Java | JSP | JSF Answers

1) What affect do you think a heavily fragmented disk has on the performance of Sequential and Random access methods?
2) Why do you want a File System to cache file data in memory? What are the downsides to caching File data? When is the cached contents written to disk?
3) How does Cluster Size affect the efficiency of the File System?

There are 2000 students in a course. They wrote a mathematics test which was scored out of 40 and then converted to percentage.

1. Draw a flowchart that reads the name, sex and score of each student, and outputs the names of the female students that scored below 45% and how many they are.

2. Write a pseudocode program that reads the name, sex and score of each student, and outputs the names of the female students that scored below 45% and how many they are.

public class P15 {
public static void main(String[] args) {
int[] v = { 0, 1, 2, 3 };
System.out.println(v[1] + ", " + v[2] + ", " + v[3]);
fiddle(v, v[2]);
System.out.println(v[1] + ", " + v[2] + ", " + v[3]);
fiddle(v, v[3]);
System.out.println(v[1] + ", " + v[2] + ", " + v[3]);
}

public static void fiddle(int[] array, int idx) {
array[idx] = array[idx - 1] + array[idx - 2];
}
}

Write a Java program that meets the following requirements:-
Using up to and including Chapter 20 concepts.
Found at the end of chapter 20, #20.1 Display words in ascending alphabetical order, but with these
changes. Make it a GUI program using JavaFX. Display the input and include a button the user can click
which will then display the text in alphabetical order.

How to code a simple register/login for a member to a gym

Write a public instance method for the Garage class called addCustomer(),
which takes four arguments as in the following header:public void
addCustomer(String regNo, String name, String address, int
area)
and returns no value.
The method should create an instance of Customer and then add it to the map
referenced by the instance variable customers with regNo as the key.
Test your method in the OUWorkspace by creating an instance of Garage and
assigning it to a variable called aGarage. Then send addCustomer()
messages to the Garage object to add three customers as shown in the table
above. Inspect aGarage to confirm that the customers were added.
Save the statements from the OUWorkspace that you used to add the
customers (for example in the project’s README.txt file) for use later in this
question.

Write a program that will accept an array of 10 integer (0-999) then prints a table the equivalent binary, octal
and hexadecimal.

Create a Program that will ask the user to enter a number n then display n3, (n+1)3,( n+2)3,… 5 times. Use any of the loop statement to implement the program.

Alice is throwing a party with N other guests, including Bob. Bob starts a rumor about Alice by telling it to one of the other guests. A person hearing this rumor for the first time will immediately tell it to one other guest, chosen at random from all the people at the party except Alice and the person from whom they heard it. If a person (including Bob) hears the rumor for a second time, he or she will not propagate it further. Write a program to estimate the probability that everyone at the party (except Alice) will hear the rumor before it stops propagating. Also calculate an estimate of the expected number of people to hear the rumor. For each line of the code, add comments.

Provide a programming example in which multithreading does not provide better performance than a single-threaded solution