41.Say True or False. Give explanation if False. INSERT statement does not allow copying rows from one table to another. False. INSERT statement allows to add rows to a table …
31.What do you understand by a subquery? When is it used? A subquery is a SELECT statement embedded in a clause of another SELECT statement. It is used when the …
21.What is the difference between cross joins and natural joins? The cross join produces the cross product or Cartesian product of two tables. The natural join is based on all …
11.What is the default ordering of data using the ORDER BY clause? How could it be changed? The default sorting order is ascending. It can be changed using the DESC …
1.What is the difference between SQL and MySQL or SQL Server? SQL or Structured Query Language is a language; language that communicates with a relational database thus providing ways of …
41.What is the purpose of @Result annotation? The @result annotations have the name that correspond to the outcome of the execute method. They also contain a location as to which …
31.What should be the name of xml file used for validation in struts? The xml file needs to be named ‘[action-class]’-validation.xml.
21.What is Value Stack? The value stack is a set of several objects which keeps the following objects in the provided order − Temporary Objects − There are various temporary …
11.What is the purpose of action-mappings tag in struct-config.xml? This is where you declare form handlers and they are also known as action mappings.
1.What is Struts2? Struts2 is popular and mature web application framework based on the MVC design pattern. Struts2 is not just the next version of Struts 1, but it is …
