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15. The delete keyword tells the compiler that the address pointed to by the pointer will no longer be used. What do you think will happen if we access a deleted memory location? This is called dangling reference. Place a check (✔) beside your answer. delete city_ptr; std::cout << "City name after deletion: *city_ptr << "\n"; a. The program may crash if another program used the deleted memory address. << b. The system guarantees there will be no errors. c. The memory address remains reserved for our program so no other program can use it (wasted resource). 16. If we forget to call delete on a memory address, it will remain reserved in the heap. What is a potential issue when a memory address is not deleted? See the code below for an example. This is called a memory leak. Place a check (✔) beside your answer. for (int i = std::string* temp std::string ("garbage"); 0; i<10; i++) { = new 11 } a. The program may crash if another program used the memory address. b. The system guarantees there will be no errors. c. The memory address remains reserved for our program so no other program can use it (wasted resource).

15. The delete keyword tells the compiler that the address pointed to by the pointer will no longer be used. What do you think will happen if we access a deleted memory location? This is called dangling reference. Place a check (✔) beside your answer. delete city_ptr; std::cout << "City name after deletion: *city_ptr << "\n"; a. The program may crash if another program used the deleted memory address. << b. The system guarantees there will be no errors. c. The memory address remains reserved for our program so no other program can use it (wasted resource). 16. If we forget to call delete on a memory address, it will remain reserved in the heap. What is a potential issue when a memory address is not deleted? See the code below for an example. This is called a memory leak. Place a check (✔) beside your answer. for (int i = std::string* temp std::string ("garbage"); 0; i<10; i++) { = new 11 } a. The program may crash if another program used the memory address. b. The system guarantees there will be no errors. c. The memory address remains reserved for our program so no other program can use it (wasted resource).

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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int main() { std::string* city_ptr new std::string("Fullerton"); std::cout << "Pointer address: << &city_ptr << "\n"; 11 std::cout << "Pointer value: << city ptr << "\n"; std::cout << "Dereferenced value: " << *city_ptr << "\n"; delete city_ptr; city_ptr = nullptr; return 0; } Screen output* Pointer address: 0x7ffe40b1ac30 Pointer value: 0xb832c0 De ferenced value: Fullerton Memory addresses are usually different every time you run the program because it depends on the system's memory availability. Symbol Table Variable Scope Type Name city_ptr main() std::string* 0x7ffe40b1ac30 memory addresses are often represented in hexadecimal format (https://en.wikipedia.org/wiki/Hexadecimal) Memory Visualization Stack (~8 MB limit) Memory Address Ox7ffe40b1ac30 Ox7ffe40b1ac37 Value Memory address* Oxe5c2c0 Heap (virtually unlimited) Memory Address Oxe5c2c0 Oxe5c2df Value std::string "Fullerton"
Transcribed Image Text:int main() { std::string* city_ptr new std::string("Fullerton"); std::cout << "Pointer address: << &city_ptr << "\n"; 11 std::cout << "Pointer value: << city ptr << "\n"; std::cout << "Dereferenced value: " << *city_ptr << "\n"; delete city_ptr; city_ptr = nullptr; return 0; } Screen output* Pointer address: 0x7ffe40b1ac30 Pointer value: 0xb832c0 De ferenced value: Fullerton Memory addresses are usually different every time you run the program because it depends on the system's memory availability. Symbol Table Variable Scope Type Name city_ptr main() std::string* 0x7ffe40b1ac30 memory addresses are often represented in hexadecimal format (https://en.wikipedia.org/wiki/Hexadecimal) Memory Visualization Stack (~8 MB limit) Memory Address Ox7ffe40b1ac30 Ox7ffe40b1ac37 Value Memory address* Oxe5c2c0 Heap (virtually unlimited) Memory Address Oxe5c2c0 Oxe5c2df Value std::string "Fullerton"
15. The delete keyword tells the compiler that the address pointed to by the pointer will no longer be used. What do you think will happen if we access a deleted memory location? This is called dangling reference. Place a check (✔) beside your answer. delete city_ptr; std::cout << "City name after deletion: *city_ptr << "\n"; a. The program may crash if another program used the deleted memory address. << b. The system guarantees there will be no errors. c. The memory address remains reserved for our program so no other program can use it (wasted resource). 16. If we forget to call delete on a memory address, it will remain reserved in the heap. What is a potential issue when a memory address is not deleted? See the code below for an example. This is called a memory leak. Place a check (✔) beside your answer. for (int i std::string* temp std::string ("garbage"); = 0; i<10; i++) { = new "1 } a. The program may crash if another program used the memory address. b. The system guarantees there will be no errors. c. The memory address remains reserved for our program so no other program can use it (wasted resource).
Transcribed Image Text:15. The delete keyword tells the compiler that the address pointed to by the pointer will no longer be used. What do you think will happen if we access a deleted memory location? This is called dangling reference. Place a check (✔) beside your answer. delete city_ptr; std::cout << "City name after deletion: *city_ptr << "\n"; a. The program may crash if another program used the deleted memory address. << b. The system guarantees there will be no errors. c. The memory address remains reserved for our program so no other program can use it (wasted resource). 16. If we forget to call delete on a memory address, it will remain reserved in the heap. What is a potential issue when a memory address is not deleted? See the code below for an example. This is called a memory leak. Place a check (✔) beside your answer. for (int i std::string* temp std::string ("garbage"); = 0; i<10; i++) { = new "1 } a. The program may crash if another program used the memory address. b. The system guarantees there will be no errors. c. The memory address remains reserved for our program so no other program can use it (wasted resource).
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