Clayfin Technologies Software Developer Interview Questions and Answers

Java, spring,springboot

Q1. Implement tail f
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Time distance and basic puzzle questions,6 questions in 45 minutes

Q1. Let,var,const difference,closure,react event loop
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Q1. Discussed high level design and modifications in my web application
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Q1. Explain basics of c#
Ans. 
C# is a programming language developed by Microsoft for building a wide range of applications on the .NET framework.
• C# is an object-oriented language with features like classes, inheritance, and polymorphism.

• It is strongly typed, meaning variables must be declared with a specific data type.

• C# supports modern programming concepts like async/await for asynchronous programming.

• It is commonly used for developing desktop, w...read more
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Q2. C# basics oops sql server
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Q1. Earlier work experiences
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Q2. Design Patterns
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Round duration - 120 minutes
Round difficulty - Hard

This round was very difficult. I never do these much difficulty level of coding questions. But i give my best, and just do every questions by using step by step process.

Q1. 
Hourglass Pattern Problem Statement
Given an integer 'N', print an hourglass pattern based on the value of 'N'.
Input:
The first and only line of input contains an integer, denoting the value of N.
Out...read more
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Q2. 
BFS Traversal in a Graph
Given an undirected and disconnected graph G(V, E) where V vertices are numbered from 0 to V-1, and E represents edges, your task is to output the BFS traversal starting from the ...read more
Ans. Using queue
Let us consider a function BFS that accepts a list of edges, EDGES, and the number of vertices VERTEX as a parameter and do: 
1. Create ADJACENCYMATRIX from EDGES.
2. Define a boolean array VISITED to store nodes that are already visited.
3. Iterate over VISITED[i] for each 0<= i < VISITED.LENGTH, and check:
   1. If VISITED[i] is FALSE, call BFSHELPER function for ADJACENCYMATRIX, i and VISITED.
Now, the function BF...read more
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Q3. 
Sort a Stack Problem Statement
You are given a stack. Your task is to sort the elements within the stack in ascending order using only push and pop operations. You are allowed to use one additional stack ...read more
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Round duration - 90 minutes
Round difficulty - Easy

This round is also coding round in this round we have a small video call interaction too, in which hr ask few questions to only those whose coding question is correct.

Q1. 
Next Smaller Palindrome Problem Statement
You are given a palindrome number represented as a string S. Your task is to find the largest palindrome number that is strictly less than S.
Example:
Input:
T...read more
Ans. Brute Force
• Given the fact that the input number is a palindrome itself makes this problem very trivial.
• Let us assume that the given string str is a palindrome, so we know that ‘S’ comprises of two halves  ‘S₁’ and ‘S₂’ i.e ‘S’ = ‘S₁' + ‘S₂', where ‘S₁' and ‘S₂’ are two strings, and ‘S₂’ is the reverse of ‘S₁’(in case of odd length palindromes ‘S₂’ won’t have the last character of ‘S₁’). So a change in any of the h...read more
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Q2. 
Rotting Oranges Problem Statement
You are given a grid containing oranges where each cell of the grid can contain one of the three integer values:
• 0 - representing an empty cell
• 1 - representing a fre...read more
Ans. Naïve Solution
The idea is very simple and naive. We will process the rotten oranges second by second. Each second, we rot all the fresh oranges that are adjacent to the already rotten oranges. The time by which there are no rotten oranges left to process will be our minimum time.
 
In the first traversal of the grid, we will process all the cells with value 2 (rotten oranges). We will also mark their adjacent cells ...read more
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