Programming in C

Front

Which of the following is not necessary for every C program? Options: Header file, Preprocessor directive, The use of a keyword, The main function

Back

Preprocessor directive

Front

Which of the following statements is incorrect about macros?

• Macros and function calls work differently
• It is always defined in capital letters
• Macros can be undefined using #undef
• You can declare macros with arguments

Back

It is always defined in capital letters

Front

Predict the output of the following code segment: // Add stdio.h header file in below code
int main() { const int limit = 10; limit++; printf("%d", limit); return 0; }

Back

Compile error

Front

Predict the output of the following code segment: // Add stdio.h header file in below code
int main () {
char line [] = "Welcome to DataFlair tutorials on C Programming";
char string1[10], string2[10], string3[10];
sscanf (line,"%*s %*s %s %*s %*s %s %s",string1, string2, string3); printf ("%s %s %s \n", string1, string2, string3); return 0; }

Back

DataFlair C programming

Front

Which mathematical function would you use to round off 4.23 to 5?

Back

ceil(4.23)

Front

Which of the following has a global scope in the program? Options: Formal parameters, Constants, Macros, Local variables

Back

Macros

Front

Predict the output of the following code segment:
```c
// Add stdio.h header file in below code
int main()
{
int array[10] = {3, 0, 8, 1, 12, 8, 9, 2, 13, 10};
int x, y, z;
x = ++array[2];
y = array[2]++;
z = array[x++];
printf("%d %d %d", x, y, z);
return 0;
}
```

Back

10 9 10

Front

Which of the following statements about functions is false?

• The main() function can be called recursively
• Functions cannot return more than one value at a time
• A function can have multiple return statements with different return values
• The maximum number of arguments a function can take is 128

Back

The maximum number of arguments a function can take is 128

Front

Predict the output of the following code segment: // Add stdio.h header file in below code
int main() { int x = 6; int y = 4; int z; if(!x >= 5) y = 3; z = 2; printf("%d %d", z, y); return 0; }

Back

2 4

Front

What is the correct way of treating 9.81 as a long double? Options: 9.81L, 9.81LD, 9.81D, 9.81DL

Back

9.81L