C Multiple Choice Questions And Answers
Here you can find C Multiple Choice Questions and Answers.
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C Multiple Choice Questions and Answers - Chapters
- Preprocessor Questions & Answers
- Conditional Expressions Questions & Answers
- Constants Questions and Answers
- Data Types Questions and Answers
- Declarations Questions and Answers
- File Access Questions and Answers
- Pointers Questions and Answers
- Standard Input and Output Questions & Answers
- Storage Management Questions & Answers
- Typedef Questions & Answers
- Variable Names Questions & Answers
- Structures, Unions, Bit-fields Questions & Answers
- C Functions Questions & Answers
- C Data Types Questions & Answers
- C Operators Questions & Answers
- Control Flow Statements Questions & Answers
Preprocessor Questions & Answers
1. Property which allows to produce different executable for different platforms in C is called?
Preprocessor Questions & Answers
2. #include is called
Preprocessor Questions & Answers
3. C preprocessors can have compiler specific features.
Preprocessor Questions & Answers
4. C preprocessor is conceptually the first step during compilation.
Preprocessor Questions & Answers
5. Preprocessor feature that supply line numbers and file names to compiler is called?
Conditional Expressions Questions & Answers
1. What is the output of this C code?
int main()
{
int x = 2, y = 0;
int z = (y++) ? y == 1 && x : 0;
printf("%d\n", z);
return 0;
}
Conditional Expressions Questions & Answers
2. What is the output of this C code?
int main()
{
int x = 1;
int y = x == 1 ? getchar(): 2;
printf("%d\n", y);
}
Conditional Expressions Questions & Answers
3. What is the output of this C code?
int main()
{
int x = 1;
short int i = 2;
float f = 3;
if (sizeof((x == 2) ? f : i) == sizeof(float))
printf("float\n");
else if (sizeof((x == 2) ? f : i) == sizeof(short int))
printf("short int\n");
}
Conditional Expressions Questions & Answers
4. What is the output of this C code?
int main()
{
int a = 2;
int b = 0;
int y = (b == 0) ? a :(a > b) ? (b = 1): a;
printf("%d\n", y);
}
Conditional Expressions Questions & Answers
5. What is the output of this C code?
int main()
{
int y = 1, x = 0;
int l = (y++, x++) ? y : x;
printf("%d\n", l);
}
Constants Questions and Answers
1. What is the output of this C code?
int main()
{
enum {ORANGE = 12, MANGO, BANANA = 11, APPLE};
printf("APPLE = %d\n", APPLE);
}
Constants Questions and Answers
2. What is the output of this C code?
int main()
{
printf("C programming %s", "Class by\n%s AllIndiaExams", "SUPER");
}
Constants Questions and Answers
3. For the following code snippet:
char *str = “AllIndiaExams.in\0? “training classes”;
The character pointer str holds reference to string:
Constants Questions and Answers
4. What is the output of this C code?
#define a 20
int main()
{
const int a = 50;
printf("a = %d\n", a);
}
Constants Questions and Answers
5. What is the output of this C code?
int main()
{
int var = 010;
printf("%d", var);
}
Data Types Questions and Answers
1. Comment on the output of this C code?
int main()
{
int a[5] = {1, 2, 3, 4, 5};
int i;
for (i = 0; i < 5; i++)
if ((char)a[i] == '5')
printf("%d\n", a[i]);
else
printf("FAIL\n");
}
Data Types Questions and Answers
2. The format identifier ‘%i’ is also used for _____ data type?
Data Types Questions and Answers
3. Which data type is most suitable for storing a number 65000 in a 32-bit system?
Data Types Questions and Answers
4. Which of the following is a User-defined data type?
Data Types Questions and Answers
5. What is the size of an int data type?
Declarations Questions and Answers
1. What is the output of this C code?
void foo(const int *);
int main()
{
const int i = 10;
printf("%d ", i);
foo(&i);
printf("%d", i);
}
void foo(const int *i)
{
*i = 20;
}
Declarations Questions and Answers
2. Comment on the output of this C code?
int main()
{
const int i = 10;
int *ptr = &i;
*ptr = 20;
printf("%d\n", i);
return 0;
}
Declarations Questions and Answers
3. What is the output of this C code?
int main()
{
j = 10;
printf("%d\n", j++);
return 0;
}
Declarations Questions and Answers
4. Does this compile without error?
int main()
{
for (int k = 0; k < 10; k++);
return 0;
}
Declarations Questions and Answers
5. Does this compile without error?
int main()
{
int k;
{
int k;
for (k = 0; k < 10; k++);
}
}
File Access Questions and Answers
1. The first and second arguments of fopen are?
File Access Questions and Answers
2. For binary files, a ___ must be appended to the mode string.
File Access Questions and Answers
3. If there is any error while opening a file, fopen will return?
File Access Questions and Answers
4. Which is true about getc.getc returns?
File Access Questions and Answers
5. When a C program is started, O.S environment is responsible for opening file and providing pointer for that file?
Pointers Questions and Answers
1. What is the output of this C code?
int main()
{
char *p = NULL;
char *q = 0;
if (p)
printf(" p ");
else
printf("nullp");
if (q)
printf("q\n");
else
printf(" nullq\n");
}
Pointers Questions and Answers
2. What is the output of this C code?
int main()
{
int i = 10;
void *p = &i;
printf("%d\n", (int)*p);
return 0;
}
Pointers Questions and Answers
3. What is the output of this C code?
int main()
{
int i = 10;
void *p = &i;
printf("%f\n", *(float*)p);
return 0;
}
Pointers Questions and Answers
4. What is the output of this C code?
int *f();
int main()
{
int *p = f();
printf("%d\n", *p);
}
int *f()
{
int *j = (int*)malloc(sizeof(int));
*j = 10;
return j;
}
Pointers Questions and Answers
5. What is the output of this C code?
int *f();
int main()
{
int *p = f();
printf("%d\n", *p);
}
int *f()
{
int j = 10;
return &j;
}
Standard Input and Output Questions & Answers
1. Which among the following is odd one out?
Standard Input and Output Questions & Answers
2. For a typical program, the input is taken using.
Standard Input and Output Questions & Answers
3. What does the following command line signify?
Standard Input and Output Questions & Answers
4. What is the default return-type of getchar()?
Standard Input and Output Questions & Answers
5. The value of EOF is_____.
Storage Management Questions & Answers
1. The function ____ obtains block of memory dynamically.
Storage Management Questions & Answers
2. void * malloc(size_t n) returns:
Storage Management Questions & Answers
3. calloc() returns a storage that is initialized to.
Storage Management Questions & Answers
4. In function free(p), p is a:
Storage Management Questions & Answers
5. What is the output of this C code?
void main()
{
char *p = calloc(100, 1);
p = "welcome";
printf("%s\n", p);
}
Typedef Questions & Answers
1. The correct syntax to use typedef for struct is.
Typedef Questions & Answers
2. For the following expression to work, which option should be selected.
string p = “HELLO”;
Typedef Questions & Answers
3. Which of the given option is the correct method for initialization?
typedef char *string;
Typedef Questions & Answers
4. Which of the following is FALSE about typedef?
Typedef Questions & Answers
5. typedef which of the following may create problem in the program?
Variable Names Questions & Answers
1. C99 standard guarantees uniqueness of ____ characters for internal names.
Variable Names Questions & Answers
2. C99 standard guarantess uniqueness of _____ characters for external names.
Variable Names Questions & Answers
3. Which of the following is not a valid variable name declaration?
Variable Names Questions & Answers
4. Which of the following is not a valid variable name declaration?
Variable Names Questions & Answers
5. Variable names beginning with underscore is not encouraged. Why?
Structures, Unions, Bit-fields Questions & Answers
1. Which of the following are themselves a collection of different data types?
Structures, Unions, Bit-fields Questions & Answers
2. User-defined data type can be derived by___________.
Structures, Unions, Bit-fields Questions & Answers
3. Which operator connects the structure name to its member name?
Structures, Unions, Bit-fields Questions & Answers
4. Which of the following cannot be a structure member?
Structures, Unions, Bit-fields Questions & Answers
5. Which of the following structure declaration will throw an error?
C Functions Questions & Answers
1. What is the output of this C code?
int main()
{
void foo(), f();
f();
}
void foo()
{
printf("2 ");
}
void f()
{
printf("1 ");
foo();
}
C Functions Questions & Answers
2. What is the output of this C code?
int main()
{
void foo();
void f()
{
foo();
}
f();
}
void foo()
{
printf("2 ");
}
C Functions Questions & Answers
3. What is the output of this C code?
void foo();
int main()
{
void foo();
foo();
return 0;
}
void foo()
{
printf("2 ");
}
C Functions Questions & Answers
4. What is the output of this C code?
void foo();
int main()
{
void foo(int);
foo(1);
return 0;
}
void foo(int i)
{
printf("2 ");
}
C Functions Questions & Answers
5. What is the output of this C code?
void foo();
int main()
{
void foo(int);
foo();
return 0;
}
void foo()
{
printf("2 ");
}
C Data Types Questions & Answers
1. Comment on the output of this C code?
int main()
{
int a[5] = {1, 2, 3, 4, 5};
int i;
for (i = 0; i < 5; i++)
if ((char)a[i] == '5')
printf("%d\n", a[i]);
else
printf("FAIL\n");
}
C Data Types Questions & Answers
2. The format identifier ‘%i’ is also used for _____ data type?
C Data Types Questions & Answers
3. Which data type is most suitable for storing a number 65000 in a 32-bit system?
C Data Types Questions & Answers
4. Which of the following is a User-defined data type?
C Data Types Questions & Answers
5. What is the size of an int data type?
C Operators Questions & Answers
1. What is the output of this C code?
int main()
{
int i = -5;
int k = i %4;
printf("%d\n", k);
}
C Operators Questions & Answers
2. What is the output of this C code?
int main()
{
int i = 5;
int l = i / -4;
int k = i % -4;
printf("%d %d\n", l, k);
return 0;
}
C Operators Questions & Answers
3. What is the output of this C code?
int main()
{
int i = 7;
i = i / 4;
printf("%d\n", i);
return 0;
}
C Operators Questions & Answers
4. What is the value of x in this C code?
void main()
{
int x = 4 *5 / 2 + 9;
}
C Operators Questions & Answers
5. What is the output of this C code?
void main()
{
int x = 4.3 % 2;
printf("Value of x is %d", x);
}
Control Flow Statements Questions & Answers
1. Which keyword can be used for coming out of recursion?
Control Flow Statements Questions & Answers
2. What is the output of this C code?
int main()
{
int a = 0, i = 0, b;
for (i = 0;i < 5; i++)
{
a++;
continue;
}
}
Control Flow Statements Questions & Answers
3. What is the output of this C code?
int main()
{
int a = 0, i = 0, b;
for (i = 0;i < 5; i++)
{
a++;
if (i == 3)
break;
}
}
Control Flow Statements Questions & Answers
4. The keyword ‘break’ cannot be simply used within:
Control Flow Statements Questions & Answers
5. Which keyword is used to come out of a loop only for that iteration?
