Java | JSP | JSF Answers

In a linked list memory allocated for the nodes is sequential. True/False

A singly linked list can be traversed in either direction. True/False

In a linked list the nodes are always inserted either in the beginning or at the end because a linked list is not a random access data structure. True/False

The reference variable pointing to the first node of linked list should be used to traverse the list. True/False

Prompt the user to enter data for 10 employees.If the user try to enter more than 10 employees,it will be an error.For each employee,the user will enter their last name(1 word only),what time they started work today(first ask for the hour,then the minute),and what time they finished work today(first ask for the hour,then the minute).For example,if the person started work at 2.20PM,the user would enter 14 for the hour & 20 for the minute.Note that the time format to be used is 24hours format.Required to validate the data entered correctly,that the employee finished work after they started, & that both times entered are for the same day.The program is to determine how many hours each employee worked that day.It will output a nicely formatted report listing all of the employees along with the amount of time they worked(listed as hours & minutes).The program should output the average amount of time worked.(1 hour-$12,continuously 4 hours of working-additional $10).Required programming style with modules & arrays.

Happy Numbers.. Java Program

A happy number is built by adding the squares of its digits, doing this permanently, the numbers will end in 1 or 4.

if a positive integer ends with 1, then it is a happy number.
the first few happy numbers are: 1,7,10,13,19,23,28 ...

solution : 13 = 1^2 +3 ^2 = 1+9 = 10
10 = 1^2 + 0+2 = 1+0 = 1

how many positive happy numbers are there in less than 300,000?

How to add the rows in pascal's triangle without using an array?
the user should input a row number and the output will be the sum above the input row and the row below the input row.

Assume that the row number is up to 30.

Sample Input:

Enter row no: 4

Output:

Sum of numbers in row 5 is 32.
Sum of all numbers above 4 is 15.

In a linked list the order of the elements is determined by the order in which the nodes were created to store the elements. TRUE/FALSE

The reference variable pointing to the first node of a linked list should be used to traverse the list. TRUE/FALSE

A singly linked list can be traversed in either direction. TRUE/FALSE

In a linked list memory allocated for the nodes is sequential. TRUE/FALSE

In a linked list the nodes are always inserted either in the beginning or at the end because a linked list is not a random access data structure. TRUE/FALSE

Program in java to accept 10 names and their corresponding phone number in two 1 dim array. Then accept the name from the user display the corresponding phone number. If the name is not present in the array then display the corresponding array. Please help.

ArrayList<Double>a;
a=new ArrayList<Float>();

What is the error in the code segment?

I want to create a reusable component that would change the background color of an interface after a specific interval,how do I go about that?

Write the body of method called maxFrequency:

public static char maxFrequency(String s){

which takes a string (length >=1) as parameter (containing characters from a to z; only small caps), calculates frequencies of characters in the string and returns the character with maximum frequency. For example, if the parameter string is "abcabcabca", the method returns 'a'.