Question

Which one of the following situations does NOT have a retain cycle? Object 1 of struct...

  1. Which one of the following situations does NOT have a retain cycle?
  1. Object 1 of struct A is assigned to a member of Object 2 of struct B, while Object 2 of struct B is assigned to a member of Object 1 of struct A.
  2. Object 1 of class A is assigned to a member of Object 2 of class A, while Object 2 of class A is assigned to a member of Object 1 of class A.
  3. Object 1 of class A is assigned to a member of Object 2 of struct B, while Object 2 of struct B is assigned to a member of Object 1 of class A.
  4. Object 1 of class A is assigned to a member of Object 2 of class B, while Object 2 of class B is assigned to a member of Object 1 of class A.
  1. Which of the followings are the potential consequences of memory leak? Select all that apply.
  1. The program keeps consuming memory.
  2. The program tries to read data from the memory space of another program.
  3. The program tries to write data to the memory space of another program.
  4. Some garbage values remain in the memory, but they cannot be released.
  1. Which of the followings does NOT resolve a retain cycle?
  1. Use unowned reference.
  2. Use weak reference
  3. Use struct instead of class.
  4. Implement deinitializers

  1. What can we do with function types? Select all that apply.
  1. Use function type to declare a variable
  2. Pass a parameter of a function type to a function.
  3. Return a data of a function type from a function.
  4. Use function type to declare a property of a class.
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Aneswer the above Questions

  1. Which one of the following situations does NOT have a retain cycle?
    1. Object 1 of class A is assigned to a member of Object 2 of class B, while Object 2 of class B is assigned to a member of Object 1 of class A.
  2. Which of the followings are the potential consequences of memory leak? Select all that apply.
    1. The program keeps consuming memory.
    2. The program tries to read data from the memory space of another program.
    3. The program tries to write data to the memory space of another program
  3.   Which of the followings does NOT resolve a retain cycle?
    1. Use weak reference
  4. What can we do with function types? Select all that apply.
    1. Pass a parameter of a function type to a function.
    2. Return a data of a function type from a function
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