ICSE − Q & A

In bubble sorting or selection sorting of Arrays .... If there is a Question to arrange in descending order can we just change the part of the program that displays the answer ... i mean the program will have the logic of ascending order but program gets printed in descending order by just changing the order of displaying arrays
or is it mandatory that we have to change the logic part of the program only(descending logic)???

Your task is to construct a building which will be a pile of n cubes. The cube at the bottom will have a volume of n^3, the cube above will have volume of (n-1)^3 and so on until the top which will have a volume of 1^3.

You are given the total volume m of the building. Being given m can you find the number n of cubes you will have to build?

The parameter of the function findNb (find_nb, find-nb, findNb) will be an integer m and you have to return the integer n such as n^3 + (n-1)^3 + ... + 1^3 = m if such a n exists or -1 if there is no such n.

In school , I do not write comments while programming yet I get marks . 
So , is it necessary to write comments in Boards ?

What are Coprime numbers?

Can any one suggest the code for :
* * * *
*      *
*      *
* * * *

Do we have Bitwise operators in our syllabus ??

**notes for those who find this confusing **

TYPE CASTING/CONVERSION is implicit +explicit 
COERCION  is implicit 
CASTING is explicit.

ANY TDA STUDENT HERE? YA SAB COMP XD!

Write a program to accept a sentence and delete all the uppercase characters present in the string. The program also counts the number of deleted characters and also replace the vowels with "*" . Print the new replaced string.
Sample input : The Capital of India is New Delhi.
Output : h*    *p*t*l   *f  nd**   *s  *w  *lh*.

Write a java program to input a sentence and to display sentence in reverse order.