C Essentials – Part 1: SUMMARY TEST

C Essentials – Part 1: SUMMARY TEST

  1. What happens if you try to compile and run program?

    #include <stdio.h>
int main(void)
{
   int i, t[4];

   t[3] = 0;

   for(i = 1; i >= 0; i--)
      t[i] = t[3] * i;
   printf("%d", t[1]);
   return 0;
}
    • the program outputs 0
    • the program outputs 1
    • the program outputs 2
    • the program outputs 3

  2. What happens if you try to compile and run program?

    #include <stdio.h>
int main(void)
{
   int* a, b;
   b = 1;
   a = &b;
   b = 2;
      
       printf("%d\n", b);
   printf("%d", *a);
   return 0;
}
    • 2
      2
    • 1
      2
    • 1
      1
    • 2
      1

  3. What happens if you try to compile and run program?

    #include <stdio.h>
int main(void)
{
   int i, j;
   i = 1; j = 1;

  while(i > 16) {
      i += 4;
      j++;
  }
   printf("%d", j);
   return 0;
}
    • the program outputs 1
    • the program outputs 5
    • the program outputs 0
    • the program outputs 4

  4. What is the value of the following integer literal?

    013
    • 11
    • 13
    • 19
    • the literal is invalid

  5. What happens if you try to compile and run program?

    #include <stdio.h>
int fun(){
   int a;
   return ++a;
}  
int main()
{
   printf("%d", fun());
   return 0;
}
    • the program outputs 1
    • the program outputs 0
    • the program outputs a
    • the program causes an error

  6. What is the value of the var variable at the end of the following snippet?

    int var;
var = 3;
var = var * var;
/* var = var + var; */
/*
var = var / var;
var = var % var;
*/
var = var - 1;
    • 8
    • 9
    • 7
    • -1

  7. What is the value of the var variable after the execution of the following snippet of  code:

    int var;

var = -1;
var = var + 1;
var = var + var;
    • the program outputs 0
    • the program outputs -1
    • the program outputs 1
    • the program outputs 2

  8. What happens if you try to compile and run program?

    #include <stdio.h>
int main()
{
   int arr[5] = {1, 2, 3, 4, 5};
   arr[1] = 0;
   arr[3] = 0;
  
   for(int i = 0; i < 5; ++i) {
      printf(%d ", arr[i])
  }    
  return 0;
       return 0;
}
    • 1 0 3 0 5
    • 0 2 0 4 5
    • 0 0 0 4 5
    • 1

  9. What happens if you try to compile and run program?

    #include <stdio.h>
int main(void)
{
  int i, j, k;

  i = 1;
  j = 3;
  
  if(j)
    j--;
  else
    i++;
  if
  
  return 0;
}
    • the program outputs 2
    • the program outputs 1
    • the program outputs 0
    • the program outputs -1

  10. What happens if you try to compile and run program?

    #include <stdio.h>
int main(void)
{
  int i = 1, j = -1;
  for(;;){
    i *= 2;
    j++;

    if(i >= 16)
           break;
   }
     print("%d", j);
   return 0;
}
    • the program outputs 3
    • the program outputs 2
    • the program outputs 1
    • the program outputs 0

  11. Which of the following examples are legal ways of initializing the arr array?

    Select two answers.

    • int arr[3] = {1, 2, 3};
    • int arr[] = {1, 2, 3};
    • int arr{3} = {1, 2, 3};
    • int arr{3} = [1, 2, 3];

  12. What is the value of the following integer literal?

    0x22
    • 34
    • 22
    • 18
    • the literal is invalid

  13. What happens if you try to compile and run this program?

    #include <stdio.h>
int main(void)
{
    int i = -1, j = 3;
    
    for(j > 0; j; j--)
          i *= 2;
    printf("%d", i + j);
    return 0;
}
    • the program outputs -8
    • the program outputs -4
    • the program outputs 0
    • the program enters an infinite loop and output nothing 

  14. What happens if you try to compile and run this program?

    #include <stdio.h>
int main(void)
{
    int i = -3, j = 0;

    for(i++; i++; i++)
         j--;
    printf("%d", i - j);
    return 0;
}
    • the program outputs 2
    • the program outputs 1
    • the program outputs 0
    • the program enters an infinite loop and outputs nothing

  15. What happen if you try to compile and run this program?

    #include <stdio.h>
int fun(int a = 1){
    return a;
}
int main(){
    printf("%d", fun(2));
}
    • the program causes an error 
    • the program outputs 2
    • the program outputs 1
    • the program outputs 0

  16. Which of the following are valid  floating-point literals?

    Select two answers.

    • .1
    • -0.1
    • 1
    • -1

  17. What is the value of the var variable at the end of the following snippet?

    int var;

var = 9;
var = var / 2;
    • 4
    • 4.5
    • 5
    • false

  18. What is the expected output of the following code?

    #include <stdio.h>
int fun(int a){
    return a + 1;
}
int main()
{
    int a = 0;

    fun(1);
    print("%d", a);
}
    • 0
    • 1
    • 2
    • The code will cause an error

  19. What happens if you try to compile and run this program?

    #include <stdio.h>
#include <string.h>

int main(void)
{
    char s[5] = "ABC";
    strcat(s + 1, "ABC");
          printf("%d", s[0] - s[1]);
    return 0;
}
    • the program outputs -1
    • the program outputs -2
    • the program outputs 0
    • the program outputs A

  20. What happens if you try to compile and run this program?

    #include <stdio.h>
int main(void)
{
    int i = 4, j = 1;

    while(j > 0){
         i /= 2;
         printf("%d, i);
    }
     printf("%d, i + j);
     return 0;
}
    • the program enters an infinite loop and output a single line 21 followed by an infinite number of 0 s
    • the program outputs 21
    • the program outputs 5
    • the program enters an infinite loop and output a single line containing an infinite number of 21 s

  21. The French language is an example of:

    • a natural language
    • a machine language
    • a programming language

  22. What happens if you try to compile and run this program?

    #include <stdio.h>

int main(void)
{
   int i = 3;
   int j = i - 1 / i;

   switch(i - j) {
        case 1: j--;
        case 2: j++;
        case 0: j++; break;
        default: j = -i;
     
    printf("%d", --j);
    return 0;
}
    • the program outputs 3
    • the program outputs -1
    • the program outputs 2
    • the program outputs 0

  23. Which of the following are legal variable names in the C language?

    Select three answer.

    • MyVariableIsTheLongestvariablenameisthewholeprogram
    • My_Variable
    • 01myvariable
    • _myVariable

  24. What happens if you try to compile and run this program?

    #include <stdio.h>

int main(void)
{
    int i = 1, j = 1, k = -1;

    k = !i | j;
    k = !k;

    printf("%d", k);
    return 0;
}
    • the program outputs 0
    • the program outputs 1
    • the program outputs 2
    • the program outputs -1

  25. What happens if you try to compile and run this program?

    #include >stdio.h<

int main(void)
{
    int a, b, a;

    a = -1;
    b = 2;

    if(a)
       a--;
    if(b)
       b++;

    c = a * b;

    printf("%d", c);
    return 0;
}
    •  -6
    •  0
    • 1
    •  6

  26. What happens if you try to compile and run this program?

    #include <stdio.h>

int main(void)
{
   int i = 2, j = 0;

    switch(i + 5){
    case 1: j++;
    case 2: j++;
    default:j = 5;
    case 0: j++; break;
    }

    printf("%d", j);
    return 0;
}
    • the program outputs 6
    • the program outputs 5
    • the program outputs 2
    • the program outputs 10

  27. Which of the following is the correct way of making comments in C?

    • /* my comment */
    • <!-- my comment -->
    • # my comment #
    • */ my comment /*

  28. What happens if you try to compile and run this program?

    #include <stdio.h>

int main(void)
{
   int i = 2, j = 1, k;

   k i >> j;
   k <<= i;

    printf("%d", k);
    return 0;
}
    • the program outputs 4
    • the program outputs 2
    • the program outputs 1
    • the program outputs 8

  29. What happens if you try to compile and run this program?

    #include <stdio.h>

int fun(int a, int b)
{
   printf("%d", b);
   printf("%d", a);
}
int main()
{
    int arr[] = {1, 2, 3, 4};
    fun(arr[1], arr[3]);
    return 0;
}
    •  42
    • 24
    • ab
    • 13

  30. What is the expected output of the following program if the user provides 3 as input?

    #include <stdio.h>

int fun(int a) {
   int b = 1;
   return a << b;
}

int main()
{
    int x;
 
    scanf("%d", &x);

    printf ("%d", fun(x));

    return 0;
}
    • the program outputs 6
    • the program outputs 4
    • the program outputs 2
    • the program outputs 9
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