1) Discuss (In depth) on const keyword in C++, like the behaviour it exhibits when used on primitive data types, objects, pointers.
- What are pointers to constants (const char *p, char const *p) and constant pointers (char *const p) Explain const on member functions of a class.
- How can I change a data member in const member function?(mutable).
- Why would I want to do that? (One instance is, to do the lazy initialization on a datamember if that variable is a pointer and being used withn const member function)
2) What are static members?
- Howare static member functions different to this?
- Can I call a non static member within static member functions?(No)
- What are static data members?
- Can I control the order of static member initialization?(No)
3) What are exceptions?
- What happens when I throw an exception from constructor and destructor. Explain the implications with examples.
- What are exception safety rules.
- What happens when a call to new fails while creating memory on the heap.(bad_alloc exception)
4) What are different mechanisms of type casting?
- Inparticular discuss the difference between static_cast and dynamic_cast.
- What happens when a dynamic_cast fails? (throw an exception bad_cast or return null?)
5) What is polymorphism? (check understanding of dynamic binding, virtual functions)
- Why would I need a virtual destructor?
- In case I am writing a base class, when would I use pure virtual functions? (Interface definition)
- While writing the base class why shouldn't I make the destructor always virtual?
6) What are smart ptrs?
- explain what Auto ptrs and shared ptrs are.
- What are the issues concerned with auto ptrs and shared ptrs.
7) What are STL containers?
- Elaborate on the factors to choose the right type of container for requirment?
- Can I use auto pointers within containers?
- What is the complexity of inserting into a list(O(1), as it is implemented using doubly link list)?
- What is worst case complexity of searching an element in a unsorted vector (O(N))and a sorted vector(O(LogN) as it employs binary search)?
8) What is multi threading?
- Explain the deadlock scenario and how can I resolve this issue. (Elaborate in detail)
9) What is the difference between a Copy constructors and Assignment operators.
- When is it appropriate and not appropriate to use these operators
10) Give an instance where Member-wise initialisation is useful
11) Qhat is the difference between a Struct and a Class?
- Can you inherit from a Struct?
12) RTTI – Dynamic Cast – what is it what are the return types?
13) Which design patterns have you used in the past ?
- Can you explain what it is?
- Would this pattern require any additional considerations when used in a multi-threaded environment?
14) What STL container have you used?
- What influenced your decision to use them?
- What are the performance characteristics of these STL containers? (Big 'O' notation is sufficient)
15) Exception handling – what is it?
- If you are unable to trap an exception at a particular level what of you do (throw)
16) Deadlocking what is it and give an example of how you can design your code to overcome it ?
17) Post Increment V pre increment which is more efficient and why.
18) What is the last good c++ book that you read?
19) If you create memory on the heap within a function and you unexpectedly return from that function how do you ensure that that memory is deleted?
20) How do you make a const function have non – const ability?
21) What's a race condition?
22) What's an associative container in STL?
23) What's object slicing?
24) What is the benefit of object oriented programming?
25) What is generic feature of a class used in map? are there any limitation on it?
26) Copy constructor, what is it?
- Deep copy,
- Shallow copy
- How do you prevent a class from being copied
27) What does the 'explicit' modifier mean?
28) Initialization lists, purpose, advantage over using the constructor body
29) Dynamic casts
- Possible data types
- What does the cast return
- Can you cast generic data types
- Can you cast references
- What happens if reference cast is illegal
- Internals about dynamic casts: given as cast with base and derived class, how is it internally determined, if the cast is correct.
- Performance issues with dynamic casts
- What happens, if you have many of them?
- Why do we need them anyway
30) What is Polymorphism?
31) What are Design patterns?
- Name some and describe briefly
32) Multi-threading: what is it?
- Define deadlock, and how to prevent them.
33) Name container classes in STL
- What are the run time complexity classes for those containers?
- What internal search structure is used for stl map? (red-black trees)
34) What is a hash table?
- What is it?
- Complexity class
- What is a collision?
- What is the search complexity, if you have maximum number of collisions?
35) boost: what libraries have you used in the past
- Have you used smart pointers
36) Which C++ books have you read to prepare yourself
- Wuestions about the content of the book (it's not enough that you just name them, you should have read them too!!!)
37) What C++ constructs that support OO?
38) What do you need a virtual destructor in a base class
39) What mechanism in C++ allows the right method in a derived class to be called?
40) What does new return if it fails?
41) What methods does a compiler automatically create for you if you write an empty class?
42) What is encapsulation?
