Update Final Exam.txt

Author: TSG405

Course-Work/Week 6/Final Exam.txt

@@ -4,4 +4,384 @@
 
 
 
+ ------------------------------------------------------------------------
+ /*/*/*/*/* F.I.N.A.L E.X.A.M */*/*/*/*/
+ ------------------------------------------------------------------------ 
+ ------------------------------------------------------------------------ 
+ 
+ 
+ 
 --------------------------------------------------------------------------------------------------------------------------------------------------------
+1. Who invented the C language?
+
+Ans. Dennis Ritchie invented C at Bell Labs 
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+2. When you compile a correct C program you get a machine executable file such as a.out produced by the gnu compiler gcc.
+
+Ans. True
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+3. Which is true:
+
+ 1 - #define is a preprocessor command often used to introduce named constants
+ 2 - double and goto are keywords declaring types.
+ 3 - return (0); is normally the last statement in main()
+ 4 - The file stdio.h is where the compiler finds scanf().
+ 
+Ans. 1, 3, 4 
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+4. The statement -- printf(“HELLO\t\tWORLD\n”);
+
+Ans. Prints HELLO WORLD followed by a new line
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+5. The expression PI * radius * radius would be used to compute
+
+Ans. A circle's area
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+6. In a format string for printf which would you use to print an int?
+
+Ans. %d
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+7. The code 
+
+>>
+i = -10;
+while ( i < 0)
+{ … do something ; i--; }
+**--Displays a common error--**
+
+
+Ans. Its an infinite loop
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+8. The following program is suppose to write Hello World onto the screen but it has syntax errors - find
+and correct. 
+
+>>
+#include <stdio.h>
+int main(void)
+{
+ printf(“ Hello World\n”);
+ return 0,
+}
+
+
+Ans. It should be return 0;
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+9. Assume the given declarations and fill in the value of the expression .
+int a = 3, b = 4, c = 0, d = '1';
+
+Expression: a % b
+
+Ans. Enter answer here -- 3
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+10. Assume the given declarations and fill in the value of the expression .
+int a = 3, b = 4, c = 0, d = '1';
+
+Expression: b % a
+
+Ans. Enter answer here -- 1
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+11. Assume the given declarations and fill in the value of the expression .
+int a = 3, b = 4, c = 0, d = '1';
+
+Expression: a < b
+
+Ans. Enter answer here -- 1
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+12. Assume the given declarations and fill in the value of the expression .
+int a = 3, b = 4, c = 0, d = '1';
+
+Expression: c < b && a > 3
+
+Ans. Enter answer here -- 0
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+13. Assume the given declarations and fill in the value of the expression .
+int a = 3, b = 4, c = 0, d = '1';
+
+Expression: a / b > c
+
+Ans. Enter answer here -- 0
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+14. Assume the given declarations and fill in the value of the expression .
+int a = 3, b = 4, c = 0, d = '1';
+
+Expression: c = a++
+
+Ans. Enter answer here -- 3
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+15. Assume the given declarations and fill in the value of the expression .
+int a = 1, b = 2, c = 3;
+
+Expression: a - b * c
+
+Ans. Enter answer here -- (-5)
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+16. Assume the given declarations and fill in the value of the expression .
+int a = 1, b = 2, c = 3;
+
+Expression: c / a * b
+
+Ans. Enter answer here -- 6
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+17. Assume the given declarations and fill in the value of the expression .
+int a = 1, b = 2, c = 3;
+
+Expression: a++ + --b
+
+Ans. Enter answer here -- 2
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+18. Assume the given declarations and fill in the value of the expression .
+int a = 1, b = 2, c = 3;
+
+Expression: b = a = c
+
+Ans. Enter answer here -- 3
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+19. Assume the given declarations and fill in the value of the expression .
+int i = 0, j = 1, k = 2;
+
+Expression: i && j
+
+Ans. Enter answer here -- 0
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+20. Assume the given declarations and fill in the value of the expression .
+int i = 0, j = 1, k = 2;
+
+Expression: !!i
+
+Ans. Enter answer here -- 0
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+21. Assume the given declarations and fill in the value of the expression .
+int i = 0, j = 1, k = 2;
+
+Expression: i || !k
+
+Ans. Enter answer here 0
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+22. Assume the given declarations and fill in the value of the expression.
+int i = 0, j = 1, k = 2;
+
+Expression: (i && (j = k)) || (k > j)
+
+Ans. Enter answer here -- 1
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+23. If a function’s declaration is int foo(void):
+
+Ans. The function has no arguments 
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+24. In ANSI standard C(1989) code - this is what we are teaching- declarations can occur in a for statement as in :
+
+>>
+for(int i; i < 10; i++0 …
+
+
+Ans. False 
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+25. What happens when the return statement has a double expression and the function return type is int?
+
+Ans. There is a conversion from double to int
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+26. With the code :
+
+>>
+int foobar(int* n){
+ *n = *n +1;
+ return *n;
+}
+ 
+ when called:
+
+>>
+int k = 6;
+printf("foobar(k) = %d,",foobar(&k) );
+printf(" k = %d\n", k);
+what gets printed?
+
+
+Ans. foobar(k) = 7, k = 7 
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+27. A variable declared in a inner block that has the same name as one in the surrounding block causes an error.
+
+Ans. False
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+28. The original intent of using register int i;
+
+Ans. It was intended to compile optimized code
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+29. When declaring fact() why not use double fact() so that you do not have integer overflow?
+
+Ans. There would be problems with accuracy
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+30. Factorial can only be computed recursively.
+
+Ans. False
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+31. The function mystery is defined as
+
+
+>>
+int mystery(int p, int q)
+{ 
+ int r;
+ if ((r = p % q) == 0)
+ return q; 
+ else return mystery(q, r);
+}
+
+When called with mystery(2, 6) it will return:
+
+
+Ans. 2
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+32. The function mystery is defined as 
+
+>>
+int mystery(int p, int q)
+{
+ int r;
+ if ((r = p % q) == 0)
+ return q; 
+ else return mystery(q, r);
+}
+
+When called with mystery(7, 91) it will return:
+
+
+Ans. 7
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+33. A while can always be used to replace a for.
+
+Ans. True
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+34. An if-else statement can always replace an if statement. 
+
+Ans. True
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+35. If you declare the array char mystr[10];
+
+Ans. None of these
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+36. In the following code fragment what gets printed?
+
+>>
+int data[5] = {0 ,1, 2, 3, 4}, sum = 0 , i;
+
+for (i = 0; i < 5 ; i++)
+ sum = sum + data[i];
+printf(“%d\n”, sum);
+
+
+Ans. 10
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+37. In the following code fragment
+
+>>
+int a[10] = {1,2,3,4,5,6,7,8,9,10}, i = 6 ;
+int *p = &a[0];
+printf(“%d\n”, *(p + i));
+
+what gets printed?
+
+
+Ans. 7
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+38. The declaration char* str = & a[0]; where char a[5] = “abcd”;
+The value of *str is the char ‘a’;
+
+Ans. True
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+39. The input function scanf() uses “call by reference” to pass in argument values.
+
+Ans. True
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+40. Mergesort is less efficient than bubblesort for very large sorting problems.
+
+Ans. False
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+41. if p and q are pointers to double and x and y are double which of the following is legal:
+
+Ans. y = *q;
+--------------------------------------------------------------------------------------------------------------------------------------------------------
+
+
+
+~ TSG405, 2021