VVDN Technologies Senior .NET Developer Interview Questions and Answers

Q1. Difference between single & first in linq
Ans. 
Single returns the only element of a sequence, or a default value if the sequence is empty. First returns the first element of a sequence, or a default value if the sequence contains no elements.
• Single throws an exception if the sequence contains more than one element, while First does not.

• Single is useful when you expect only one element in the sequence, while First is used when you just need the first element.

• Example...read more
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Q2. Difference between ref & out keyword
Ans. 
ref is used for passing a variable by reference, out is used for returning a value from a method
• ref keyword is used to pass a variable by reference, allowing the method to modify the variable

• out keyword is used to return a value from a method, the variable passed must be assigned a value within the method

• ref parameters must be initialized before passing to the method, out parameters do not need to be initialized
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Q1. General Aptitude Questions
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Q2. 2 Coding Problems
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Q3. Domain related questions
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2 coding question (1st reverse a string without changing position of special character. 2nd remove elements before '#') + 20 mcqs

How to Improve software development process

Q1. Rearrange string
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Q2. Create form using react.js
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Q3. Longest prefix of strings in array
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Q1. Introduce your self
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Q2. Basic hr question
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Q1. The 1st round was JAM - Just a minute. They will give you a topic on the spot and we have to talk about this topic for 1-2min. Topics: The perfect prank you pulled, The best trip, Your pet's inner thoughts...read more
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The 2nd round is GD: The GD was conducted properly for other batches. But for our batch the HR just collected everyone's resume and asked qns from our resume.
(Note: This is not an elimination round)

The 3rd round was Aptitude and Technical mcq test: 10 qns - DBMS, 20 - Quants, 20 - Java mcq
(Note: This round has negative markings)

Q1. Resume based and about projects
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Q2. Basic sql queries Eg: SQL query to find the no of students in a department
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Q3. Reverse a string - Python
Ans. 
Reverse a string in Python using slicing
• Use string slicing with a step of -1 to reverse the string

• Example: 'hello'[::-1] will return 'olleh'
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Q1. The last round was general hr: Since there were two many candidates the process took too much time. There was no questions asked during the hr round, who ever has agreed to the 2yrs bond were recruited
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Q1. Basic questions on dotnet core
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Q2. Basic questions on angular
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MCQ asked for css,js etx

Q1. Ask for basic dot net questions
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Q1. Questions on Oops concepts
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Q2. Questions on design patterns
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