Razorpay Software Development Engineer Interview Questions and Answers

Two string manipulation DSA questions (EASY + MEDIUM)

1 medium egg dropping problem
1 hard string manipulation
Dsa problems

3 dsa questions (2 medium+1 hard)
1. Two Voting quque
2. Some dp
3. Trie implementation

Q1. 1. LLD design of ludo 2. Random API design 3. Few questions on Java Spring
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Low level design of a car rental service in java.

Graph based algorithms were discussed and coded.

Q1. Was supposed to be a culture fit, but was asked DSA questions. Sorting algorithms, merge sort was implemented.
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Q1. Merge two sorted linked lists
Ans. 
Merge two sorted linked lists into a single sorted linked list
• Create a new linked list to store the merged result

• Iterate through both input linked lists and compare nodes to determine the order in which they should be added to the result list

• Handle cases where one list is longer than the other
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Q2. Check if paranthesis are balanced or not
Ans. 
To check if parentheses are balanced, use a stack data structure to keep track of opening and closing parentheses.
• Use a stack to push opening parentheses and pop when encountering a closing parenthesis

• If stack is empty when encountering a closing parenthesis, return false

• After iterating through all parentheses, if stack is empty, return true
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Q1. Right view of a Binary Search tree
Ans. 
The right view of a Binary Search Tree shows the nodes that are visible when viewing the tree from the right side.
• The right view of a Binary Search Tree includes the rightmost node at each level.

• Nodes at each level that are not visible from the right side are not included in the right view.

• Example: For the Binary Search Tree with values 1, 2, 3, 4, 5, the right view would be 1, 3, 5.
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Q2. Few javascript questions on how to parse a json object without using inbuilt libraries.
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Q1. Explain the react lifecycle functions and how they work
Ans. 
React lifecycle functions are methods that are automatically called at specific points in a component's life cycle.
• Mounting: constructor, render, componentDidMount

• Updating: render, componentDidUpdate

• Unmounting: componentWillUnmount
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Q2. Css box model, difference between padding and margin
Ans. 
Padding is the space inside the border of an element, while margin is the space outside the border.
• Padding is used to create space between the content and the border of an element.

• Margin is used to create space between the border of an element and other elements.

• Padding affects the size of the content area, while margin affects the positioning of the element.

• Example: padding: 10px will create 10 pixels of space inside ...read more
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Q1. What are your salary expectations in CTC and variables?
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Q2. Will you relocate to the location required?
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Write code for advance surrying in js

Implement custom hook for api call

Q1. Basic questions arounf my previous work
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Q2. Technical questions around performance and code optimization
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75 min test with 18 Java theory questions

Q1. Synchronized keyword usage
Ans. 
The synchronized keyword in Java is used to control access to shared resources in a multithreaded environment.
• Synchronized keyword can be used to synchronize access to critical sections of code to prevent race conditions.

• It can be applied to methods or code blocks to ensure only one thread can access them at a time.

• Example: synchronized void myMethod() { // code }

• Example: synchronized(this) { // code }
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Q2. Message Queue types
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Q3. Thread Contention
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Q4. Java Profiling Tools
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Q5. Abstract classes
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