D. A spike of electricity. They are fast and have a short duration.
public class Circle {
// the private data members
private double radius;
private double area;
private double diameter;
public void setRadius(double r)
{
radius = r;
}
public double getRadius()
{
return radius;
}
public double computeDiameter()
{
return radius * 2;
}
public double computeArea()
{
return ((radius * radius) * 3.14);
}
}
Answer:
The answer to this question is given below in the explanation section.
Explanation:
The correct answer to this question is C i.e. String s = "apluse";
The rule or syntax of declaring string in any programming language is given below:
String variable-name = "yourString";
For declaring string variable, first, you write "String" that is a keyword of a programming languages for declaring string variables, such as int before the variable name for declaring integer variable. Then, you need to write a meaningful name of the string as a variable. After string variable name, you need to put the equal operator and then write the string in double quotation("") marks and after that put the instruction terminator that is ";".
So, according to this syntax, option C is correct.
While other options are not correct because:
In option a, string is not encapsulated in double quotation. Option B does not have varaible type such as String and Option E does not have variable name and its value also. So, only option C is correct and all other except C are incorrect.
Answer and Explanation:
Messages flow across an SDN controller's:
Northbound APIs:
• Messages which help in read/write state of the network and developing flow tables within the
state management layer.
• Notifications for the state-change events.
• The interaction between the controller and network control applications is done through the
northbound interface.
• Network control applications send messages to the controller.
Southbound APIs:
• Messages which help for the up-to-date view of the network's state like message for the
attached link has gone up or down, new devices are joined the network, or indications of the
device is up or down.
• Controller's southbound interface is the communication among the controller and the controlled
devices. Controlled devices are the recipients of the messages sent form the controller.
