Tata Consultancy Services (TCS) is a well-recognized and established company worldwide. Being a part of this reputed firm is nothing less than gaining a badge of honor. So, this post will be useful if you are preparing to appear for an interview in this firm. Brought to you by a team of experienced writers at MindMajix, in this article, you can find the latest TCS interview questions with answers. Scroll down to know more.
Tata Consultancy Services (TCS) is a multinational company known for offering IT services and has its headquarters in Mumbai, India. It provides consultancy and software services in diverse industries, such as finance, healthcare, education, life science, insurance, energy, and retail. The company also offers analytics, IoT, blockchain, AI, cyber security, and automation services.
As far as the recruitment process for this company is concerned, it begins and ends with varying rounds. Throughout this process, you will be asked a variety of questions related to yourself, your work experience, your educational background, and more.
Now that you think you are ready to appear for an interview and grab a job at this company, MindMajix has brought a thorough, well-researched list of TCS interview questions in this post. So, without further ado, let’s get started with it.
TCS is one company that continues to hire people throughout the year. They have both off-campus and on-campus drives. Not just that, the organization also conducts several exams each year to hire new candidates, such as:
Generally, the company either conducts one interview where they have one MR session, one HR session, and one technical session. Or, they conduct two different rounds, one for the technical interview and the other for the HR session and MR session. Here is what you need to know about the TCS interview process:
1. Aptitude Test (TCS NQT)
This one is an online exam that is conducted on the platform TCS iON. This exam is divided into two sections, such as
2. Technical Interview
Just as the name suggests, the technical interview round is all about programming and technical questions. Once you have cleared your online exam, you will have to take this round. Herein, you will be asked some of the common questions, for example, about yourself, your past projects, preferred programming languages, and other technical questions concerning varying aspects and topics.
3. Managerial Round
In this round, you will find a few things from the technical round but in a more stringent way. The team of interviewers will be raising questions and doubts on your answers to cross-check whether you are capable of handling stress or not. Once you have reached this round, you must stay confident, calm, and have clear thoughts. Upon clearing this round, you will be sent for the HR round.
4. HR Interview
Once you have cleared the previous round, you will be taken for the HR interview round. As specified, HR will ask you a few basic questions. Throughout this round, you can even put forth questions from your end and clear out doubts if any.
Below are the various main advantages of Python language.
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The Scope is a variable that we can only find inside the region where it is created. We use Scope to locate a name in a specific region of a program.
Scopes are generally implemented as dictionaries that help map names with objects. The dictionaries are known as namespaces.
In Python, there are totally four types of scopes, as depicted below:
The pass statement acts as the placeholder for the future code. Also, it is a null statement.
For example, we may have a loop or function that still needs implementation. But if we intend to implement it in the future, we can use the pass statement to accomplish the same.
‘Self’ is nothing but an instance of a class. We use ‘self’ to access a class's attributes, variables, and methods of objects.
We use self in Python since Python doesn’t use @ syntax to refer to instance attributes.
Dictionary comprehensions help create dictionaries from iterable. They also help transform dictionaries. Python allows the creation of nested dictionary comprehensions.
List comprehensions help to create better lists than 'for' loops. It also allows the creation of lists from the existing lists.
|They are immutable||They are mutable|
|They are faster||The implication of iterations is slow|
|They consume less memory||They consume more memory|
|They rarely occur||Unexpected errors occur frequently|
|They have fewer built-in methods||They have many built-in methods|
We use break statements in Python to terminate a loop and continue executing statements out of the loop. In other words, the program control moves out of the loop once this statement is executed and starts executing the statements that follow the loop. We use this statement for and while loops.
We use past statements to do nothing inside a code block. The codes can be used later. We also use pass statements for exception catching.
Regarding the continue statement, it stops the execution of the current iteration and starts the next iteration. On the other hand, the break statement terminates the loop.
We can create copies of objects in two ways: deep and shallow. A shallow copy makes new objects that store the reference of the original elements.
When it comes to deep copy, it creates new objects. It also makes copies of nested objects present in the original elements.
Python reads codes line by line and throws errors at any stage if it finds them. It also releases results up to the stage it completed execution. Thus, it simplifies debugging process.
Python can run on any platform since it avoids recompiling codes for different platforms. This is another reason for calling Python an interpreted language.
It is a simple but essential note that Python is both a compiled as well as interpreted language.
A class in Python can inherit another class's properties and methods. The parent or base class is the one from which another class inherits the properties. A child class or derived class inherits properties from a parent class.
The following are the prime features of Java.
|Related Article: Java Tutorial|
As the name suggests, the JIT compiler compiles codes just in time or on the fly. JIT compiler is nothing but a component of the runtime environment, which plays a pivotal role in the performance of Java applications. Mainly, it compiles byte codes into native machine codes at runtime. The machine codes can then be sent to processors directly.
ClassLoader is nothing but a part of the Java runtime environment. It loads Java classes into JVM dynamically. There are three types of classloader as follows:
The other access specifiers of Java are listed below:
The this () keyword essentially indicates the current object in a constructor or method. We use this () keyword for many reasons. Here are they:
|It is platform dependent||It is platform independent|
|Memory is managed manually||Memory is system-controlled|
|It is both procedural as well as object-oriented language||It is an object-oriented language.|
|It is compiled language||It is interpreted and compiled language|
|Portability is poor||It has good portability|
|It supports multiple inheritances||It supports only single inheritance.|
|JRE refers to the Java runtime environment||JDK refers to the Java development kit||JVM refers to Java virtual machine|
|It provides class libraries of JVM, Java, and other components.||It supports developing Java applications||it gives the runtime environment|
|It creates the environment for the execution||It executes Java codes||It specifies all implementations.|
|It is platform dependent||It is platform dependent||It is platform-independent|
|It is the superset of JVM||It has developed tools such as compilers, JavaDoc, Java Debugger, etc.||It is an abstract machine that converts byte code into native machine code.|
Yes. It is possible to overload constructors in Java.it is done based on the number as well as the types of arguments.
Know that we use constructors to initialize data elements when we create classes. A class can have many constructors.
|It is a block of codes used to create new objects||It is a set of statements used to perform specific tasks.|
|Subclasses cannot inherit constructors||Subclasses can inherit methods|
|It is used when initializing objects||It is associated with the functionalities of objects|
|It has no return types||It has return types|
|It cannot have different names than class||It can have names other than class|
Following are the restrictions that we apply to Java static methods:
RDBMS refers to Relational Database Management Systems. RDBMS is a relational database that we use to store, manage, and retrieve data efficiently. It is the underlying working principle of all the popular database management systems like SQL, IBM DB2, MySQL, etc.
Know that RDBMS contains tables where data is stored. The main thing is that data in a table relates to another table. In this regard, we use Primary keys as well as foreign keys to relate the data in the tables.
|Related Article: RDBMS Interview Questions|
Following are the character manipulation functions used in SQL.
Here are the various clauses used with SELECT queries in SQL.
Below are the various constraints used in SQL.
|It refers to online analytical processing||It refers to online transaction processing|
|It manages a large volume of complex queries.||It manages a large number of small transactions|
|It deals with complex queries||It deals with standardized queries|
|It takes a long time to process complex queries.||It is faster in execution|
|It uses data warehouses||It uses databases|
This function replaces null with a meaningful alternative in the results of a query. And this function accepts two arguments. The arguments can have the same or different data types.
The syntax of this function is given as follows
When it comes to the RANK ( ) function, it assigns the same rank if two data items have the same values. But the following value won't be the continuation of the previous rank, but it will be skipped by one value.
When it comes to the DENSE RANK () function, it functions like the RANK () function. The difference is that there is no skipping of values. If two data items have the same value, the following data item will continue the previous value.
We can create temporary tables in SQL servers in two ways
Below are the four principles of Object-oriented programming.
|Related Article: OOPs Interview Questions|
Following are the different storage classes used in C.
They are variables that store the memory address of another variable. A pointer may have different data types, such as integer, double, character, etc.
|An interface cannot have methods||A class can have methods|
|It is declared through the interface keyword||It is declared through the class keyword|
|We cannot create objects||We can create objects|
|We cannot include constructors in interfaces||We can include constructors in a class|
|Interfaces support multiple inheritances||Classes don’t support multiple inheritances|
|Members of a class are always public.||Class members can be default, private, public, and protected.|
|It is a structural programming language||It is an object-oriented programming language|
|It doesn’t support OOP concepts such as inheritance, polymorphism, encapsulation, and abstraction.||It supports OOP concepts|
|It is a function-driven language||It is an object-driven language|
|It doesn’t support built-in data types||It supports built-in data types|
|It doesn’t support reference variables||It supports reference variables.|
Dynamic memory allocation in C is done with the help of malloc (),realloc (),calloc (), and free () functions.
We use the malloc () function to allocate a large memory block. We use the calloc () function to assign a specified number of blocks.
We use the free () method to deallocate the memory. We use the realloc () method to change the memory allocation dynamically.
It is a process performed on software or application to test whether they work as we intend. By doing software testing, we identify errors in the software and rectify them, reduce development costs, and eventually improve performance.
Static testing is conducted to find errors at the beginning of software development. On the other hand, we conduct dynamic testing to detect code defects. It is the process of testing a program without executing it, whereas dynamic testing is the process of testing software by running them.
Static testing can be conducted through walkthroughs, informal meetings, peer reviews, and inspections. They can also be found through control flow, data flow, etc.
Here are the key advantages of dataflow testing.
The below graphic shows the different types of functional testing.
STLC stands for software testing lifecycle. We apply this process to test software and verify whether the software meets the specified quality criteria. There are usually many phases in STLC.
With STLC, we can increase the consistency and effectiveness of the software. This systematic process helps perform quick testing and address issues quickly.
|Related Article: Software Testing Life Cycle(STLC) - Phases of Software Testing|
No. We should conduct system testing only when all the software modules are integrated. Not only that, all the modules should work correctly. Note that system testing is performed before user acceptance testing.
|Test drivers||Test stubs|
|We use drivers in bottom-up integration testing||We use stubs in top-down integration testing|
|They are used in higher-level modules||They are used in low-level modules|
|They are known as calling programs||They are known as called programs|
Here are the reasons why it is challenging to test programs completely.
|We conduct this testing to test the entire software||We perform this testing to test the specific feature of a software|
|It is done for the passed test cases||It is done for the failed test cases|
|We perform this testing to ensure the software works appropriately after updates.||We perform this testing to ensure that the not working part of a program works well after debugging.|
|It is an ideal case for automation||It is not suitable for automation|
|It is a part of STLC||It is a part of the defect lifecycle.|
We conduct mutation testing to identify some specific types of faults. This is because mutation testing is nothing but a fault-based testing technique. For example, we can perform this testing to identify simple syntactic changes in a program.
A prototype is essentially an object that inherits properties from its parent prototype. The parent prototype must have inherited properties from its parent’s prototype. This process is known as prototype chaining.
This method returns a shallow copy of an array into a new array. In other words, it returns a new array with an array's extracted data elements. Here the original array is not modified in any way.
Using the slice () method, we can convert array-like objects into arrays.
It is an anonymous function that can have more than one parameter but a single expression.
We use currying for various purposes, as follows:
It is a period during which we cannot access the ‘const’ and ‘let’ declarations.
The call method allows passing a list of arguments as parameters. This method combines the ‘this’ value with the function.
The bind method allows passing arguments as arrays. It returns a new function.
The apply method allows passing a list of arguments.
We can declare variables in switch blocks just by putting curly brackets around the codes right after the case label.
We can use the following methods to achieve the same.
We can encode URLs using the encodeURIcomponent () and encodeURI () functions. The encodeURI () is used to encode the complete URI. And at the same time, the encodeURIcomponent () is used to encode some components of URI.
We can manipulate DOM using a service worker in the following ways:
|Cookie||Session storage||Local storage|
|The storage capacity is 4 KB||The storage capacity is 5- 10 MB||The storage capacity is 5 MB|
|Data is expired based on window settings||Data is stored only for the session.||It is deleted manually|
|Both servers and clients can read/write cookies||Only the client can read the session||Only the client can read local storage|
|Data transfer to servers exist||No data transfer to the server exists||No data transfer to the server exists|
If you want to be an employee at TCS, you should be familiar with the TCS leadership principles that the company vouches after, such as:
Below mentioned are some useful tips to crack a TCS interview:
In TCS company, two interview rounds take place. The first one is the technical round and the second one is the HR and MR round.
If you have good analytical skills, communication skills, problem-solving abilities, computer science knowledge, and C or C++ knowledge, TCS interviews will not be tough for you.
You can keep an eye on the available vacancies by navigating through their Careers page. Other than this, you can also apply for a job at TCS on LinkedIn and other job-related sites.
Generally, the questions asked in the TCS interview are about yourself, your academic knowledge, past work experience, and your preferred programming language.
The basic salary in TCS is between Rs. 4,00,000 to Rs. 7,00,000 a year.
When appearing for a TCS interview, make sure you stay honest with your answers. Mention some keywords, such as challenging, opportunity to build and maintain client relationships, steep learning curve, team environment, good work culture, opportunities for advancement and growth, demanding, rewarding, and more.
A good brand name, work environment, and leave policy are the top three reasons to join TCS.
No, the TCS HR round is not difficult. However, you will be asked some straightforward questions in this round that you must answer honestly.
If you don’t match the requirements or lie about your experiences, you may get rejected in TCS interviews.
No, TCS does not have a blacklist policy.
Once you have a complete list of TCS interview questions with answers in front of you, preparing for the same becomes a cakewalk. Thus, apart from your academic subjects and professional skills, make sure you go through the list of interview questions mentioned above as thoroughly as possible so as to not miss an opportunity of becoming a TCS employee.
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