Well, tricky Java interview questions are those questions which have some surprise element on it. If you try to answer a tricky question with common sense, you will most likely fail because they require some specific knowledge. Most of the tricky Java questions comes from confusing concepts like function overloading and overriding, Multi-threading which is really tricky to master, character encoding, checked vs unchecked exceptions and subtle Java programming details like Integer overflow.
This upgrade corrected defects in previous versions and prohibited the use of known weak algorithms. Transferring sensitive information over a network can be risky due to the following issues: An attacker who intercepts data may be able to modify it before sending it on to the receiver.
SSL addresses each of these issues. It addresses the first issue by optionally allowing each of two communicating parties to ensure the identity of the other party in a process called authentication. After the parties are authenticated, SSL provides an encrypted connection between the two parties for secure message transmission.
Encrypting the communication between the two parties provides privacy and therefore addresses the second issue. The encryption algorithms used with SSL include a secure hash function, which is similar to a checksum.
The secure hash function addresses the third issue of data integrity. Both authentication and encryption are optional and depend on the negotiated cipher suites between the two entities.
An e-commerce transaction is an obvious example of when to use SSL. In an e-commerce transaction, it would be foolish to assume that you can guarantee the identity of the server with whom you are communicating.
It would be easy enough for someone to create a phony website promising great services if only you enter your credit card number. SSL allows you, the client, to authenticate the identity of the server.
It also allows the server to authenticate the identity of the client, although in Internet transactions, this is seldom done. After the client and the server are comfortable with each other's identity, SSL provides privacy and data integrity through the encryption algorithms that it uses.
This allows sensitive information, such as credit card numbers, to be transmitted securely over the Internet. When the digital equivalent of a signature is associated with a message, the communication can later be proved. SSL alone does not provide nonrepudiation.
SSL uses public-key cryptography to provide authentication, and secret-key cryptography with hash functions to provide for privacy and data integrity. Cryptographic Processes The primary purpose of cryptography is to make it difficult for an unauthorized third party to access and understand private communication between two parties.
It is not always possible to restrict all unauthorized access to data, but private data can be made unintelligible to unauthorized parties through the process of encryption.
Encryption uses complex algorithms to convert the original message cleartext to an encoded message ciphertext. The algorithms used to encrypt and decrypt data that is transferred over a network typically come in two categories: Both secret-key cryptography and public-key cryptography depend on the use of an agreed-upon cryptographic key or pair of keys.
A key is a string of bits that is used by the cryptographic algorithm or algorithms during the process of encrypting and decrypting the data.
A cryptographic key is like a key for a lock; only with the right key can you open the lock. Safely transmitting a key between two communicating parties is not a trivial matter.
A public key certificate enables a party to safely transmit its public key, while providing assurance to the receiver of the authenticity of the public key. See Public Key Certificates. The descriptions of the cryptographic processes in secret-key cryptography and public-key cryptography follow conventions widely used by the security community: The unauthorized third party, also known as the attacker, is named Charlie.
Secret-Key Cryptography With secret-key cryptography, both communicating parties, Alice and Bob, use the same key to encrypt and decrypt the messages.
Before any encrypted data can be sent over the network, both Alice and Bob must have the key and must agree on the cryptographic algorithm that they will use for encryption and decryption One of the major problems with secret-key cryptography is the logistical issue of how to get the key from one party to the other without allowing access to an attacker.C program for addition, subtraction, multiplication, division and modulus of two numbers.
This program performs basic binary arithmetic operation on two integer operands like addition, subtraction, division and modulus and prints result in screen.
Let us use an array of characters (str) to store the string and variables nletter, ndigit, nspace and nother to count the letters, digits, white spaces and other characters, respectively.
Recursion in computer science is a method of solving a problem where the solution depends on solutions to smaller instances of the same problem (as opposed to iteration).
The approach can be applied to many types of problems, and recursion is one of the central ideas of computer science.. The power of recursion evidently lies in the possibility of defining an infinite set of objects by a.
In This Chapter. In this chapter we will take a look at the basic programming terminology and we will write our first C# heartoftexashop.com will familiarize ourselves with programming – what it means and its connection to computers and programming languages.
Java program print prime numbers. Java program to print prime numbers, number of prime numbers required is asked from a user. Remember the smallest prime number is 2.
We are using sqrt method of Math package which find square root of a number. To check if an integer (say n) is prime you can check if it is divisible by any integer from 2 to (n What is a Java program to print the first prime numbers? Update Cancel.
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Animesh Kumar, How do I write a java program that prints out the first n numbers, their squares and their cubes?