Wissen Technology DOT NET Developer Interview Questions and Answers

Q1. Explain exceptional handling
Ans. 
Exception handling is a mechanism to handle runtime errors in a program.
• Exception handling helps in gracefully handling unexpected errors in a program.

• It prevents the program from crashing and allows for proper error logging and recovery.

• Commonly used keywords in exception handling are try, catch, finally, and throw.

• Example: try { // code that may throw an exception } catch(Exception ex) { // handle the exception }
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Q2. Explain difference between abstract and interfaces
Ans. 
Abstract classes can have implementation details while interfaces cannot.
• Abstract classes can have both abstract and non-abstract methods, while interfaces can only have abstract methods.

• A class can only inherit from one abstract class, but can implement multiple interfaces.

• Abstract classes can have constructors, fields, and properties, while interfaces cannot.

• Abstract classes are used when some common functionality ne...read more
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Q3. One coding question on arrays
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Q1. Oop questions they will ask
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Q2. C# basic string var dymaic out ref
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Q3. Sql , dot net
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Q1. This round they will ask strategic question
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Q2. How you will handle the team , deadlines
Ans. 
I will handle the team by setting clear expectations, delegating tasks effectively, monitoring progress, and providing support as needed.
• Set clear goals and deadlines for the team to ensure everyone is on the same page

• Delegate tasks based on team members' strengths and workload

• Regularly check in with team members to monitor progress and offer assistance if needed

• Adjust deadlines or redistribute tasks as necessary to me...read more
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Online zoom coding test will be there - 4 questions - 2 about output of code & 2 about technical questions.

Q1. Polymorphism and explain about virtual polymorphism
Ans. 
Polymorphism is the ability of a single function or method to operate on different types of data.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• Virtual polymorphism is achieved through virtual functions in C++.

• Virtual functions allow a function in a base class to be overridden in a derived class.

• Example: Animal class with virtual function 'makeSound' overridden in Dog a
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Q2. Write code for virtual polymorphism and explain
Ans. 
Virtual polymorphism allows objects of different classes to be treated as objects of a common superclass.
• Create a base class with virtual functions

• Create derived classes that override the virtual functions

• Use pointers or references of the base class to call the overridden functions
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Q1. About yourself should explain
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Q2. Reason for job change
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Q3. Salary negotiations and location
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Coding round is related to DSA

Q1. Java related questions
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Q2. Explain about your project
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Q1. Salary negotiation
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Q2. Why you want to join us?
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Technology advantage or not

All aptitude topics,logical reasoning

Q1. Oops,2 coding questions
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Q2. Palindrome,even number
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Q1. What do you know
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Q2. Do you have any questions
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Q1. REST API for User CRUD
Ans. 
Design a RESTful API for CRUD operations on user resources.
• Use HTTP methods like GET, POST, PUT, DELETE for CRUD operations

• Create endpoints like /users for listing all users, /users/{id} for specific user

• Use status codes like 200 for success, 404 for not found, 400 for bad request

• Implement authentication and authorization mechanisms for security

• Include request and response body formats like JSON or XML
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Q2. Two Sum Leetcode problem
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Q3. Basic questions based on the candidate technical skills
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Q1. Basics to Intermediate level of questions based on the skills mentioned in the resume
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Q2. Projects related discussions
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Q1. I was informed to upload the supporting documents. ( They rejected me after this eventhough all my documents are genuine )
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There were 3 coding questions of moderate difficulty.

Q1. Code transpose of matrix
Ans. 
Transpose a matrix by swapping rows with columns
• Iterate through each row and column and swap the elements

• Create a new matrix with swapped rows and columns

• Ensure the new matrix has the correct dimensions
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Q2. Implement swap method.
Ans. 
Implement a swap method for two variables.
• Create a temporary variable to store the value of one variable.

• Assign the value of the second variable to the first variable.

• Assign the value of the temporary variable to the second variable.
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Q1. Depth of a binary tree
Ans. 
The depth of a binary tree is the number of edges on the longest path from the root node to a leaf node.
• Depth of a binary tree can be calculated recursively by finding the maximum depth of the left and right subtrees and adding 1.

• The depth of a binary tree with only one node (the root) is 0.

• Example: For a binary tree with root node A, left child B, and right child C, the depth would be 1.
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Q2. Middle of linked list.
Ans. 
To find the middle element of a linked list, use two pointers - one moving at double the speed of the other.
• Use two pointers - slow and fast, with fast moving at double the speed of slow.

• When fast reaches the end of the list, slow will be at the middle element.
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Q3. Design book my show
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Q1. Why do you want to join hashedin.
Ans. 
I want to join Hashedin because of its reputation for innovative projects and collaborative work environment.
• Reputation for innovative projects

• Collaborative work environment

• Opportunities for growth and learning
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Q2. Challenges faced in my previous internship.
Ans. 
Managing tight deadlines and learning new technologies were the main challenges faced in my previous internship.
• Meeting tight project deadlines

• Adapting to new technologies quickly

• Working in a fast-paced environment

• Collaborating with team members effectively
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