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Infosys Technical Lead Interview Questions and Answers
77 Interview questions
Design patterns are reusable solutions to common problems in software design.
Design patterns provide a way to create flexible and maintainable software systems.
They help in organizing code, making it more readable and easier to maintain.
Examples of design patterns include Singleton, Factory, Observer, and Strategy patterns.
Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.
Abstract class can have constructors, fields, and methods, while interface cannot have any implementation.
A class can implement multiple interfaces but can only inherit from one abstract class.
Abstract classes are used to define a common behavior for subclasses, while interfaces are used to define a contr...
Generate prime numbers from 1 to n
Iterate from 2 to n and check if each number is prime
Use a boolean array to mark non-prime numbers
Optimize by only checking up to square root of n
Decorator pattern allows adding new functionality to an object dynamically.
Decorator pattern involves adding new behaviors to objects by wrapping them in another object.
It allows for adding functionality without altering the original object.
Example: Adding logging functionality to a method by decorating it with a logging decorator.
You can sort fields in a GDG version by using the SORT statement in JCL.
Use the SORT statement in JCL to sort fields in a GDG version.
Specify the fields to be sorted and the comparison criteria in the SORT statement.
Example: SORT FIELDS=(1,10,CH,A)
Event loop in JavaScript is responsible for handling asynchronous operations by continuously checking the call stack and the callback queue.
Event loop is a mechanism that allows JavaScript to perform non-blocking I/O operations.
It continuously checks the call stack for any function that needs to be executed and the callback queue for any function that needs to be pushed to the call stack.
Example: setTimeout() func...
Find the pair of integers with the lowest absolute difference in an array.
Iterate through the array and compare the absolute difference between each pair of integers.
Keep track of the pair with the lowest absolute difference as you iterate.
Return the pair with the lowest absolute difference.
Core technology involves software development, focusing on architecture, frameworks, and best practices for scalable applications.
Software Architecture: Understanding design patterns like MVC (Model-View-Controller) for organizing code.
Frameworks: Utilizing frameworks such as React for front-end development or Node.js for back-end services.
Version Control: Using Git for source code management, enabling collaborati...
Implementing CI/CD involves automating the process of integrating code changes and deploying them to production.
Set up a version control system like Git to track changes in code
Use a continuous integration tool like Jenkins to automatically build and test code changes
Implement automated testing to ensure code quality and catch bugs early
Use a continuous delivery tool like Docker to package and deploy code changes
I...
Endianness refers to the order of bytes in computer memory, affecting data representation and processing.
Big-endian stores the most significant byte at the smallest address (e.g., 0x12345678 -> 12 34 56 78).
Little-endian stores the least significant byte at the smallest address (e.g., 0x12345678 -> 78 56 34 12).
Endianness affects data transmission between different systems (e.g., network protocols often use ...
Infosys Technical Lead Interview Experiences
132 interviews found
Anonymous
Selected
I appeared for an interview in May 2025, where I was asked the following questions.
- Q1. Introduce your self
- Ans.
Experienced Technical Lead with a strong background in software development and team management, passionate about delivering innovative solutions.
Over 10 years of experience in software development, specializing in Java and Python.
Led a team of 8 developers in a successful project that improved system performance by 30%.
Implemented Agile methodologies, resulting in a 25% increase in team productivity.
Strong communicati...
- Q2. Basic iOS Swift concepts
- Q3. From resume what ever you worked on
- Ans.
I have extensive experience in software development, team leadership, and project management across various technologies.
Led a team of 5 developers in creating a web application using React and Node.js, improving user engagement by 30%.
Implemented Agile methodologies, resulting in a 25% increase in project delivery speed.
Designed and optimized RESTful APIs, enhancing system performance and reducing response time by 40%...
I applied via Company Website and was interviewed in Aug 2024. There were 2 interview rounds.
(2 Questions)
- Q1. Tell me about yourself and your project
- Ans.
I am a seasoned Technical Lead with experience in leading projects from conception to completion.
Led a team of developers in the development of a new e-commerce platform
Implemented agile methodologies to improve project efficiency
Collaborated with stakeholders to gather requirements and ensure project alignment
- Q2. Some Logics , Java and microservices scenario based questions
(2 Questions)
- Q1. Managerial Round - Roles and Responsibility questions
- Q2. Scenario based question on our skills
Interview Preparation Tips
I applied via Approached by Company and was interviewed in Jul 2024. There were 2 interview rounds.
Coding test is a programming challenge that assesses a developer's coding skills and problem-solving abilities. Coding tests can be used in a variety of situations, such as during the hiring process, as part of a professional certification program, or to assess a developer's current skill level.
Here are some details about coding tests:
Types of coding tests
Coding tests can range from simple challenges that can be completed in minutes to more complex projects that can take hours or days.
What to expect
During a coding test, you may be given a problem to solve and asked to write code to solve it. You may also be asked questions about your thought process while you're coding.
How to prepare
To prepare for a coding test, you can practice coding on a whiteboard or blank sheet of paper. You can also get used to writing code without an integrated development environment (IDE) or compiler.
How to take the test
You may be given a link to a code editor and be able to choose your programming language. You should make sure to take the test in a quiet environment where you won't be distracted.
How recruiters use coding tests
Coding tests can help recruiters assess a large number of candidates effectively because they can use an auto-grading system.
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Interview Preparation Tips
Use your network: Use your professional network of peers and mentors to your advantage.
Enhance your skills: Identify any skill gaps in your desired field and take steps to improve them. You can take online courses, certifications, or workshops to stay competitive.
Pursue your passion: Find out what you love doing and pursue a career in that field.
Prepare for interviews: Be prepared for your interview, as it means your resume or networking strategy has intrigued the organization.
Join job seeker groups: Many companies post job openings in job seeker groups before posting them on their company websites or job boards.
Build an online presence: Keep your LinkedIn profile up-to-date and reflective of your achievements and expertise.
Make job hunting your job: Schedule a set time every day to work on your job search.
Screen your social media: Use social media to network with professionals in your field, participate in industry groups, and build relationships.
Add skills and endorsements: Gather endorsements from colleagues, clients, or mentors to enhance your credibility.
I applied via Recruitment Consulltant and was interviewed in Jul 2024. There was 1 interview round.
(5 Questions)
- Q1. How can you pass value to a program
- Ans.
Values can be passed to a program through command line arguments, environment variables, configuration files, and user input.
Command line arguments: Values can be passed to a program when it is executed from the command line.
Environment variables: Values can be passed to a program through environment variables set in the operating system.
Configuration files: Programs can read values from configuration files to customiz...
- Q2. How to find the 5th highest value of salary of the employee table
- Ans.
To find the 5th highest value of salary in the employee table, you can use SQL query with the ORDER BY and LIMIT clauses.
Use SQL query with ORDER BY clause to sort the salaries in descending order
Use LIMIT 4,1 to skip the first 4 highest salaries and get the 5th highest salary
- Q3. Substring in sort
- Ans.
Sort an array of strings based on a substring
Use a custom comparator function to sort the array based on a specific substring
Implement the comparator function to compare substrings of each string in the array
Example: Sort array ['apple', 'banana', 'cherry'] based on substring 'an' -> ['banana', 'cherry', 'apple']
- Q4. How to accept parm parameter in cobol . Tell the structure of declaration in cobol
- Ans.
In COBOL, parm parameters can be accepted using the ACCEPT statement. The declaration structure includes the PICTURE clause.
Use ACCEPT statement to accept parm parameter in COBOL
Declare parm parameter using PICTURE clause in COBOL
Example: ACCEPT parm-parameter
Example: 01 parm-parameter PIC X(10)
- Q5. What is global and local variable
- Ans.
Global variables are accessible throughout the entire program, while local variables are only accessible within a specific function or block of code.
Global variables are declared outside of any function or block.
Local variables are declared within a function or block and are only accessible within that function or block.
Global variables can be accessed and modified by any part of the program.
Local variables have limite...
Interview Preparation Tips
Skills evaluated in this interview
(2 Questions)
- Q1. Constructor , DI, Opps Question
- Q2. Design Pattern , MVC and Net core Question
I applied via Naukri.com and was interviewed in Jul 2024. There were 3 interview rounds.
(2 Questions)
- Q1. Bigquery architecture
- Q2. Real time scenario questions
(2 Questions)
- Q1. Architecture and design of streaming data pipeline in gcp
- Ans.
Designing a streaming data pipeline in GCP involves selecting appropriate services like Pub/Sub, Dataflow, BigQuery, and Cloud Storage.
Use Google Cloud Pub/Sub for ingesting and distributing data streams
Utilize Google Cloud Dataflow for processing and transforming data in real-time
Store processed data in Google BigQuery for analysis and querying
Consider using Google Cloud Storage for storing raw data or backups
- Q2. Cloud migration challenges
- Ans.
Cloud migration challenges include security concerns, data transfer issues, and compatibility problems.
Security concerns related to data privacy and compliance regulations
Data transfer issues such as bandwidth limitations and latency
Compatibility problems with existing systems and applications
Lack of skilled resources for managing cloud infrastructure
Cost management and budget constraints
Potential downtime during migra...
(2 Questions)
- Q1. Salary discussion
- Q2. Why you want to join company
- Ans.
I want to join the company because of its innovative technology solutions and strong reputation in the industry.
Impressed by the company's track record of successful projects
Excited about the opportunity to work with cutting-edge technology
Looking to be part of a team that values collaboration and creativity
Interview Preparation Tips
Skills evaluated in this interview
Selected
I applied via Referral and was interviewed in Jul 2024. There were 3 interview rounds.
(2 Questions)
- Q1. JavaScript promises async
- Q2. Angular basics components directives forms interceptor services
(2 Questions)
- Q1. Scenario based questions
- Q2. Signal new feature
- Ans.
Signal new feature is a way to inform users about a new functionality or improvement in a product.
Create a notification or pop-up message to alert users about the new feature
Include a brief description of the new feature and its benefits
Provide a link or button for users to learn more or try out the new feature
(2 Questions)
- Q1. Why you want to leave
- Ans.
Seeking new challenges and growth opportunities in a different environment.
Desire for professional growth
Seeking new challenges
Exploring different work environment
- Q2. What role you have worked on
- Ans.
I have worked as a Technical Lead in various projects, leading development teams and overseeing technical aspects of software development.
Led development teams in implementing software solutions
Oversaw technical architecture and design decisions
Mentored team members and provided technical guidance
Collaborated with stakeholders to gather requirements and define project scope
Interview Preparation Tips
Selected
I applied via Company Website and was interviewed in May 2024. There were 2 interview rounds.
(4 Questions)
- Q1. List vs Tuple, difference, what is ordered and indexing in them, how you iterate
- Ans.
List and Tuple differences, ordering, indexing, and iteration
List is mutable, Tuple is immutable
Lists are ordered and indexed starting from 0, Tuples are also ordered but indexed starting from 0
Iterating through a List: for item in my_list: print(item)
Iterating through a Tuple: for item in my_tuple: print(item)
- Q2. Decorator with example code
- Ans.
Decorator pattern allows adding new functionality to an object dynamically.
Decorator pattern involves adding new behaviors to objects by wrapping them in another object.
It allows for adding functionality without altering the original object.
Example: Adding logging functionality to a method by decorating it with a logging decorator.
- Q3. Generate prime numbers from 1 to n
- Ans.
Generate prime numbers from 1 to n
Iterate from 2 to n and check if each number is prime
Use a boolean array to mark non-prime numbers
Optimize by only checking up to square root of n
- Q4. Aws services, more on lambda processing, events , context
(2 Questions)
- Q1. General team handling skills
- Q2. In case of absentees in the team and end date is nearing means how you would communicate with stakeholders and completion strategy
Interview Preparation Tips
Skills evaluated in this interview
Selected
I applied via Referral and was interviewed in Aug 2024. There were 2 interview rounds.
Coding questions from leetcode. 15 minutes to solve
(2 Questions)
- Q1. What are life cycle hooks in angular?
- Ans.
Life cycle hooks in Angular are functions that allow you to tap into specific points in a component's life cycle.
Angular components have several life cycle hooks such as ngOnInit, ngOnDestroy, ngOnChanges, etc.
These hooks allow you to perform actions at specific points in the component's life cycle, such as initialization, change detection, and destruction.
For example, ngOnInit is called after the component has been in...
- Q2. Pure and impure pipes in Angular
- Ans.
Pure pipes do not change the input data, while impure pipes can change the input data.
Pure pipes are used for data transformation without side effects.
Impure pipes can have side effects and are used for operations like logging or API calls.
Pure pipes are faster as they are only executed when a pure change to the input is detected.
Impure pipes are executed on every change detection cycle.
Example: currency pipe is pure, ...
Interview Preparation Tips
Skills evaluated in this interview
Selected
(2 Questions)
- Q1. Previous work experience discussed
- Q2. Key technical skills
(1 Question)
- Q1. Project discussion
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