Q1 . Explain memory management in C?

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SOLUTION

We can allocate the memory using functions like malloc(),calloc() and the memory that has been done with can be freed using free() function.

Q2 . What is the use of malloc?

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SOLUTION

malloc allocates the memory

Q3 . what is the use of calloc?

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SOLUTION

calloc allocates and intialises the memory.

Q4 . what is the use of free()?

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SOLUTION

free() is used to release all the memory that has been allocated by malloc().

Q5 . Differneces between structures and unions?

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SOLUTION

structures and unions are complex data types containing a bunch of related data of different data types

The data share memory

main differnce is that

structures allocate memory for each variable whereas union allocates memory for its largest data.

Q6 . What is the difference between structures and classes?

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SOLUTION

The members of a class are private by default and for strucure they are public.

Classes can be inherited structures cannot.

classes can have constructors and destructors where as structures cannot.

Q7 . How to use arrays in C?

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SOLUTION

Arrays are collection of data.In an array all the data are of the same data types.Arrays can be of single int a[10] or two dimensional arrays a[2][3].

Q8 . what are recursive functions?

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SOLUTION

Recursive functions are the ones in which a function invokes itself.

for example fact(a){ fact(a);}

Q9 . what are jump statements?

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SOLUTION

Jump statements are the ones that help in changing the flow wihtout any condition

some jump statements are goto,break,continue

Q10 . what are control statements?

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SOLUTION

The control statements are used to decide the flow or execution of the statements.

main types of control statemensts are loops and conditional statements.

loops like for,while,do while

conditional statements like if else,ternary operators.

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