Cashfree Payments Software Development Engineer Interview Questions and Answers

Q1. Machine coding round for SQL
Add your answer

Q1. LLD HLD HM rounds
Add your answer

Q1. Find connected components in a graph
Ans. 
Use Depth First Search (DFS) to find connected components in a graph
• Start by initializing all vertices as unvisited

• Iterate through each vertex and perform DFS to find connected components

• Keep track of visited vertices to avoid revisiting

• Example: For a graph with vertices {A, B, C} and edges {(A, B), (B, C)}, the connected components are {A, B, C}
Answered by AI
Add your answer

Q1. Design chess game
Ans. 
Design a chess game with proper board setup, piece movements, and win conditions.
• Create a 8x8 grid to represent the chess board

• Assign initial positions to each type of chess piece (pawn, rook, knight, bishop, queen, king)

• Implement rules for each piece's movement (e.g. pawn moves forward, rook moves horizontally/vertically)

• Check for valid moves and capture opponent's pieces

• Implement win conditions (checkmate, stalemate)

• ...read more
Answered by AI
Add your answer

Q1. DHCP and DNS difference
Ans. 
DHCP assigns IP addresses to devices on a network, while DNS resolves domain names to IP addresses.
• DHCP dynamically assigns IP addresses to devices on a network

• DNS resolves domain names to IP addresses

• DHCP is used for automatic IP address configuration

• DNS is used for translating domain names to IP addresses

• DHCP operates at the network layer (Layer 3)

• DNS operates at the application layer (Layer 7)
Answered by AI
Add your answer
Q2. Networking protocols and respective port numbers.
Ans. 
Networking protocols and their respective port numbers are essential for communication between devices.
• HTTP - Port 80

• HTTPS - Port 443

• FTP - Port 21

• SMTP - Port 25

• SSH - Port 22

• DNS - Port 53
Answered by AI
Add your answer

Q1. Current and expected Salary
Add your answer
Q2. Reason for leaving the current company.
Add your answer

DSA 2 questions , medium difficulty

Q1. LLD for spotify
Add your answer
Q2. Indepth questions on the 1st one
Add your answer

Q1. Why are you shifting
Add your answer
Q2. Basic cultural and behavioural questions
Add your answer

Q1. Minimum number of platforms required for train station
Ans. 
Minimum of two platforms are required for a train station.
• At least two platforms are needed for trains to arrive and depart simultaneously.

• Additional platforms may be required depending on the frequency of trains and passenger traffic.

• Platforms should be long enough to accommodate the longest trains that will use the station.
Answered by AI
Add your answer
Q2. Longest Palindromic substring
Ans. 
The problem is to find the longest substring that is a palindrome in a given string.
• A palindrome is a string that reads the same backward as forward.

• We can use dynamic programming to solve this problem.

• We can start by considering each character as the center of a palindrome and expand outwards to find the longest palindrome.

• We can also optimize the solution by using Manacher's algorithm which reduces the time complexit
Answered by AI
Add your answer

There were 2 easy question 1 medium
Question were good but have weak test case.

This was project or lld round.
You just be aware of class and other stuff.

Q1. Discussion on project Asked graph coding question in real scenerio. Like asked what algorithm you will use for different real life problems
Add your answer

Q1. Why engineering and what u know about cred
Add your answer

Q1. Basics on profile,work experience etc
Add your answer
Q2. Skills discussion based on role and resume
Add your answer

DSA in preferred language, Java coding testt