C Fundamentals - Codebaji

Welcome to your Introduction Of C

1) founder of c language

Dennis Ritchie

Bjarne Stroustrup

James Gosling

Guido van Rossum

2) What is C language?

A programming language used for web development

A high-level programming language for scientific calculation

A general purpose programming language

A markup language for creating web pages

3) What is the difference between C and C++?

C is a procedural programming language while c++ is OOP based.

C is statically typed language while c++ is dynamically typed.

C has simpler syntax compared to c++.

C supports function overloading, which is not available in c++.

4) What are the features of the C language?

Supports low level programming

Supports object-oriented programming

Automatic memory management

Designed for web development

5) What is the use of the printf() and scanf() functions?

printf() is used for input operations while scanf() is used for output operations

printf() is used for output operations while scanf() is used for input operations

Both printf() and scanf() is used for output operations

Both printf() and scanf() is used for input operations

6) What is the difference between the local variable and global variable in C?

Local variables are declared within a function and have a limited scope, while global variables are declared outside of any function and have a global scope.

Local variables can be accessed from any part of the program, while global variables can only be accessed within the function they are declared.

Local variables are stored in the stack memory, while global variables are stored in the heap memory.

Local variables are initialized automatically, while global variables need to be explicitly initialed.

7) What is the use of a static variables in C?

It allows sharing data between different source files

It ensures that the variable retains its value between function calls

It allows creating variables with a fixed value

It restricts the variable's visibility to the current function only

8) What is the use of the function in C?

It allows reusing code and improves code modularity

It enables defining data structures

It provides input and output operations

It is used to declare variables

9) What is the difference between call by value and call by reference in C?

Call by value passes the value of the actual parameters to the function, while call by reference passes the address of the actual parameter

Call by value creates a copy of the actual parameter, while call by reference directly operates on the actual parameter

Call by value can only be used with basic data types, while call by reference is suitable for complex data structures

Call by value is more efficient than call by reference

10) What is recursion in C?

It is a process of dividing a large problem into smaller subproblems

It is a looping construct used to repeat a set of statements

It is a technique used to handle exceptions in C

It is a sorting algorithm used to arrange elements in ascending order

11) What is an array in C?

It is a data structure used to store multiple values of the same data type

It is a collection of functions

It is a control structure used to iterate over a set of statements

It is a memory allocation technique used to reserve a block of memory

12) What is a pointer in C?

It is a data type used to store test strings

It is a control structure used to manage memory dynamically

It is a type of variable that stores the memory address of another variable

It is a function used to modify the access permissions of a file

13) What is the usage of the pointer in C?

Pointers are used for dynamic memory allocation and deallocation

Pointers are used for defining new data types

Pointers are used for string manipulation

Pointers are used for declaring and initializing variables

14) What is a NULL pointer in C?

A pointer that is assigned the value zero or NULL

A pointer that points to an invalid memory address

A pointer that points to the first element of an array

A pointer that stores the size of an array

15) What is a far pointer in C?

A pointer that can be used to access memory beyond the segment it is associated with

A pointer that is used to allocate and deallocate dynamic memory

A pointer that stores the size of a large array

A pointer that points to the last element of an array

16) What is a dangling pointer in C?

A pointer that points to a memory location that has been deallocated of freed

A pointer that has not been initialized with any memory address

A pointer that points to an inaccessible memory location

A pointer that is declared with dangling keyword

17) What is a pointer to pointer in C?

A pointer that stores the address of another pointer

A pointer that can be dereferenced multiple times

A pointer that points to an array of pointers

A pointer that is used to access data structures

18) What is static memory allocation in C?

It is a memory allocation technique where memory is allocated and deallocated at compile-time

It is a memory allocation technique where memory is allocated and deallocated at runtime

It is a memory allocation technique where memory is automatically managed by the operating system

It is a memory allocation technique where memory is allocated and deallocated by the programmer using specific keywords or functions

19) What is dynamic memory allocation in C?

It is a memory allocation technique where memory is allocated and deallocated at runtime

It is a memory allocation technique where memory is allocated and deallocated at compile-time

It is a memory allocation technique where memory is automatically managed by the operating system

It is a memory allocation technique where memory is allocated and deallocated by the programmer using specific keywords or functions

20) What functions are used for dynamic memory allocation in the C language?

malloc() and calloc()

alloc() and dealloc()

allocate() and release()

new() and delete()

21) What is the difference between malloc() and calloc() functions in C?

malloc() allocates memory without initializing the allocated memory block, while calloc() initializes the allocated memory block to zero

malloc() allocates memory for single elements, while calloc() is used for allocating memory for arrays

malloc() automatically manages the allocated memory, while calloc() requires explicit deallocation

malloc() is used for static memory allocation, while calloc() is used for dynamic memory allocation

22) What is structure in C?

It is a data type that can store multiple variables of different types

It is a control structure used to iterate over a set of statements

It is a type of function that return a value

It is a keyword used to declare variables that have automatic storage duration

23) What is a union in C?

It is a data structure that allows storing different types of data in the same memory location

It is a control structure used to make decisions based on certain conditions

It is a type of function that can be called recursively

It is a keyword used to declare variables that are only accessible within the block where they are defined

24) What is the auto keyword in C?

It is a keyword used to declare variables that have automatic storage duration

It is a keyword used to define the entry point of a C program

It is a keyword used to indicate the beginning of a loop

It is a keyword used to specify the scope of a variable

25) What is the purpose of the sprintf() function in C?

It is used to read formatted input from the user

It is used to write formatted output to a string

It is used to compare two strings

It is used to allocate memory dynamically

You Might Also Like

Introduction To Computer