50+ TCS Interview Questions and Answers

Different computer platforms include Windows, macOS, Linux, and mobile platforms like iOS and Android.

• Windows is a popular computer platform developed by Microsoft.

• macOS is the operating system used on Apple computers.

• Linux is an open-source platform that is widely used in servers and embedded systems.

• iOS is the mobile platform used on Apple devices.

• Android is the mobile platform used on a variety of devices from different manufacturers.

No

• I am not familiar with your software

• I have not used it before

Design a Least Recently Used (LRU) cache data structure that supports get and put operations with capacity constraint.

• Use a combination of hashmap and doubly linked list to implement the LRU cache.

• Keep track of the least recently used item and evict it when the cache reaches its capacity.

• Update the position of an item in the cache when it is accessed or updated.

• Handle both get and put operations efficiently to maintain the LRU property.

• Ensure the time complexity of get and pu...read more

Reverse a given stack of integers using recursion without using extra space or loops.

• Use recursion to pop all elements from the original stack and store them in function call stack.

• Once the stack is empty, push the elements back in reverse order using recursion.

• Make use of the top(), pop(), and push() stack methods provided.

• Example: If the input stack is [1, 2, 3], after reversal it should be [3, 2, 1].

Find the node where two linked lists merge, return -1 if no merging occurs.

• Traverse both lists to find the lengths and the last nodes

• Align the starting points of the longer list with the shorter list

• Traverse both lists simultaneously until a common node is found

Find the subarray with maximum sum in an array, considering length if sums are equal.

• Iterate through the array and keep track of the maximum sum subarray seen so far

• Consider the length of subarrays if the sums are equal to determine the maximum subarray

• Handle edge cases like negative numbers in the array

Convert a binary tree to its mirror tree by interchanging left and right children of all non-leaf nodes.

• Traverse the binary tree in a recursive manner.

• Swap the left and right children of each non-leaf node.

• Continue this process until all nodes have been processed.

Reverse words in a string while handling leading, trailing, and multiple spaces.

• Split the input string by spaces to get individual words

• Reverse the order of the words

• Join the reversed words with a single space in between

• Handle leading, trailing, and multiple spaces appropriately

Remove the Kth node from the end of a singly linked list.

• Use two pointers approach to find the Kth node from the end.

• Handle edge cases like removing the head node or removing the last node.

• Update the pointers to remove the Kth node and reconnect the list.

The task is to determine the minimum number of platforms required at a railway station so that no train has to wait.

• Sort the arrival and departure times arrays in ascending order.

• Initialize two pointers, one for arrival and one for departure.

• Increment the platform count when a train arrives and decrement when it departs.

• Keep track of the maximum platform count needed.

• Return the maximum platform count as the minimum number of platforms needed.

Reverse a given singly linked list by changing the links between nodes.

• Iterate through the linked list and reverse the links between nodes

• Use three pointers to keep track of the current, previous, and next nodes

• Update the links between nodes to reverse the list

• Return the head of the reversed linked list

Reverse a stack using recursion without using any extra space other than the internal stack space.

• Use recursion to pop all elements from the original stack and store them in function call stack.

• Once the stack is empty, push the elements back in reverse order.

• Base case of recursion should be when the original stack is empty.

To handle an irritated user/customer, listen actively, empathize, apologize, offer a solution, and follow up.

• Listen actively to understand their concerns and frustrations.

• Empathize with their emotions and acknowledge their feelings.

• Apologize sincerely for any inconvenience caused.

• Offer a solution or alternative to address their issue.

• Follow up to ensure their satisfaction and resolve any remaining concerns.

I have a strong capacity to control my mind.

• I have developed mindfulness techniques to control my thoughts and emotions.

• I practice meditation regularly to improve my focus and concentration.

• I have learned to identify and challenge negative thought patterns.

• I use positive affirmations and visualization techniques to maintain a positive mindset.

• I have the ability to redirect my thoughts and stay calm in stressful situations.

One of your software is called SocialMediaPro. It is used for managing and analyzing social media accounts.

• SocialMediaPro is a comprehensive social media management tool.

• It allows users to schedule and publish posts across multiple social media platforms.

• The software provides analytics and reporting features to track the performance of social media campaigns.

• It also offers social listening capabilities to monitor brand mentions and engage with followers.

• SocialMediaPro helps b...read more

Yes, I have information about your software.

• I have researched your software extensively.

• I am familiar with its features and functionalities.

• I have used your software in previous projects.

• I have read reviews and feedback about your software.

Software is a set of instructions or programs that enable a computer to perform specific tasks or functions.

• Software is a collection of code written in programming languages.

• It is used to control and manage hardware devices and perform various tasks.

• Software can be categorized into system software, application software, and programming software.

• Examples of software include operating systems like Windows or macOS, web browsers like Chrome or Firefox, and productivity tools lik...read more

Abstract class is a class that cannot be instantiated, while interface is a contract that defines methods.

• Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.

• Abstract class can have instance variables, while interface cannot.

• Abstract class is used for code reusability and polymorphism, while interface is used for achieving abstraction and loose coupling.

• In service layer, interface is used to define the contract betwee...read more

Yes, I have hands-on practice with your software.

• I have used your software extensively in my previous role as a Social Media Manager.

• I am familiar with all the features and functionalities of your software.

• I have successfully implemented social media campaigns using your software.

• I have also provided training to team members on how to use your software effectively.

The impact of social media on society

• Social media has revolutionized communication and connectivity

• It has transformed the way people interact and share information

• Social media has both positive and negative effects on society

• Examples include the spread of fake news, cyberbullying, and online activism

• It has also facilitated global movements and provided a platform for marginalized voices

I once stayed after hours to help a customer with a complex issue.

• Customer was having trouble with a software program

• I stayed an extra hour to troubleshoot the issue

• I was able to resolve the problem and the customer was very grateful

I will highlight the unique features and benefits of the product to the customer.

• I will start by understanding the customer's needs and requirements.

• Then, I will explain how our product can fulfill those needs and provide solutions.

• I will highlight the unique features and benefits of the product, such as its durability, efficiency, and cost-effectiveness.

• I will also provide examples of how our product has helped other customers in similar situations.

• Lastly, I will offer any a...read more

To make sales and promote high-value average transaction, I focus on building relationships, understanding customer needs, and offering personalized solutions.

• Build relationships with customers to gain their trust and loyalty

• Understand customer needs by asking questions and actively listening to their responses

• Offer personalized solutions that meet their specific needs and preferences

• Highlight the value of the product or service being offered

• Provide excellent customer service...read more

Different computer platforms include Windows, macOS, Linux, and mobile platforms like iOS and Android.

• Windows is a popular computer platform developed by Microsoft.

• macOS is the operating system used on Apple computers.

• Linux is an open-source platform used by many computer users.

• Mobile platforms like iOS and Android are used on smartphones and tablets.

MVC life cycle, AJAX call and passing data from view to partial view.

• MVC life cycle includes request routing, controller instantiation, action execution, and rendering of the view.

• AJAX call is initiated by sending an HTTP request to the server and receiving a response in the form of JSON or XML data.

• To pass data from one view to a partial view, we can use ViewBag, ViewData, or TempData.

• ViewBag is a dynamic object that allows us to add properties to it and access them in the v...read more

A pac file is a configuration file used by web browsers to automatically choose the appropriate proxy server for a given URL.

• Pac file stands for Proxy Auto-Configuration file.

• It contains JavaScript functions that define the rules for choosing a proxy server based on the URL being accessed.

• Pac files are used by web browsers to automatically select the most suitable proxy server for a given URL.

• Pac files can be hosted on a web server and referenced by browsers to dynamically up...read more

The best marketing field for a future tech company would be digital marketing.

• Digital marketing allows for targeted advertising and reaching a wider audience

• Social media platforms like Facebook, Instagram, and Twitter are great for promoting tech products

• Search engine optimization (SEO) can help improve visibility on search engines like Google

• Email marketing can be used to nurture leads and keep customers engaged

• Content marketing can establish a company as a thought leader in...read more

A browser is a software application used to access and view websites on the internet.

• A browser is a program that retrieves and displays web pages.

• It interprets HTML code and renders it as a visual representation.

• Browsers allow users to navigate through websites and interact with web content.

• Examples of browsers include Google Chrome, Mozilla Firefox, Safari, and Microsoft Edge.

Global warming is causing rising temperatures, melting ice caps, extreme weather events, and disruptions to ecosystems.

• Rising temperatures leading to heatwaves and droughts

• Melting ice caps causing sea level rise

• Extreme weather events like hurricanes and wildfires becoming more frequent

• Disruptions to ecosystems leading to loss of biodiversity

Tech support involves providing assistance with technical issues while troubleshooting is the process of identifying and resolving problems.

• Tech support involves providing assistance to customers who are experiencing technical issues with a product or service.

• Troubleshooting is the process of identifying and resolving problems that are preventing a product or service from functioning properly.

• Tech support and troubleshooting can involve a variety of tasks, such as diagnosing ...read more

The minimum number of platforms required in a railway station depends on factors like the number of trains, frequency of trains, and passenger traffic.

• Number of trains running through the station

• Frequency of trains stopping at the station

• Passenger traffic at the station

• Types of trains (local, express, etc.)

• Possibility of future expansion or addition of new train services

Our software includes Social Media Analytics Tool, Social Listening Platform, and Social Media Monitoring Software.

• Social Media Analytics Tool

• Social Listening Platform

• Social Media Monitoring Software

Reverse words in a string without changing the input string and without using extra memory

• Iterate through the string and find the start and end indices of each word

• Reverse each word in place by swapping characters

• Reverse the entire string by swapping characters again

Software is a collection of programs, data, and instructions that tell a computer how to perform specific tasks.

• Software is intangible and consists of code written in programming languages.

• It includes applications, operating systems, and utilities.

• Examples of software include Microsoft Word, Photoshop, and Windows OS.

• Software can be customized, upgraded, and updated to improve functionality.

• It enables computers to perform various tasks efficiently and automate processes.

BPO is the practice of hiring another company to handle business activities that a company cannot perform efficiently on its own.

• BPO involves outsourcing non-core business functions such as customer service, accounting, and human resources.

• Companies outsource to reduce costs, improve efficiency, and focus on core competencies.

• Examples of BPO include call centers, payroll processing, and data entry services.

Long term goals are aspirations that you want to achieve in the future, while short term goals are objectives that you aim to accomplish in the near future.

• Long term goals are usually set for a period of 5 years or more.

• They are often broader in scope and require significant planning and effort.

• Examples of long term goals include career advancement, starting a family, or buying a house.

• Short term goals are typically set for a period of less than a year.

• They are more specific ...read more

I will establish clear guidelines, disclose any potential conflicts, and prioritize the best interest of the organization.

• Establish clear guidelines and policies regarding conflict of interest

• Encourage open communication and disclosure of any potential conflicts

• Prioritize the best interest of the organization over personal interests

• Recuse myself from decision-making processes where a conflict exists

• Seek advice from a higher authority or ethics committee if unsure how to proce...read more

I will ensure DHCP servers are redundant and have failover mechanisms in place to maintain network connectivity.

• Implementing DHCP server clustering for automatic failover

• Configuring DHCP split scopes for load balancing

• Utilizing DHCP relay agents to ensure DHCP requests are forwarded to multiple servers

• Regularly monitoring DHCP server performance and availability

Yes, I have knowledge on Ms Excel.

• I am proficient in using Excel for data entry, analysis, and reporting.

• I am familiar with various functions and formulas in Excel.

• I have experience in creating charts and graphs in Excel.

• I can use Excel to manage and organize large amounts of data.

• I am comfortable with using Excel shortcuts to increase efficiency.

Reverse a linked list and find number of characters in a string.

• To reverse a linked list, we can iterate through the list and change the pointers to reverse the order.

• To find the number of characters in a string, we can use the length property or iterate through the string and count the characters.

• For example, to reverse a linked list:

• Node* prev = NULL; Node* current = head; Node* next = NULL; while (current != NULL) { next = current->next; current->next = prev; prev = curre...read more

AD replication is the process of copying changes in Active Directory from one domain controller to another.

• AD replication ensures that all domain controllers in a network have consistent and up-to-date information.

• Replication occurs between domain controllers within the same site or between sites.

• Site topology defines the replication connections between sites and helps optimize replication traffic.

• Bridgehead servers are designated domain controllers responsible for inter-site...read more

A customer service support executive is responsible for providing assistance and resolving customer queries and issues through email communication.

• Responding to customer inquiries and providing accurate and timely information

• Resolving customer complaints and issues effectively

• Assisting customers with product or service-related questions

• Providing technical support and troubleshooting assistance

• Ensuring customer satisfaction and maintaining a positive customer experience

• Managin...read more

Customer service involves providing assistance and support to customers to ensure their satisfaction and resolve any issues they may have.

• Customer service is about understanding and meeting the needs of customers

• It involves effective communication and problem-solving skills

• Customer service representatives should be knowledgeable about the products or services they are supporting

• They should be empathetic and patient when dealing with customer concerns

• Customer service can be pr...read more

Testing fluency of English involves assessing a person's ability to speak, read, write, and understand English proficiently.

• Assess speaking skills through conversation or presentations

• Evaluate reading comprehension with passages or articles

• Test writing abilities with essays or reports

• Check listening skills with audio recordings or conversations

Salep Enterdacoti is a product we offer to our customers. Our goal is to provide excellent customer service and ensure customer satisfaction.

• Salep Enterdacoti is a popular product among our customers

• Our goal is to provide prompt and efficient customer service

• We aim to ensure customer satisfaction by addressing their concerns and providing solutions

• We strive to build long-term relationships with our customers by providing quality products and services

Customer service is the assistance and support provided to customers before, during, and after a purchase.

• Customer service involves addressing customer queries and concerns promptly and efficiently.

• It includes providing information about products or services, handling complaints, and resolving issues.

• Good customer service can lead to customer loyalty and positive word-of-mouth marketing.

• Examples of good customer service include personalized interactions, timely responses, and...read more

Reverse words in a string

• Split the string into words

• Reverse each word individually

• Join the reversed words back together

BPO stands for Business Process Outsourcing. It involves contracting non-core business functions to a third-party provider.

• BPO is a cost-effective way for companies to outsource non-core functions such as customer service, data entry, and back-office operations.

• BPO providers are typically located in countries with lower labor costs, such as India and the Philippines.

• BPO services can be categorized into two types: voice-based and non-voice-based.

• Examples of BPO companies inclu...read more

The importance of cybersecurity in today's digital age

• Cybersecurity is crucial to protect sensitive data and prevent cyber attacks

• Companies and individuals must take proactive measures to secure their networks and devices

• Examples of cyber attacks include phishing, malware, and ransomware

• Cybersecurity professionals play a vital role in identifying and mitigating potential threats

BPO stands for Business Process Outsourcing.

• BPO involves contracting out specific business functions to a third-party service provider.

• Common BPO services include customer support, accounting, and human resources.

• BPO can help companies save costs and improve efficiency.

• Examples of BPO companies include Accenture, IBM, and Infosys.

The mirror image of a tree would be a reflection of the tree's shape and features.

• Mirror image would show the tree's branches and leaves reversed horizontally.

• The trunk of the tree would be mirrored as well.

• Reflection in water or a mirror can show the tree's mirror image.

Reversing a stack without using extra space

• Use recursion to pop all elements from the stack and insert them at the bottom

• Repeat the process until all elements are reversed in place

• Time complexity is O(n^2) and space complexity is O(n) due to recursion

BPO stands for Business Process Outsourcing, which involves contracting a third-party service provider to handle specific business processes.

• BPO is a common practice in industries such as customer service, finance, and healthcare.

• It allows companies to focus on their core competencies while outsourcing non-core processes.

• BPO services can include data entry, customer support, accounting, and more.

• Examples of BPO companies include Accenture, IBM, and Infosys.