Infosys Interview Questions, Process, and Tips

3 coding questions in 3 hours.

Q1. Introduce yourself
Ans. 
I am a software developer with 5 years of experience in Java, Python, and SQL.
• 5 years of experience in Java, Python, and SQL

• Strong problem-solving skills

• Experience working in Agile development environment
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Q2. Explain about the projects you're working currently
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Q3. Do you have work experience in backend technologies
Ans. 
Yes, I have 3 years of work experience in backend technologies including Java, Spring Boot, and SQL databases.
• Worked with Java for backend development

• Experience with Spring Boot framework

• Proficient in working with SQL databases like MySQL and PostgreSQL
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Q4. Asked few questions in mentioned technologies
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Q5. Explain the logic of longest substring
Ans. 
Longest substring refers to finding the continuous sequence of characters within a string with no repeating characters.
• Iterate through the string and keep track of the characters seen so far

• Use a hashmap to store the index of each character

• Update the start index of the substring when a repeating character is encountered

• Calculate the length of the current substring and update the longest substring found so far
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Q1. What is a Python program that can be used to determine the best price for selling stocks?
Ans. 
A Python program using historical stock data and algorithms to determine the best price for selling stocks.
• Use historical stock data to analyze trends and patterns

• Implement algorithms like moving averages or RSI to predict stock price movements

• Consider factors like volume, volatility, and market sentiment

• Optimize the program for real-time data updates and accurate predictions
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Q2. Can you write a Python program to determine whether two given words are anagrams of each other without using built-in functions?
Ans. 
Program to check if two words are anagrams without using built-in functions
• Create a function that takes in two strings as input

• Convert both strings to lists of characters

• Sort the lists of characters

• Check if the sorted lists are equal to determine if the words are anagrams
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All went good and easy to handle

All went good and easy to handle

Q1. About previous organizations
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Q1. Basics of networking and technology
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Q1. When you about to join
Ans. 
I am excited to join and contribute my technical skills to the team.
• I have completed my degree in Engineering with a focus on technical skills.

• I have previous experience working on technical projects during internships.

• I am eager to learn and adapt to new technologies and tools in the field.
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Q1. Difference between list and set
Ans. 
Lists are ordered and allow duplicates; sets are unordered and do not allow duplicates.
• Lists maintain the order of elements. Example: [1, 2, 3, 3] has duplicates.

• Sets do not maintain order and eliminate duplicates. Example: {1, 2, 3} only keeps unique values.

• Lists can be indexed and sliced. Example: list[0] gives the first element.

• Sets are optimized for membership tests. Example: '3 in set' is faster than '3 in list'.

• L...read more
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Q2. Difference between abstract class and interface
Ans. 
Abstract classes allow partial implementation, while interfaces define a contract with no implementation.
• Abstract classes can have both abstract methods (without implementation) and concrete methods (with implementation).

• Interfaces can only declare methods (no implementation) and can include default methods since Java 8.

• A class can inherit from only one abstract class but can implement multiple interfaces.

• Example of an...read more
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