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- Question
What will be the output of the program?
#include<stdio.h> int main() { int X=40; { int X=20; printf("%d ", X); } printf("%d\n", X); return 0; }
Options- A. 40 40
- B. 20 40
- C. 20
- D. Error
- Correct Answer
- 20 40
ExplanationIn case of a conflict between a local variable and global variable, the local variable gets priority. - 1. What is the output of the program
#include<stdio.h> int main() { struct emp { char name[20]; int age; float sal; }; struct emp e = {"Tiger"}; printf("%d, %f\n", e.age, e.sal); return 0; }
Options- A. 0, 0.000000
- B. Garbage values
- C. Error
- D. None of above Discuss
- 2. What is the output of the program
#include<stdio.h> int main() { int x = 10, y = 20, z = 5, i; i = x < y < z; printf("%d\n", i); return 0; }
Options- A. 0
- B. 1
- C. Error
- D. None of these Discuss
- 3. What is the output of the program in Turbo C (in DOS 16-bit OS)?
#include<stdio.h> int main() { char *s1; char far *s2; char huge *s3; printf("%d, %d, %d\n", sizeof(s1), sizeof(s2), sizeof(s3)); return 0; }
Options- A. 2, 4, 6
- B. 4, 4, 2
- C. 2, 4, 4
- D. 2, 2, 2 Discuss
- 4. What is the output of the program
#include<stdio.h> int main() { int a[5] = {2, 3}; printf("%d, %d, %d\n", a[2], a[3], a[4]); return 0; }
Options- A. Garbage Values
- B. 2, 3, 3
- C. 3, 2, 2
- D. 0, 0, 0 Discuss
- 5. In the following program how long will the for loop get executed?
#include<stdio.h> int main() { int i=5; for(;scanf("%s", &i); printf("%d\n", i)); return 0; }
Options- A. The for loop would not get executed at all
- B. The for loop would get executed only once
- C. The for loop would get executed 5 times
- D. The for loop would get executed infinite times Discuss
- 6. What is the output of the program?
#include<stdio.h> int main() { union a { int i; char ch[2]; }; union a u; u.ch[0] = 3; u.ch[1] = 2; printf("%d, %d, %d\n", u.ch[0], u.ch[1], u.i); return 0; }
Options- A. 3, 2, 515
- B. 515, 2, 3
- C. 3, 2, 5
- D. None of these Discuss
- 7. Which of the structure is incorrcet?
1 : struct aa { int a; float b; };2 : struct aa { int a; float b; struct aa var; };3 : struct aa { int a; float b; struct aa *var; };
Options- A. 1
- B. 2
- C. 3
- D. 1, 2, 3 Discuss
- 8.
1 : typedef long a;
extern int a c;2 : typedef long a;
extern a int c;3 : typedef long a;
extern a c;
Options- A. 1 correct
- B. 2 correct
- C. 3 correct
- D. 1, 2, 3 are correct Discuss
- 9. Which of the following operations are INCORRECT?
Options- A.
int i = 35; i = i%5; - B.
short int j = 255; j = j; - C.
long int k = 365L; k = k; - D.
float a = 3.14; a = a%3;
Discuss
- 10. Which of the structure is correct?
1 : struct book { char name[10]; float price; int pages; };2 : struct aa { char name[10]; float price; int pages; }3 : struct aa { char name[10]; float price; int pages; }
Options- A. 1
- B. 2
- C. 3
- D. All of above Discuss
Declarations and Initializations problems
Search Results
Correct Answer: 0, 0.000000
Explanation:
When an automatic structure is partially initialized remaining elements are initialized to 0(zero).
Correct Answer: 1
Explanation:
Since
x < y turns to be TRUE it is replaced by 1. Then
1 < z is compared and to be
TRUE. The 1 is assigned to
i.
Correct Answer: 2, 4, 4
Explanation:
Any pointer size is 2 bytes. (only 16-bit offset)
So, char *s1 = 2 bytes.
So, char far *s2; = 4 bytes.
So, char huge *s3; = 4 bytes.
A far, huge pointer has two parts: a 16-bit segment value and a 16-bit offset value.
So, char *s1 = 2 bytes.
So, char far *s2; = 4 bytes.
So, char huge *s3; = 4 bytes.
A far, huge pointer has two parts: a 16-bit segment value and a 16-bit offset value.
Since C is a compiler dependent language, it may give different output in other platforms. The above program works fine in Windows (TurboC), but error in Linux (GCC Compiler).
Correct Answer: 0, 0, 0
Explanation:
When an automatic array is partially initialized, the remaining elements are initialized to 0.
Correct Answer: The for loop would get executed infinite times
Explanation:
During the for loop execution scanf() ask input and then printf() prints that given input. This process will be continued repeatedly because, scanf() returns the number of input given, the condition is always true(user gives a input means it reurns '1').
Hence this for loop would get executed infinite times.
Correct Answer: 3, 2, 515
Explanation:
printf("%d, %d, %d\n", u.ch[0], u.ch[1], u.i); It prints the value of u.ch[0] = 3, u.ch[1] = 2 and it prints the value of u.i means the value of entire union size.
So the output is 3, 2, 515.
Correct Answer: 2
Explanation:
Option B gives "Undefined structure in 'aa'" error.
Correct Answer: 3 correct
Explanation:
typedef long a;
extern int a c; while compiling this statement becomes extern int long c;. This will result in to "Declaration syntax error".
extern int a c; while compiling this statement becomes extern int long c;. This will result in to "Declaration syntax error".
typedef long a;
extern a int c; while compiling this statement becomes extern long int c;. This will result in to "Too many types in declaration error".
typedef long a;
extern a c; while compiling this statement becomes extern long c;. This is a valid c declaration statement. It says variable c is long data type and defined in some other file or module.
So, Option C is the correct answer.
Correct Answer:
float a = 3.14; a = a%3;Explanation:
float a = 3.14; a = a%3; gives "Illegal use of floating point" error.
The modulus (%) operator can only be used on integer types. We have to use fmod() function in math.h for float values.
Correct Answer: 1
Explanation:
In 2 and 3 semicolon are missing in structure element.
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