Question 21:
Why is function overloading not supported in C programming, and what are alternative approaches to achieve similar functionality?
Function overloading allows multiple functions with the same name but
different parameter lists. C does not support function overloading
natively, as it doesn't perform name mangling like C++. To achieve
similar functionality, developers often use function naming conventions
that incorporate parameter information or use varargs (variable
arguments) functions.
Question 22:
Explain the process of declaration and initialization of arrays in C programming.
In C, arrays are declared by specifying the data type of the elements
and the array name followed by square brackets containing the size of
the array. Initialization can be done at the time of declaration by
enclosing the initial values within curly braces.
Question 23:
How do you access elements in an array in C, and what is the significance of array indexing?
Array elements in C are accessed using square brackets containing the
index of the element to be accessed. Array indexing starts from 0, with
the first element at index 0, second at index 1, and so on. Proper array
indexing is crucial for accessing elements correctly and avoiding
out-of-bounds errors.
Question 24:
What are multi-dimensional arrays in C, and how are they declared and accessed?
Multi-dimensional arrays in C are arrays with more than one dimension.
They are declared by specifying multiple sets of square brackets, with
each set indicating the size of each dimension. Accessing elements in
multi-dimensional arrays involves using multiple indices corresponding
to each dimension.
Question 25:
How are arrays passed as function arguments in C, and what are the implications of passing arrays to functions?
In C, arrays are typically passed to functions by passing the array
name as an argument. However, arrays decay into pointers when passed to
functions, losing their size information. Therefore, functions that
operate on arrays need to either explicitly pass the size of the array
or use sentinel values to determine the end of the array.
Question 26:
Explain the concept of strings in C and how they are represented using character arrays.
In C, strings are represented as arrays
of characters terminated by a null character (''). String literals are enclosed in
double quotes, and character arrays can also store strings. Various
string handling functions in C, like strlen(), strcpy(), strcat(), etc.,
operate on these character arrays to perform string manipulation.
Question 27:
What are some commonly used string handling functions in C, and how are they used?
C provides several built-in string handling functions, such as
strlen(), strcpy(), strcat(), and strcmp(). These functions allow
programmers to perform operations like finding the length of a string,
copying strings, concatenating strings, and comparing strings, making
string manipulation tasks more convenient and efficient.
Question 28:
What is a pointer in C programming, and how does it differ from regular variables?
A pointer in C is a variable that stores the memory address of another
variable. Unlike regular variables that store data directly, pointers
hold addresses, allowing for indirect access to memory locations.
Question 29:
Explain pointer arithmetic in C, including incrementing and decrementing pointers, and how it relates to array traversal.
Pointer arithmetic in C involves performing arithmetic operations such
as addition and subtraction on pointer variables. When applied to
arrays, pointer arithmetic allows for efficient traversal and
manipulation of array elements by incrementing or decrementing the
pointers.
Question 30:
How are pointers and arrays related in C programming, and why are they often used together?
In C, arrays decay into pointers when passed to functions or assigned
to pointer variables. This close relationship between pointers and
arrays allows for efficient array manipulation using pointer arithmetic
and facilitates dynamic memory allocation and deallocation.
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