
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Transcribed Image Text:QUESTION 17
The use of smart pointers makes the implementation of the clear method overly complex.
O True
O False
QUESTION 18
There are two types of traditional pointers - raw pointers and well-done pointers.
O True
False
QUESTION 19
When is the reference count of an object managed by a shared pointer decreased by 1?
O When a shared pointer goes out of scope or when a shared pointer is assigned an invalid value
O None of these
When a shared pointer goes out of scope or when a shared pointer is assigned the value nullptr
O When a shared pointer's copy constructor is invoked or when a shared pointer is assigned the value nullptr
QUESTION 20
What is an object's reference count?
The number of times it is used in a line of code
The number of raw pointers that reference objects referenced by smart pointers
The number of pointers that own an object
O The number of aliases that reference it
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- Given variables category, heat, and voltage, declare and assign the following pointers: • character pointer categoryPointer is assigned with the address of category. • integer pointer heatPointer is assigned with the address of heat. • double pointer voltagePointer is assigned with the address of voltage. Ex: If the input is V 150 5.5, then the output is: Product category: V Operational limit: 150 degrees at 5.5 volts. 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20} char category; int heat; double voltage; *Your code goes here */ cin>> category; cin >> heat; cin>> voltage; cout << "Product category: cout << "Operational limit: return 0; << *categoryPointer << endl; << *heatPointer << degrees at << fixed << setprecision (1) << *volarrow_forwardC+++ Coding I need help wtih Pointer Basics Please see attached.arrow_forwardDiscuss the following. a. Pointersb. Arraysc. Structuresd. Classese. functionsarrow_forward
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