Programming Essentials in C: Chapter 2 Assignment (CLA) Exam Answers

1. Which of the following strings is a proper integer number (in the “C” language sense)?

• 123456
• 123_456
• 123.456
• 123,456

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

08

• the literal is invalid
• 10
• 1000
• 8

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

0x8

• the literal is invalid
• 10
• 1000
• 8

4. Which of the following strings is a valid variable name?

• Monte_Carlo
• Monte Carlo
• Monte@Carlo
• Monte-Carlo

5. Which of the following strings is an invalid variable name?

• _0_
• _0
• 0_
• ___

6. Is the following declaration valid?

int var, var;

• Yes
• No

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

    int var;
    var = 2;
    var = var * var;
    var = var + var;
    var = var / var;
    var = var % var;

• 16
• 8
• 1
• 0

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

    int var;
    var = 2;
    var = var * var;
    var = var + var;
     /*
    var = var / var;
    var = var % var;
      */

• 16
• 1
• 8
• 0

9. Which of the following strings is a proper floating-point number (in the ”C” language sense)?

• 123_456
• 123456
• 123,456
• 123.456

10. What is the value of the following floating-point literal?

8765E-2

• 876.5
• 8.765
• 0.8765
• 87.65

11. What is the value of the x variable at the end of the following snippet?

int x;
x = 1 / 2;

• 0.5
• 1
• 0
• 2

12. What is the value of the x variable at the end of the following snippet?

int x;
x = 1 / 2 * 3;
/***

• 0
• 1.5
• 1
• 2

13. What is the value of the x variable at the end of the following snippet?

float x;
x = 1. / 2 * 3;
/***

• 2
• 1.5
• 1
• 0

14. What is the value of the k variable at the end of the following snippet?

    int i,j,k;

    i = 4; 
    j = 5;
    --i;
    k = i * j;

• 12
• 18
• 16
• 15

15. What is the value of the k variable at the end of the following snippet?

    int i,j,k; 

    i = 4; 
    j = 5;
    ++j; 
    k = i * j;

• 21
• 24
• 28
• 18

16. What is the value of the k variable at the end of the following snippet?

int i,j,k;

 i = 3; 
 j = -3; 
 k = i * j; 
 k += j; 
 k /= i;

• -4
• 8
• 8
• 4

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

char c;

c = '\';

• ‘
• \0
• the assignment is invalid and causes a compilation error
• \

18. What is the value of the c variable at the end of the following snippet?

    char c;

    c = 'a';
    c -= ' ';

• a
• A
• \0
• the assignment is invalid and causes a compilation error

19. What is the value of the k variable at the end of the following snippet?

    int i,j,k; 
    
    i = 3; 
    j = -3; 
    k = (i >= i) + (j <= j) + (i == j) + (i > j);

• 2
• 3
• 0
• 1

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

    #include  
    int main(void) { 
        int i,j,k; 
        i = 2; 
        j = -2; 
        if(i) 
            i--; 
        if(j) 
            j++; 
        k = i * j; 
        printf("%d",k); 
        return 0; 
    }

• -1
• 2
• 1
• -2