Databases
StackOverflow2013
Postsdbo
POC++ Quiz Questions
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POC++ Quiz Questions
    primarykey
    data
    text
    <p>I am practicing for an important quiz and I found 20 questions on c++ I am not very sure about. They came without answers and i wondered if you could help me answer them since I am still a rookie who is learning. I marked with an arrow the answer which i thought was correct for every wuestion with a brief reason.</p> <h3>QUESTION 1</h3> <pre><code>class Base{ protected: int a; public: void seta(int x){a = x;}; void printa(void){cout &lt;&lt; a;}; }; class SecondClass : public Base { public; int b; }; void main (void) { Secondclass tmp; tmp.seta(12); tmp.printa(); } a)SecondClass.a is public; b)SecondClass.a is protected; &lt;-- (Since SecondClass inherits from Base) c)SecondClass.a is private; d)SecondClass.a is not accessible; </code></pre> <h3>QUESTION 2</h3> <p>What happens when the function foo() below is executed? Assume bar() is an existing function.</p> <pre><code>void foo() { Object *o = new Object; bar(o); } a) o is destroyed at the end of the scope of foo b) o is not destroyed &lt;-- (since there is no delete and o is a pointer) c) o is destroyed if there is no exception in bar() d) None of the above </code></pre> <h3>QUESTION 3</h3> <p>Consider the following function declarations in a header file:</p> <pre><code>void doit(char *, int); int doit(char *); float doit(float, float); Which of the following declarations cannot follow in the same header (no idea): a) void doit(int, char*); b) float doit(char *); c) int doit(int, int); d) int doit(int); </code></pre> <h3>QUESTION 4</h3> <p>What is present in an abstract class that makes it abstract?</p> <pre><code>a) virtual keyword prefix o member function b) virtual keyword prefixed to member function and sufixed with =0 &lt;--(since without the =0 it wouldnt be a pure virtual method which must be overriden) c) member function in protected mode d) any of the above </code></pre> <h3>QUESTION 5</h3> <p>What is the result of the executing code fragment below?</p> <pre><code>//suitable #includes class Text { public: Text(const std::string &amp;text):data(new char[text.size()+1000]){ std::copy(text.begin(),text.end(),data); } ~Text(){ delete [] data; } void print() const{ std::cout &lt;&lt; data &lt;&lt; std::endl; } private: char *data; }; int main(int, char *[]) { Text outer("hello"); { const Text inner("world"); outer = inner; } outer.print(); return 0; } (No idea abou the answer) a) prints "world", but there is a buffer overflow in the constructor b) prints "world", no problems anywhere c) prints "hello" d) none of the above </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USWill
    1. USant1bball
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POC++ Quiz Questions
      1. This table or related slice is empty.
      1. VTDownMod
    2. VO
      singulars
      1. POC++ Quiz Questions
      1. This table or related slice is empty.
      1. VTDownMod
    3. VO
      singulars
      1. POC++ Quiz Questions
      1. This table or related slice is empty.
      1. VTDownMod
    1. COThere are too many questions in this post. Why don't you **choose one**, and focus on it (including what do you think the answer is), and after you are done with one - post a new question (if needed) for the second?
      singulars
      1. POC++ Quiz Questions
      1. USamit
    2. COThis is mostly pretty bad code. I wouldn't put any effort into making sense out of it.
      singulars
      1. POC++ Quiz Questions
      1. USPete Becker
    3. COThis question appears to be off-topic because it is about tons of questions
      singulars
      1. POC++ Quiz Questions
      1. USRiaD
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload