TCS Technical interview Questions

Aug 23 • Competition Sample Papers, Engineering Sample Papers • 30333 Views • 12 Comments on TCS Technical interview Questions

About TCS:

TCS (Tata Consultancy Services)

TCS (Tata Consultancy Services) is a multinational information Technology (IT) service, consulting and business solutions company. The company is headquartered in India. It is operative in more than 46 companies and is a part of the famous TATA Group. The company is further listed in the Bombay Stock Exchange. TCS holds some of the biggest IT projects in India. TCS is a multi-billion company and is a leading recruiter in India. It recruits thousands of fresh engineers through its campus and off-campus recruitment processes. As, TCS is one of the leading recruiters the standard of the TCS selection procedure is also standard. Thus, for the help of the students and aspirants of the IT sector here are some TCS technical interview questions.

TCS Technical interview Questions:

1. What is your strongest programming language (Java, ASP, C, C++, VB, HTML, C#, etc.)? 

Before interview You should decide your Favorite programming language and be prepared based on that question.

2.Differences between C and Java?

1.JAVA is Object-Oriented while C is procedural.

2.Java is an Interpreted language while C is a compiled language.

3.C is a low-level language while JAVA is a high-level language.

4.C uses the top-down approach while JAVA uses the bottom-up approach.

5.Pointer go backstage in JAVA while C requires explicit handling of pointers.

6.The Behind-the-scenes Memory Management with JAVA & The User-Based Memory Management in C.

7.JAVA supports Method Overloading while C does not support overloading at all.

8.Unlike C, JAVA does not support Preprocessors, & does not really them.

9.The standard Input & Output Functions–C uses the printf & scanf functions as its standard input & output while JAVA uses the System.out.print & System.in.read functions.

10.Exception Handling in JAVA And the errors & crashes in C.

3.In header files whether functions are declared or defined?

Functions are declared within header file. That is function prototypes exist in a header file,not function bodies. They are defined in library (lib).

4.What are the different storage classes in C ?

There are four types of storage classes in C. They are extern, register, auto and static

5.What does static variable mean?

Static is an access qualifier. If a variable is declared as static inside a function, the scope is limited to the function,but it will exists for the life time of the program. Values will be persisted between successive
calls to a function

6.How do you print an address ?

Use %p in printf to print the address.

7.What are macros? what are its advantages and disadvantages? 

Macros are processor directive which will be replaced at compile time.
The disadvantage with macros is that they just replace the code they are not function calls. similarly the advantage is they can reduce time for replacing the same values.

8. Difference between pass by reference and pass by value? 

Pass by value just passes the value from caller to calling function so the called function cannot modify the values in caller function. But Pass by reference will pass the address to the caller function instead of value if called function requires to modify any value it can directly modify.

9. What is an object?

Object is a software bundle of variables and related methods. Objects have state and behavior

10.What is a class?

Class is a user-defined data type in C++. It can be created to solve a particular kind of problem. After creation the user need not know the specifics of the working of a class.

11.What is the difference between class and structure?

Structure: Initially (in C) a structure was used to bundle different type of data types together to perform a particular functionality. But C++ extended the structure to contain functions also.
The major difference is that all declarations inside a structure are by default public.
Class: Class is a successor of Structure. By default all the members inside the class are private.

12. What is ponter?

Pointeris a variable in a program is something with a name, the value of which can vary. The way the compiler and linker handles this is that it assigns
a specific block of memory within the computer to hold the value of that variable.

13.What is the difference between null and void pointer?

A Null pointer has the value 0. void pointer is a generic pointer introduced by ANSI. Generic pointer can hold the address of any data type.

14.what is function overloading 

Function overloading is a feature of C++ that allows us to create multiple functions with the same name, so long as they have different parameters.Consider the following function:
int Add(int nX, int nY)
{
return nX + nY;
}

15.What is function overloading and operator overloading?

Function overloading: C++ enables several functions of the same name to be defined, as long as these functions have different sets of parameters (at least as far as their types are concerned). This capability is called function overloading. When an overloaded function is called, the C++ compiler selects the proper function by examining the number, types and order of the arguments in the call. Function overloading is commonly used to create several functions of the same name that perform similar tasks but on different data types.
Operator overloading allows existing C++ operators to be redefined so that they work on objects of user-defined classes. Overloaded operators are syntactic sugar for equivalent function calls. They form a pleasant facade that doesn’t add anything fundamental to the language (but they can improve understandability and reduce maintenance costs).

Here are some of the TCS technical interview question for the help of students. Read the technical interview question to prepare better.

For more TCS technical interview questions please download: TCS technical questions pdf

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