Roxar @NDC 2015

roxar.ndc2015
Quiz by roxar.ndc2015, updated more than 1 year ago
roxar.ndc2015
Created by roxar.ndc2015 over 6 years ago
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Description

Take the Quiz and enter the draw for a USB charger at the end of each day and finally an iPad Mini on Friday.

Resource summary

Question 1

Question
What is true about a Smart Pointers in C++?
Answer
  • There's an implementation available as part of the C++ standard library
  • The objects they point to are automatically deleted by the garbage collector
  • They are used to help ensure that programs are free of memory and resource leaks and are exception-safe
  • It was invented by John Smart

Question 2

Question
What is the order that objects in an array are destroyed in C++? MyClass objs[10];
Answer
  • The order is undefined
  • Objects will be destroyed in the same order as they were created
  • The order of destruction is the reverse of the order of construction

Question 3

Question
You were given a chunk of memory and constructed a new object in that chunk using placement new. What do you do to destroy that object again?
Answer
  • The destructor will be called automatically when the chunk of memory is freed
  • Placement new doesn’t require destruction of constructed objects
  • I will manually invoke the destructor of the object
  • A call to placement delete is necessary to destroy the object
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