18 Lecture

What is self-assignment? a) Assigning a pointer to a different object b) Assigning an object to itself c) Assigning a value to a constant variable d) Assigning a value to a variable of a different data type Answer: b What can happen if self-assignment is not handled properly? a) Memory leaks b) Undefined behavior c) Corruption of the object's data d) All of the above Answer: d Which operator is commonly affected by the self-assignment problem? a) Comparison operator b) Unary operator c) Binary operator d) Assignment operator Answer: d What is a common technique for handling self-assignment in the assignment operator? a) Copying the object to a temporary object before performing the copy b) Checking if the object being assigned is the same as the original object before performing the copy c) Swapping the object with a copy of itself d) None of the above Answer: b What is the purpose of handling self-assignment in the assignment operator? a) To avoid memory leaks b) To prevent undefined behavior c) To ensure proper functioning of the program d) All of the above Answer: d Which of the following is a potential issue that can arise from self-assignment? a) Data corruption b) Memory leaks c) Undefined behavior d) All of the above Answer: d Why is it important to properly handle self-assignment in the assignment operator? a) To prevent crashes b) To avoid undefined behavior c) To optimize program performance d) All of the above Answer: b How can self-assignment be checked in the assignment operator? a) Using a try-catch block b) Using a conditional statement c) Using a loop d) None of the above Answer: b Which of the following is an example of self-assignment? a) a = b b) a = a c) a = &b d) a = *b Answer: b What can happen if self-assignment is not handled properly in a program? a) The program may crash b) The program may behave unpredictably c) The program may run slower than expected d) All of the above Answer: d

What is the self-assignment problem? Answer: The self-assignment problem is a programming issue that occurs when an object is assigned to itself, leading to undefined behavior or data corruption. Why is it important to handle self-assignment in the assignment operator? Answer: Proper handling of self-assignment in the assignment operator is important to avoid undefined behavior and ensure the proper functioning of the program. What are some potential issues that can arise from self-assignment? Answer: Some potential issues that can arise from self-assignment include data corruption, memory leaks, and undefined behavior. How can self-assignment be checked in the assignment operator? Answer: Self-assignment can be checked in the assignment operator by comparing the address of the object being assigned to the address of the current object. What is a common technique for handling self-assignment in the assignment operator? Answer: A common technique for handling self-assignment in the assignment operator is to check if the object being assigned is the same as the original object before performing the copy. How can the self-assignment problem be avoided? Answer: The self-assignment problem can be avoided by properly implementing the assignment operator to handle self-assignment. What is the purpose of handling self-assignment in the assignment operator? Answer: The purpose of handling self-assignment in the assignment operator is to prevent undefined behavior and ensure the proper functioning of the program. Why is memory management important when handling self-assignment in the assignment operator? Answer: Memory management is important when handling self-assignment in the assignment operator to avoid memory leaks and ensure proper use of memory. Can self-assignment occur in other operators besides the assignment operator? Answer: Self-assignment can occur in other operators, but it is most commonly an issue with the assignment operator. How can the self-assignment problem impact the performance of a program? Answer: The self-assignment problem can impact the performance of a program by causing it to run slower than expected or even crash if not properly handled.