Question

QUESTION 1

1. What is the output of the following code snippet?

   int main()

   {

      bool attendance = false;

      string str = "Unknown";

      attendance = !(attendance);

      if (!attendance)

      {

         str = "False";

      }

      if (attendance)

      {

         attendance = false;

      }

      if (attendance)

      {

         str = "True";

      }

      else

      {

         str = "Maybe";

      }

      cout << str << endl;

      return 0;

   }

   		False
   		True
   		Unknown
   		Maybe

QUESTION 2

1. What is the output of the following code snippet?

   #include <iostream>

   #include <string>

   using namespace std;

   int main()

   {

      string str1 = "her";

      string str2 = "cart";

      if (str1 < str2)

      {

         cout << str2;

      }

      else

      {

         cout << str1;

      }

      return 0;

   }

   		her
   		hercart
   		cart
   		There is no output due to compilation errors.

QUESTION 3

1. Consider the following code snippet:

   bool attendance = true;

   bool failed = false;

   Which of the following if statements includes a condition that evaluates to true?

   		if (attendance == "true") { ... }
   		if (attendance) { ... }
   		if (failed) { ... }
   		if (attendance == failed) { ... }

QUESTION 4

1. What is the value of the cost variable after the following code snippet is executed?

   int cost = 82;

   if (cost < 100) 

   { 

      cost = cost + 10; 

   }

   if (cost > 50) 

   { 

      cost = cost * 2; 

   }

   if (cost < 100) 

   { 

      cost = cost - 20; 

   }

   		82
   		92
   		184
   		164

QUESTION 5

1. Assuming that the user provides 303 as input, what is the output of the following code snippet?

   int x;

   int y;

   x = 0;

   cout << "Please enter y: ";

   cin >> y;

   if (y > 300)

   { 

      x = y;

   }

   else 

   { 

      x = 0;

   }

   cout << "x: " << x << endl;

   		x: 0
   		x: 300
   		x: 303
   		There is no output due to compilation errors.

QUESTION 6

1. Which of the following options checks that country is neither China nor Denmark?

   		if (country != "China" || country != "Denmark")
   		if !(country == "China" || country == "Denmark")
   		if !(country == "China" && country == "Denmark")
   		if (country != "China" || country == "Denmark")

QUESTION 7

1. Which of the following variables is used to store a condition that can be either true or false?

   		Algebraic
   		Logical
   		Boolean
   		Conditional

QUESTION 8

1. Which of the following operators is NOT a relational operator?

   		<=
   		+=
   		!=
   		==

QUESTION 9

1. Assuming that the user provides 99 as input, what is the output of the following code snippet?

   int a; 

   int b;

   a = 0;

   cout << "Please enter b: ";

   cin >> b;

   if (b > 100);

   {   a = b;}

   cout << "a: " << a << endl;

   		a: 0
   		a: 99
   		a: 100
   		There is no output due to compilation errors.

Answer 1

QUESTION 1
Answer: Option d) Maybe
Explanation:
Program:

#include <iostream>
using namespace std;
int main()
{
bool attendance = false;
string str = "Unknown";
attendance = !(attendance);
if (!attendance)
{
str = "False";
}
if (attendance)
{
attendance = false;
}
if (attendance)
{
str = "True";
}
else
{
str = "Maybe";
}
cout << str << endl;
return 0;
}

Output:

QUESTION 2
Answer: Option a) her
Explanation:

Program:

#include <iostream>
#include <string>
using namespace std;
int main()
{
string str1 = "her";
string str2 = "cart";
if (str1 < str2)
{
cout << str2;
}
else
{
cout << str1;
}
return 0;
}

Output:

QUESTION 3
Answer: Option b) if (attendance) { ... }
Explanation:

Program:

#include <iostream>
#include <string>
using namespace std;
int main()
{
bool attendance = true;
bool failed = false;
if (attendance)
{
cout <<"true";
}
else
{
cout <<"false";
}
return 0;
}

Output:

QUESTION 4
Answer: 184
Explanation:

Program:

#include <iostream>
#include <string>
using namespace std;
int main()
{
int cost = 82;
if (cost < 100)
{
cost = cost + 10;
}
if (cost > 50)
{
cost = cost * 2;
}
if (cost < 100)
{
cost = cost - 20;
}
cout<<"cost : "<<cost;
}

Output:

QUESTION 5
Answer: 303
Explanation:

Program:

#include <iostream>
#include <string>
using namespace std;
int main()
{
int x;
int y;
x = 0;
cout << "Please enter y: ";
cin >> y;
if (y > 300)
{
x = y;
}
else
{
x = 0;
}
cout << "x: " << x << endl;
}

Output:

QUESTION 6
Answer: Option c) if !(country == "China" && country == "Denmark")

QUESTION 7

Answer: Option c) Boolean

QUESTION 8

Answer: Option b) +=

QUESTION 9
Answer: Option b) 99
Explanation:

Program:

#include <iostream>
#include <string>
using namespace std;
int main()
{
int a;
int b;
a = 0;
cout << "Please enter b: ";
cin >> b;
if (b > 100);
{ a = b;}
cout << "a: " << a << endl;
}

Output: