TCS Interview Questions, Process, and Tips

Qualitative Reasoning

Coding Questions with Multiple Languages Option

Q1. General Awareness
Ans. Company policy and view on it.
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A substantial focus on CAT and CMAT level aptitudes is necessary, with an emphasis on covering all topics comprehensively.

Practicing 50 questions on HackerRank and having adequate SQL-related knowledge is sufficient.

Q1. Can you introduce yourself, detailing your final year project, internship work experience, and preferred programming language?
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Q2. Java opps concepts with written code example in code, basic dsa like sort , search etc. SQL joins , DBMS concepts. Manager asked about problem faces in internship and how it resolved.
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Q3. Explain about sort using python
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Sorting in Python can be done using built-in functions like sorted() or sort() method.
• Use sorted() function to return a new sorted list without modifying the original list.

• Use sort() method to sort the list in-place.

• You can specify key function to customize the sorting order.

• Example: nums = [3, 1, 4, 1, 5, 9, 2]; sorted_nums = sorted(nums); nums.sort()
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Q4. ML project example
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Developed a machine learning model to predict customer churn in a telecom company.
• Collected and cleaned customer data including usage patterns and demographics.

• Used classification algorithms like Random Forest and Logistic Regression to train the model.

• Evaluated model performance using metrics like accuracy, precision, and recall.

• Implemented the model in a production environment to monitor and predict customer churn.
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Q5. Explain web api concepts
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Web API concepts involve creating interfaces for communication between different software systems over the internet.
• Web API stands for Application Programming Interface, which allows different software systems to communicate with each other over the internet.

• Web APIs use HTTP protocols to define a set of rules for communication between systems.

• Web APIs can be used to access data, services, or functionality from a remot...read more
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Q6. Explain how to connect DB with API
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To connect a database with an API, you need to establish a connection between the database and the API server.
• Create an API endpoint that will handle database operations such as CRUD (Create, Read, Update, Delete) operations.

• Use database drivers or ORM (Object-Relational Mapping) libraries to interact with the database from the API code.

• Establish a secure connection between the API server and the database by configurin...read more
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Q1. What are your location preferences and how flexible are you with working arrangements?
Ans. 
I am open to various location preferences and flexible with working arrangements.
• I am open to relocating for the right opportunity

• I am open to remote work or flexible work hours

• I am willing to travel for work if required
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The online assessment included Leetcode easy questions

Q1. The Face to Face interview included Java core questions
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Q1. C c++ Java Development questions
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English and aptitude

Opps concept and loops

Q1. Technical skills
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Q1. Regarding personal responsibility’s
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Q1. What are angular life cycle?
Ans. 
Angular lifecycle hooks are methods that get called at specific stages of a component's life.
• There are eight lifecycle hooks in Angular

• ngOnInit() is called after the component is initialized

• ngOnChanges() is called when the component's input properties change

• ngDoCheck() is called during every change detection cycle

• ngAfterViewInit() is called after the component's view has been initialized

• ngOnDestroy() is called just bef
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Q2. Explain different directives
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Directives are instructions given to the compiler to perform specific tasks during compilation.
• There are different types of directives such as include, define, pragma, and ifdef

• Include directive is used to include header files in the program

• Define directive is used to define constants or macros

• Pragma directive is used to provide additional information to the compiler

• Ifdef directive is used to check if a particular macr
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Q3. Difference between template driven and reactive form
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Template driven forms are based on directives while reactive forms are based on reactive programming.
• Template driven forms are easier to use and require less code.

• Reactive forms are more flexible and allow for more complex validation.

• Template driven forms are suitable for simple forms while reactive forms are better for complex forms.

• Template driven forms use two-way data binding while reactive forms use observable str...read more
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Q4. How does angular application starts
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Angular application starts by bootstrapping the AppModule.
• Angular application is a single page application that runs in the browser.

• The AppModule is the root module of the application.

• The AppModule is bootstrapped by calling the bootstrapModule method in main.ts file.

• The bootstrapModule method creates an instance of the AppModule and starts the application.
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Q5. Core constructs of angular
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Angular has core constructs like components, modules, services, directives, pipes, and templates.
• Components are the building blocks of Angular applications.

• Modules are used to organize the application into cohesive blocks of functionality.

• Services are used to share data or functionality across components.

• Directives are used to add behavior to an existing DOM element or create a new one.

• Pipes are used to transform data ...read more
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Q6. Auth guards in angular
Ans. 
Auth guards in Angular are used to protect routes from unauthorized access.
• Auth guards are used to check if a user is authenticated before allowing access to a route.

• They can also be used to check if a user has certain permissions before allowing access.

• Angular provides built-in auth guards like CanActivate, CanActivateChild, CanLoad, and CanDeactivate.

• Custom auth guards can also be created by implementing the CanActiv...read more
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Q7. Rxjs operators in angular
Ans. 
RxJS operators are used in Angular to handle asynchronous data streams.
• Operators are functions that manipulate the data streams

• They can be used for filtering, mapping, reducing, and more

• Common operators include map, filter, switchMap, and mergeMap
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Q1. Tell me about yourself
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Q2. Was there any delay while completing your previous tasks? how did you complete that task?
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