Hello I have just a few questions that I need help answering: Question 211 pts R

Question

Hello I have just a few questions that I need help answering:

Question 211 pts

Review this declaration for a constructor:

Widget (int = 0, int = 0);

Which statement below correctly calls the constructor?

Given the Widget class below, which of the following statements is true?

class Widget{
     Widget() {}
   ~Widget() {}
};

Question 351 pts

Given this code segment:

int *intPtr = new int;

which statement below properly releases the memory?

Question 401 pts

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Question 411 pts

Which of the following enables you to create a new class based on an existing class?

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Question 421 pts

Which of the following correctly compares the two strings below to see if they contain the same value?

char name1[50] = "Sam Smith";
char name2[50] = "Stan Smith";

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Question 431 pts

The strlen() function returns the number of ____ in its C-string parameter.

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Question 441 pts

What is stored in the variable name after the code below executes and the user enters John Doe at the keyboard?

char name[50];
cin >> name;

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Question 451 pts

Given the following array:
char greeting[80];
which of the statements below provides a value for greeting?

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Question 461 pts

Which of the following declarations is incorrect?

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Question 471 pts

The method ____ returns the next character from the input stream without extracting the character from the stream.

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Question 481 pts

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Question 491 pts

What prints as a result of the code segment below (there is a space between the two words)?

cout << strlen("Hello World");

Widget a; 1 class Base Class private: int private variable; public: int publicvariable; protected: int protectedVariable ; 10 class DerivedClass : public BaseClass 11 public DerivedClass () { private variable = 1; publicVariable = 2; protectedVariable = 3; 17:

Explanation / Answer

Q1. Widget (int = 0, int = 0);

Ans. All of the above

Q2. class Widget{
     Widget() {}
   ~Widget() {}
};

Ans. ~Widget() will be executed automatically when an object of the Widget class goes out of scope.

Q3. int *intPtr = new int;

Ans. Delete intPtr

Q4. (Question 401 pts)

Ans. The code generates a compiler error at line 13.    (because private members cannot be inherited )

Q5. Which of the following enables you to create a new class based on an existing class?

Ans. Inheritance

Q6. Which of the following correctly compares the two strings below to see if they contain the same value?
char name1[50] = "Sam Smith";
char name2[50] = "Stan Smith";

Ans. if (strcmp(name1, name2)==0)

Q7. The strlen() function returns the number of ____ in its C-string parameter.

Ans. Characters

Q8. What is stored in the variable name after the code below executes and the user enters John Doe at the keyboard?

Ans. John

Q9. Given the following array:
char greeting[80];
which of the statements below provides a value for greeting?

Ans. strcpy (greeting, "hello");

Q10. Which of the following declarations is incorrect?

Ans. All of the above declarations are correct, but (char *greeting = "hello"; this may give a warning)

Q11. The method ____ returns the next character from the input stream without extracting the character from the stream.

Ans. cin.peek()

Q12. Which of the following statements is true with respect to the code fragment below?

Ans. The code will print "The strings are not equal".

Q13. What prints as a result of the code segment below (there is a space between the two words)?
cout << strlen("Hello World");

Ans. 11

Please feel free to comment if explanation is required anywhere. Thank you!

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