1..Which statement would store a user-entered number into a variable named numQu

Question

1..Which statement would store a user-entered number into a variable named numQuiz?

Select one:

a. cin >> numQuiz

b. cin << numQuiz;

c. cout << numQuiz

; d. cin >> numQuiz;

2..

What is the output of the following code?

int main() {

   int y = 4; int z = 7;

   cout << (z % y);

   return 0;

}

Select one:

a. 1

b. 3

c. 7

d. 28

4...

Which statement defines an integer variable?

Select one:

a. short numSeconds;

b. int numSeconds;

c. unsigned long long numSeconds;

d. All of the above.

5..

Which is the first statement to contain an overflow?

int main() {

   int x = 1000; int y = 10000; // A)

   x = x * x; // B)

   y = x * x * y; // C)

   return 0;

}

Select one:

a. int x = 1000; int y = 10000;

b. x = x * y;

c. y = x * x * y;

d. No statement contains an overflow.

6..

What is main in C++?

Select one:

a. Used to denote a list of statements.

b. The starting place of a program.

c. Represents a particular memory location.

d. Textual representation of a program.

9..

What is the output of the following code?

int main() {

   int x = 1; int y = 2;

   cout << static_cast<double>(x) / static_cast<double>(y);

   return 0;

}

Select one:

a. 0

b. 0.5

c. 1

d. No output. Error in code.

11.

What is the output of the following code?

int main() {

   double x = 2.0; double y = 3.0;

   cout << pow(x, y);

   return 0;

}

Select one:

a. 5

b. 6

c. 8

d. 9

Explanation / Answer

1.

a: cin >> numQuiz : cin syntax is wrong as it gives >> and it also doesn't have ; at the end os statemen

b. cin << numQuiz; : This format is correct to store number in numquiz variable

c. cout << numQuiz; : cout used to display the data

d. cin >> numQuiz; : >> wont work with cin

so option " a. cin >> numQuiz" is correct answer

2. int y = 4; int z = 7;

   cout << (z % y);

here z is 7 and y is 4

7%4=3

so option " b. 3 " is correct answer

4.

a. short numSeconds; : This is correct way to declare a variable

b. int numSeconds; : This is correct way to declare a variable

c. unsigned long long numSeconds; : This is correct way to declare a variable

all are correct so option d. all of the above is correcr answer

5.

a. int x = 1000; int y = 10000; : it doesn't rise any overflow

b. x = x * y; : it gives 10000000

c. y = x * x * y; : this will rise an error

so option " c. y = x * x * y; " is correct

6. answer is : "b. The starting place of a program. "

when main detects compiler will undesratnd this is the starting point of program

7.

int x = 1; int y = 2;

   cout << static_cast<double>(x) / static_cast<double>(y);

here x=1, y=2

it automatically type casting that variable as we specify static_cast<double>

so 1/2=0.5

so option " b. 0.5" is correct answer

11.double x = 2.0; double y = 3.0;

   cout << pow(x, y);

here x=2, y=3

pow(2,3)= 2^3=8

so option " c.8" is correct answer

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