Which of the following Is a Legal Jsp Syntax to Print the Value of I
18. Suppose you need to write a JSP page that adds numbers from one to ten, and then print the output. JSP actions use constructs in XML syntax to control the behavior of the servlet engine. You can insert a file dynamically, reuse JavaBeans components, redirect the user to another page, or generate HTML for the Java plug-in. Because the value of an expression is converted to a string, you can use an expression in a line of text in a JSP file, whether or not it is marked with HTML. Now take a look at the next switch. case block writes slightly differently with out.println() and in Scriptletas − In this chapter, we will discuss syntax in JSP. We will understand the basic use of simple syntax (i.e. elements) involved in JSP development.
JSP supports nine automatically defined variables, also known as implicit objects. These variables are − In this example, we print the username with the expression tag. The index.html file retrieves the user name and sends the request to the welcome.jsp file, which displays the user name. localhost/test.jsp?name=”Johannes”. The test .jsp contains the following code. 12. Is the following statement true or false? If the isThreadSafe attribute of the page directive is false, the generated servlet implements the SingleThreadModel interface. 9. A bean with a property color is loaded with the following instruction 19.
Now consider the same JSP example as the last question. What must be added on the YYY website to print the sum of ten numbers. Select the correct statement 20. JSP pages have access to implicit objects that are automatically exposed. One of these available objects is the request. The request object is an instance of which class? 24. Is the following JSP code legal? Select the correct statement. There is only one syntax for the Action element because it conforms to the XML standard: the code placed in the JSP expression tag is written to the response output stream. Therefore, you do not need to write out.print() to write data. It is mainly used to print the values of variables or methods. 14. Name the default value of the range attribute .
Explanation:When using scriptlets (i.e. code contained in ), the code contained must have legal Java syntax. The first statement must therefore end with a semicolon. The second statement, on the other hand, is a JSP expression. It should therefore not end with a semicolon. The JSP expression language defines the following literals – question:Which of the following is the JSP syntax that is allowed to print the value of i. Choose the correct answer 23. The page directive is used to pass page information to the JSP container. Which of them are the legal syntax of the page directive.
Select the two correct statements A JSP directive affects the forest of the servlet class. It usually has the following form − In this example of a jsp expression tag, we simply display a welcome message. 30. Name the implicit variable that is available for JSP pages and can be used to access all other implicit objects. Used to write template text in pages and JSP documents. This encapsulates the use of server-specific features, such as the more powerful JspWriter. The expression element can contain any expression that is valid according to the Java language specification, but you cannot use a semicolon to end an expression. String – with single and double quotation marks; “escaped as “, ` escaped as ` and as . Declares a tag library with custom actions that appear on the This is the HttpServletRequest object associated with the request.
Sets the attribute of the dynamically defined XML element. The Exception object provides access to exception data through the specified JSP. Single quotes in an attribute that uses single quotes. There are a small number of special constructs that you can use in various cases to insert comments or characters that would otherwise be treated specially. Here is a summary – A JSP expression element contains a scripting language expression that is evaluated, converted to a string, and inserted where the expression appears in the JSP file. A declaration declares one or more variables or methods that you can use later in the Java code in the JSP file. You must declare the variable or method before using it in the JSP file. The JSP comment marks the text or statements that the JSP container should ignore. A JSP comment is useful when you want to hide or “comment” on part of your JSP page.
Action items are essentially predefined functions. The following table lists the available JSP actions. A scriptlet can contain any number of JAVA language statements, variable declarations, or methods or expressions that are valid in the page scripting language. The if. else Block starts as a regular scriptlet, but the scriptlet closes on each line with HTML text contained between the scriptlet tags. 21.JSP pages have access to implicit objects that are automatically exposed. Name the implicit object of type HttpSession. Which statement, if placed at position XXX, can be used to calculate the sum. Choose the correct statement NOTE – Suppose Apache Tomcat is installed in C:apache-tomcat-7.0.2 and your environment is configured according to the environment configuration tutorial. To display the current time, we used the getTime() method of the Calendar class. GetTime() is an instance method of the Calendar class, so we called it after retrieving the instance of the Calendar class via the getInstance() method. Generates browser-specific code that creates an OBJECT or EMBED tag for the Java plug-in.
A small note here – In the actual exam, fewer type questions are filled compared to these questions. In addition, the actual exam questions are likely to be more difficult than these questions. Inserts the property of a JavaBean into the output. 2. A JSP page named test.jsp gets a parameter name in the URL with You can use all Java APIs and building blocks in your JSP programming, including decision statements, loops, etc. 26. A JSP page uses the java.util.ArrayList class multiple times. Instead of referencing the class by its full package name every time, we just want to use ArrayList. Which attribute of the page directive must be specified to achieve this. Select the correct answer. This is simply a synonym and is used to call methods defined by the translated servlet class.
25. A JSP page must generate an XML file. An attribute of the page directive that can be used to specify that the JSP page generates an XML file. In an expression, operators with a higher priority are evaluated first. JSP supports all logical and arithmetic operators supported by Java. The following table lists all operators with the highest priority at the top of the table and operators with the lowest priority at the bottom. We would explain the JSP directive in a separate chapter JSP – Directives Defines page-dependent attributes, such as scripting language, error page, and buffer requirements. You can also use three basic types of loop blocks in Java: for, while, and do. while blocks in your JSP programming. Option A):Option B):Option C):<Option D):Option E): The text, HTML, or JSP elements you write must be outside the scriptlet. Here is the first simple example of JSP – .