Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Transcribed Image Text:4. What is the output of the following program:
void fun (int n) {
}
cout << n;
if (n = 3)
return;
fun (n+1);
cout << n;
a. 12
b. 132
c. 12321
d. 1234
vector <int> v2 = {3};
v2 = v1;
e. 12345
5. Consider the following code segment, and select the best answer:
vector <int> vl =
(11, 23, 99};
for (int i = 0; i < 3; i++)
cout << v2.at (i) << " ";
The output will be:
a. 11 23 99
b. 3 23 99
int main()
{
}
a. This code gives a compilation error on the second line.
b. This code prints 6.
c. This code prints -6.
d. None of the above
fun (1);
return 0;
c. 3
d. There will be no output due to improper assignment operation in the
third line.
6. Consider the following code segment. Which one of the following statements is true?
string s1 = "893";
s1 += "99";
int y = s1.at (2) sl.at (4);
cout << y;
![15. In a C or C++ program, header files normally do NOT contain:
a. include directives
b. constants
C. struct definitions
d. function prototypes
e. function definition/implementation
16. Consider the following code segment that dynamically allocates memory on the heap to create and use it as a
matrix with 4 rows, and 3 columns:
int **a = new int* [4];
for (int i = 0; i <4; i++) {
}
Which one of the following statements is the proper way to de-allocate/remove the allocated memory from heap:
for (int i= 0; i < 3; i++)
delete [ a[i];
a
b
с
a[i] = new int [3];
for (int j=0; j < 3; j++)
a[i] [j] = 0;
delete [] a;
delete [] a;
for (int i = 0; i < 4; i++)
delete [] a [i];
for (int i = 0; i < 4; i++)
delete [] a[i];
delete [] a;
d delete [] a;
};
Consider the following definition of class Box and main function. Assuming constructor, copy constructor,
assignment operator, and destructor of this class are properly without any error implemented, answer the
following four questions:
class Box {
public:
Box();
~Box ();
Box (const Box & source);
Box& operator= (const Box & rhs);
private:
int* pointer;
int main (void) {
Box x;
Box y (x);
Box *z = new Box;
x = y;
return 0;
17. How many times the constructor of class Box is called?
Once
a.
b. Twice
c. Three times
d. None of the above
18. How many times the copy-constructor of class Box is called?
a. Once
b. Twice
c. Three times
d. None of the above
20. How many times destructor of class Box is called
}
a. Once
b. Twice
c. Three times
d. None of the above
19. How many times assignment operator of class Box is called
a. Once
b. Twice
c. Three times
d. None of the above
m reaches point 1, for the second](https://content.bartleby.com/qna-images/question/94884f69-365e-43dc-a457-f3f8066ccdfc/252eed10-416b-4cab-b7c5-c160681751ba/n2bvej5_processed.png)
Transcribed Image Text:15. In a C or C++ program, header files normally do NOT contain:
a. include directives
b. constants
C. struct definitions
d. function prototypes
e. function definition/implementation
16. Consider the following code segment that dynamically allocates memory on the heap to create and use it as a
matrix with 4 rows, and 3 columns:
int **a = new int* [4];
for (int i = 0; i <4; i++) {
}
Which one of the following statements is the proper way to de-allocate/remove the allocated memory from heap:
for (int i= 0; i < 3; i++)
delete [ a[i];
a
b
с
a[i] = new int [3];
for (int j=0; j < 3; j++)
a[i] [j] = 0;
delete [] a;
delete [] a;
for (int i = 0; i < 4; i++)
delete [] a [i];
for (int i = 0; i < 4; i++)
delete [] a[i];
delete [] a;
d delete [] a;
};
Consider the following definition of class Box and main function. Assuming constructor, copy constructor,
assignment operator, and destructor of this class are properly without any error implemented, answer the
following four questions:
class Box {
public:
Box();
~Box ();
Box (const Box & source);
Box& operator= (const Box & rhs);
private:
int* pointer;
int main (void) {
Box x;
Box y (x);
Box *z = new Box;
x = y;
return 0;
17. How many times the constructor of class Box is called?
Once
a.
b. Twice
c. Three times
d. None of the above
18. How many times the copy-constructor of class Box is called?
a. Once
b. Twice
c. Three times
d. None of the above
20. How many times destructor of class Box is called
}
a. Once
b. Twice
c. Three times
d. None of the above
19. How many times assignment operator of class Box is called
a. Once
b. Twice
c. Three times
d. None of the above
m reaches point 1, for the second
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- #include using namespace std; Type the program's output int main() { int g; g = 3; while (g <= 5) { } cout << g << endl; g = g + 1; return 0;arrow_forwardInstructions: Kindly provide comments that explains the program code below. (NOTE: this is a C program language) #include <stdio.h> int fact_recur(int n){if(n==0) return(1);return(n*fact_recur(n-1));} int fact_for(int n){ int fact=1; for(int i=1;i<=n;i++){ fact=fact*i; return fact; } }int main(void) { int number; printf("input number is: "); scanf("%d",&number); printf("factorial using for loop: %d",fact_recur(number)); printf("\nfactorial using recursion: %d",fact_recur(number)); return 0;}arrow_forwardQ1: 1. What is the output of this C code? void main(){ int a = 0, i = 0, b; for (i=0;i< 5; i++){ a++;continue; } cout<<"i="<arrow_forward4. What is the output of the following program: void fun (int n) { } cout << n; if (n = 3) return; fun (n+1); cout << n; a. 12 b. 132 c. 12321 d. 1234 e. 12345 int main () Bo{ } fun (1); return 0;arrow_forwardê #include using namespace std; int main() { int count = 5; int num = 2; while (count r && num ){ cout << count << " " << num << endl; count -=1; if (count % 2 == 0) num -=1; } return 0; Output: 52 4 1 3 1 20 10arrow_forward#include using namespace std; Type the program's output int main() { int g; g = 0; while (g >= −2) { } cout << g << endl; g = g - 1; return 0;arrow_forwardarrow_back_iosarrow_forward_ios
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