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- Question
What will be the output of the program?
#include<stdio.h> int main() { unsigned char i = 0x80; printf("%d\n", i<<1); return 0; }
Options- A. 0
- B. 256
- C. 100
- D. 80
- Correct Answer
- 256
- 1. In a macro call the control is passed to the macro.
Options- A. True
- B. False Discuss
- 2. What will be the output of the program under DOS?
#include<stdio.h> int main() { char huge *near *far *ptr1; char near *far *huge *ptr2; char far *huge *near *ptr3; printf("%d, %d, %d\n", sizeof(ptr1), sizeof(**ptr2), sizeof(ptr3)); return 0; }
Options- A. 4, 4, 4
- B. 4, 2, 2
- C. 2, 8, 4
- D. 2, 4, 8 Discuss
- 3. What will be the output of the program?
#include<stdio.h> #define SQR(x)(x*x) int main() { int a, b=3; a = SQR(b+2); printf("%d\n", a); return 0; }
Options- A. 25
- B. 11
- C. Error
- D. Garbage value Discuss
- 4. Point out the error in the program.
#include<stdio.h> const char *fun(); int main() { *fun() = 'A'; return 0; } const char *fun() { return "Hello"; }
Options- A. Error: RValue required
- B. Error: Lvalue required
- C. Error: fun() returns a pointer const character which cannot be modified
- D. No error Discuss
- 5. Which statement will you add to the following program to ensure that the program outputs "CuriousTab" on execution?
#include<stdio.h> int main() { char s[] = "CuriousTab"; char t[25]; char *ps, *pt; ps = s; pt = t; while(*ps) *pt++ = *ps++; /* Add a statement here */ printf("%s\n", t); return 0; }
Options- A. *pt='';
- B. pt='\0';
- C. pt='\n';
- D. *pt='\0'; Discuss
- 6. A float occupies 4 bytes. If the hexadecimal equivalent of these 4 bytes are A, B, C and D, then when this float is stored in memory in which of the following order do these bytes gets stored?
Options- A. ABCD
- B. DCBA
- C. 0xABCD
- D. Depends on big endian or little endian architecture Discuss
- 7. To print out a and b given below, which of the following printf() statement will you use?
#include<stdio.h> float a=3.14; double b=3.14;
Options- A. printf("%f %lf", a, b);
- B. printf("%Lf %f", a, b);
- C. printf("%Lf %Lf", a, b);
- D. printf("%f %Lf", a, b); Discuss
- 8. Which of the following function is more appropriate for reading in a multi-word string?
Options- A. printf();
- B. scanf();
- C. gets();
- D. puts(); Discuss
- 9. What will be the output of the program if the array begins at address 65486?
#include<stdio.h> int main() { int arr[] = {12, 14, 15, 23, 45}; printf("%u, %u\n", arr, &arr); return 0; }
Options- A. 65486, 65488
- B. 65486, 65486
- C. 65486, 65490
- D. 65486, 65487 Discuss
- 10. What will be the output of the program in Turbo C (under DOS)?
#include<stdio.h> int main() { struct emp { char *n; int age; }; struct emp e1 = {"Dravid", 23}; struct emp e2 = e1; strupr(e2.n); printf("%s\n", e1.n); return 0; }
Options- A. Error: Invalid structure assignment
- B. DRAVID
- C. Dravid
- D. No output Discuss
More questions
Correct Answer: False
Explanation:
False, Always the macro is substituted by the given text/expression.
Correct Answer: 4, 2, 2
Correct Answer: 11
Explanation:
The macro function SQR(x)(x*x) calculate the square of the given number 'x'. (Eg: 102)
Step 1: int a, b=3; Here the variable a, b are declared as an integer type and the variable b is initialized to 3.
Step 2: a = SQR(b+2); becomes,
=> a = b+2 * b+2; Here SQR(x) is replaced by macro to x*x .
=> a = 3+2 * 3+2;
=> a = 3 + 6 + 2;
=> a = 11;
Step 3: printf("%d\n", a); It prints the value of variable 'a'.
Hence the output of the program is 11
Correct Answer: Error: fun() returns a pointer const character which cannot be modified
Correct Answer: *pt='\0';
Correct Answer: Depends on big endian or little endian architecture
Correct Answer: printf("%f %lf", a, b);
Explanation:
To print a float value, %f is used as format specifier.
To print a double value, %lf is used as format specifier.
Therefore, the answer is printf("%f %lf", a, b);
Correct Answer: gets();
Explanation:
gets(); collects a string of characters terminated by a new line from the standard input stream stdin
#include <stdio.h>
int main(void)
{
char string[80];
printf("Enter a string:");
gets(string);
printf("The string input was: %s\n", string);
return 0;
}
Output:
Enter a string: CuriousTab
The string input was: CuriousTab
Correct Answer: 65486, 65486
Explanation:
Step 1: int arr[] = {12, 14, 15, 23, 45}; The variable arr is declared as an integer array and initialized.
Step 2: printf("%u, %u\n", arr, &arr); Here,
The base address of the array is 65486.
=> arr, &arr is pointing to the base address of the array arr.
Hence the output of the program is 65486, 65486
Correct Answer: DRAVID
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