Visa Software Engineer Interview Questions, Process, and Tips

Q1. Two Sum of numbers with given target value
Ans. 
Given an array of integers, find two numbers that add up to a given target value.
• Use a hash map to store the difference between the target value and each element in the array.

• Iterate through the array and check if the current element exists in the hash map.

• If it does, return the indices of the two numbers.

• If no solution is found, return an empty array.
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Q2. Calculate the time taken by kth person to collect n number of tickets
Ans. 
The time taken by the kth person to collect n number of tickets can be calculated using a formula.
• Use the formula: time = (n - 1) * k

• Subtract 1 from n because the first person doesn't need to wait for anyone

• Multiply the result by k to get the time taken by the kth person

• Example: If n = 5 and k = 3, the time taken by the 3rd person would be (5 - 1) * 3 = 12
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Q3. Seperation of even and odd numbers
Ans. 
Separate even and odd numbers in an array
• Iterate through the array and check if each number is even or odd

• Create two separate arrays for even and odd numbers

• Add the even numbers to the even array and odd numbers to the odd array

• Return both arrays as the result
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Coding test link will be given

Q1. Mostly on DSA and problem solving
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Q1. Mostly on your Resume and basic HR Questions
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Coding test consisted of basic coding questions on codesignal platform

Q1. Describe the work experience
Ans. 
I have 5 years of experience working as a software engineer in a tech company.
• Developed and maintained software applications for various platforms

• Collaborated with cross-functional teams to design and implement new features

• Participated in code reviews and provided feedback to improve code quality

• Troubleshooted and resolved technical issues reported by users

• Stayed updated on latest technologies and trends in the industr
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Q2. Write code in python using pandas to perform certain tasks
Ans. 
Using pandas in Python to perform tasks for a Software Engineer interview question
• Import pandas library

• Read data from a CSV file using pandas

• Perform data manipulation and analysis using pandas functions

• Write the processed data back to a new CSV file
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Q1. What is your strength
Ans. 
My strength is problem-solving and analytical thinking.
• I have a strong ability to analyze complex problems and break them down into smaller, manageable tasks.

• I am skilled in identifying patterns and finding efficient solutions.

• I have experience in using various programming languages and tools to solve problems.

• I am a quick learner and adapt well to new technologies and frameworks.

• I have a track record of successfully d...read more
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Q2. What is class in java
Ans. 
A class in Java is a blueprint or template for creating objects that encapsulate data and behavior.
• A class can contain fields, methods, constructors, and nested classes

• Objects are instances of a class

• Inheritance allows a class to inherit properties and methods from another class

• Polymorphism allows objects of different classes to be treated as if they are of the same class

• Example: class Car { String make; int year; void...read more
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Q3. Blue print is the java class
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Good questions in less time, one hard dynamic programming problem

Q1. Great interviewer and had a great discussion about systems design and some basic coding problems were there.
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Q2. How Visa works Can you design a scalable file access system like dropbox or google drive?
Ans. 
Visa is a payment processing company that facilitates electronic funds transfers globally.
• Visa operates a network that connects financial institutions, merchants, and consumers worldwide.

• The company provides payment products and services, including credit and debit cards, prepaid cards, and digital wallets.

• Visa's payment processing system involves authorization, clearing, and settlement of transactions.

• To design a scal...read more
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90 minutes hackerrank test, 3 questions 1 easy 2 medium.

Q1. Resume based and questions based on my personal projects
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Q1. CN,OS and DBMS questions.
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Q1. Managerial round and hr questions
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