Answer: The difference between the scope and linkage is as follows:-
- Scope of the variable is defined as the variable view from different program parts whereas the linkage is described as the link that is made between the variable and the declaration function having the common name.
- Scope of variable describes about the existing time of the variable in the program whereas linkage is defined for the name of variable present in the program is available at all time .
Solution :
a.
public Book(
, String author, 
, int 
) {
this.
= ;
this.
= ;
this.
= ;
this. = ;
b). 
getTitle() {
return ;
}
setTitle() {
this. = ;
}
getAuthor() {
return author;
}
setAuthor(String author) {
this. = ;
}
getPublisher() {
return ;
}
setPublisher(String ) {
this. =;
}
public int get() {
return ;
}
set(int ) {
this. = ;
}
Answer:
Did you mean layer 3 switch? Because a router always operates at layer 3
Explanation:
If the answer is yes, then a layer 3 is a switch that combines the functions of a switch and a router. So it is capable of operate layer 2 and layer 3. Some of its benefits are: Support routing between VLAN, decrease network latency because the packets don’t have to make extra hops to go through a router and reduce security management. But they are really expensive and lack of WAN functionality so they are used mostly for large intranet environments.
