Third unit test
Set-1
Section a
1.
Define function? Explain the use of return
statement?
Ans:
The return statement is used for two purposed, they are:
·
To return a value to the calling function.
Syntax: return(expression);
Ex: 1)return(c); //returning a variable
2) return(x+y); //returning
the expression ie.addition of variables x +y
To return the control back to the calling the function
Syntax: return;
1.
A return statement can appear any where in the
function
2.
A function can have no of return statements in
the function but one return statement
can be executed
3.
A return statement can return only one value at
a time
2.
Write any difference b/w address & dereferencing
operators?
3.
What is structure explain with an example?
Section b
4.
Explain various types of function with example
programs?
5.
Explain about various dynamic memory management
functions?
6.
What is recursion? Write a program to find the
factorial of a given number using recursion?
Set-2
1.
Distinguish between actual and formal
parameters?
Ans:
Actual parameters
|
Formal parameters
|
1.
The parameters specified in the function call
are called as actual parameters
|
The parameters specified in the function declaration are called
formal parameters
|
2.
Sending the value or variable or expression from
the function call
|
Receiving the
value or variable from the actual parameters
|
3. Ex:
swap(a,b); or swap(2,3);
Here a,b or 2,3 are actual
parameters
|
Ex: void swap(int
a, int b)
{
}
Here a,b are
formal parameters
|
4.
Passing the parameters a,b to swap()
|
Here a,b are
receiving the value or variables
|
5.
Actual parameters may be variable,value or
expression, or structure,address
|
It must be variable
or structure or array but not values or expressions
|
2.
What is pointer? List the advantages of pointers
Ans:
1.
We can return more than one value from a
function
2.
Indirect accessing
3.
It provides dynamic memory management
4.
To pass arrays and strings more conveniently from
one function to another function
5.
It provides program execution speed
6.
To manipulate arrays more easily by moving
pointers to them instead of moving the arrays themselves
3.
Differentiate between array & structure?
Ans:
Structure
|
Array
|
1. It
is a collection of elements(variables) of different data types
|
1. It
is a collection of elements of same data type
|
2. We
have to use .(dot) operator or -> (cap) operator for accessing
|
2. Subscript
for accessing array elements
|
3.
Syntax:
struct tag
{
Datatype memeber1;
Datatype member2;
…….
};
|
3. Declaration
of array:
Datatype arrayname[size]={list
of elements separated by comma};
|
4. Example:
struct student
{
int rollno;
char name[10];
float avg;
};
struct student stud={01,”raj\0”,90.25};
|
4. int
a[5]={1,2,3,4,5};
|
Section
-b
4.
Explain call by value and call by reference with
example programs?
5.
Explain about addressing and dereferencing
operators
ans:
Address operator
|
Dereferencing operators
|
1. Address
operator is &
Ex: &a where a is a variable
|
Dereferencing operator is *
Example: *a where a is pointer
|
2. It
is used to initialize pointer variable
|
It is used to declare a pointer
varialbe
|
3. It
is a unary operator
|
It is also unary operator
|
4. It
returns the address of variable
|
It returns the value at that address
|
6.
What are the various storage classes in c
explain?
Set-3
1.
What is self referential structure?
2.
List various betwise operators in c?
3.
List various I/O function with files?
Section-B
4.
Explain various types of functions with example
with example programs
5.
Explain about various dynamic memory management
functions with examples?
6.
What is recursion? Write a c program to find
factorial of a given number using recursion?
