tangent altogether. So it is better to
41. 1:33answer some practical implementation out
42. 1:36here right that's what impresses the
43. 1:38interviewer if you're going to go around
44. 1:40with your academic answers right the
45. 1:42interviewer will never connect with you
46. 1:44so for example if you say here delegate
47. 1:46is a call back so for example you have a
48. 1:48caller and you have a colleague and let
49. 1:50us say that the caller and the colleague
50. 1:52are in a different process in a
51. 1:54different thread um you know and they
52. 1:57want to have communication between them
53. 1:59then must be it makes sense Right? So
54. 2:03when you start with the right answer,
55. 2:05when you start with a practical answer,
56. 2:07the interviewer starts connecting with
57. 2:09you. So answering academic answers,
58. 2:12right, just makes the interview very
59. 2:15mundane. Uh another kind of answer which
60. 2:17comes around delegates is that delegates
61. 2:20are like abstraction. Now remember when
62. 2:23it comes to abstraction, right,
63. 2:24interfaces are gods of abstraction
64. 2:26frankly. So
65. 2:29when you actually put ahead this answer
66. 2:31saying that delegate is like abstract
67. 2:33over any kind of a method like for
68. 2:35example you have an method which is
69. 2:37operation it takes two number now inside
70. 2:40that it can do an addition or it can do
71. 2:42a multiplication or it can do something
72. 2:44like that. So when you say that delegate
73. 2:46is an abstraction over a method
74. 2:49signature, the interface can take you
75. 2:51into a different loop and ask you that
76. 2:53then what what is so bad in interfaces
77. 2:56because the whole goal of interfaces is
78. 2:58abstraction, abstraction and
79. 3:00abstraction. So again this answer is
80. 3:03technically right but it is not the main
81. 3:06thing. It is more of a byproduct. It is
82. 3:10a byproduct answer. Again when the
83. 3:12interviewer asks about saying that where
84. 3:14have you used delegates developers try
85. 3:17to create you know some kind of a
86. 3:19unnatural artificial forced answers like
87. 3:22I have used delegates here I have used
88. 3:24delegates there right but frankly ask
89. 3:26your heart and write down on the
90. 3:28comments below that many many of us
91. 3:30don't even use delegates definitely we
92. 3:32use different forms of delegates
93. 3:34probably we use events we use action we
94. 3:37use funk we use predicate we use lambda
95. 3:40expression
96. 3:41But directly delegates is a very rare
97. 3:44scenario right. [snorts] So when you are
98. 3:47also truthful and more natural right the
99. 3:50interviewer does connect to you. So when
100. 3:52you say that no like I have not used
101. 3:53delegates but yes when I double click on
102. 3:55a button I see a plus equal to which is
103. 3:57an event right. So try to answer again
104. 4:01you know answers which are more
105. 4:02practical in nature wherein you get more
106. 4:06connected with the interviewer rather
107. 4:08than trying to form up an unnatural and
108. 4:11an artificial answer and this whole
109. 4:13discussion of delegates goes into a
110. 4:15different tangent into a different loop
111. 4:17when the question of events come in and
112. 4:20when the question of events come in
113. 4:21right the the developers answer so
114. 4:24confidently so sophisticatedly right
115. 4:27saying that okay what is the Event event
116. 4:29is a encapsulation over delegates. Event
117. 4:32is a pure publisher subscriber
118. 4:35mechanism. Events actually help you to
119. 4:37implement a broadcasting kind of an
120. 4:39architecture. So remember all of these
121. 4:41answers are right. The only point is
122. 4:43that are you able to explain the
123. 4:45interviewer what exactly is a pure
124. 4:47publisher subscriber mechanism that is
125. 4:49important right? So yes, when you're
126. 4:52answering these sophisticated
127. 4:54when you're using these sophisticated
128. 4:56vocabulary, these sophisticated
129. 4:57technical vocabulary, make sure that you
130. 5:00are able to communicate with the
131. 5:02interviewer that what exactly are these
132. 5:05words and the interviewer can take you
133. 5:07for a ride. Specifically, if you look at
134. 5:09the multiccast delegate and event right,
135. 5:11they look very similar because in case
136. 5:13of multiccast delegate also you can do a
137. 5:15plus equal to and a minus equal to. You
138. 5:17can have a publisher subscriber
139. 5:19mechanism and in events also you can do
140. 5:21that right. So if you know the answer
141. 5:22write down on the comments down below
142. 5:24that what is the difference between a
143. 5:25multiccast delegate and a event remember
144. 5:28I'll just give you the answer the answer
145. 5:30is pure
146. 5:32pure publisher subscriber mechanism and
147. 5:35remember if ever those four rudra aars
148. 5:38of delegates that is funk lambda
149. 5:43action predicate if all of these come in
150. 5:46right then it becomes very very
151. 5:48different scene altogether you will see
152. 5:50a huge thunder dance all together.
153. 5:52Right? So remember that all of these
154. 5:54four things or even the five things
155. 5:56events, funk, lambda, action, predicate
156. 6:00are nothing but they are derived from
157. 6:03delegates. So that is very important to
158. 6:05remember. The whole point of this video
159. 6:06is that to make you realize that when
160. 6:09interviews are happening, right,
161. 6:11interviews should get converted into a
162. 6:13conversation. It should not be Q&A,
163. 6:16right? It should not be having more
164. 6:18academic answers. If you really want to
165. 6:21win the interviewer's heart, right? Your
166. 6:24answers should be practical. Your
167. 6:26answers should not lead to more cross
168. 6:28questions. For example, I talked about
169. 6:30delegate. If you say delegate is a
170. 6:31pointer to a function, then there is
171. 6:33another question and another question.
172. 6:34But when you say delegate is a call back
173. 6:36must be it just hits you know where it
174. 6:39wants to hit, right? So try to see that
175. 6:42in in the interview try to make an
176. 6:44interview as a conversation. So that
177. 6:46brings us to the end of this video. My
178. 6:48whole goal of this video was to give you
179. 6:50an essense of how interviews actually
180. 6:53happen and sometimes we don't even know
181. 6:56that the answers what you're giving out
182. 6:58there is it really impressing the
183. 7:01interviewer or is it really going in a
184. 7:03loop right so I hope that you got the
185. 7:04context of this video uh and thank you
186. 7:07very much and remember you can go to
187. 7:08quest.com you can look at our videos
188. 7:10what we have you can look at our live
189. 7:11trainings what are happening remember
190. 7:13one of the live trainings which I'm
191. 7:14coming around at this moment is
192. 7:16interview preparation course right so
193. 7:18must be you can have a look at that so
194. 7:19we have interview preparation course we
195. 7:21have the Azure course we have
196. 7:22microservices uh we have the IML course
197. 7:25for C# developers we have so many other
198. 7:28courses out there go ahead go to
199. 7:30queston.com and you can chat over there
200. 7:32thank you very much happy learning happy
201. 7:34job hunting