50+ TCS Interview Questions and Answers

I will visit various types of shops and convince them to work with Paytm.

• I will visit grocery stores, pharmacies, clothing stores, and other retail shops.

• I will explain the benefits of using Paytm for their business, such as easy payment processing and increased customer base.

• I will offer them incentives, such as cashback offers and discounts, to encourage them to sign up with Paytm.

• I will provide them with training and support to ensure they are comfortable using Paytm.

• I wil...read more

To sell a new product in the market, it is important to understand the target audience, create a compelling value proposition, utilize effective marketing strategies, and build strong relationships with customers.

• Conduct market research to identify the target audience and their needs

• Develop a unique value proposition that highlights the benefits and advantages of the new product

• Create a comprehensive marketing plan that includes online and offline channels

• Utilize social media...read more

Rearrange array with negative numbers at the beginning

• Iterate through the array and move negative numbers to the beginning

• Use two pointers approach to swap elements

• Maintain the order of negative numbers while shifting them to the beginning

Use SQL query with GROUP BY and HAVING clause to identify and delete duplicate rows.

• Use GROUP BY clause to group rows with same values

• Use HAVING clause to filter out groups with count greater than 1

• Use DELETE statement to remove duplicate rows

Minimum number of platforms required for a railway station depends on the maximum number of trains arriving and departing at the same time.

• Calculate the maximum number of trains arriving and departing at the same time.

• Determine the time intervals for each train's arrival and departure.

• Add extra platforms for buffer and unexpected delays.

• Consider factors like train length, frequency, and scheduling conflicts.

• Example: If 5 trains arrive and 4 depart at the same time, at least 9...read more

Qualifier is used to specify which bean to autowire, while Autowired is used to automatically wire the bean.

• Qualifier is used to resolve ambiguity when multiple beans of the same type are present in the context.

• Autowired is used to automatically inject the dependency by type.

• Qualifier is used in conjunction with Autowired to specify the bean to be injected.

To sell our product to the customer, we need to understand their needs, highlight the benefits of our product, and provide excellent customer service.

• Research and understand the customer's needs and pain points

• Highlight the unique features and benefits of our product

• Tailor the sales pitch to address the customer's specific needs

• Provide excellent customer service and support throughout the sales process

• Offer competitive pricing and incentives

• Build trust and credibility with th...read more

A simple program using multithreading can be implemented to demonstrate parallel execution of tasks.

• Create a class that implements the Runnable interface in Java.

• Override the run() method to define the task that will run in a separate thread.

• Create instances of the class and start them using the Thread class.

• Use synchronization mechanisms like locks or semaphores to manage shared resources in a thread-safe manner.

Design a notification system for WhatsApp

• Use push notifications for real-time updates

• Implement message queue for reliable delivery

• Allow users to customize notification settings

• Utilize web sockets for instant messaging

• Consider implementing read receipts for messages

I have extensive experience working on SQL and Excel.

• Proficient in writing complex SQL queries for data extraction and manipulation

• Expertise in data analysis and visualization using Excel

• Experience in creating dashboards and reports using Excel

• Familiarity with advanced Excel functions such as VLOOKUP, Pivot tables, etc.

Java Collections API provides a set of classes and interfaces to store and manipulate collections of objects.

• Includes interfaces like List, Set, and Map for different types of collections

• Provides classes like ArrayList, HashSet, and HashMap for implementing collections

• Offers utility classes like Collections for common operations on collections

• Introduced in Java 2 and has been expanded in subsequent versions

I can work with Plante Sparks to develop new business opportunities and lead a team to achieve growth and success.

• Develop strategic partnerships and alliances to expand market reach

• Implement innovative sales and marketing strategies to increase revenue

• Lead and motivate a team to achieve targets and exceed expectations

Where clause is used to filter rows based on a condition, while having clause is used to filter groups based on a condition.

• Where clause is used with SELECT, UPDATE, DELETE statements.

• Having clause is used with GROUP BY clause.

• Where clause filters rows before grouping, while having clause filters groups after grouping.

• Where clause can use any comparison operator, while having clause can only use aggregate functions.

• Example: SELECT * FROM table WHERE column = 'value';

• Example: ...read more

The three stages of money laundering are placement, layering, and integration.

• Placement involves introducing illegal funds into the financial system, often through small transactions to avoid detection.

• Layering involves moving the funds through a series of complex financial transactions to make tracing difficult.

• Integration involves reintroducing the laundered funds into the legitimate economy, often through investments or purchases.

Plante sparks is a process used in business development to generate new ideas and strategies.

• Plante sparks involves brainstorming sessions with team members to come up with innovative solutions.

• It focuses on sparking creativity and thinking outside the box.

• The process may include market research, competitor analysis, and customer feedback.

• Team leads play a crucial role in guiding and facilitating the Plante sparks process.

• Successful implementation of Plante sparks can lead to...read more

I would like to see creativity, collaboration, and innovation in plant sparks.

• Creativity in coming up with new ideas for plant-based products or services

• Collaboration among team members to brainstorm and execute plans effectively

• Innovation in finding unique solutions to challenges in the plant-based industry

The process of preparation involves planning, organizing, and gathering necessary resources to achieve a specific goal.

• Identify the goal or objective of the preparation

• Create a detailed plan outlining the steps to be taken

• Gather necessary resources such as information, materials, and team members

• Allocate tasks and responsibilities to team members

• Set deadlines and milestones to track progress

• Regularly review and adjust the preparation process as needed

Exception handling in polymorphism involves handling exceptions that may occur in overridden methods.

• In polymorphism, a subclass method can override a superclass method, including exception handling.

• Subclass methods can throw exceptions that are subclasses of the exceptions thrown by the superclass method.

• When calling a method on a superclass reference that points to a subclass object, the subclass method's exception handling will be used.

• It is important to consider the excep...read more

Transaction monitoring is the process of reviewing and analyzing transactions to detect and prevent fraudulent activities.

• Transaction monitoring involves continuously monitoring transactions for any suspicious or unusual activity.

• It helps in identifying patterns and trends that may indicate fraudulent behavior.

• By setting up alerts and thresholds, transaction monitoring can help in detecting and preventing fraud in real-time.

• Examples of transaction monitoring tools include ant...read more

Abstract classes can have both abstract and non-abstract methods, while interfaces can only have abstract methods.

• Abstract classes can have constructors, fields, and non-abstract methods.

• Interfaces can only have abstract methods and constants.

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

• Example: Abstract class - Animal with abstract method 'eat', Interface - Flyable with method 'fly'.

To solve a business issue, identify the problem, gather data, analyze the data, develop a solution, and implement it.

• Identify the specific business issue or problem

• Gather relevant data and information related to the issue

• Analyze the data to identify patterns, trends, and potential causes

• Develop a solution or strategy to address the issue

• Implement the solution and monitor its effectiveness

SQL statements are executed in a specific order to ensure accuracy and efficiency.

• FROM and JOIN clauses are executed first to retrieve data from tables

• WHERE clause is executed next to filter the data

• SELECT clause is executed to retrieve specific columns

• GROUP BY clause is executed to group the data based on specified columns

• HAVING clause is executed to filter the grouped data

• ORDER BY clause is executed to sort the data

• LIMIT clause is executed to limit the number of rows return...read more

Minimizing latency involves optimizing network, server, and application performance.

• Optimize network infrastructure by reducing network hops and using content delivery networks (CDNs)

• Utilize caching mechanisms to store frequently accessed data closer to the user

• Implement load balancing to distribute traffic evenly across servers

• Optimize code and database queries to reduce processing time

• Use asynchronous processing for non-blocking operations

To talk to customers effectively, listen actively, ask open-ended questions, empathize, provide solutions, and follow up.

• Listen actively to understand the customer's needs and concerns.

• Ask open-ended questions to encourage the customer to share more information.

• Empathize with the customer's situation and show understanding.

• Provide tailored solutions that address the customer's specific needs.

• Follow up with the customer to ensure their satisfaction and build long-term relation...read more

Primary key is a unique identifier for each record in a database table.

• Primary key ensures each record in a table is unique

• It can consist of one or multiple columns

• Primary key values cannot be NULL

Yes, I am able to work in the field.

• I have previous experience working in the field as a sales representative for XYZ company.

• I am comfortable with traveling and working independently.

• I have a valid driver's license and reliable transportation.

• I am able to adapt to different environments and work under pressure.

• I am willing to work flexible hours to meet the needs of the job.

Different types of joins are inner join, left join, right join, and full outer join.

• Inner join returns only the matching rows from both tables

• Left join returns all the rows from the left table and matching rows from the right table

• Right join returns all the rows from the right table and matching rows from the left table

• Full outer join returns all the rows from both tables, with NULL values in the columns where there is no match

• Join types can be specified using keywords such a...read more

I have a Bachelor's degree in Business Administration and a Master's degree in Finance.

• Bachelor's degree in Business Administration

• Master's degree in Finance

A palindrome is a word, phrase, number, or other sequence of characters that reads the same forward and backward.

• Create a function that takes a string as input

• Remove all non-alphanumeric characters and convert to lowercase

• Compare the original string with its reverse to check if it's a palindrome

UPI and IMPS are both electronic payment systems in India, but UPI allows for instant transfers between bank accounts while IMPS operates on a batch processing system.

• UPI stands for Unified Payments Interface and allows for instant fund transfers 24/7, even on holidays.

• IMPS stands for Immediate Payment Service and operates on a batch processing system with scheduled settlement times.

• UPI transactions can be initiated using a virtual payment address (VPA) or a mobile number lin...read more

To file TDS return, one needs to register on the income tax e-filing website and submit the return online.

• Register on the income tax e-filing website

• Download the required TDS return form

• Fill in the details and validate the form

• Upload the form on the website

• Submit the form and generate an acknowledgement receipt

Different types of digital banks include neobanks, challenger banks, and traditional banks with digital offerings.

• Neobanks: digital-only banks that operate without physical branches

• Challenger banks: digital banks that challenge traditional banks with innovative products and services

• Traditional banks with digital offerings: established banks that offer digital banking services alongside their traditional offerings

• Examples: Neobanks - Chime, Revolut, N26; Challenger banks - All...read more

KYC stands for Know Your Customer, a process used by financial institutions to verify the identity of their clients.

• KYC is a regulatory requirement to prevent money laundering and fraud.

• It involves collecting personal information such as name, address, and identification documents.

• KYC also includes verifying the source of funds and assessing the risk associated with a customer.

• Failure to comply with KYC regulations can result in penalties for financial institutions.

• Examples o...read more

Design data modelling and flow for IRCTC.

• Identify entities like trains, stations, passengers, bookings, payments, etc.

• Create a database schema with tables for each entity and their attributes.

• Establish relationships between tables using foreign keys.

• Implement data validation and constraints to ensure data integrity.

• Design a flow for booking tickets, making payments, and generating tickets.

• Ensure data security and privacy by implementing access controls and encryption.

• Use data...read more

Left join is a type of join operation in SQL that returns all rows from the left table and matching rows from the right table.

• Left join combines rows from two tables based on a related column between them.

• If there is no match in the right table, NULL values are returned for the columns of the right table.

• Example: SELECT * FROM table1 LEFT JOIN table2 ON table1.id = table2.id;

I changed domains to pursue new challenges and opportunities for growth.

• Seeking new challenges and opportunities for personal and professional growth

• Interest in exploring different industries or sectors

• Acquiring new skills and knowledge in a different domain

• Passion for a specific field or industry

• Opportunity for career advancement or higher salary potential

KYC is compulsory to prevent fraud and money laundering.

• KYC helps to verify the identity of customers and ensure they are not involved in illegal activities.

• It helps to build trust between customers and financial institutions.

• KYC is mandatory by law in many countries to prevent financial crimes.

• It also helps to reduce the risk of identity theft and other fraudulent activities.

• Examples of KYC documents include passport, driver's license, and utility bills.

Paytm is a leading Indian digital wallet and e-commerce platform.

• Paytm has over 350 million registered users and offers a range of services including mobile recharges, bill payments, and online shopping.

• It has also expanded into financial services such as loans, insurance, and investments.

• Paytm has faced some controversies in the past, including allegations of data privacy violations and anti-competitive practices.

• However, it remains a popular and widely used platform in Indi...read more

The CEO of Paytm is Vijay Shekhar Sharma.

• Vijay Shekhar Sharma founded Paytm in 2010.

• He is a self-made billionaire and one of the youngest Indian entrepreneurs.

• Under his leadership, Paytm has become one of the leading digital payment platforms in India.

• Sharma has also been recognized with numerous awards for his contributions to the Indian startup ecosystem.

TDS rates have been revised recently

• TDS rates for non-salaried individuals reduced by 25%

• TDS rates for rent payments reduced to 3.75%

• TDS rates for professional fees reduced to 7.5%

• TDS rates for dividend income increased to 10%

• TDS rates for e-commerce transactions introduced at 1%

• Effective from 14th May 2020

CDD stands for Customer Due Diligence and EDD stands for Enhanced Due Diligence.

• CDD is a process to verify the identity of customers and assess the risks associated with them.

• EDD is a more thorough investigation conducted for high-risk customers or transactions.

• CDD involves collecting basic customer information and conducting risk assessments.

• EDD involves gathering additional information, such as source of funds, beneficial ownership, and politically exposed persons (PEPs).

Create a stopwatch in React js

• Use state to keep track of time

• Use setInterval to update time every second

• Display time in HH:MM:SS format

I will generate revenue by implementing strategic sales plans, building strong relationships with clients, and identifying new business opportunities.

• Developing and executing sales strategies to meet revenue targets

• Building and maintaining relationships with key clients

• Identifying and pursuing new business opportunities

• Monitoring market trends and competitor activities

• Training and motivating sales team to drive revenue growth