ICSE − Q & A

Pls tell the concept of frequency programs na!!!
Like to frequency of a digit, letter, word........

USeful Information. MUST note:
Instance methods can access instance variables and instance methods directly.
Instance methods can access class variables and class methods directly.
Class methods can access class variables and class methods directly.
Class methods cannot access instance variables or instance methods directly—they must use an object reference. Also, class methods cannot use the this keyword as there is no instance for this to refer to.

Secondly, someone asked to repost the method to learn Operator P., here it is: 
Way to learn precedence of operator (I learnt this way before my prelim1 and easily succeeded in learning)
Mnemonic: PUMA - REBEL - CA
Expansion:
P - Paranthesis (), []
U - Unary ++,--, !
M - Multipicative *, /, %
A - Additive  +, - 
R - Relational >, >=, <, <=
E Equality == , !=
B - Bitwise And, Bitwise Or, Bitwise Not
E - Extra
L - Logical AND, Logical Or
C - Conditional assignment (ternary)
A - Assignment =, +=, -=,/=

(Eco App) What are some examples for the following taxes? 
(progressive, proportional, degressive, regressive)

https://www.google.co.in/search?q=sizes+of+primitive+data+type&source=lnms&tbm=isch&sa=X&ved=0ahUKEwj-iqjN_4_TAhVKrI8KHYFyBfIQ_AUIBigB&biw=1366&bih=651#imgrc=N1sZDYoqbvLLjM:&spf=191 guys this is very important for tomorrow (acc to my teacher)  just go through it :) hope it helps.

If the question is asked to define ,is that particular definition enough for 2 marks in computer  applications.

http://www.respaper.com/sdfg/9967-pdf.html?cmd=conv q2-b1

is recursion there in our syllabus????

Can someone explain these terms fully-
1.object
2.class
3.abstraction
4.Encapsulation
5.Modularity
6.Information hiding
7.Literal
8.difference between && and &
9.Difference between || and |

Main points to be noted while writing the programs ,if any plz share!!!writing wt carries weightage???

do we create a main method when not specified?