C++ HW help

Jul 8th, 2013
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Programming
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Question description

The following questions are true/false and multiple choice. PLEASE HELP!

 1. Every C++ program must have:

  A. cout statement  B. function main   

   C. #include statement  D. All of the above

 

 2. The following data :  72  'A'  "Hellow"  2.87

  are examples of

   A. variables  B. literals   

   C. strings  D. None of the above

 

 3. int  x;

  int  y = 4;

   long z = 7;

 

   Which statement forces the compiler to perform automatic

  promotion?

   A. z = z + y  B. x = y + (int)z; 

   C. x = (int)z;  D. None of the above 

 4. What is the error ?

  int schedule( char activity )

  {

   int i, activity;

   float time;

   

  // code 

   }

   A. This is a function call and not a function definition.

   B. No error.

   C. Variable activity cannot be re-declared. 

   D. Missing semicolon.

 5. What is printed by the following program segment ?

  int x;

  x = 4 * (2 + 5)/9 + 3;

   cout << "The result is " << x;

   A. The result is 3.  B. The result is 6. 

   C. The result is 5.  D. The result is 4.

 6. cout << 'A';

   What is the displayed result of the above statement?

  A. 'A'   B. A compiler error   C. 65   D. A  E. 1

 7. int x;

   int y;

   const int z = 0;

   Which statement will cause a compile error?

   

   A. x = y = z;  B. x = z = y;  C. x = y = 'A';  D. x = y = 10000;

 8. int x = 4;

   int y;

   y = x++ + 1;

  What is the value of variable y after the above statement executes?

   

   A. 4   B. 5  C. 6   D. 7  E. None of the above

 9. int x = 4;

   int y;

   y = --x + 1;

   What is the value of variable y after the above statement executes?

   

   A. 4   B. 5   C. 6   D. 7  E. None of the above

10. int x = 4;

   int y;

   y = ++(x + 1);

   

   What is the result of an attempt to compile and run the

   above statements?

   

   A. 4    B. 5    C. 6   D. 7   E. A compile error

11. int x = 11;

   double y;

   y = (double)x / 3;

   What is the value of variable y after the above statement executes?

 

   A. 3   B. 3.66667  C. 4  D. None of the above

12. int x = 11;

   int y;

   y = x % 3;

   What is the value of variable y after the above statement executes?

   

   A. 3  B.2.2  C. 2  D. 3.33  E. None of the above

13. int x;

  main() 

  {

  int y;

  }

  What is true regarding the scope of x and y ?

   

  A. x is local; y is global  B. x and y are both local

  C. x and y are both static  D. x is global; y is local

14. Assuming x starts with the value 10, what will the following

   code fragment print out ?

   cout << x-- << ' ';

   cout << ++x;

   

   A. 9 10  B. 10 10  C. 10 9  D. none of the above

15. Executing the "continue" statement from within a loop

  causes control to go

  A. to the next line of code

  B. out of the loop

  C. to the beginning of the loop

  D. to check the loop condition for repeating the loop

  E. none of the above

   

16. Overloaded functions

  A. are a group of functions with the same name and same

   number of arguments.

  B. are a group of functions with the same name and

   different parameter types. 

  C. make life easier for the programmer.

  D. none of the above.

17. The following statements, using manipulators fixedpoint and showpoint:

  double half = 20.0;

  cout << fixedpoint << showpoint << half << endl; 

  is syntactically correct.

  T__  F__

18. The following two implementations perform the same operation:

  q = x < y ? a+b : x*2;

  if( x < y )

  q = a + b;

  else

  q = x*2; 

  T__  F__

19. x != y is the same as (x >y || x<y) 

  T__  F__

20. y < x is the same as x >= y 

  T__  F__

21. The following statement wants to determine if count is outside the

   range of 0 through 100: 

  if (count < 0 && count > 100) 

   

  T__  F__

 

22. It is correct to write x%y if either x or y is float.

  T__  F__

23. One limitation of the for loop is that only one variable may be

  initialized in the initialization expression.

   

  T__  F__

24. How many times is a "do while" loop executed ?

  A. once  B. always skipped  C. forever 

   D. at least once  E. none of the above 

25. What is the value of w after this code fragment is executed ?

   int x(2), y(5), w;

   w = x * (x > y ? 1 : 2);

   

   A. 2  B. 4  C. 10   D. none of the above

26. In C++ you must declare all variables only at the beginning

   of the function.

   T__  F__

27. In C++ cin and cout are built into C++ language as keywords.

  T__  F__

28. The following lines of code

  int i = 10;

  cout << setw(6) << i << i << endl;

  display:  1010

  T__  F__

29. The following lines of code

  double d = 7.0;

  cout << d << endl;

  display: 7.0

  T__  F__

30. The following function prototypes

  int increment(char);

  int increment(int);

  are not accepted in C++ because they have the same name.

  T__  F__

31. Parameter names in a prototype are optional.

  T__  F__

 32. The following is a function prototype:

   CalcTotal();

  T__  F__ 

33. If a C++ program has two component functions, main() and

  mistery(), it is possible that mistery() calls main().

  T__  F__

34. The parameter must have the same name with the argument.

  T__  F__

35. Parameters are declared and initialized on the function header.

  T__  F__

36. The following declaration is accepted by the compiler:

  int return;

  T__  F__

37. The following declaration is not accepted by the compiler:

  int weight = 4,000;

  T__  F__

38. Changes to a function parameter always affect the original

  argument as well. 

   

  T___  F__

39. The following function prototypes are accepted by compiler:

  int GetValue();

  double GetValue();

  T___  F__

40. The following implementation is correct:

  double average (int value1, int value2, int value3) 

   {

   double average;

   average = value1 + value2 + value3  / 3; 

   }  

  T___  F__

41. This program will not compile:

  int main()

  {

   float This_One = 2;

   float That_One;

   That_one = 2 * This_one; 

  }

  T__  F__

42. This program will not compile:

  main()   

  {

   double constant_1 = 2;  /* Program constant

   double variable_1;  /* Program variable. 

   variable_1 = constant_1 + constant_1;

  }

  T__  F__

43. There is no logical error inside this code segment:

  if ( gender == 1 )

   cout << "Woman" << endl;

  else;   

   cout << "Man" << endl;

  T__  F__

44. There is no logical error inside this code segment:

  while ( z >= 0 ) 

   sum += z;

  T__  F__

45. There is an error inside this code segment:

  int x = 1, total; 

  while ( x <= 10 )

  {

   total += x;

   ++x;

  }

  T__  F__

46. The following program is syntactically correct

   #include iostream 

   using namespace std; 

  int main  ()

  {

   int a, b, c 

   a = 3; b = 4; c = a + b;

   cout << "The value of c is " << c;

   return 0;

   }

 

   T__  F__

47. The following program is syntactically incorrect:

   #include <iostream>

   using namespace std; 

   int main  ()

   {

   int a, b, c 

   a = 3;  b = 4;  c = a + b; 

   cout << "The value of c is " < c; 

   return 0;

   }

 

   T__  F__

48. The following program is syntactically correct:

   for ( int x = 1; x <= 20; ++x )

   {

   if ( x % 5 == 0 )

   cout << x << endl;

   else

   cout << x << '\t';

   }

   T__  F__

49. The following program is logically correct:

   switch ( n )

   {

   case 1:

   cout << "The number is 1" << endl; 

   case 2:

   cout << "The number is 2" << endl;

   break;

   default:

   cout << "The number is not 1 or 2" << endl;

   break;

   }

   T__  F__

50. The following code prints the values 1 to 10.

  n = 1;

   while ( n < 10 ) 

   cout << n++ << endl;

   T___  F__

51. The following code is correct:

   for ( x = 100, x >= 1, ++x ) 

   cout << x << endl; 

   T___  F__

52. The following program is syntactically correct:

   int sum( int x, int y )

   {

   int result;

   result = x + y; 

   }

   T___  F__

53. The following program is syntactically correct:

   void product()

  {

   int a;  int b;  int c;  int result;

   cout << "Enter three integers: ";

   cin >> a >> b >> c;

   result = a * b * c;

   cout << "Result is " << result;

   return result; 

  }

  T___  F__

54. The following program has no error:

  using namespace std;

   

  int main ()

  {

  double number1, number2, sum;

  cout << "Enter a number: ";

  cin >> number1;

  cout << "Enter another number: ";

  cin >> number2;

  sum = number1 + number2;

  cout << "The sum of the two numbers is " << sum;

  return 0;

  }

  T___  F__

55. The following program has no error: 

  #include <iostream>

  using namespace std;

  int main ()

  {

  double number1, number2, sum;

  cout << "Enter a number: ";

  cin << number1; 

  cout << "Enter another number: ";

  cin >> number2; 

  sum = number1 + number2;

  cout << "The sum of the two numbers is " << sum;

  return 0;

  }

  T___  F__

56. The following program is syntactically correct:

  #include <iostream>

  using namespace std;

  int main ()

  {

  double number1, number2, sum;

  cout << "Enter a number: ";

  cin >> number1;

  cout << "Enter another number: ";

  cin >> number2;

  number1 + number2 = sum; 

  cout << "The sum of the two numbers is " << sum;

  return 0;

  }

  T___  F__

57. The following program is syntactically correct:

  #include <iostream>

  using namespace std;

  int main ()

  {

  double number1, number2, sum;

  cout << "Enter a number: ";

  cin >> number1;

  cout << "Enter another number: ";

  cin >> number2;

   sum = number1 + number2;

  cout "The sum of the two numbers is " << sum; 

  } 

  T___  F__

 

58. The following program is syntactically correct:

  #include <iostream>

  using namespace std;

  void main ()

  {

  const number1, number2, product;  

  cout << "Enter two numbers and I will multiply\n";

  cout << "them for you.\n";

  cin >> number1 >> number2;

  product = number1 * number2;

  cout << product;

  }

  T___  F__

59. There is something compiler does not like in this code:

  #include <iostream>; 

  using namespace std;

  void main ()

  {

  int number1, number2, product;

  cout << "Enter two numbers and I will multiply\n";

  cout << "them for you.\n";

  cin >> number1 >> number2;

  product = number1 * number2;

  cout << product;

  }

  T__  F__

60. The following program is syntactically correct:

  #include <iostream>

  using namespace std;

  void main () 

  {

  int number1, number2, product;

  cout << "Enter two numbers and I will multiply\n";

  cout << "them for you.\n";

  cin >> number1 >> number2;

  product = number1 * number2;

  cout << product;

  return 0;

  }

  T__  F__

61. The following program is syntactically correct:

  #include <iostream>

  using namespace std;

  int main ()

  {

  int number1, product;  

   cout << "Enter two numbers and I will multiply\n";

  cout << "them for you.\n";

  cin >> number1 >> number2;

  product = number1 * number2;

  cout << product;

  return 0;

  }

  T__  F__

62. The following program is correct:

  #include <iostream>

  using namespace std;

  int main()

  {

  int numCount, total; 

  double average;

  cout << "How many numbers do you want to average ? ";

  cin >> numCount;

  for (int count = 0; count < numCount; count++)

  {

  int num;

  cout << "Enter a number: ";

  cin >> num;

  total += num;

  count++;  

  } 

  average = total / numCount; 

  cout << "The average is << average << endl;

  return 0;

  }

  T__  F__

63. The following program is logically correct:

  #include <iostream>

  using namespace std;

  int main()

  {

  int count=1, total=0;

 

  while (count <= 100) 

  total += count;

  cout << "The sum of the numbers 1-100 is ";

  cout << total << endl;

  return 0;

  }

   T__  F__

 64. What value does this program display?

   void inc( int x );

   void main()

   {

   int x = 1;

   inc( x );

   cout << x; 

   }

 

   void inc( int x ) 

   {

   x++; 

   }

  A. -1  B. 0  C. 1  D. 2 

 

65. Class-objects contain only data.

  T__  F__

66. The purpose of information hiding is to keep the data

  members public.

  T__  F__

67. Class members may be all private.

  T__  F__

68. private keyword must be always used to declare private members.

  T__  F__

69. A member function is called to act on a specific object.

  T__  F__

70. If three objects of a class are defined, how many copies

  of that class data are stored in memory ?

  And how many copies of its member functions ?

  A. 3  3  B. 1  1  C. 1  3  D. 3  1

71. Data or functions designated private are accessible

  A. to any function in the program.

   B. to private member-functions of that class only

  C. only if you know the password

  D. to all member-functions of that class

72. A constructor has a header syntactically implemented like for

  any other function in C++.

   T__  F__ 

 73. There is always at least one constructor part of the class.

 

   T__  F__ 

 74. Like any C++ function, a constructor may be overloaded.

   T__  F__ 

 75. A constructor can call other member functions of the class.

   T__  F__ 

 76. Attempting to initialize a non-static data member of a class

   explicitly in the class definition is a syntax error.

   T__  F__ 

 

 77. Class members specified as private are accessible only to

   member functions of the class and friends of the class. 

   T__  F__ 

 78. You cannot use the scope-resolution-operator :: in main().

   T__  F__ 

 79. Defining as const a member function that modifies a data member

   of an object is a compilation error.

   T__  F__ 

 80. The prototypes for friend functions must appear in the class

   definition.

   T__  F__ 

 81. You can declare as const all of a class's member functions.

   T__  F__ 

 82. You can declare an object as const.

   T__  F__ 

 83. The following class implementation is syntactically correct:

   class Time

   {

   public:

  // function prototypes

   private:

  int hour = 0; 

  int minute = 0;

  int second = 0;

   };

   T__  F__ 

 

 

 84. The following class definition is syntactically correct:

   class Circle: 

   {

   private 

  double centerX;

  double centerY;

  double radius;

   public 

  SetCenter(double,double); 

  SetRadius(double); 

   } 

 

   T__  F__ 

 85. Objects may be passed as function arguments.

   T__  F__


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