Ducont DOT NET Developer Interview Questions and Answers

Q1. What is normalization
Ans. 
Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity.
• Normalization helps in minimizing data redundancy by dividing the database into multiple tables.

• It ensures data integrity by avoiding update anomalies.

• Normalization is achieved through a series of rules called normal forms, such as 1NF, 2NF, 3NF, etc.

• Example: In a database, instead of storing customer details i...read more
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Q2. What is reflection
Ans. 
Reflection is the ability of a program to examine and modify its own structure and behavior at runtime.
• Allows accessing metadata of types and members at runtime

• Enables dynamic instantiation of objects

• Facilitates invoking methods dynamically
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Q1. -Self intro -Some simple topics to speak for 5 minutes till the satisfied with your english.
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Q2. Topics like your native, internet benefits and social media
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-Quantitative easy, intermediate
-Mathematical easy, intermediate
-Logical easy, intermediate
-programming questions too but it is easy like syntax correction and McQ in coding.

This was taken by two senior developers
30mins interview which the questions will be asked on your skill section.
-About Dotnet
-c#
-Oops principles
-HTML, CSS
-React Js basics
-SQL queries
But they asked only the basics so cover all the fundamentals before interview
Good luck guys!

Code Snept question with 3-4 Reasoning question. Google form

Pen paper coding round. String , Array . Linkedlist , graph, questions

Q1. Maximum Spaning
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Q2. Nearest Prime number
Ans. 
To find the nearest prime number, iterate from the given number in both directions until a prime number is found.
• Start iterating from the given number in both directions to find the nearest prime number.

• Check if a number is prime by dividing it by all numbers less than its square root.

• Keep track of the closest prime number found during the iteration.
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Q3. Second Maximum Number in Array
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Find the second maximum number in an array of strings.
• Convert the array of strings to an array of integers.

• Sort the array in descending order.

• Return the second element in the sorted array.
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Q1. Project Question
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Q2. Robot question of DSA
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Q3. Stock Buy and sell - VI . Leetcode Hard
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Q4. Leetcode Medium
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2 DSA question was asked

40 questions in 20 minutes

Q1. Stones games 2 leetcode
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Q2. Permutations of array
Ans. 
Generate all possible permutations of an array of strings
• Use recursion to generate permutations

• Swap elements to create different permutations

• Base case: when array size is 1, return array as permutation
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Q1. Project discussion
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30min Pseudo Code,Ratio and Proportion

1 hour Array,HashMap

Q1. Write a program a string is Anagram or not
Ans. 
Program to check if a string is an Anagram or not
• Create a function that takes in two strings as input

• Sort the characters in both strings and compare if they are equal

• Return true if they are anagrams, false otherwise
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Q2. How to connect mongodb with database
Ans. 
To connect MongoDB with a database, you need to use the MongoDB URI and a MongoDB client library.
• Use the MongoDB URI to specify the connection details such as host, port, username, password, and database name

• Install a MongoDB client library like Mongoose for Node.js or pymongo for Python

• Use the client library to establish a connection to the MongoDB database and perform CRUD operations
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Q3. What is event listener
Ans. 
An event listener is a function that waits for a specific event to occur and then triggers a response.
• Event listeners are commonly used in web development to handle user interactions like clicks, keypresses, etc.

• They are attached to specific elements and listen for events to occur on those elements.

• Once the event occurs, the listener executes a callback function to respond to the event.

• Example: Adding a click event lis...read more
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Q4. What is polymorphism
Ans. 
Polymorphism is the ability of a function or method to behave differently based on the object it is acting upon.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

• Example: Inheritance in object-oriented programming languages like Java allows for polymorphism.
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Q1. How to reverse a string without using extra space
Ans. 
Use two pointers to swap characters in place
• Initialize two pointers, one at the beginning of the string and one at the end

• Swap characters at the two pointers and move them towards each other until they meet or cross

• Repeat the process until the entire string is reversed
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Q2. Find a number that not present in array in O(N) time complexity array contain only 0 to n numbers
Ans. 
Use bitwise XOR operation to find the missing number in O(N) time complexity.
• Iterate through the array and XOR all the elements with their indices and the array length.

• The missing number will be the result of XORing all the elements with their indices and the array length.
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Q3. Why should you join this company
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Q4. How many interview have you give previously and why you get rejected
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60mintues DSA level coding exam

It basic about all the common aptitude

It had a coding test where there was 2 questions

Q1. Conducted in their office kochin
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Q2. Number of alphabets in a string
Ans. 
Count the number of alphabets in a given string.
• Iterate through each character in the string and check if it is an alphabet using ASCII values.

• Ignore spaces, numbers, and special characters while counting alphabets.

• Example: 'Hello World!' has 10 alphabets.
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