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- Question
How would you round off a value from 1.66 to 2.0?
Options- A. ceil(1.66)
- B. floor(1.66)
- C. roundup(1.66)
- D. roundto(1.66)
- Correct Answer
- ceil(1.66)
Explanation/* Example for ceil() and floor() functions: */ #include<stdio.h> #include<math.h> int main() { printf("\n Result : %f" , ceil(1.44) ); printf("\n Result : %f" , ceil(1.66) ); printf("\n Result : %f" , floor(1.44) ); printf("\n Result : %f" , floor(1.66) ); return 0; } // Output: // Result : 2.000000 // Result : 2.000000 // Result : 1.000000 // Result : 1.000000 - 1. What will be the output of the program?
#include<stdio.h> int fun(int(*)()); int main() { fun(main); printf("Hi\n"); return 0; } int fun(int (*p)()) { printf("Hello "); return 0; }
Options- A. Infinite loop
- B. Hi
- C. Hello Hi
- D. Error Discuss
- 2. Point out the error, if any in the while loop.
#include<stdio.h> int main() { int i=1; while() { printf("%d\n", i++); if(i>10) break; } return 0; }
Options- A. There should be a condition in the while loop
- B. There should be at least a semicolon in the while
- C. The while loop should be replaced with for loop.
- D. No error Discuss
- 3. What will be the output of the program in Turbo C?
#include<stdio.h> int main() { char str[10] = "India"; str[6] = "CURIOUSTAB"; printf("%s\n", str); return 0; }
Options- A. India CURIOUSTAB
- B. CURIOUSTAB
- C. India
- D. Error Discuss
- 4. Bitwise | can be used to multiply a number by powers of 2.
Options- A. Yes
- B. No Discuss
- 5. By default a real number is treated as a
Options- A. float
- B. double
- C. long double
- D. far double Discuss
- 6. In the following program where is the variable a getting defined and where it is getting declared?
#include<stdio.h> int main() { extern int a; printf("%d\n", a); return 0; } int a=20;
Options- A. extern int a is declaration, int a = 20 is the definition
- B. int a = 20 is declaration, extern int a is the definition
- C. int a = 20 is definition, a is not defined
- D. a is declared, a is not defined Discuss
- 7. The library function used to find the last occurrence of a character in a string is
Options- A. strnstr()
- B. laststr()
- C. strrchr()
- D. strstr() Discuss
- 8. Point out the error in the following program.
#include<stdio.h> #include<stdarg.h> fun(...); int main() { fun(3, 7, -11.2, 0.66); return 0; } fun(...) { va_list ptr; int num; va_start(ptr, n); num = va_arg(ptr, int); printf("%d", num); }
Options- A. Error: fun() needs return type
- B. Error: ptr Lvalue required
- C. Error: Invalid declaration of fun(...)
- D. No error Discuss
- 9. Which of the following function sets first n characters of a string to a given character?
Options- A. strinit()
- B. strnset()
- C. strset()
- D. strcset() Discuss
- 10. If the two strings are identical, then strcmp() function returns
Options- A. -1
- B. 1
- C. 0
- D. Yes Discuss
More questions
Correct Answer: Hello Hi
Correct Answer: There should be a condition in the while loop
Explanation:
The while() loop must have conditional expression or it shows "Expression syntax" error.
Example: while(i > 10){ ... }
Correct Answer: Error
Explanation:
str[6] = "CURIOUSTAB"; - Nonportable pointer conversion.
Correct Answer: No
Correct Answer: double
Explanation:
In computing, 'real number' often refers to non-complex floating-point numbers. It include both rational numbers, such as 42 and 3/4, and irrational numbers such as pi = 3.14159265...
When the accuracy of the floating point number is insufficient, we can use the double to define the number. The double is same as float but with longer precision and takes double space (8 bytes) than float.
To extend the precision further we can use long double which occupies 10 bytes of memory space.
Correct Answer: extern int a is declaration, int a = 20 is the definition
Explanation:
- During declaration we tell the datatype of the Variable.
- During definition the value is initialized.
Correct Answer: strrchr()
Explanation:
Declaration: char *strrchr(const char *s, int c);
It scans a string s in the reverse direction, looking for a specific character c.
Example:
#include <string.h>
#include <stdio.h>
int main(void)
{
char text[] = "I learn through CuriousTab.com";
char *ptr, c = 'i';
ptr = strrchr(text, c);
if (ptr)
printf("The position of '%c' is: %d\n", c, ptr-text);
else
printf("The character was not found\n");
return 0;
}
Output:
The position of 'i' is: 19
Correct Answer: Error: Invalid declaration of fun(...)
Explanation:
There is no fixed argument in the definition
fun()
Correct Answer: strnset()
Explanation:
Declaration:
char *strnset(char *s, int ch, size_t n); Sets the first n characters of s to ch
#include <stdio.h>
#include <string.h>
int main(void)
{
char *string = "abcdefghijklmnopqrstuvwxyz";
char letter = 'x';
printf("string before strnset: %s\n", string);
strnset(string, letter, 13);
printf("string after strnset: %s\n", string);
return 0;
}
Output:
string before strnset: abcdefghijklmnopqrstuvwxyz
string after strnset: xxxxxxxxxxxxxnopqrstuvwxyz
Correct Answer: 0
Explanation:
Declaration: strcmp(const char *s1, const char*s2);
The strcmp return an int value that is
if s1 < s2 returns a value < 0
if s1 == s2 returns 0
if s1 > s2 returns a value > 0
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