Top 150 C Interview Questions and Answers 2024

The default value of reg keyword is garbage value due to performance optimization.

• Garbage value is faster to assign than initializing to a specific value.

• Initializing to a specific value would require additional instructions and memory access.

• The value of reg keyword is expected to be overwritten before use.

• Garbage value can help in detecting uninitialized variables during testing.

• Example: int x; // x will have a garbage value until assigned a value.

C is a procedural programming language while C++ is an extension of C with added features of object-oriented programming.

• C is a procedural language, while C++ supports both procedural and object-oriented programming.

• C++ has additional features like classes, objects, inheritance, and polymorphism.

• C++ supports function overloading and exception handling, which are not present in C.

• C++ has a standard template library (STL) that provides useful data structures and algorithms.

• C++ ...read more

Code to find the factorial of a number

• Use a loop to multiply the number with all the numbers below it

• Handle the case when the number is 0 or 1 separately

• Use long data type to handle large factorials

C is a compiled language with low-level memory manipulation, while Python is an interpreted language with high-level abstractions.

• C is faster and more efficient for low-level programming, while Python is easier to learn and use for high-level tasks.

• C requires manual memory management, while Python has automatic garbage collection.

• C is statically typed, while Python is dynamically typed.

• C is used for system programming, embedded systems, and game development, while Python is u...read more

calloc initializes the allocated memory to zero, while malloc does not.

• calloc allocates memory for an array of elements and initializes them to zero, while malloc only allocates memory without initialization.

• calloc is useful for initializing arrays of integers or structures, while malloc is more flexible for allocating memory for any data type.

• Example: int *arr = (int*)calloc(5, sizeof(int)); // initializes array of 5 integers to zero

Web development using C involves using frameworks like CGI, FastCGI, or libraries like libmicrohttpd.

• Use frameworks like CGI or FastCGI to handle HTTP requests and responses.

• Utilize libraries like libmicrohttpd for creating web servers in C.

• Implement server-side logic in C to generate dynamic web content.

• Use HTML and CSS for front-end development alongside C for back-end logic.

C is a programming language and routing is the process of selecting the best path for network traffic.

• C is a high-level programming language used for system programming and developing applications.

• Routing is the process of selecting the best path for network traffic to reach its destination.

• Routing protocols like OSPF, BGP, and EIGRP are used to determine the best path for network traffic.

• Routing tables are used to store information about network topology and available paths....read more

Knowledge of C and object-oriented languages is essential for software application developers.

• C is a procedural programming language commonly used for system programming and embedded systems.

• Object-oriented languages like Java, C++, and Python allow for the creation of reusable code through the use of classes and objects.

• Understanding concepts like inheritance, polymorphism, and encapsulation is crucial in object-oriented programming.

• Proficiency in C and object-oriented langu...read more

The choice of compiler in C depends on the platform and the specific needs of the project.

• Different platforms may have different default compilers, such as GCC on Linux and Clang on macOS.

• Some projects may require a specific compiler for compatibility or performance reasons.

• C compilers include GCC, Clang, Microsoft Visual C++, and Intel C++ Compiler, among others.

Pascal is a strongly typed language with built-in data types, while C is a weakly typed language with pointers and manual memory management.

• Pascal has built-in data types, while C requires manual declaration and definition of data types

• Pascal is strongly typed, while C is weakly typed

• C has pointers and manual memory management, while Pascal does not

• Pascal has a simpler syntax and is easier to learn, while C is more complex and powerful

• C is widely used in systems programming, ...read more

The keyword Static is used to declare a variable or method that belongs to the class and not to the instance of the class.

• Static variables are shared by all instances of the class.

• Static methods can be called without creating an instance of the class.

• Static variables and methods are accessed using the class name instead of the instance name.

• Static variables are initialized only once, at the start of the program.

• Examples of static methods include Math.max() and Arrays.sort().

Structures in C are user-defined data types that allow for grouping different data types under a single name.

• Structures can contain variables of different data types, allowing for more complex data organization.

• They are defined using the 'struct' keyword.

• Example: struct Person { char name[50]; int age; float salary; };

• Individual members of a structure can be accessed using the dot operator (.)

• Example: struct Person p1; p1.age = 30;

Bitwise operations in C are used to manipulate individual bits of data in variables.

• Bitwise AND (&) - sets a bit to 1 only if both corresponding bits are 1

• Bitwise OR (|) - sets a bit to 1 if either of the corresponding bits is 1

• Bitwise XOR (^) - sets a bit to 1 if the corresponding bits are different

• Bitwise NOT (~) - inverts all the bits in a variable

• Left shift (<<) - shifts the bits to the left by a specified number of positions

• Right shift (>>) - shifts the bits to the right...read more

The gcc compiler processes C files by preprocessing, compiling, assembling, and linking.

• Preprocessing: Removes comments, expands macros, and includes header files.

• Compiling: Translates source code into assembly code.

• Assembling: Converts assembly code into machine code.

• Linking: Combines object files and libraries into an executable.

Print even numbers in Python and Fibonacci series in Python.

• For printing even numbers in Python, use a loop to iterate through a range of numbers and check if each number is divisible by 2.

• For printing Fibonacci series in Python, use a loop to generate the series by adding the previous two numbers in the sequence.

• Example for even numbers in Python: for i in range(1, 11): if i % 2 == 0: print(i)

• Example for Fibonacci series in Python: a, b = 0, 1 for _ in range(10): print(a) a,...read more

Unions are used to combine multiple variables of different data types into a single variable.

• Unions allow for efficient use of memory by sharing the same memory location for different variables.

• They are commonly used in low-level programming for hardware access and data serialization.

• An example of a union is a struct that contains a float and an integer, where changing the value of one will affect the other.

C is a procedural programming language while C++ is an object-oriented programming language.

• C is a low-level language while C++ is a high-level language.

• C++ supports object-oriented programming concepts like classes, inheritance, and polymorphism.

• C++ has better support for exception handling and templates.

• C++ is more complex than C and requires more memory.

• C++ is used for developing applications like video games, while C is used for developing operating systems and system sof...read more

C is a procedural programming language while Java is an object-oriented programming language.

• C is a low-level language while Java is a high-level language.

• C requires manual memory management while Java has automatic memory management.

• C supports pointers while Java does not.

• C is platform-dependent while Java is platform-independent.

• C has a simpler syntax compared to Java.

Code snippets in Python and C for System Engineer interview question

• Use Python for high-level scripting and C for low-level system programming

• Python example: ```python print('Hello, World!') ```

• C example: ```c #include int main() { printf('Hello, World!'); return 0; } ```

Embedded C is a variant of C programming language used for programming embedded systems.

• Embedded C is used for programming microcontrollers, sensors, and other embedded systems.

• It has limited resources and memory, so it requires efficient coding.

• It has specific libraries and functions for hardware control.

• Normal C is used for general-purpose programming and has no specific hardware dependencies.

• Embedded C is compiled using a cross-compiler, while normal C is compiled using a ...read more

calloc and malloc are functions used in C programming to allocate memory dynamically.

• calloc is used to allocate and initialize a block of memory, setting all bytes to zero.

• malloc is used to allocate a block of memory without initializing its contents.

• Both functions return a pointer to the allocated memory, or NULL if the allocation fails.

C data types are used to define the type of data that a variable can hold in C programming language.

• C data types include basic types like int, char, float, double, etc.

• Derived types like arrays, pointers, structures, and unions are also part of C data types.

• Examples: int num = 10; char letter = 'A'; float price = 10.5;

• Examples: int arr[5]; int *ptr; struct student { char name[20]; int age; };

Data structures in C language are essential for organizing and manipulating data efficiently.

• Data structures like arrays, linked lists, stacks, queues, trees, and graphs are commonly used in C programming.

• Arrays are used to store a collection of elements of the same data type.

• Linked lists are used to store elements in a linear order.

• Stacks and queues are used for storing elements in a last-in-first-out (LIFO) and first-in-first-out (FIFO) manner, respectively.

• Trees and graphs...read more

C is a procedural programming language known for its efficiency and low-level memory manipulation capabilities.

• C is a compiled language

• It has a small set of keywords and operators

• It supports pointers and low-level memory manipulation

• It has a preprocessor for macro expansion

• It has a standard library with functions for common tasks

• Examples: printf() for output, scanf() for input, malloc() for memory allocation

C is a procedural programming language while C++ is an extension of C with added features of object-oriented programming.

• C is a procedural language, meaning it follows a step-by-step approach to solve a problem.

• C++ is an extension of C and supports both procedural and object-oriented programming paradigms.

• C++ introduces classes, objects, inheritance, and polymorphism, which are not present in C.

• C++ has additional features like exception handling, templates, and namespaces.

• C++...read more

C is a procedural language while Java is an object-oriented language.

• C is compiled while Java is interpreted

• C has pointers while Java does not

• Java has automatic garbage collection while C does not

• Java has platform independence while C does not

• Java has built-in exception handling while C does not

Write a coding in both python & C

• Use a simple program like printing 'Hello, World!'

• Ensure syntax and formatting are correct in both languages

• Test the code in both Python and C environments

Embedded C is a subset of C language specifically designed for embedded systems programming.

• Embedded C is optimized for resource-constrained systems with limited memory and processing power.

• Embedded C may have specific compiler directives and keywords for hardware manipulation.

• Embedded C may not support all standard C libraries and features.

• Example: Using 'volatile' keyword for memory-mapped hardware registers in Embedded C.

Program logic for factorial in C programming

• Use a loop to multiply the number with all the numbers less than it

• Initialize the result variable with 1

• Handle the case when the input is 0 or 1 separately

C is a procedural language while C++ is an object-oriented language.

• C does not support classes and objects while C++ does.

• C++ supports function overloading while C does not.

• C++ has a built-in exception handling mechanism while C does not.

• C++ supports namespaces while C does not.

• C++ supports references while C does not.

I rate myself 8/10 in C and 9/10 in Java.

• Strong understanding of data structures and algorithms

• Experience in developing applications using both languages

• Familiarity with debugging and troubleshooting

• Regularly update my knowledge through online resources and courses

Python is better than C due to its simplicity, readability, and versatility.

• Python is easier to learn and use compared to C, making it more beginner-friendly.

• Python code is more readable and concise, leading to faster development and easier maintenance.

• Python has a wide range of libraries and frameworks for various applications, while C is more low-level and requires more manual memory management.

C code in Java refers to the use of the Java Native Interface (JNI) to incorporate C code into Java programs.

• C code in Java is typically used when performance optimization or low-level system access is required.

• JNI allows Java programs to call C functions and use C libraries.

• C code can be written separately and compiled into a shared library, which is then loaded and used by Java code.

• JNI provides a way to pass data between Java and C, handle exceptions, and manage memory.

• Exa...read more

C++ is an extension of C with object-oriented programming features.

• C++ supports object-oriented programming while C does not.

• C++ has a richer set of libraries compared to C.

• C++ allows function overloading while C does not.

• C++ supports exception handling while C does not.

• C++ has a more complex syntax compared to C.

• C++ is backward compatible with C.

• C++ has a built-in string class while C does not.

I would rate myself as proficient in both C and Java.

• I have extensive experience in both languages, having worked on multiple projects using them.

• I am comfortable with the syntax and can write efficient and optimized code.

• I am familiar with the standard libraries and can use them effectively.

• I am always learning and improving my skills in both languages.

• For example, in C, I have worked on projects involving embedded systems and low-level programming, while in Java, I have dev...read more

C Python is a C extension module that allows C code to call Python functions and manipulate Python objects.

• Cython is a popular tool for writing C extensions for Python

• NumPy is a Python library that provides support for large, multi-dimensional arrays and matrices

• Pygame is a set of Python modules designed for writing video games

• Scikit-learn is a Python library for machine learning built on top of NumPy and SciPy

Little endian and Big endian are byte ordering formats in which multi-byte data is stored in memory.

• Little endian: Least significant byte is stored at the lowest memory address.

• Big endian: Most significant byte is stored at the lowest memory address.

• Example: In Little endian, the number 0x12345678 is stored as 78 56 34 12 in memory.

• Example: In Big endian, the same number is stored as 12 34 56 78 in memory.

C++ is an extension of C with object-oriented programming features.

• C++ supports classes and objects while C does not.

• C++ has better support for function overloading and templates.

• C++ has a standard library that includes many useful functions.

• C++ allows for both procedural and object-oriented programming.

• C++ is generally considered to be more complex than C.

Java is an object-oriented programming language while C is a procedural programming language.

• Java is platform-independent while C is platform-dependent.

• Java has automatic memory management while C requires manual memory management.

• Java has built-in support for multithreading while C requires external libraries for multithreading.

• Java has a larger standard library compared to C.

• Java is used for developing web applications, mobile applications, and enterprise software while C i...read more

Storage classes in C define the scope and lifetime of variables.

• Auto: default storage class for local variables

• Register: stores variables in CPU registers for faster access

• Static: retains value between function calls

• Extern: allows variables to be accessed across multiple files

C is preferred over C++ for certain applications due to its simplicity and efficiency.

• C is a simpler language compared to C++ and has a smaller runtime footprint.

• C is often used for low-level programming, embedded systems, and operating systems.

• C allows for more control over memory management and can be faster in certain scenarios.

• C++ introduces additional features like object-oriented programming and templates, which may not be necessary for all projects.

C language is a procedural programming language, while Java is an object-oriented programming language.

• C language is low-level and provides direct access to memory, making it efficient for system programming.

• Java is platform-independent and has a rich set of libraries, making it suitable for developing applications.

• C language uses pointers extensively, while Java handles memory management automatically with garbage collection.

• C language is widely used for operating systems, e...read more

A storage class in C defines the scope and lifetime of variables.

• Storage classes include auto, register, static, and extern.

• Auto variables are stored in the stack and have local scope.

• Register variables are stored in CPU registers for faster access.

• Static variables retain their value between function calls.

• Extern variables are declared in one file and can be used in another file.

C++ is an extension of C with object-oriented programming features.

• C++ supports classes and objects while C does not.

• C++ has better support for function overloading and templates.

• C++ has a more complex syntax compared to C.

• C++ has a standard library that includes many useful functions.

• C++ is generally considered to be a more powerful language than C.

Java and C are both programming languages, but differ in syntax, usage, and platform compatibility.

• Java is an object-oriented language, while C is a procedural language.

• Java is platform-independent, while C is platform-dependent.

• Java has automatic memory management, while C requires manual memory management.

• Java has a larger standard library than C.

• C is faster and more efficient than Java for certain tasks, such as system programming.

• Java is commonly used for web development,...read more

An array in C is a collection of elements of the same data type stored in contiguous memory locations.

• Arrays are declared by specifying the data type of the elements and the number of elements in square brackets, e.g. int arr[5];

• Elements in an array can be accessed using their index, starting from 0, e.g. arr[0] refers to the first element.

• Arrays in C are zero-indexed, meaning the first element is at index 0.

• Arrays can be of any data type, including arrays of strings like cha...read more

C++ is an extension of C with object-oriented programming features.

• C++ supports classes and objects while C does not.

• C++ has better support for polymorphism and inheritance.

• C++ has a standard template library (STL) for data structures and algorithms.

• C++ allows function overloading while C does not.

• C++ has exception handling while C does not.

Both Java and C have their own strengths and weaknesses, and the choice depends on the specific requirements of the project.

• Java is better for developing enterprise-level applications due to its platform independence and robustness.

• C is better for developing system-level software and applications that require high performance and low-level access to hardware.

• Java has a larger community and more libraries and frameworks available, making it easier to find solutions to common p...read more

Examples of data types in C include int, float, char, and double.

• int: used for storing integer values (e.g. age = 25)

• float: used for storing floating-point numbers (e.g. height = 5.8)

• char: used for storing single characters (e.g. grade = 'A')

• double: used for storing double-precision floating-point numbers (e.g. salary = 50000.50)

C++ is better than C due to its object-oriented programming features and better memory management.

• C++ supports object-oriented programming while C does not.

• C++ has better memory management with features like constructors and destructors.

• C++ has more advanced features like templates and exceptions.

• C++ is more versatile and can be used for both low-level system programming and high-level application development.

• C++ has a larger standard library compared to C.

• C++ allows for func...read more

C is a procedural language while Java is an object-oriented language.

• C is compiled while Java is interpreted

• Java has automatic garbage collection while C requires manual memory management

• Java has platform independence while C is platform dependent

• Java has built-in exception handling while C does not

• Java has a larger standard library than C

Use a loop to iterate through the array and count the occurrences of a specific element.

• Initialize a counter variable to keep track of the occurrences.

• Use a loop to iterate through the array.

• Check each element in the array and increment the counter if it matches the specific element.

• Return the final count of occurrences.

C++ is an extension of C with object-oriented programming features.

• C++ supports classes and objects while C does not.

• C++ has better support for function overloading and templates.

• C++ has a standard library that includes many useful functions.

• C++ is more complex than C and can be harder to learn.

• C++ code can be compiled as C code with some modifications.

Java is a high-level programming language used for developing applications. Java is platform-independent and object-oriented.

• Java is compiled and interpreted while C is only compiled

• Java is platform-independent while C is platform-dependent

• Java is object-oriented while C is procedural

• Java has automatic garbage collection while C does not

• Java has a larger standard library compared to C

Swapping two numbers without using a third variable in C code.

• Use bitwise XOR operation to swap two numbers without using a third variable.

• Example: int a = 5, b = 10; a = a ^ b; b = a ^ b; a = a ^ b; // Now a = 10, b = 5

C++ is an extension of C with object-oriented programming features.

• C++ supports classes and objects while C does not.

• C++ has constructors and destructors while C does not.

• C++ supports function overloading while C does not.

• C++ has namespaces while C does not.

• C++ supports exception handling while C does not.

Java is a high-level programming language known for its platform independence, while C is a low-level programming language with more direct hardware access.

• Java is platform-independent, meaning code can run on any device with a Java Virtual Machine (JVM)

• C is a low-level language with more direct hardware access, making it faster but less portable than Java

• Java has automatic memory management through garbage collection, while C requires manual memory management

The output of a C program depends on the code logic and input provided.

• The output can be determined by analyzing the code and understanding the logic implemented.

• Input values can also affect the output of the program.

• Compile and run the program to see the actual output.

C++ is an extension of C with added features like object-oriented programming, templates, and exception handling.

• C++ supports object-oriented programming while C does not.

• C++ has templates for generic programming while C does not.

• C++ has exception handling while C does not.

• C++ has a standard library that includes the C standard library.

• C++ allows function overloading while C does not.

Java and C are both popular programming languages used for developing software applications.

• Java is a high-level, object-oriented programming language known for its platform independence.

• C is a procedural programming language known for its efficiency and flexibility.

• Java uses a virtual machine to run code, while C directly compiles to machine code.

• Java is commonly used for web development, mobile apps, and enterprise applications.

• C is often used for system programming, embedd...read more

malloc and calloc are functions in C programming used for dynamic memory allocation.

• malloc function is used to allocate a single block of memory of a specified size.

• calloc function is used to allocate multiple blocks of memory of a specified size, initialized to zero.

• Example: int *ptr = (int*)malloc(5 * sizeof(int));

• Example: int *ptr = (int*)calloc(5, sizeof(int));

C and C++ are programming languages used for system programming and application development.

• C is a procedural programming language developed by Dennis Ritchie in 1972.

• C++ is an object-oriented programming language developed by Bjarne Stroustrup in 1983.

• C is used for system programming, embedded systems, and operating systems.

• C++ is used for application development, game development, and system programming.

• C++ is an extension of C with additional features like classes, inherit...read more

C is a procedural programming language while Java is an object-oriented programming language.

• C is a procedural programming language, focusing on functions and procedures.

• Java is an object-oriented programming language, focusing on classes and objects.

• C requires manual memory management, while Java has automatic garbage collection.

• C is platform-dependent, while Java is platform-independent due to its bytecode compilation.

• C supports pointers, while Java does not.

• C has a simpler...read more

Structs and unions are data structures in C programming used to group different data types under a single name.

• Structs allow you to group different data types together under a single name. For example, a struct 'Person' can have fields like name, age, and gender.

• Unions are similar to structs but they share the same memory location for all its members. Only one member can contain a value at a time. For example, a union 'Data' can have fields like int, float, and char, but only...read more

C and C++ are programming languages used for system and application software development.

• C is a procedural programming language developed by Dennis Ritchie in 1972.

• C++ is an object-oriented programming language developed by Bjarne Stroustrup in 1983.

• C is used for developing system software, device drivers, and embedded systems.

• C++ is used for developing application software, games, and operating systems.

• C++ is an extension of C with additional features like classes, inheritan...read more

Java is a high-level programming language, while C is a low-level language. Java is platform-independent and has automatic memory management.

• Java is an object-oriented language, while C is a procedural language.

• Java uses a virtual machine (JVM) for execution, while C directly compiles to machine code.

• Java has built-in garbage collection, while C requires manual memory management.

• Java supports multithreading and exception handling, while C has limited support for these feature...read more

Stack variable is present in the stack segment of memory.

• Stack variables are local variables declared inside a function and are stored in the stack segment of memory.

• Stack memory is used for function calls and local variables, and is managed in a Last In First Out (LIFO) manner.

• Example: int x; is a stack variable declared inside a function.

C is a procedural programming language while C++ is an extension of C with object-oriented programming features.

• C is a procedural language while C++ supports both procedural and object-oriented programming.

• C does not have built-in support for classes and objects, while C++ does.

• C++ supports features like inheritance, polymorphism, and encapsulation which are not available in C.

• C++ has a standard template library (STL) which provides useful data structures and algorithms.

• C++ a...read more

C and Java are both programming languages commonly used for software development.

• C is a procedural programming language developed by Dennis Ritchie in 1972.

• Java is an object-oriented programming language developed by Sun Microsystems in 1995.

• C is often used for system programming and low-level programming.

• Java is platform-independent and commonly used for web development.

• C requires manual memory management, while Java has automatic garbage collection.

Data types in C language define the type of data that a variable can store.

• Basic data types include int, float, char, double, etc.

• Derived data types include arrays, pointers, structures, unions, etc.

• Example: int num = 10; char letter = 'A'; float value = 3.14;

C is a procedural programming language while C++ is an object-oriented programming language.

• C is a low-level language while C++ is a high-level language.

• C does not support classes and objects while C++ does.

• C++ supports function overloading and operator overloading while C does not.

• C++ has better support for exception handling than C.

• C++ is an extension of C language.

Proficient in C language and Java programming with experience in developing software applications.

• Strong understanding of data structures and algorithms in C language

• Experience in developing web applications using Java

• Knowledge of object-oriented programming principles in Java

• Familiarity with Java frameworks like Spring and Hibernate

Storage variables in C are used to store data temporarily during program execution.

• Storage variables in C are declared using data types like int, float, char, etc.

• They can be stored in different memory locations like stack, heap, or data segment.

• Variables declared outside functions have global scope and are stored in data segment.

• Variables declared inside functions have local scope and are stored in stack memory.

• Dynamic memory allocation using functions like malloc() stores v...read more

C is a procedural programming language while C++ is an extension of C with added features of object-oriented programming.

• C is a procedural language, meaning it follows a step-by-step approach to solve a problem.

• C++ is an extension of C and supports both procedural and object-oriented programming paradigms.

• C++ introduces features like classes, objects, inheritance, and polymorphism that are not present in C.

• C++ allows for the use of libraries and frameworks developed in C, mak...read more

C is a procedural programming language while Java is an object-oriented programming language.

• C is a low-level language, closer to the hardware, while Java is a high-level language.

• C requires manual memory management, while Java has automatic garbage collection.

• C is platform-dependent, while Java is platform-independent due to its bytecode.

• C uses pointers extensively, while Java does not have pointers.

• C is used for system programming, embedded systems, etc., while Java is used...read more

C is called middle level language because it combines features of both high-level and low-level languages.

• C allows low-level manipulation like memory management and bit manipulation.

• C also supports high-level features like functions, data structures, and dynamic memory allocation.

• C is closer to the hardware compared to high-level languages like Java or Python, but not as close as low-level languages like assembly.

• C provides a good balance between performance and flexibility.

C++ is an extension of C language with object-oriented programming features.

• C++ supports object-oriented programming while C does not.

• C++ has more advanced features like templates, exceptions, and namespaces.

• C++ is more complex and harder to learn than C.

• C++ is used for developing system software, games, and applications.

• C is used for developing operating systems, embedded systems, and device drivers.

C is a procedural programming language. C is faster and more efficient than Java.

• C is a low-level language, closer to machine code.

• C requires manual memory management, while Java has automatic garbage collection.

• C is used for system programming, embedded systems, and operating systems.

• Java is used for web development, mobile app development, and enterprise applications.

Storage classes in C language define the scope and lifetime of variables.

• There are four storage classes in C: auto, register, static, and extern.

• Auto variables are local to the block they are declared in and have automatic storage duration.

• Register variables are stored in CPU registers for faster access.

• Static variables retain their value between function calls.

• Extern variables are declared outside of any function and can be accessed by other files.

• Example: int x; // auto sto...read more

Providing C and C++ code for Senior Software Engineer position

• For C code, demonstrate knowledge of pointers, memory allocation, and basic data structures

• For C++ code, showcase understanding of object-oriented programming, inheritance, and polymorphism

• Provide clear and concise code with proper commenting and formatting

I am proficient in C and Java programming languages.

• Experience in developing applications using C and Java

• Knowledge of data structures and algorithms

• Familiarity with object-oriented programming concepts

• Ability to write efficient and optimized code

• Examples: Developed a Java-based web application for online shopping, Implemented a C program for sorting algorithms

Structures in C are user-defined data types that allow grouping of variables of different data types under a single name.

• Structures are used to represent a record which consists of different data types.

• They are defined using the 'struct' keyword.

• Each variable in a structure is called a member.

• Structures can be nested within other structures.

• Example: struct employee { int emp_id; char emp_name[50]; float emp_salary; };

• Example: struct point { int x; int y; };

C is a procedural programming language while C++ is an object-oriented programming language.

• C++ supports classes and objects while C does not.

• C++ has better support for polymorphism and inheritance than C.

• C++ has a larger standard library than C.

• C++ allows function overloading while C does not.

• C++ supports exception handling while C does not.

C is a procedural language while Java is an object-oriented language.

• C is compiled while Java is interpreted.

• C has pointers while Java does not.

• Java has automatic garbage collection while C does not.

• Java has a built-in exception handling mechanism while C does not.

• Java has a larger standard library than C.

• C is used for system programming while Java is used for web and mobile applications.

Use a loop to print each character of the string passed as a char* parameter.

• Use a for loop to iterate through each character of the char* parameter.

• Print each character using printf or cout.

• Ensure to handle the null terminator at the end of the string.

C++ is an extension of C with added features like object-oriented programming, templates, and exception handling.

• C++ supports object-oriented programming while C does not.

• C++ has a richer set of data types and operators than C.

• C++ supports function overloading and templates while C does not.

• C++ has exception handling while C does not.

• C++ is backward compatible with C.

• Example: C++ allows defining classes and objects while C does not.

• Example: C++ supports function overloading, ...read more

Functions in C are blocks of code that perform a specific task and can be called multiple times within a program.

• Functions in C are defined using a return type, function name, parameters, and a body enclosed in curly braces.

• Functions can be called multiple times within a program to perform the same task without rewriting the code.

• Functions can return a value using the 'return' statement.

• Functions can also be void, meaning they do not return a value.

• Example: int add(int a, int...read more

C and C++ are programming languages used for system programming and application development.

• C is a procedural language while C++ is an object-oriented language.

• C is used for system programming, embedded systems, and low-level programming.

• C++ is used for application development, game development, and high-performance computing.

• C++ supports features like inheritance, polymorphism, and encapsulation.

• Both languages are compiled languages and have a similar syntax.

A pointer is a variable that stores the memory address of another variable.

• Pointers are used to access and manipulate memory directly.

• They are commonly used in programming languages like C and C++.

• Example: int *ptr; // declares a pointer to an integer variable

C and C++ are programming languages used for system and application software development.

• C is a procedural programming language developed by Dennis Ritchie in 1972.

• C++ is an object-oriented programming language developed by Bjarne Stroustrup in 1983.

• Both languages are widely used for developing operating systems, device drivers, and other system software.

• C++ is also used for developing applications, games, and other software.

• C++ is an extension of C and includes additional fe...read more

Use a loop to copy characters from one string to another

• Create two character arrays to store the strings

• Use a loop to iterate through each character of the source string and copy it to the destination string

• Add a null terminator at the end of the destination string to mark the end of the copied string

C++ and C are programming languages used for system and application development.

• C++ is an object-oriented language that supports polymorphism, inheritance, and encapsulation.

• C is a procedural language that is widely used for system programming and embedded systems.

• Both languages are compiled and have a wide range of applications in software development.

• C++ is often used for developing applications, games, and operating systems.

• C is often used for developing system software, d...read more

Use a loop to print each character of the string in C style array format

• Declare an array of characters with the string length + 1 for null terminator

• Use a loop to copy each character of the string into the array

• Add a null terminator at the end of the array to signify the end of the string

C++ is an extension of C programming language with added features like object-oriented programming and templates.

• C++ supports object-oriented programming while C does not.

• C++ has a richer set of libraries compared to C.

• C++ supports function overloading while C does not.

• C++ supports exception handling while C does not.

• C++ supports templates while C does not.

• C++ has a more complex syntax compared to C.

• C++ is backward compatible with C.

• C++ is used for developing operating system...read more

Detect endianness using C program

• Use a union to create a variable with a known value

• Check the value of the first byte to determine endianness

• Big endian systems store the most significant byte first

• Little endian systems store the least significant byte first

• Example: union { int i; char c; } u; u.i = 1; if (u.c == 1) { /* Little endian */ } else { /* Big endian */ }

C is a procedural programming language while C++ is an extension of C with added features of object-oriented programming.

• C is a procedural language, while C++ supports both procedural and object-oriented programming.

• C does not have built-in support for classes and objects, while C++ does.

• C++ supports features like inheritance, polymorphism, and encapsulation, which are not present in C.

• C++ has a standard template library (STL) that provides useful data structures and algorith...read more

Structures in C are user-defined data types that allow you to group different variables under a single name.

• Structures are used to represent a record.

• They can contain variables of different data types.

• You can access the members of a structure using the dot operator.

• Structures are defined using the 'struct' keyword.