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Who is responsible to create object of servlet?
4) Who is responsible to create the object of servlet? The web container or servlet container.
What is servlet short answer?
Ans: Servlet is a Java tool that is used to create Java Web Applications. It is located at the server-side and helps to generate dynamic web pages, it acts as a mediator between the incoming HTTP request from the browser and the database. Servlet is robust and called as a server-side programming language.
In which mode servlets can be used?
The modes of Servlet can be used are: Support HTTP protocol. Used for CGI based application. Dynamic generation of Servlet….The important functions of filters are:
- Logging and auditing.
- Security check.
- Response compression.
- Data compression.
- Modifying the response.
Can we get PrintWriter and ServletOutputStream both in a servlet?
Can we get PrintWriter and ServletOutputStream both in a servlet? We can’t get instances of both PrintWriter and ServletOutputStream in a single servlet method, if we invoke both the methods; getWriter() and getOutputStream() on response; we will get java.
What are the two main types of servlet?
There are two main servlet types, generic and HTTP:
- Generic servlets. Extend javax. servlet. GenericServlet. Are protocol independent.
- HTTP servlets. Extend javax. servlet. HttpServlet. Have built-in HTTP protocol support and are more useful in a Sun Java System Web Server environment.
What is life cycle of servlet?
A servlet life cycle can be defined as the entire process from its creation till the destruction. The following are the paths followed by a servlet. The servlet is initialized by calling the init() method. The servlet calls service() method to process a client’s request.
Why servlets are used in Java?
A servlet is a Java programming language class that is used to extend the capabilities of servers that host applications accessed by means of a request-response programming model. Although servlets can respond to any type of request, they are commonly used to extend the applications hosted by web servers.
What is Init method in servlet?
Called by the servlet container to indicate to a servlet that the servlet is being placed into service. The servlet container calls the init method exactly once after instantiating the servlet. The init method must complete successfully before the servlet can receive any requests.
When destroy () method of a servlet is called?
A – The destroy() method is called only once at the end of the life cycle of a servlet.
What does start () do in java?
The start() method of thread class is used to begin the execution of thread. The result of this method is two threads that are running concurrently: the current thread (which returns from the call to the start method) and the other thread (which executes its run method).
What are some good interview questions for Java JDBC?
Let’s start learning Java JDBC interview questions and prepare for Java interviews. All the best for your future and happy learning. How do you understand null in databases? Aggregate functions, how they work with null. Do not forget about group by and having How is it better to add a large number of records to a table?
How can I test my Java JDBC knowledge?
Test your Java JDBC knowledge by answering these tricky interview questions on JDBC . Let’s start learning Java JDBC interview questions and prepare for Java interviews. All the best for your future and happy learning. How do you understand null in databases?
What is JDBC and how many JDBC drivers are there?
JDBC stands for Java Database Connectivity. JDBC is a Java API that communicates with the database and execute SQLquery. 2) What is a JDBC driver and how many JDBC drivers are available? JDBC driver contains classes and interfaces that help Java application and database. There are 4 types of JDBC drivers.
What is the use of JDBC in Java?
JDBC is a Java API that is used to connect and execute the query to the database. JDBC API uses JDBC drivers to connect to the database. JDBC API can be used to access tabular data stored into any relational database. More details.