Test Your C++ Knowledge with the Ultimate UB Quiz

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adaptablebastio

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adaptablebastio

6/20/2024

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Anonymous

12/19/2024

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Answers

1. What does UB stand for in C++?

Undefined Behavior

Unbounded Buffer

2. Which of the following is NOT a cause of UB in C++?

Array index out of bounds

Valid memory allocation

3. What can UB lead to in a program?

Crashes or unexpected behavior

Compiling errors

4. Accessing a null pointer in C++ results in?

Undefined Behavior

Defined Behavior

5. Dereferencing an invalid iterator in C++ causes?

Undefined Behavior

Memory Leak

6. Using an uninitialized variable in C++ can lead to?

Undefined Behavior

Compile-time warning only

7. Does integer overflow cause UB in C++?

Yes, it can lead to UB

No, it always results in a specific wrap-around value

8. What happens when a program divides by zero in C++?

Undefined Behavior

Exception thrown

9. Modifying a const object in C++ results in?

Undefined Behavior

Compilation Error

10. Which of the following can lead to UB?

Violating type-aliasing rules

Assigning a new value to a var

11. Calling a deleted function in C++ leads to?

Undefined Behavior

Compilation Error

12. Does using a pointer after it has been deleted cause UB?

Yes, it causes UB

No, it is safe

13. Are out-of-bounds array accesses considered UB?

Yes, they result in UB

No, they are caught at compile-time

14. What does reading from a union member other than the last one written to lead to in C++?

Undefined Behavior

Compiler-dependent behavior

15. Is calling a virtual function from a destructor UB?

Yes, it can cause UB

No, it is always safe

16. Using an object after it has been moved from can lead to?

Undefined Behavior

Defined behavior if using std::move

17. Accessing a member of a structure through a differently-typed pointer variable causes?

Undefined Behavior

No problems, fully allowed

18. Which of the following does NOT result in UB?

Using a properly initialized STL container

Double free on dynamic memory

19. Reinterpreting a pointer of one type to another incompatible type leads to?

Undefined Behavior

Valid pointer conversion

20. Is modifying a const object through a const_cast defined behavior?

No, it results in UB

Yes, it is defined behavior

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