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Paytm QA Automation Engineer Interview Questions and Answers
8 Interview questions
Selenium uses browser-specific drivers to communicate with the browser and automate user actions.
Selenium sends commands to the browser driver, which translates them into browser-specific actions.
The driver then sends the results back to Selenium.
Selenium can interact with the browser using various methods such as find elements, click, type, etc.
Selenium supports multiple browsers such as Chrome, Firefox, Safari, ...
To initialise a browser using Selenium, we need to create an instance of the WebDriver interface.
Import the necessary packages for Selenium and WebDriver
Create an instance of the desired browser driver
Use the driver instance to open a new browser window
PUT is used to update an existing resource, PATCH is used to partially update an existing resource, and POST is used to create a new resource.
PUT replaces the entire resource with the new one, while PATCH only updates the specified fields
PUT and PATCH are idempotent, meaning multiple identical requests will have the same effect as a single request
POST is not idempotent and creates a new resource
PUT and PATCH requi...
SQL CASE statement is used to add conditional logic to SQL queries.
It allows for conditional execution of SQL statements.
It can be used in SELECT, WHERE, and ORDER BY clauses.
It can be used with multiple conditions and ELSE statements.
Example: SELECT name, CASE WHEN age < 18 THEN 'Minor' ELSE 'Adult' END AS age_group FROM users;
Example: SELECT name, CASE WHEN score >= 90 THEN 'A' WHEN score >= 80 THEN 'B' ELSE 'C'...
Non equi join is a type of join in SQL where the condition used is not an equality operator.
Non equi join is used to join tables based on conditions other than equality.
It is used when the join condition involves operators like >, <, >=, <=, etc.
Non equi join can result in a Cartesian product if not used carefully.
Example: SELECT * FROM table1 JOIN table2 ON table1.column1 > table2.column2;
A Java file can have multiple classes, but only one public class.
A Java file can have multiple non-public classes.
The name of the public class must match the name of the file.
Only the public class can be accessed from outside the file.
Test cases to test ATM machine
Verify if the ATM machine is dispensing the correct amount of cash
Check if the ATM machine is accepting valid debit/credit cards
Ensure that the ATM machine is providing proper instructions to the user
Test if the ATM machine is properly handling errors and exceptions
Validate if the ATM machine is maintaining transaction records accurately
A program to reverse the characters of a given string.
Iterate through the string from the end and append each character to a new string.
Use built-in functions like reverse() or StringBuilder in Java.
Convert the string to an array, reverse the array, and convert it back to a string.
Paytm QA Automation Engineer Interview Experiences
1 interview found
Anonymous
Interview Questionnaire
10 Questions
- Q1. WAP to find if two strings are palindrome
- Ans.
A program to check if two strings are palindromes.
Create a function that takes two strings as input.
Reverse the second string and compare it with the first string.
If they are the same, return true. Otherwise, return false.
- Q2. WAP to reverse a integer number without using String
- Ans.
Reversing an integer without using string in Python
Convert the integer to a list of digits
Reverse the list
Convert the list back to an integer
- Q3. WAP to reverse characters of a String
- Ans.
A program to reverse the characters of a given string.
Iterate through the string from the end and append each character to a new string.
Use built-in functions like reverse() or StringBuilder in Java.
Convert the string to an array, reverse the array, and convert it back to a string.
- Q4. Write test cases to test ATM MACHINE
- Ans.
Test cases to test ATM machine
Verify if the ATM machine is dispensing the correct amount of cash
Check if the ATM machine is accepting valid debit/credit cards
Ensure that the ATM machine is providing proper instructions to the user
Test if the ATM machine is properly handling errors and exceptions
Validate if the ATM machine is maintaining transaction records accurately
- Q5. Difference between put patch and post
- Ans.
PUT is used to update an existing resource, PATCH is used to partially update an existing resource, and POST is used to create a new resource.
PUT replaces the entire resource with the new one, while PATCH only updates the specified fields
PUT and PATCH are idempotent, meaning multiple identical requests will have the same effect as a single request
POST is not idempotent and creates a new resource
PUT and PATCH require th...
- Q6. How many classes can be present in a Java file
- Ans.
A Java file can have multiple classes, but only one public class.
A Java file can have multiple non-public classes.
The name of the public class must match the name of the file.
Only the public class can be accessed from outside the file.
- Q7. What is non equi join
- Ans.
Non equi join is a type of join in SQL where the condition used is not an equality operator.
Non equi join is used to join tables based on conditions other than equality.
It is used when the join condition involves operators like >, <, >=, <=, etc.
Non equi join can result in a Cartesian product if not used carefully.
Example: SELECT * FROM table1 JOIN table2 ON table1.column1 > table2.column2;
- Q8. What is SQL CASE STATEMENT
- Ans.
SQL CASE statement is used to add conditional logic to SQL queries.
It allows for conditional execution of SQL statements.
It can be used in SELECT, WHERE, and ORDER BY clauses.
It can be used with multiple conditions and ELSE statements.
Example: SELECT name, CASE WHEN age < 18 THEN 'Minor' ELSE 'Adult' END AS age_group FROM users;
Example: SELECT name, CASE WHEN score >= 90 THEN 'A' WHEN score >= 80 THEN 'B' ELSE 'C' END ...
- Q9. How Do you initialise a browser using selenium
- Ans.
To initialise a browser using Selenium, we need to create an instance of the WebDriver interface.
Import the necessary packages for Selenium and WebDriver
Create an instance of the desired browser driver
Use the driver instance to open a new browser window
- Q10. How selenium works or communicate with browser
- Ans.
Selenium uses browser-specific drivers to communicate with the browser and automate user actions.
Selenium sends commands to the browser driver, which translates them into browser-specific actions.
The driver then sends the results back to Selenium.
Selenium can interact with the browser using various methods such as find elements, click, type, etc.
Selenium supports multiple browsers such as Chrome, Firefox, Safari, and m...
Skills evaluated in this interview
Top trending discussions
Interview questions from similar companies
I applied via Company Website and was interviewed before Jan 2021. There were 3 interview rounds.
(2 Questions)
- Q1. Pl sql Unix api configuration
- Q2. Routing how to use proxy
- Ans.
Routing through a proxy involves configuring the proxy server to forward requests to the destination server.
Configure the proxy server to listen for incoming requests
Configure the proxy server to forward requests to the destination server
Configure the client to use the proxy server for outgoing requests
Use a proxy server to bypass network restrictions or improve performance
Examples: Nginx, Apache, Squid
Interview Preparation Tips
Skills evaluated in this interview
Interview Questionnaire
7 Questions
- Q1. Discussion on my internships and course projects.
- Q2. My field of interest, how well have I fared in it.
- Q3. Design a mvc controller system where given a url, I am able to invoke the right controller. Eg, given "xyz.com/a/b/c", I should be able to invoke c controller by going through a and b
- Ans.
Design an MVC controller system to route URLs to the appropriate controllers based on the URL structure.
Define a routing mechanism that maps URLs to controller actions.
Use a hierarchical structure where each segment of the URL corresponds to a controller.
Example: For 'xyz.com/a/b/c', 'a' routes to 'AController', 'b' to 'BController', and 'c' to 'CController'.
Implement a method to parse the URL and invoke the correspond...
- Q4. Design autocomplete in IDEs
- Ans.
Autocomplete in IDEs helps developers write code faster by suggesting code snippets and completing code as they type.
Autocomplete should suggest code snippets based on the context of the code being written
Autocomplete should prioritize suggestions based on frequency of use
Autocomplete should also suggest variable and function names
Autocomplete should be customizable to allow for user-defined snippets and suggestions
Exa...
- Q5. What is my weakness
- Ans.
My weakness is public speaking.
I tend to get nervous when speaking in front of large groups.
I am working on improving my public speaking skills by practicing and seeking feedback.
I have taken courses and attended workshops to help me overcome my fear of public speaking.
- Q6. Given 2 game scenarios for basketball, and given p as the probability of making a basket in an attempt, I have to understand the condition where game1 would be preferable over game2. In first game, I have ...
- Ans.
Comparing 2 basketball game scenarios with different number of trials and baskets required to win
Calculate the probability of winning in each game scenario using binomial distribution formula
Compare the probabilities to determine which game scenario is preferable
In game1, the probability of winning is p. In game2, the probability of winning is the sum of probabilities of making 2 or 3 baskets
If p is high, game1 is pref...
- Q7. Given a dictionary of words, I have to go from one word to another in least number of transitions where a transition is a defined as changing any letter of the current word such that the new word is also i...
Interview Preparation Tips
Experience: The test was on hackerrank.
Tips: * Fast coding and problem solving required
* Time crunch
* The test is valued a LOT in the hiring process
Duration: 120 minutes
Total Questions: 4
Round: Technical Interview
Experience: Question 1 : He tried to take the discussion to web based technologies to which I straightly told I don’t know. Not sure if that was a good decision. Nevertheless, he went over my resume a lot of times and asked about various projects.
Question 2 : Discussed the various projects related to it.
Question 3 : He asked this question because I had worked on django during my FB internship. I proposed a tree based structure. xyz.com/a/b/c ---> b is child of a, c is child of b.
Question 4 : Next he moved to a very interesting question. Given a simple text editor, I want to facilitate autocomplete feature. We discussed about syntactic methods using language specific keywords. I suggested a trie based implementation which he liked. Later he asked me to improve and redirected me to using scope of the variables, and grammar of the language. We discussed about all the steps I did in language translators lab (macrojava -> minijava -> typechecking -> miniIR -> microIR -> miniRA ->Mips) where we built a Java compiler in Java. We later hopped back to original question and I suggested that we can use grammar to to store multiple (nested kind of) tries for different scope. He asked me how would I define “scope”. He gave me a scenario which helped me come up with the nested trie structure
int a;
{
int b;
{
int c; //a b c can be used
}
{
int d; //a b d can be used
}
}
He then asked me details of how I would code. I said we could use the respective visitors and maintain the current trie root for scope. He liked it but I missed at 2 places :
1. He asked me about token generation used in a compiler and I said flex and bison. I was expected to elaborate a bit.
2. He asked me how the grammar is generated and how the visitors are invoked. I couldn’t explain properly because I was not thorough with it.
Tips: * Keep smiling in the interviews.
* My interviewer had hopped from Microsoft to Visa. We had a short detailed discussion on how the transition was and what drove him to do that.
* It’s always good to know about the company to pick up interesting discussions, read up latest articles and news
* The interviewers want to see if you are passionate about what they are building. Their PPT (Pre Placement Talk) was also focussed majorly on the technologies they are building.
* If you take a question in a direction, make sure you are very very thorough with it. I took it in the direction of compilers, but couldn't make the transition seamlessly because I wasn't thorough with a lot of things (like token generation, visitor invocation).
* Not sure if telling upfront that you don't know about web technologies when you are applying for a profile that might need it is a good idea or not.
Round: Technical Interview
Experience: I think he was a senior person and spoke very passionately about the work that is happening in visa Bangalore office.
Question 1 : I said maybe I should have learnt a little about web based technologies. I think he was looking for a more generic answer.
Question 2 : I went ahead with calculating the expected score where my score random variable = 1 with probability p, and 0 with probability (1-p). I conditioned that expected score of game1 > game2 which would give me the range of p. I goofed up the equations twice but he said he liked my approach and I was just there
Question 3 : I suggested building a graph where a node is a word and an edge means a transition, and then performing BFS. He said that was obvious and that he was more interested in knowing how I build the graph. I suggested a method to reduce the number of string comparisons by storing a count vector with each word. Count vector is a 26 length vector where count[i] = number of times that letter occurs in the word. I would do string comparison to identify neighbours only if the difference in count vectors in 2. Eg, cot = cat - a + o. String comparison is still needed because of false positives. Eg, oct = cat - a + o but cat -> oct is not a valid transition. He liked my approach and asked me to code, discussed the complexity.
Tips: * Don't be naive around a senior engineer. Be confident.
* Explain your approach before going ahead solving it. I missed that in Q1 and for a long time he didn't know what I was heading towards.
* Write clean code, practice coding on paper to make sure you write compilable code. Shabby code is a turn off.
* Show passion for the company you are applying for.
General Tips: * Be friendly and keep smiling.
* Know about the company, well in detail. Recent news, articles, acquisitions, organisational changes, new offices, new product, etc.
* Know about the volume the company handles, certain mind boggling figures, what the company *does not* do
* If you are introducing yourself as an expert in a certain field, be prepared for questions like "How will you contribute to our company with your expertise" type of questions.
* Be very very thorough with every single thing you write on your resume. A small point you weren't sure about might become the basis of your whole interview. Don't write things you are unsure of, or have worked very little on.
Skill Tips: * I think I didn’t take Visa very seriously. I was assuming they won’t take a undergrad and they won’t take me because I have 0 knowledge in web based technologies. I might have acted a little cocky.
* They had nice pie diagrams which shows that they had done thorough research about each and every candidate based on resume and the coding test.
* They value the coding test a lot.
* Be very thorough with the projects you write on resume. They will give you a problem which won't be straightforward and will map onto one of your course projects. You are expected to do the mapping seamlessly. Every bit of the discussion you have with the interviewer can be your next problem.
* Brush up on web based technologies if you can.
* There will be a HR round as well if you clear the technical interviews.
Skills: Maths(esp Probability), Design, Passion, Web Technologies, Technical Skill And Speaking Skill, Coding Skills
College Name: IIT Madras
Motivation: * Been the leader since more than half a century, been through the technological revolution.
* Revolutionising payments architecture. Building something of greatest need, so elegant and optimised, yet producing such consistent performance.
* Keeping up with the need of the generation by introducing features which are brand new. Eg, “all-purpose credit card”.
* Loved their PPT (Pre Placement Talk). Volume of the data and processing is IMMENSE. Billions of transactions in a year voluming up to trillions. More than 200 countries in the world --> these stats are HUGE.
* Fraud detection is a space I would have loved to work on given that I come from a Data Mining background.
Funny Moments: Chucked out before HR round :P
Skills evaluated in this interview
Soumya Patro
Interview Questionnaire
2 Questions
- Q1. Why would you like to join Visa and why?
- Ans.
I want to join Visa to contribute to innovative payment solutions and be part of a global leader in financial technology.
Visa is at the forefront of digital payment innovation, allowing me to work on cutting-edge technologies.
The company's commitment to security aligns with my passion for developing secure software solutions.
Visa's global presence offers opportunities to collaborate with diverse teams and learn from di...
- Q2. Tell me about yourself
- Ans.
I'm a passionate software engineer with a strong background in full-stack development and a love for problem-solving.
Graduated with a degree in Computer Science from XYZ University.
Worked at ABC Corp, where I developed a web application that improved user engagement by 30%.
Proficient in languages like JavaScript, Python, and Java, with experience in frameworks like React and Django.
Enjoy collaborating in agile teams an...
Interview Preparation Tips
Experience: Coding Questions were fairly standard ones.
Duration: 75 minutes
Total Questions: 42
Round: Interview
Experience: Networks based questions, firewalls, TCP/IP and other OSI layers
Round: Interview
Experience: Coding questions. Asked to code on paper. Questions on Object Oriented Design.
Skills: Networks basics, OOPs basics, Coding Skills
College Name: IIT Guwahati
Motivation: Profiles offered, Package, Location
Interview Preparation Tips
Experience: Questions on
1. Programming: 10 Questions2. Machine Learning Hadoop MCQ: 6 Questions3. Networking MCQ: 6 Questions4. Operating System: 6 Questions5. Infrastructure: 6 Questions6. Application Security: 6 Questions
Tips: Questions were simple , except sections 2,5 unless you have a basic idea about it.
Duration: 75 minutes
Total Questions: 34+2
Round: Technical Interview
Experience: – Projects, Internship– Asymmetric and Symmetric encryption with some real world usage– Concepts behind Digital Signature and Digital Certificates– Detailed discussion on HTTPS– Basic OS concepts : Threads, Mutex , Semaphores– Basic OOPS concepts : Virtual functions , Function overloading and overriding , encapsulation.
Tips: Focus on Network Security concepts !
Round: Technical Interview
Experience: – Projects , Internship– Some discussion on Testing and how you would design a unit test case and a complete project test case. Discussion on Automated Testing.– How does a Web application work.– Software Development Models– Discussion on interpreted language and compiled language– Some DBMS basics for efficiency :- Indexing viz. B+trees , Hashing.– Some discussion on Apple Pay , VbV (Verified by Visa) (informal)
Round: HR Interview
Experience: Basic HR questions !
General Tips: Confidence is the key along with sufficient coding practice both on the IDE and pen-paper.
Skills: Network Security, Programming, Algorithms, Operating System
College Name: IIT ROORKEE
I applied via Campus Placement and was interviewed in Dec 2016. There were 5 interview rounds.
Interview Questionnaire
7 Questions
- Q1. Given an array, Implement Binary search tree
- Ans.
Implement Binary Search Tree using given array of strings.
Sort the array in ascending order
Find the middle element and make it the root of the tree
Recursively create left and right subtrees using the left and right halves of the array
Repeat until all elements are added to the tree
- Q2. Given the above Binary search tree, print in ascending order
- Ans.
Print the given Binary search tree in ascending order
Traverse the left subtree recursively
Print the root node
Traverse the right subtree recursively
- Q3. Given an array of stock prices, find where to buy and where to sell for maximum profit in O(n)
- Q4. Resume based
- Q5. What are three problems Chennai faces?
- Ans.
Chennai faces problems related to water scarcity, traffic congestion, and pollution.
Water scarcity due to inadequate rainfall and poor management of water resources.
Traffic congestion due to the increasing number of vehicles and poor road infrastructure.
Pollution caused by industries, vehicular emissions, and improper waste disposal.
- Q6. Which one would you solve and how and why?
- Ans.
Need more context on the question to provide an answer.
Please provide more information on the problem to be solved.
Without context, it is difficult to provide a solution.
Can you please provide more details on the problem statement?
- Q7. What is most interesting thing about Visa?
Interview Preparation Tips
Experience: 4 Coding questions on Hackerrank platform, one and half hour time. I am not going to reveal the questions here, but one was a basic binary tree implementation and the other three were algorithmic and mathematical problems. They were kinda hard to solve in an hour and half. I could do only 1 and half of the other one. I got 115/300 points on that. I was one of the 16 people selected for the interview.
Tips: It all depends on how well you can focus on the test day. Just practice a lot on hackerrank.
Duration: 1 hour 30 minutes
Total Questions: 4
Round: Technical Interview
Experience: The first two questions I was able to do fast enough. I was also asked a few questions on my resume and coding-related internship. The last one, I showed an O(n*n) algorithm first and then modified it to O(n). Around 45 minutes.
Tips: Be thorough on the coding part in your resume. Think out aloud!
Round: Technical + HR Interview
Experience: Just a few normal questions regarding my projects and my favorite course and it's application to Visa. 15 minutes.
Tips: Once again, be thorough on your resume.
Round: HR Interview
Experience: Once again a normal round, just random questions as to whether I am interested and good enough in communication. 15 minutes.
Tips: Don't get shaken. Be ready for all kinds of questions. Especially about Visa relation to what you do
Skills: Smart Coding
College Name: IIT Madras
Skills evaluated in this interview
I appeared for an interview before Apr 2021.
(4 Questions)
Round duration - 45 minutes
Round difficulty - Easy
This was a technical interview round.
- Q1. How does AJAX work?
- Ans.
AJAX allows web pages to be updated asynchronously by exchanging data with a web server behind the scenes.
AJAX stands for Asynchronous JavaScript and XML.
It allows web pages to update content without reloading the entire page.
AJAX uses XMLHttpRequest object to send and receive data from a server.
Commonly used in web applications to provide a more responsive user experience.
- Q2. What is the difference between SOAP and REST?
- Ans.
SOAP is a protocol, while REST is an architectural style for web services.
SOAP is a protocol that uses XML for message format and relies on a request-response model.
REST is an architectural style that uses standard HTTP methods like GET, POST, PUT, DELETE.
SOAP is more rigid and requires more bandwidth, while REST is lightweight and flexible.
SOAP has built-in security features like WS-Security, while REST relies on exte...
- Q3. What is the difference between GET and POST methods in APIs?
- Ans.
GET is used to request data from a server, while POST is used to submit data to a server.
GET requests data from a specified resource, while POST submits data to be processed to a specified resource.
GET requests are cached by browsers, while POST requests are not.
GET requests can be bookmarked and shared, while POST requests cannot.
GET requests have length restrictions, while POST requests do not.
Example: Using GET to r...
- Q4. What is the Observer Pattern?
- Ans.
The Observer Pattern is a behavioral design pattern where an object (subject) maintains a list of dependents (observers) that are notified of any state changes.
Allows for one-to-many dependency between objects
When the subject's state changes, all observers are automatically notified and updated
Commonly used in event handling systems and GUI frameworks
(4 Questions)
Round duration - 40 minutes
Round difficulty - Easy
This was the second technical interview round.
- Q1. What is a singleton class?
- Ans.
A singleton class is a class that can only have one instance created throughout the entire application.
Singleton classes have a private constructor to prevent multiple instances from being created.
They typically provide a static method to access the single instance.
Commonly used for logging, database connections, and configuration settings.
- Q2. What is meant by immutability in Java?
- Ans.
Immutability in Java refers to the property of objects whose state cannot be changed once they are created.
Immutability ensures that once an object is created, its state cannot be modified.
Immutable objects are thread-safe and can be shared without the risk of data corruption.
String class in Java is an example of an immutable class.
To create an immutable class, make the class final, all fields private, and provide only...
- Q3. What is dependency injection?
- Ans.
Dependency injection is a design pattern where components are given their dependencies rather than creating them internally.
Allows for easier testing by providing mock dependencies
Promotes loose coupling between components
Improves code reusability and maintainability
Examples: Constructor injection, Setter injection, Interface injection
- Q4. How do you create an immutable class in Java?
- Ans.
To create an immutable class in Java, make the class final, make all fields private and final, provide only getter methods, and do not provide any setter methods.
Make the class final to prevent inheritance.
Make all fields private and final to prevent modification.
Provide only getter methods to access the fields.
Do not provide any setter methods to modify the fields.
Round duration - 30 minutes
Round difficulty - Easy
HR round with typical behavioral problems.
Interview Preparation Tips
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
Skills evaluated in this interview
I appeared for an interview before Apr 2021.
(2 Questions)
Round duration - 60 minutes
Round difficulty - Easy
Technical Interview round with questions on DSA.
- Q1.
Stock Buy and Sell Problem Statement
You are given an array of integers
PRICESwherePRICES[i]represents the price of a stock on the i-th day, and an integerKrepresenting the number of transactions you... - Ans.
Determine maximum profit with at most K transactions by buying and selling stocks on given days.
Iterate through the array of prices while keeping track of the maximum profit achievable with at most K transactions.
Use dynamic programming to store the maximum profit at each day and transaction count.
Consider buying and selling stocks at each day to calculate the maximum profit.
Return the maximum profit achievable with at...
- Q2.
Sorted Order Printing of a BST Array
Given a Binary Tree consisting of 'N' nodes with integer values, your task is to determine the in-order traversal of the Binary Tree.
Input:
The first line contains ... - Ans.
The task is to determine the in-order traversal of a Binary Tree given in level order.
Implement a function to perform in-order traversal of a Binary Tree
Use recursion to traverse left subtree, visit root, and then traverse right subtree
Handle null nodes denoted by -1 in the input
Round duration - 30 minutes
Round difficulty - Easy
HR round with typical behavioral problems.
Interview Preparation Tips
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
Skills evaluated in this interview
Jeevan Sankar
I applied via Campus Placement and was interviewed in Dec 2016. There were 5 interview rounds.
Interview Questionnaire
4 Questions
- Q1. Questions about projects
- Q2. Why Paypal?
- Ans.
Paypal is a leading online payment platform with a strong reputation and global presence.
Paypal is a well-established and trusted online payment platform used by millions of users worldwide.
It offers secure and convenient payment options for both individuals and businesses.
Paypal has a strong focus on innovation and technology, making it an exciting place to work for software engineers.
Working at Paypal provides opport...
- Q3. What does Paypal do?
- Ans.
Paypal is a digital payment platform that allows individuals and businesses to make online transactions.
Paypal provides a secure way to send and receive money online.
It allows users to link their bank accounts, credit cards, or debit cards to their Paypal account.
Users can make payments to merchants or individuals using their Paypal balance or linked payment methods.
Paypal offers buyer and seller protection, dispute re...
- Q4. How do you see yourself in 5 years?
- Ans.
In 5 years, I see myself as a senior software engineer leading a team of developers on innovative projects.
Continuing to enhance my technical skills and knowledge through ongoing learning and certifications
Taking on more leadership responsibilities and mentoring junior team members
Contributing to the development of cutting-edge software solutions
Building strong relationships with colleagues and stakeholders to drive pr...
Interview Preparation Tips
Experience: One Programming and 15 multiple choice Questions.
Duration: 1 hour 30 minutes
Total Questions: 16
Round: Technical Interview
Experience: All details about projects you have written on resume. Some different implementation of some parts of your project.
Skills: Knowledge about Database Managements Systems, Problem Solving Skills
College Name: IIT Madras
leninkumar babu
I applied via Campus Placement and was interviewed in Dec 2016. There were 5 interview rounds.
Interview Questionnaire
11 Questions
- Q1. Detecting loop in linked list
- Ans.
Detecting loop in a linked list
Use two pointers, one moving one node at a time and the other moving two nodes at a time
If there is a loop, the two pointers will eventually meet
If any of the pointers reach the end of the list, there is no loop
- Q2. Write code for dfs
- Ans.
DFS (Depth-First Search) is a graph traversal algorithm that explores as far as possible along each branch before backtracking.
DFS uses a stack to keep track of visited nodes and explore adjacent nodes.
It can be implemented recursively or iteratively.
DFS is useful for solving problems like finding connected components, detecting cycles, and solving mazes.
- Q3. How to find cycle in graph
- Ans.
To find a cycle in a graph, use depth-first search (DFS) and keep track of visited nodes.
Implement DFS algorithm to traverse the graph
Maintain a visited array to keep track of visited nodes
If a visited node is encountered again during DFS, a cycle exists
- Q4. What is hashing and how will you implement?
- Ans.
Hashing is a process of converting data into a fixed-size numerical value called a hash code.
Hashing is used to quickly retrieve data from large datasets.
It is commonly used in data structures like hash tables and hash maps.
Hash functions should be fast, deterministic, and produce unique hash codes for different inputs.
Examples of hash functions include MD5, SHA-1, and SHA-256.
- Q5. Questions related to to resume
- Q6. No of pairs between 1 and N satisfy relation pow(a,3)+pow(b,3)=pow(c,3)+pow(d,3).a,b,c,d<=N
- Ans.
The question asks for the number of pairs between 1 and N that satisfy a specific mathematical relation.
The relation is pow(a,3) + pow(b,3) = pow(c,3) + pow(d,3)
The values of a, b, c, and d should be less than or equal to N
Count the number of pairs that satisfy the relation
- Q7. -----.php?pid=514
- Q8. Questions related to resume
- Q9. Explain Merge sort
- Ans.
Merge sort is a divide-and-conquer algorithm that recursively divides an array into two halves, sorts them, and then merges them.
Divide the array into two halves
Recursively sort each half
Merge the sorted halves back together
Repeat until the entire array is sorted
- Q10. Why do you want to join in paypal?
- Ans.
I want to join PayPal because of its innovative technology, global impact, and strong company culture.
Innovative technology - PayPal is known for its cutting-edge technology and digital payment solutions.
Global impact - Working at PayPal would allow me to contribute to a company that has a worldwide reach and influence.
Strong company culture - I value a company that prioritizes diversity, inclusion, and employee well-b...
- Q11. Explain anything whatever you learned recently?
- Ans.
I recently learned about the benefits of using Docker for containerization.
Docker allows for easy packaging and deployment of applications
It helps in creating consistent environments across different platforms
Docker containers are lightweight and efficient
Example: I used Docker to containerize a microservices architecture for a recent project
Interview Preparation Tips
Experience: coding question related to palindrome portioning.MCQs related to cs fundamentals
Duration: 1 hour 30 minutes
Skills: General Coding And Problem Solving
College Name: IIT Madras
Skills evaluated in this interview
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