C programming Questions & Answers (Compiled from UPSC, SSC ,PSC ,IBPS previous question papers)

What is wild pointer in c
a pointer which we need to write in future
a pointer which has bad naming convention
a pointer which has no limit
a point which has not initialized

Size of void pointer is
1 byte
2 byte
4 byte
8 byte

Any type of modification on the parameter inside the function will reflect in actual variable value can be related to
call by value
call by reference
both of above
none of above
Answer And Expla

What is prototype of a function in C
It is the return type of a function
It is the return data of the function
It is declaration of a function
It is a datatype

Disadvantage of array in C is
We can easily access each element
It is necessary to declare too many variables
It can store only one similar type of data
None of above

Wild pointer in C
if pointer is pointing to a memory location from where variable has been deleted
if pointer has not been initialized
if pointer has not defined properly
if pointer pointing to more than one variable

What is dangling pointer in c
if pointer is pointing to a memory location from where variable has been deleted
if pointer is assigned to more than one variable
if pointer is not defined properly
none of above

Which is invalid name of identifier
world
addition23
test_name
factorial

Adding to a pointer that points to an array will
Cause an error
Increase the value of the element that the pointer is pointing to
Cause the pointer to point to the next element in the array
None of above

What is true about fputs function
write to a file
takes two parameters
requires a file pointer
all of above

What is correct order of precedence in C
Addition, Division, Modulus
Addition, Modulus, Division
Multiplication, Substration, Modulus
Modulus, Multiplication, Substration

A variable in c
must have a valid datatype
must have a name starting with a character
All of above

printf() belongs to which library of c
stdlib.h
stdio.h
stdout.h
stdoutput.h

UML meaning is
Unique modeling language
Unified modeling language
Unified modern language
Unified master laqnguage

Structures can be used
to hold different datatypes
have pointers to structures
to assign to one another
all of above

A member is a
Variable in a structure
Datatype of structure
Structure pointer
None of above

What among following is true about stack
stack cannot reuse its memory
all elements are of different datatypes
all operation done at one end
none of above

Difference between structure and union is
We can define functions within structures but not within a union
We can define functions within union but not within a structure
The way memory is allocated
There is no difference

What is the purpose of getc()
read a character from STDIN
read a character from a file
read all file
read file random

The compiler in C ignores all text till the end of line using
//
/
*/
none of above

rand() function returns
float value
integer value
any type
none of above

Out of following program :
float x = 10.7;
int i;

i = (int) x;
print i;
null
error
10
garbage value
Answer And Ex

What is use of in c
used to insert a vertical tab
used to insert a tab
places cursor at the end of line
places cursor at the start of line

Which of the following below is/are valid C keywords
integer
int
null
none of above

1 2

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C programming Question Answers, PSC, UPSC, IBPS, SSC Previous Papers