1) Look at the code snippet below:const float * ch = &c ;Which of the following statement is true for the variable ‘ch’ ?
a) const-Pointer to non-const-Pointee
b) non-const-Pointer to const-Pointee
c) const-Pointer to const-Pointee
d) non-const-Pointer to non-const-Pointee
Answer(s) : b) non-const-Pointer to const-Pointee
[quads id=1]
2) Look at the following code segment and decide which statement(s) is/are correct.int main(){ char m = 4; const char n = 5; const char * p = &n; char * const q = &m; // … n = 6; // stmt-1 *p = 7; // stmt-2 p = &m; // stmt-3 *q = 8; // stmt-4 … }
a) stmt-1
b) stmt-2
c) stmt-3
d) stmt-4
Answer(s) : a) stmt-1 b) stmt-2
3) Identify the output of the following code snippet. int main() { typedef union Complex { double re; double im; } Complex; const Complex c = {46} ; c.im= 59; cout << c.re; return 0;}
a) 46
b) Compilation Error: Cannot assign an integer value to a double variable
c) Compilation Error: ‘ im‘ is a read only object
d) 59
Answer(s) : c) Compilation Error: ' im' is a read only object
[quads id=1]
4) Identify the correct statement(s) about the following code.#include
#include
using namespace std;
#define TWO 2
#define PI 4.0*atan(1.0)
int main() {
int r = 10;
double peri = TWO * PI * r;
cout << “Perimeter = ”
<< peri << endl;
return 0;
}
a)
Types of TWO is determinate
b)
TWO is a manifest constant
c)
Type of PI may be indeterminate
d)
PI look like variable
Answer(s) : b) TWO is a manifest constant c) Type of PI may be indeterminate d) PI look like variable
5) What will be the output of the following code ?
#include
using namespace std;
double increment(const double &prm) {
return (prm + 1);
}
int main() {
double x = 10, y;
y = increment(x);
cout << x+2 << ” “<< y;
return 0;
}
a)
13 11
b)
10 11
c)
12 11
d)
11 11
Answer(s) : c) 12 11
[quads id=1]
6) What will be the valid output/ Error of the following code snippet ?
void func(int n1 = 14, int n2) {
cout < }
int main() {
func(1);
func(2.5, 4);
return 0;
}
a)
1 14 2.5 4
b)
14 1 2.5 4
c)
14 1 2 4
d)
Compilation error: Default value missing for parameter 2 of func
Answer(s) : d) Compilation error: Default value missing for parameter 2 of func
7) What will be the output of the following code snippet?
int Add(int a, int b = 19) { return (a + b); }
double Add(double c) {
return (c + 1);
}
int main() {
int x = 5, y = 4, z;
z = Add(x, y);
cout << z;
double s = 9.5, u;
u = Add(s);
cout << ” ” << u << endl;
return 0;
}
a)
9 28
b)
'Add' cannot be resolved (ambiguous)
c)
9 28.5
d)
9 10.5
Answer(s) : d) 9 10.5
[quads id=1]
8) Which function prototype will match the function call: func(45.2,65) ?
void func(int, int); // Proto 1
void func(int, double, int = 6); // Proto 2
void func(double, double, char = ‘c’); // Proto 3
void func(double, char = ‘d’, char = ‘c’); // Proto 4
a)
Proto 1
b)
Proto 2
c)
Proto 3
d)
Proto 4
Answer(s) : a) Proto 1 b) Proto 2 c) Proto 3
9) What will be the output/Error of the following code snippet ?
int& Ref_func( int param) {
return (++param);
}
int main() {
int x = 10, y = 15, z = 14;
y = Ref_func(x);
cout << x << ” “<< y ;
Ref_func(x) = z;
cout << x << ” “<< y;
return 0;
}
a)
10 11 10 11
b)
11 15 11 15
c)
Compilation Error: invalid function call
d)
Compilation Error: invalid assignment of pointer to non-pointer
Answer(s) : a) 10 11 10 11
[quads id=1]
10) Fill up the blanks to get the output: “I love Travelling”
#include
#include
#include
using namespace std;
typedef struct _String { char *str; } String;
____________________________________ {
String s;
s.str = (char *) malloc(strlen(s1.str) +
strlen(s2.str) + 1);
strcpy(s.str, s1.str);
strcat(s.str, s2.str);
return s;
}
int main() {
String s1, s2, s3;
s1.str = strdup(“I”);
s2.str = strdup(” love Travelling “);
s3 = s1 + s2;
cout << s3.str << endl;
return 0;
}
a) String operator+(const String& s1, const String& s2)
b) String + operator(const String& s1, const String& s2)
c) String +(const String& s1, const String& s2)
d) string operator+(const String s1, const String& s2)
Answer(s) : a) String operator+(const String s1, const String s2)
11) What will be the output/Error of the following code snippet ?
inline int SQR(int x) { return x * x; }
int main() {
int a , b, c;
a = 10, b = 14;
b = SQR(a);
cout << b << endl;
c = SQR(++a);
cout << c << endl;
return 0;
}
a)
100 121
b)
Compilation Error: invalid function definition
c)
100 132
d)
Compilation Error: invalid function parameter
Answer(s) : a) 100 121
[quads id=1]
12) What will be the output/Error of the following code snippet ?
int main(){
int d;
int *p = (int *)operator new(sizeof(int));
d = 5;
*p = d;
cout << ++*p + d++;
return 0;
}
a) 10
b) 11
c) 12
d)
Compilation Error: pointer not deleted after allocation with new
Answer(s) : b) 11
