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6. Suppose we have two classes, one of which extends the other: class Base (...); class Derived: public Base (...); Now suppose we execute the following program: line 1 int main() { line 2 Base b; line 3 Derived* d = new Derived; line 4 b = d; line 5 delete d; line 6 return 0; line 7 } What is the static type of variable b after line 4 has been executed and before line 5 is executed? 1.) Base 2.)Base & 3.)Derived 4.)Derived & 5.) Derived [The dynamic type of a variable can change as the result of an assignment, but the static type is fixed - it's the one given in the variable's declaration.]

6. Suppose we have two classes, one of which extends the other: class Base (...); class Derived: public Base (...); Now suppose we execute the following program: line 1 int main() { line 2 Base b; line 3 Derived* d = new Derived; line 4 b = d; line 5 delete d; line 6 return 0; line 7 } What is the static type of variable b after line 4 has been executed and before line 5 is executed? 1.) Base 2.)Base & 3.)Derived 4.)Derived & 5.) Derived [The dynamic type of a variable can change as the result of an assignment, but the static type is fixed - it's the one given in the variable's declaration.]

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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6. Suppose we have two classes, one of which extends the other: class Base {...}; class Derived: public Base {...}; Now suppose we execute the following program: line 1 int main() { line 2 Base' b; line 3 Derived* d = new Derived; line 4 b = d; line 5 delete d; line 6 return 0; line 7 } What is the static type of variable b after line 4 has been executed and before line 5 is executed? 1.)Base 2.)Base & 3.)Derived 4. )Derived & 5.)Derived [The dynamic type of a variable can change as the result of an assignment, but the static type is fixed - it's the one given in the variable's declaration.]
Transcribed Image Text:6. Suppose we have two classes, one of which extends the other: class Base {...}; class Derived: public Base {...}; Now suppose we execute the following program: line 1 int main() { line 2 Base' b; line 3 Derived* d = new Derived; line 4 b = d; line 5 delete d; line 6 return 0; line 7 } What is the static type of variable b after line 4 has been executed and before line 5 is executed? 1.)Base 2.)Base & 3.)Derived 4. )Derived & 5.)Derived [The dynamic type of a variable can change as the result of an assignment, but the static type is fixed - it's the one given in the variable's declaration.]
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