'Coding has over 700 languages', '67% of programming jobs aren’t in the technology industry', 'Coding is behind almost everything that is powered by electricity'
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SDE - Intern
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1 rounds | 4 Coding problems
Interview preparation journey
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Preparation
Duration: 2 months
Topics: Data Structure,OOPS, Java, Graphs, Pointers
Tip
Tip

Tip 1 : Do at least 1 project.
Tip 2 : Practice data structure questions.
Tip 3 : Dynamic programming is must.

Application process
Where: Campus
Eligibility: Above 8 CGPA
Resume Tip
Resume tip

Tip 1 : Do not put false things.
Tip 2 : Keep it short and direct.

Interview rounds
01
Round
Medium
Online Coding Interview
Duration90 minutes
Interview date12 Feb 2021
Coding problem4

Timing was 10AM. The platform was quite good.

1. Maximum size rectangle sub-matrix with all 1's
Hard
10m average time
80% success
0/120
Asked in companies
American ExpressRazorpayCisco

You are given an 'N' * 'M' sized binary-valued matrix 'MAT, where 'N' is the number of row...

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Problem approach

If the height of bars of the histogram is given then the largest area of the histogram can be found. This way in each row, the largest area of bars of the histogram can be found. To get the largest rectangle full of 1’s, update the next row with the previous row and find the largest area under the histogram, i.e. consider each 1’s as filled squares and 0’s with an empty square and consider each...

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2. Maximum Sum path of a binary tree.
Hard
25m average time
75% success
0/120
Asked in companies
OlaDelhiveryGartner

You are given a binary tree having 'n' nodes. Each node of the tree has an integer value.


Your task is to find the maximum...

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Problem approach

For each node there can be four ways that the max path goes through the node:
1. Node only
2. Max path through Left Child + Node
3. Max path through Right Child + Node
4. Max path through Left Child + Node + Max path through Right Child

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3. Minimum number of swaps required to sort an array
Easy
10m average time
90% success
0/40
Asked in companies
Publicis SapientSprinklrSalesforce

You have been given an array 'ARR' of 'N' distinct elements.

Your task is to find the minimum no. of swaps required to sort the array.

For example:
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Problem approach

This can be easily done by visualizing the problem as a graph. We will have n nodes and an edge directed from node i to node j if the element at i’th index must be present at j’th index in the sorted array.

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4. Prefix to Infix
Easy
10m average time
90% success
0/40
Asked in companies
Info Edge India (Naukri.com)SamsungJP Morgan

You are given a string denoting a valid Prefix expression containing ‘+’, ’-’, ’*’, ‘/’ and lowercase letters.


Convert the given Prefix expression into an Infix expression.


Not...
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Problem approach

Algorithm for Prefix to Infix:

Read the Prefix expression in reverse order (from right to left)
If the symbol is an operand, then push it onto the Stack
If the symbol is an operator, then pop two operands from the Stack
Create a string by concatenating the two operands and the operator between them.
string = (operand1 + operator + operand2)
And push the resultant string ba...

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