Peerbits Solution Software Developer Interview Questions and Answers

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. What is virtual dom
Ans. 
Virtual DOM is a concept in web development where a lightweight copy of the actual DOM is created and updated efficiently.
• Virtual DOM is used in frameworks like React to improve performance by minimizing direct manipulation of the actual DOM.

• It allows developers to update only the necessary parts of the UI, reducing the number of expensive DOM operations.

• Changes made to the virtual DOM are compared with the actual DOM,...read more
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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
You are given an integer N and you have to print the following pattern.
For N=5:
For N=6:

Input Format:
The first and only line of input contains an integer, that denotes the va...read more
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Q2. BFS in Graph
You are given an undirected and disconnected graph G(V, E) having V vertices numbered from 0 to V-1 and E edges. Your task is to print its BFS traversal starting from the 0th vertex.
BFS or ...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
Answered by CodingNinjas
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Q3. Sort a stack
Given a stack, sort the elements inside that stack in ascending order using only push and pop operation. You can use one additional stack only.
For eg.
Input Stack :  5 (top)
            ...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
You are given a number 'N' in the form of a string 'S', which is a palindrome. You need to find the greatest number strictly less than 'N' which is also a pa...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
Answered by CodingNinjas
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Q2. Rotting Oranges
You have been given a grid containing some oranges. Each cell of this grid has one of the three integers values:
Value 0 - representing an empty cell.
Value 1 - representing a fresh...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
Answered by CodingNinjas
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