java scenario based interview questions

logic to tell the browser to request the address again. Generally, the browser will re-request the address with all the parameters just requested, so the session and request parameters can be obtained. 23. What is the difference between EJB and Java Bean? Java Bean is a reusable component and there is no strict specification for Java Bean. Theoretically, any

This is the topic discussed during the last interview and is recorded. Spring Why use spring? What are the benefits of IOC? What are the benefits of scalability? How to instantiate a bean? What is the difference between applicationcontext and beanfactory? How can I read external files through spring? Can bean IDS be repeated in the spring configuration file? What is automatic assembly and type check in spring? Can applicationco

1. What is Java ee?A: Java EE is a multi-layer (Multi-diered), distributed (distributed), and component-based enterprise-level application model (enterpriese application model) proposed by Sun ). In such an application system, different components can be divided by function. These components can be located on different computers and at the corresponding level (Ti

and attribute value), and information about the server (by passing a ServletContext object)1, with 1-5 working experience, in the face of the current popular technology do not know where to start, the need to break through the technical bottlenecks can add group.2, in the company for a long time, live very comfortable, but job-hopping when the interview hit the Wall. Need to study in a short time, job-hopping to get high salaries can add group.3, if

1.JavaThe simple and application of the exception handling mechanism in. WhenJavaProgramWhen Java's Semantic Rules are violated, the Java Virtual Machine will indicate an error as an exception. There are two types of violation of Semantic Rules. One is the built-in semantics of the Java class library. For example, if the array subscript is out of the range, indexoutofboundsexception is triggered. When a n

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executing the Wait,sleep,join method will throw interruptedexception, if the normal state, we can through isinterrupted () =true, To stop the thread from using the return method.(vii) Start and run methods for threadsNote that for a thread to run, only the Start method is executed, this method is the native method, the Run method is where we define the task, and a separate call to the Run method is the same as invoking the normal method. The Start method can only be called once, and more than o

(intx = 0; x ) { - //Invoke function - intnum =getrandom (start, end); - //Output Results - System.out.println (num); in } - } to + /* - * Write a function two explicit: return value type: int argument list: int Start,int end the */ * Public Static intGetrandom (intStartintend) { $ //think back to the random numbers we talked about between 1-100.Panax Notoginseng //int number = (int) (Math.random () * +) + 1;//(int) (Math.r

. 28th, Programming question: Calculate 2 times 8 in the most efficient way? Programmers with a C background are particularly interested in asking such questions. 2 29th, two object values are the same (x.equals (y) = = true), but can have different hash code, this sentence is correct? No, there's the same hash code. 30th, when an object is passed as a parameter to a method, this method can change the property of the object and return the result

encryption mode. (1) Symmetric and asymmetric, sequential: transmission encryption, data storage encryption, data integrity type identification, Key management; 3. Ask the hasshmap underlying data structure, arraylist-linklist difference and why there is such a difference; array comparison method; difference between basic type and reference data type; the difference between the interface and the abstract class; (1) HashMap is a line program that is not secure, not synchronized. HashMap allows y

I. Application of the factory model in development Interview Questions:Write a simple calculator. Code implementation: Abstract An operation class: Package COM. qianyan. calcuator; public abstract class operation {// number one private double num1; // number two private double num2; Public double getnum1 () {return num1;} public void setnum1 (double num1) {This. num1 = num1;} public double getnum2 () {return num2;} public void setnum2 (double num2)

only be performed through the defined interface. Object-oriented computing begins with the basic concept that the real world can be depicted as a series of completely autonomous and encapsulated objects that access other objects through a protected interface.4. Polymorphism:Polymorphism allows different types of objects to respond to the same message. Polymorphism includes parameterized polymorphism and inclusion polymorphism. Polymorphism language is flexible, abstract, behavior sharing, codeB

Website access?Cache Strategy 14. What MVC Framework technologies can be used in Java? What are their features and applicable environments?Struts, webwork, spring, JSF... 15. What are the advantages and disadvantages of MVC and what are their applicability?The MVC development mode separates the data access layer and data presentation layer, and enables developers to develop a scalable and scalable controller to maintain the entire process. 16.

) 71. What are the similarities and differences between synchronized and java. util. concurrent. locks. Lock?The main point is that Lock can complete all functions implemented by synchronized. Major difference: Lock has more precise thread semantics and better performance than synchronized. Synchronized Automatically releases the Lock, which must be manually released by the programmer and must be released in the finally clause. 72. EJB roles and thre

difference between the 5.sendRedirect () and Forward () methods?The Sendredirect () method creates a new request, and the forward () method simply forwards the request to a new target. After redirection (redirect), objects that were within the scope of the previous request are invalidated because a new request is generated, and after forwarding (forwarding), objects within the scope range of the previous request can be accessed. Sendredirect () is generally considered to be slower than forward