Infosys Technical Lead Interview Questions, Process, and Tips

Q1. Bigquery architecture
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Q2. Real time scenario questions
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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
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Q2. Cloud migration challenges
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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
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Q1. Salary discussion
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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
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Q1. JavaScript promises async
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Q2. Angular basics components directives forms interceptor services
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Q1. Scenario based questions
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Q2. Signal new feature
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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
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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
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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
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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)
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Q2. Decorator with example code
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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.
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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
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Q4. Aws services, more on lambda processing, events , context
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Q1. General team handling skills
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Q2. In case of absentees in the team and end date is nearing means how you would communicate with stakeholders and completion strategy
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Coding questions from leetcode. 15 minutes to solve

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...read more
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Q2. Pure and impure pipes in Angular
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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,
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Q1. Previous work experience discussed
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Q2. Key technical skills
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Q1. Project discussion
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Q1. Explain your prep experience
Ans. 
I have prepared for the Tech Lead role by gaining experience in leading technical projects, improving my communication skills, and staying updated on industry trends.
• Led technical projects at previous companies

• Improved communication skills through presentations and team collaborations

• Stayed updated on industry trends by attending conferences and online courses
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Q2. Explain clustered and non clustered index
Ans. 
Clustered index physically reorders the data in the table, while non-clustered index creates a separate structure.
• Clustered index determines the physical order of data rows in a table.

• Non-clustered index creates a separate structure to store the index data.

• Clustered index is faster for retrieval but slower for inserts and updates.

• Non-clustered index is slower for retrieval but faster for inserts and updates.
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