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POSome real interview questions C++
 

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    <p>So I compiled some interview questions I was asked. I answered some and noted down the answers to the ones I could not. Some questions are not C specific and are general. Everyone can add their input to the questions. No obligation to follow the answers I wrote!</p> <p>Q1: What would be the size of a pointer on a 2 bit system and a 16 bit system?<br> A: 2 bits and 2 bytes</p> <p>Q2: Why did we need OOPs/classes when in C we had structs and could achieve the same?<br> A: Leave this to SO users to answer!</p> <p>Q3: If you were told to divide a program into distinct parts for an embedded system, what would they be?<br> A: IO part and CPU part</p> <p>Q4: What are some hardware level benefits of using threads? Any give a single example for a single CPU (single core) A: One thread would be doing some number crunching, the other just living for a millisec could signal an event to read the hard drive.</p> <p>Q5: If we had a pointer <code>char* p = NULL</code>, what would <code>cout&lt;&lt;sizeof(*p)</code> print? A: the size of <code>char</code>, not <code>char*</code>. Which means the amount of memory it can point to, not the size of the pointer itself</p> <p>Q6: Which functions do function pointers point to in a virtual table? A: Virtual functions</p> <p>Q7: How would you calculate how many threads a program needs to generate for an optimal performance for a single CPU (single core)? Will you do a physical test or can you automate your program? Give an example. Or both, again an example.<br> A: SO users your answer here!</p> <p>Q8: If a virtual function (not pure), is inheritance, is not implemented in the derived class. Now, If I have a base class pointer to a derived class object, and then make a call <code>baseObject-&gt;function()</code>, what will happen? Will there be any problem at any point in compile time/run time? A: None. :)</p>
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    1. COCan you ask these as separate questions? And please search for duplicates before posting, I'm sure some of these questions have already been answered on SO.
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    2. COWell, i thought so but I'd put Q# so that anyone answering would write and answer as A# or something to make it easier to read.
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    3. COWhat position do those questions cover ? Junior Level ? Mid?
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      1. USMuggen
 

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