ALGORITHM An algorithm is any special method of solving a certain kind of problem or an idea behind the computer programs. More specifically , Algorithm refers to a precise method useable by a computer for the solution of a particular computational problem. CLASSES OF ALGORITHM Algorithms can be classified depending […]
INTRODUCTION TO POINTERS Pointers are extremely flexible and powerful tool for programming over a wide range of applications. The use of pointers offers a great degree of flexibility for manipulating data in programs and quicker and memory efficient. Most of the learners feel that understanding pointer is a very daunting […]
INTERPRETERS An interpreter is another type of program translator used for higher level languages into machine level language. It takes one statement of higher level language and translate it into machine language which is immediately execute it. Translation and execution are carried out for each statement. It differs from compiler, […]
COMPILERS A compiler is a translating program that translates the instruction of a high level language into machine level language. A compiler is so called because it compiles a set of machine language instruction for every program instruction of a high level language. A program is written by a programmer […]
INTRODUCTION TO STACK Stack is one of the most commonly used linear data structure of variable size. In linear data structure discussed so far i.e array , insertion and deletion of an element can take place at any position of the array but in case of stack, the insertion and […]
Before understand this you will need to clear the concept of tracks and sector. fig 1 In fig 1, red color shows a track , purple color shows disk sector and cyan color shows track sector. Seek […]
RSA ALGORITHM The full form of RSA is Ron Rivest, Adi Shamir and Len Adleman who invented it in 1977. The RSA cryptosystem is the public key cryptography algorithm . It can be used to encrypt a message without the need to exchange a secret key separately. It can be […]
Monoalphabetic Substitution Cipher in which every alphabet have unique alphabet and we can not use same for another alphabet in cipher text. Polyalphabetic cipher was invented by Johannes Trithemius in the 15th Century. To remove this limitation, Polyalphabet cipher is introduced in which we can use alphabet for any number. […]
QUESTION: An Internet Service Provider (ISP) is granted a block of addresses starting with 145.75.0.0/16. The ISP needs to distribute these addresses to three groups of customers as follows: (a) The first group has 128 customers; each needs 256 addresses. (b) The second group has 128 customers; each needs 64 […]
Monoalphabetic Substitution Cipher: It also known as substitution cipher. Replacement of alphabets or digits are fixed for each letter. For example: Plain text : nikhilarora Cipher text: OJLIMBSPSB In the above example, the value of ‘a’ is fixed for every time as ‘B’ and every alphabet is fixed for separate […]
