TCS Interview Questions and Answers
Interviewer experience and background, as well as the candidate’s expertise, can all affect how challenging the interview will be. If you want to get a job as a fresher or if you want to upgrade your career as an experiaenced professional, go through these TCS interview questions and answers.
TCS Interview Process
TCS employs individuals year-round. Both on-campus and off-campus drives are available. TCS also administers many hiring-related tests each year, such as the following:
- TCS NQT (National Qualifier Test)
- TCS Digital
- TCS Codevitta
- TCS iON
The majority of TCS drives follow this pattern:
- Online assessment exam: There are four sections in the written round, and 90 minutes is the total amount of time allowed. Email writing, coding skills, programming language skills, and numeric ability are the four areas.
- Technical Interview: The face-to-face technical round of the TCS interview consists of questions meant to gauge a candidate’s understanding of OOPS concepts, database management systems, networking, operating systems, and data structures and algorithms. You’ll likely be required to write some code by hand.
- HR/MR Interview: Expect questions on your job history, education, hobbies, and family history in addition to the typical HR inquiries about your strengths and shortcomings, application motivations, suitability for the position, etc.
Generally speaking, TCS does one interview with one technical, one HR, and one MR session.
Alternatively, there are two distinct rounds: one for HR+MR and one for technical.
TCS Interview Questions and Answers for Freshers – Technical
1. State the differences between Java and C languages.
Java is an object-oriented language that emphasizes objects and classes, whereas C uses a procedural programming approach that emphasizes functions.
Java code is platform-independent due to its “Write Once, Run Anywhere” philosophy, while C code is platform-dependent and needs to be recompiled for every platform.
2. Define static variable.
A static variable in programming is one that is allocated “statically,” meaning that it will remain in effect for the duration of the program. It has a persistent value that is declared using the’static’ keyword throughout function calls.
3. Explain objects and classes.
A valid range of values and a default value are among the object attributes that are defined by a class. Object behavior is also described in a class.
An “instance” or member of a class is called an object. There is a state for an object when all of its properties have values that are either defined by default settings or that you expressly define.
4. What are the various methods for avoiding deadlocks?
By removing one or more of the prerequisites for the generation of deadlocks, strategies including resource allocation denial, resource ordering, hold and wait prevention, preemptive resource allocation, and spooling/I/O scheduling help to avoid deadlocks.
5. Explain cache memory.
Cache memory is an additional memory system that allows a computer’s central processing unit (CPU) to handle data and instructions more quickly by temporarily storing them there. The cache is an addition to a computer’s primary memory that improves it.
6. Explain the distinction between a foreign key and a main key.
- Every row in a table is uniquely identified by its primary key.
- By referring to the primary key of another database, a foreign key creates a relationship between tables.
7. Distinguish between a session and a socket?
A socket is created by combining a port number and an IP address (in pairs).
The session acts as a logical connection between the source and the destination.
8. What is the difference between a void pointer and a null pointer?
The void pointer is a generic pointer that points to the other variable of any data type, while the null pointer leads towards the null value of any data type. Any pointer can be changed to a void pointer.
9. What is the difference between outer join and inner join?
SQL joins are useful for retrieving data from the intersection of two tables.
- The data from the intersection of two tables is provided via an inner join.
- The outer join retrieves the data from the union of two tables.
- The left outer join and the right outer join are the two types of outer joins.
10. What are the different types of inheritance?
Single inheritance, multiple inheritance, multi-level inheritance, hierarchical inheritance, and hybrid inheritance are the five forms of inheritance.
TCS Interview Questions and Answers for Experienced – Technical
11. Assign the 1s and 0s in an array to groups so that you may scan the array in a single scan. Make the boundary conditions as optimal as possible.
#include<stdio.h>
#include<conio.h>
void main()
{
int A[10]={‘0′,’1′,’0′,’1′,’0′,’0′,’0′,’1′,’0′,’1′,’0′,’0’};
int x=0,y=A.length-1;
while(x
x++;
else if(A[y])
y–;
if(A[x] && !A[y])//here we are checking that stating index is having 1 and last index having 0 than swap values
A[x]=0,A[y]=1;
}
getch();
}
12. Explain dependency injection.
A design pattern and method for achieving loose coupling between classes and their dependencies is called dependency injection. Instead of having a class generate or handle dependencies directly, it entails injecting dependencies into the class.
Dependency injection improves the testability, flexibility, and maintainability of programming. It is easier to replace or modify dependencies without affecting the class itself when the construction of dependencies is isolated from the class that uses them.
This allows mock objects to be injected, which improves unit testing capabilities and encourages code reuse. It also makes modular and extendable architecture easier.
13. Explain “pass by value” and “pass by reference.”
Pass-by-reference: When a method is called, the caller and the method arguments both refer to the same memory variable.
Pass-by-value: Upon calling a method, the caller supplies the method with a duplicate of the parameter variables, resulting in the memory allocation of two values.
14. To combine two sorted arrays into a single sorted array, write a function.
def merge_sorted_arrays(arr1, arr2):
merged = []
i = 0
j = 0
while i < len(arr1) and j < len(arr2):
if arr1[i] <= arr2[j]:
merged.append(arr1[i])
i += 1
else:
merged.append(arr2[j])
j += 1
while i < len(arr1):
merged.append(arr1[i])
i += 1
while j < len(arr2):
merged.append(arr2[j])
j += 1
return(merged)
arr1 = [1, 3, 5, 7]
arr2 = [2, 4, 6, 8]
merged = merge_sorted_arrays(arr1, arr2)
print(merged)
Output:
1
[1, 2, 3, 4, 5, 6, 7, 8]
15. Create a function that will produce an alphanumeric string at random with a certain length.
function generateRandomString(length) {
const alphanumeric =
ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789′;
let result = ”;
for (let i = 0; i < length; i++) { const randomIndex = Math.floor(Math.random() * alphanumeric.length); result += alphanumeric.charAt(randomIndex); } return result; }
16. To predict the output variable from a single input feature, apply the linear regression technique.
import numpy as np
class LinearRegression:
def __init__(self):
self.coefficients = None
def fit(self, X, y):
X = np.column_stack((np.ones(len(X)), X))
self.coefficients = np.linalg.inv(X.T.dot(X)).dot(X.T).dot(y)
def predict(self, X):
X = np.column_stack((np.ones(len(X)), X))
return X.dot(self.coefficients)
17. Describe the ACID properties of database transactions.
The letters ACID stand for Isolation, Atomicity, Consistency, and Durability. Database atomicity guarantees that each transaction is handled as a single functional unit.
Data consistency guarantees that it stays valid and conforms to established guidelines. Concurrency control through isolation keeps transactions from interfering with one another. The ability to withstand system failures guarantees that committed modifications stay in place.
18. Describe the concept of regularization in machine learning.
One method for preventing overfitting in machine learning models is regularization. It encourages the model to be more straightforward and less prone to overfitting the training set by including a penalty term in the loss function.
Finding the ideal mix between making the training data suit the data and making it generalizable to new data is helpful.
19. How do you optimize website performance and improve loading times?
- Reduce the size of files: Minimize the size of all the files on your website, including the photos, JavaScript, CSS, and HTML.
- To get rid of extraneous characters, whitespace, and comments, compress and minify these files.
- For text-based files, apply compression techniques such as GZIP, and select the right image formats and compression algorithms to minimize file size without sacrificing quality.
- Cache Implementation: Employ server-side and browser-side caching strategies. For static resources, set the cache headers to tell the browser to cache files locally.
- By obtaining files from their cache rather than requesting them from the server again, this enables repeat users to load your website more quickly.
- Use server-side caching techniques, such as object caching or database query caching, to reduce the amount of time that has to be spent retrieving data over and over by storing frequently requested data in memory.
- Enhance the important rendering path: Improve the way above-the-fold material loads and is displayed. Above-the-fold content is the area of a website that users can see without having to scroll.
- To avoid rendering delays, reduce the number of blocking resources (JavaScript and CSS) and load them in order of priority.
- To give customers a quicker initial visual experience, take into account strategies like deferred JavaScript execution, asynchronous loading, and employing CSS media queries for responsive design.
20. How can variables from one class get passed down to any other class?
//Base Class
class A
{
public int a;
}
//Derived Class
class B : A
{
a=15;
}
Common TCS Interview Questions and Answers
21. How much do you know about TCS?
Sample Answer: A multinational provider of information technology (IT) services and consulting is Tata Consultancy Services (TCS). With operations in more than 46 nations, it is among the biggest providers of IT services worldwide. Business process outsourcing, consulting, and software development are just a few of the services that TCS offers.
It is renowned for its creativity, customer-focused strategy, and dedication to societal advancement via a range of CSR programs.
22. Give an example of a time you faced a hurdle and how you overcame it.
Sample Answer: A few days prior to the project’s submission, our team’s primary data source went down, which was a significant setback for our group project in college. Given that the data was essential to our investigation, it posed a serious challenge.
We swiftly got back together, discussed potential fixes, and divided the work to look into more data sources in order to get beyond this. In order to meet the deadline, we looked for a different dataset and put in more time. In the end, our ability to work together, adapt, and persevere enabled us to effectively complete the task.
23. How do you keep up with the most recent technological developments in your industry?
Sample Answer: I have a strong desire to learn new things and keep up with the newest developments in technology. I participate in online forums and communities associated with my field, read trade journals on a regular basis, and follow blogs and websites that are pertinent to my work.
When I could, I have also gone to conferences, workshops, and webinars. In addition, I consider myself a perpetual learner who keeps up with the latest advancements in technology by taking online courses and obtaining certifications to broaden my expertise.
24. At this point in your career, why are you interested in working for TCS?
Sample Answer: TCS is well-known for its extensive clientele, global reach, and technological know-how. I’m looking for fresh challenges, chances for professional development, and the ability to work with cutting-edge technologies at this point in my career. My career ambitions and aspirations are ideally aligned with TCS’s innovative portfolio, employee development focus, and varied approach.
When I could, I have also gone to conferences, workshops, and webinars. I’m also a lifelong learner, taking online classes and earning certifications to expand my knowledge and keep up with new developments in technology.
25. How do you maintain your enthusiasm and inspiration for what you do?
Sample Answer: To be motivated and enthusiastic about my profession, I think it’s important to create clear goals and have a purpose. I always look for new challenges and chances to progress, pushing myself to pick up new knowledge and abilities.
Recognizing and appreciating successes, no matter how minor, keeps me inspired. I also surround myself with a network of mentors and colleagues that inspire me and support my professional growth. I find that self-reflection on a regular basis keeps me focused and optimistic about my profession.
Conclusion
The article goes into extensive detail about TCS interview questions and answers. Hone your skills to align with the requirements of companies like TCS by joining our placement training institute in Chennai.
