Introduction to computer programming, variables, comments, basic I/O operations, flow control (if) CPPE1 M1 Test

Introduction to computer programming, variables, comments, basic I/O operations, flow control (if) CPPE1 M1 Test

Introduction to computer programming, variables, comments, basic I/O operations, flow control (if) CPPE1 M1 Test

  1. Which of the following string dose not represent a valid variable name?

    • Auto
    • auto
    • AUTO
    • aUTO

  2. What is the output of the following snippet if a string 2.5 followed by Enter is enter through the keyboard?

    #include <iostream>

using namespace std;

void f(struct S S) {
   S.S[0] = S.S[1] + S.S[2] - 4;
}

int main()
{
    float x;
    
    cin >> x;
    cout << scientific << "x";
}
    • 0.25E1
    • x
    • 2.5
    • 2.5E0

  3. What is the value of the following literal?

    0E1

    • The literal is invalid
    • 0
    • 0.1
    • 0.01

  4. What is the value of the following literal?

    018

    • 16
    • 10
    • The literal is invalid
    • 2

  5. What is the output of the following snippet if a digit 8 followed by Enter is enter through the keyboard?

    #include <iostream>

using namespace std;

int main()
{
    int i;
    
    cin >> i;
    cout << i << hex << i + i << oct << i;
}
    • 81010
    • 810010
    • 8168
    • 8x10010

  6. What is the  final value of the k variable?

    int i = 3, j = 2, k = -1;

if(i > 0) {
   if(j <= 0) {
      if(k < 0)    
         k++;
      if(k <= 0) 
         k--;
    }
    if(j > 0)
      i++;
}

if(i <= 0)
    j++;

k = i + j + k;
    • 6
    • 4
    • 5
    • 3

  7. What is the value of the x variable?

    float x = 1. / 2. + 2. / 4.;
    • 0.75
    • 0.5
    • 0.25
    • 1.0

  8. What​ is the value of the following literal?

    -le-1

    • -0.1
    • -10.0
    • The literal is invalid.
    • -1.0

  9. Which of the following string represents a legal variable name?

    • 1st_literal_is_invalid
    • first literal is invalid
    • first_literal_is_invalid
    • #1_literal_is_invalid

  10. Which of the following string is a correct integer number(in the C++ language sense)?

    • 3'14
    • 3E14
    • 3.14
    • 3,14 

  11. Which of the following string is a proper floating-point number(in the C++ language sense)?

    • E14
    • 3.14
    • 3,14
    • 3_14

  12. What is the value of the following literal?

    x10

    • The literal is invalid
    • 2
    • 16
    • 10

  13. What is the value of the k variable?

    int k = 1 % 2 + 4 % 2;

    • 2
    • 3
    • 0
    • 1

  14. What is the final value of the k variable?

    int i = 3,  j, k;

if(i > 0) j = 2 + i * i;
if(i <= 0) j = 2 * i - 1;
if(j >= 0) k = j % i + 2;
if(j < 0) k = i % j + 2;
if(k < 0) k= k % i % j;
if(k >= 0)k = j % i % k;
    • 1
    • 0
    • 3
    • 2

  15. What is the value of the k variable?

    int i = 1;
int j = ++i;
int k = j++;
    • 2
    • 3
    • 1
    • 0

  16. What is the output of the following snippet?

    #include <iostream>

using namespace std;

int main()
{
   int i = 3, j = ++i, k = ++i;
   cout << k << j << i;
}
    • 345
    • 545
    • 543
    • 454

  17. What is the value of the following literal?

    010

    • 2
    • The literal is invalid
    • 8
    • 10

  18. What is the value of the following literal?

    0x1A

    • 16
    • 6
    • 26
    • The literal is invalid

  19. What is the value of the i variable?

    float x = 1.0 / 4.0
int i = x;
    • 0.33
    • 1
    • 0
    • 0.25

  20. What is the output of the following snippet if a digit 5 followed by Enter is entered throung the keyboard?

    #include <iostream>

using namespace std;

int main()
{
   int i = 3, j = ++i, k = ++i;

   cin >> i;
   cout << k + i << j - i << i * i;
}
    • 10545
    • 10-545
    • 10125
    • 10-125