Arrays use static memory allocation while linked lists use dynamic memory allocation. Question: Please compare static memory allocation with dynamic memory allocation? Such a function is called a recursive function. Doing the same will get 0 in the case of calloc() function. Submitted questions and answers are subject to review and editing, and may or may not be selected for posting, at the sole discretion of Toptal, LLC. It is of two types: 1. Home » C solved programs. The value of the constant is locked during the execution of the program. It is defined in the stdio.h header file. Example: int sum(int a, int b){ c = a+b; return c;}, int sum(int x, int y, int z){ v = x+y+z; return v;}. What are dangling pointers? These are always arranged and stored in sequential order. Question: Explain the various operations performed by the Pointer with examples. The programming language not only has a wide variety of applications but is also the inspiration for a variety of modern, powerful programming languages, such as Java, C#, and Python. "); /* Using the sprintf() function for storing the string in the buffer.*/. A C++ … Some of the examples are void and return etc. What is a void pointer? Question: What do you mean by increments and decrement statements in C programming and how we can construct that increment and decrement statements? Answer: A pointer that points to a memory location that is already deleted is called a dangling pointer. In our main function, we can call the functions as: The first call will print the message “I am in superclass A” and the second will print “I am in subclass B”. What will happen if we include a header file twice in a C program? While only one element can be accessed at a time in the union, it is possible to access all elements of a structure simultaneously. Answer: In C programming we usually follow three types of control structures and that are sequence, selection and repetition. Class is an entity that represents something. Answer: calloc() and malloc() are library functions used for allocating memory dynamically, i.e., the memory is allocated during runtime from the heap segment. So basically every node has two pointers at the ends. When retrieving data from such files each data needs to read one by one until the required information found. The difference between the two, however, lies in terms of displaying the output. Answer: C language has the edge over the other programming language, which certainly makes it “The mother of programming language.” Some of the benefits of using C language are stated below: Middle – Level Language: As the C language is in the midway of a high-level language and low-level language, it brings together the features of both of them. The extern keyword is used for extending the visibility or scope of variables and functions. What is the difference between #include "..." and #include <...>? In the main() function, the count of the command line arguments is given out by the numofargs. Question: What is the exact meaning of debugging in C programming? C++ is one of the harder languages to master, so if you’re being asked C++ interview questions you can expect them to be technical to fully demonstrate your understanding of the complex development language. It can also take place when the command is to be given in lower case but by mistake, it is given in the upper case. For example, you can’t use printf() and scanf() functions without including the stdio.h header file. C programming is considered as the base for other programming languages, that is why it is known as mother language. The variable is destroyed when the function exits. Storing data in a stack also known as a PUSH while data retrieval is referred to as a POP. It also supports the use of the English type of words in its functioning. It’s regardless of which domain or language you would like to pursue your career in, because 91% of campus placement interviews include questions from C or C++. Question: Explain the difference between near, far, and huge pointers. Let us now have a look at the Advanced C Programming interview questions. Answer: In a 32 bit operating system, integers are stored as 4 bytes. The major difference between FOR and WHILE loop are as follows: Allocations can be resized using realloc. Explicit type casting - Unlike implicit type conversion, explicit type casting is performed by the programmer. What is C#? Question: What can be understood from the null pointer and a dangling pointer? The operating system updates it automatically. To use the far pointer, it is required to: Answer: auto is the default storage class of all the variables declared inside a code block or function. It can be created as: A pointer can be used as a replacement for the variable value using ‘*’ symbol. as attributes and functions can be something like isSecondHand() or isAutomatic() etc. Each member variable of a struct can store different data, and they all can be used at once. Question: Elaborate the process by which we can apply quote character (and) in output screen in C programming? Each of the functions or modules involved in modular programming has everything required for executing a single aspect of the desired functionality of the entire program. ", ¬nullpointer); printf ("\nNull pointer 1 has no valid address. Answer: Union basically allows the user to store multiple types of data in a single unit and it is a kind of user-defined data. Answer: To control a program from outside, we supply the command line argument parameter to the program when the main method is invoked. sum = totalsum (22, 24, 28);         // Actual parameters are numbers. Answer: Yes C language is known to be a middle-level language. Answer: Question: Distinguish between the header file within angular braces < > and double quotes “. C programming language is … "); Not null pointer has stored the address 2054804456. void *vp = &x; // Here the void pointer is holding address of int x, vp = &b; // Here the void pointer is holding address of char b, int totalsum(int a, int b, int c)          // Formal parameters, int a = 22;    int m = 24; int p = 28;      // Actual parameters. Top Interview Questions and Answers in Embedded C. 1) What is an Embedded C? I have had a variety of customer service opportunities, through which I was able to have fewer returned products and increased repeat customers, when compared with co-workers. We have a variety of advertising options which would give your courses an instant visibility to a very large set of developers, designers and data scientists. The first one is one dimension array and other is a multidimensional array. Question: Explain the meaning and role of the auto keyword in the C programming? Answer: The difference between call by value and call by reference in C language are as follows: By closing this banner, scrolling this page, clicking a link or continuing to browse otherwise, you agree to our Privacy Policy, Black Friday Offer - C Programming Training (3 Courses, 5 Project) Learn More, 3 Online Courses | 5 Hands-on Projects | 34+ Hours | Verifiable Certificate of Completion | Lifetime Access, C++ Training (4 Courses, 5 Projects, 4 Quizzes), Java Training (40 Courses, 29 Projects, 4 Quizzes), Software Development Course - All in One Bundle. For the same data type, a structure requires more memory than a union. There is only one declaration of the extern variable. If no value is stored in an auto variable, then it gets a garbage value. Answer: We can use the extern storage specifier for resolving the scope of a global symbol. We use a static variable to: Answer: Recursion is the process when a function calls itself, directly or indirectly. This helps in making efficient use of the memory space in a program. Find top C developers today. Download PDF. Question: What are the advantages of using C language over other programming languages? Some compilers will result in 16 and 20, while others will produce 16 and 25. Every header file contains a set of predefined functions, meant to make programming in C simpler. Question: When do we use the register keyword? In actual, the #, called the include guard, preceding a header file ensures that it is included only once during the compilation process. Note that the function to be called is decided during compile time. In practice, the pointer must be dereferenced before it is cast. Password reset link will be sent to your email. So, the data type that a void pointer points to can be anything. For example: if we use ( x ++ ), then this means to give command of increment the value of x with a rate of 1. So, it can inherit the class Car. A static variable is initially initialized to 0. Answer: When the one loop gets into the other loop and starts running that loop is called nested loop. It was developed by American computer scientist Dennis M. Ritchie at Bell Laboratories. Suggest a workaround. These variables are defined outside a function or code block. • C has a rich set of operators. • Static Linking consumes more memory and disk space while Dynamic Linking saves memory and space. then both are pointing to the same variable. When the value is updated, it gets assigned to the static variable. Question: Briefly explain the various file opening modes in C? Question: Please explain the concept of Dangling Pointer in C?

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