TCS Communications Interview Questions and Answers

Java stream API filter function is used to select elements based on a given predicate.

• Use filter() method to apply a predicate to each element in the stream

• Predicate should return true for elements to be included in the resulting stream

• Example: List<String> names = Arrays.asList("Alice", "Bob", "Charlie"); List<String> filteredNames = names.stream().filter(name -> name.startsWith("A")).collect(Collectors...read more

In 3 years, I see myself as a senior developer leading a team on innovative projects.

• Leading a team on innovative projects

• Senior developer role

• Continuing to learn and grow in my career

My hobbies include hiking, photography, and playing the guitar.

• Hiking: I enjoy exploring nature trails and challenging myself with different terrains.

• Photography: I love capturing moments and scenes that inspire me.

• Playing the guitar: I find relaxation and creativity in playing music.

A mapplet is a reusable object in Informatica PowerCenter that contains a set of transformations.

• Mapplets can be used in multiple mappings to perform the same set of transformations.

• They can simplify mapping development by encapsulating common logic.

• Mapplets can have input and output ports to connect with other transformations.

Hive is a data warehouse infrastructure built on top of Hadoop for providing data summarization, query, and analysis.

• Hive is used for managing and querying large datasets stored in Hadoop Distributed File System (HDFS).

• It provides a SQL-like interface called HiveQL for querying data.

• Hive organizes data into tables, partitions, and buckets to optimize queries.

• It supports custom MapReduce scripts for complex data process...read more

Look up is used to retrieve data from a single source, while joiner is used to combine data from multiple sources.

• Look up is used to search for a value in a data source and return a corresponding value from the same row.

• Joiner is used to combine data from two or more sources based on a common key.

• Look up is used for one-to-one mapping, while joiner is used for many-to-one or one-to-many mapping.

SCD2 logic in Informatica is used to track historical changes in data by creating new records for each change.

• SCD2 stands for Slowly Changing Dimension Type 2

• It involves creating new records for each change in data, while maintaining a link to the previous record

• It typically includes effective start and end dates to track the validity of each record

• SCD2 logic is commonly used in data warehousing to maintain historical ...read more

Router transformation sends data to multiple targets based on conditions, while filter transformation filters rows based on conditions.

• Router transformation can send data to multiple targets based on conditions

• Filter transformation filters rows based on conditions

• Router transformation can be used to route data to different tables based on certain criteria

• Filter transformation can be used to remove unwanted rows from th...read more

My goals include continuous learning, contributing to impactful projects, and advancing my career in software development.

• Pursue certifications in cloud technologies, such as AWS or Azure, to enhance my skills.

• Contribute to open-source projects to gain experience and collaborate with other developers.

• Aim for a leadership role in the next few years to mentor junior developers and lead projects.

My goals include continuous learning, contributing to impactful projects, and advancing my career in software development.

• Pursue certifications in relevant technologies, such as AWS or Azure, to enhance my skill set.

• Contribute to open-source projects to gain experience and collaborate with other developers.

• Aim for a leadership role in the next few years, where I can mentor junior developers and lead projects.

• Stay updat...read more

My goals as a software developer include continuous learning, contributing to impactful projects, and advancing my career in technology.

• Continuous Learning: I aim to stay updated with the latest technologies, such as AI and cloud computing, by taking online courses.

• Contributing to Open Source: I plan to contribute to open-source projects to enhance my skills and collaborate with other developers.

• Career Advancement: I a...read more

I embrace criticism as a growth opportunity, using it to improve my skills and enhance my contributions to the team.

• Listen actively to understand the feedback without becoming defensive.

• Ask clarifying questions to gain deeper insights into the criticism.

• Reflect on the feedback and identify actionable steps for improvement.

• Seek feedback regularly to create a culture of open communication.

• For example, after receiving cod...read more

I am motivated by challenges, continuous learning, and the impact my work has on users and the team.

• I thrive on solving complex problems, like optimizing algorithms to improve application performance.

• Continuous learning drives me; I regularly take online courses to stay updated with new technologies.

• I find motivation in teamwork, collaborating with colleagues to create innovative solutions.

• Seeing the positive impact of...read more

I tend to be overly critical of my work, which can slow down my progress and affect my confidence in delivering projects.

• I often spend too much time refining code, aiming for perfection, which can lead to missed deadlines.

• In team settings, I sometimes hesitate to share my ideas, fearing they may not be good enough, which can limit collaboration.

• I have a tendency to take on too many tasks at once, thinking I can manage ...read more

I bring a unique blend of technical skills, problem-solving abilities, and a passion for innovation that aligns with your team's goals.

• Proven experience in developing scalable applications, such as a recent project where I improved load times by 30%.

• Strong proficiency in multiple programming languages, including Python and Java, which allows me to adapt to various project needs.

• Excellent teamwork and communication skil...read more

The output will be 'result'

• The logical OR operator (||) returns the first truthy value it encounters

• In this case, '0' is falsy, 'false' is falsy, and 'result' is truthy

• Therefore, the output will be 'result'

useState is used in React functional components to manage state and trigger re-renders.

• useState allows functional components to have stateful logic.

• Using variables directly in functional components does not trigger re-renders.

• useState provides a way to update state and trigger component updates.

• useState preserves the state between re-renders.

• Example: const [count, setCount] = useState(0);