PhonePe Software Engineer Interview Questions, Process, and Tips

Leetcode medium to hard level

Q1. Dfs bfs in a graph
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4 question (1.5 hrs test) 400 points (100 points for question each)

Q1. Calculate the no.of consecutive zeroes in a binary array
Ans. 
Count consecutive zeroes in a binary array
• Iterate through the binary array and keep track of the maximum consecutive zeroes encountered

• Reset the count of consecutive zeroes when a non-zero element is encountered

• Return the maximum consecutive zeroes found
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Q2. Return k pairs of subsets having sum=num
Ans. 
Return k pairs of subsets with sum=num
• Use a nested loop to iterate through all possible pairs of subsets

• Check if the sum of the subsets equals the target num

• Store the valid pairs in an array and return k pairs
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Q1. 3 sum problem and number of operations required to make 2 strings same
Ans. 
3 sum problem involves finding 3 numbers in an array that add up to a target sum. Number of operations to make 2 strings same involves finding the minimum number of operations (insert, delete, replace) needed to transform one string into another.
• For 3 sum problem, use a hashmap to store complements of each number and check if the complement exists in the hashmap while iterating through the array.

• For number of operation...read more
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Q1. Nearby app machine coding
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Q1. Project and practices followed and hld for inshort
Ans. 
I have experience working on projects using high-level design (HLD) practices.
• Utilized UML diagrams to create HLD for projects

• Followed industry best practices for software design

• Collaborated with team members to ensure HLD aligns with project goals
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Coding test was. good enough with leetfcode medium

Coding test was good enogugh with leetcode medum

Alert notification and logging system

Snakes and Ladder problem

2-3 coding questions were asked - from easy -> medium -> hard level. 1st and 2nd questions were around dynamic programming. Couldn't reach till third question since 1st two questions took time.

Q1. Types of REST API methods?
Ans. 
Types of REST API methods include GET, POST, PUT, DELETE, PATCH, and more.
• GET - Retrieve data from a server

• POST - Create new data on a server

• PUT - Update existing data on a server

• DELETE - Remove data from a server

• PATCH - Partially update data on a server
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