Planful Senior Software Engineer Interview Questions and Answers

Q1. Level order traversal of tree similar question
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Q2. Sql window function based question
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Q3. Design a key generator
Ans. 
A key generator is a tool used to create unique keys for various purposes.
• Use a combination of letters, numbers, and special characters to create a unique key

• Consider using a hashing algorithm to generate the key

• Ensure the key is sufficiently long and random to minimize the chance of collisions
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Results from pseudo code or steps from an algorithm

Mainly the process of handling issues and development process

Array and OOPS concept. Given set of questions to solve with each oops concept

Q1. Out of box thinking. Given logical puzzles and ask you to analyze and provide your understanding
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Q2. Explain the inheritance concept with car model
Ans. 
Inheritance in car model refers to the ability of a new car model to inherit features and characteristics from an existing car model.
• Inheritance allows for the creation of a new car model that shares common features with an existing car model

• The new car model can add or modify features inherited from the existing car model

• For example, a new sports car model can inherit features from a base car model such as engine, tra...read more
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Q3. Probability question with fruits and boxes
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Q1. How to rotate a matrix?
Ans. 
To rotate a matrix, transpose it and then reverse each row or column depending on the direction of rotation.
• Transpose the matrix by swapping elements across the diagonal

• For clockwise rotation, reverse each row of the transposed matrix

• For anti-clockwise rotation, reverse each column of the transposed matrix
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Q2. How to find a particular element in a sorted array?
Ans. 
Use binary search to efficiently find a particular element in a sorted array.
• Start by comparing the target element with the middle element of the array.

• If the target element is less than the middle element, search the left half of the array.

• If the target element is greater than the middle element, search the right half of the array.

• Repeat the process until the target element is found or the search space is empty.
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2 coding question one easy one medium

Q1. MAx sum of non adjacent elements
Ans. 
Find the maximum sum of non-adjacent elements in an array.
• Create an array to store the maximum sum at each index

• Iterate through the input array and calculate the maximum sum considering the current element and the previous non-adjacent element

• Return the maximum sum found
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Q2. Optimize it further
Ans. 
Utilize efficient algorithms, minimize redundant code, optimize database queries
• Use data structures like hash maps or binary trees for faster lookups

• Minimize nested loops and unnecessary iterations

• Optimize database queries by using indexes and avoiding unnecessary joins
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Q1. They ask me about my previous job description details and education details
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Q2. About carrier goals
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Q3. About my responsibility in side the current company
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Q1. They ask me about core concept of react js and next js
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Q2. Ask me about core concepts of mongo Db and Node js
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Q1. They told me about company curriculum, goals and ethics
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Q1. What is jdk, string related questions, basic java oops questions?
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