C Programming MCQ - Pointers

1:   Prior to using a pointer variable it should be
A. Declared
B. Initialized
C. Both declared and initalized
D. None of these
 
 

Option: C

Explanation :
Using a pointer variable, without initializing it, will be disastrous, as it will have a garbage value.

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2:  

Consider the declaration:
char x[]="WHATIZIT";
char *y="WHATIZIT";

The output of puts(x) an puts(y) will be

A.

Will be the same

B.

Different

C.

Not related

D.

Error

 
 

Option: A

Explanation :

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3:  

Consider the declarations:
char first (int(*)(char,float));
int second(char,float);

Which of the following function invocation is valid?

A.

First(*second);

B.

First(&second);

C.

First(second);

D.

None fo these

 
 

Option: C

Explanation :

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4:   In C a pointer variable to an integer can be created by the decalaration
A. int p*;
B. int *p;
C. int +p;
D. int $p;
 
 

Option: B

Explanation :

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5:  

Which of the following is most appropriate?

A.

int*matrix; .....; free(void) matrix;

B.

int*matrix; .....; free (matrix);

C.

int*matrix; .....; if(matrix!=null) free(void*)matrix;

D.

None fo these

 
 

Option: D

Explanation :

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Syllabus Covered in this section is

  • Elements of C-Tokens
  • Identifiers
  • data types in C
  • Control structures in, C
  •  Sequence, selection and iteration(s).
  • Structured data types in C
  • Arrays, Structures, union, String, and pointers
  • Functions, Recursion
  • Parameter passing, Scope
  •  Binding, Abstract data types

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