Kyzer Software Application Support Engineer Interview Questions and Answers

A table with 3-4 columns is created to store and organize data in a structured manner.

• Columns represent different attributes or properties of the data.

• Each row in the table represents a unique record or entry.

• Columns can have different data types such as text, numbers, dates, etc.

• Primary key column can be used to uniquely identify each record.

• Foreign key columns can establish relationships between tables.

• Example: A tab...read more

To add a column without using create, you can use the ALTER TABLE statement.

• Use the ALTER TABLE statement to add a new column to an existing table

• Specify the table name and the new column name, data type, and any other constraints

• Example: ALTER TABLE table_name ADD column_name data_type;

Tomcat server is a Java-based web server that is used to serve Java Servlets and JSP pages.

• Tomcat is an open-source web server and servlet container

• It is used to deploy Java web applications

• It supports Java Servlet, JavaServer Pages (JSP), Java Expression Language (EL), and WebSocket technologies

• It can be used as a standalone server or integrated with other web servers like Apache

• It provides a web management interface ...read more

Views are virtual tables that are based on the result of a query. They provide a way to simplify complex queries and restrict access to data.

• Views are created by selecting columns from one or more tables and can include joins, filters, and calculations.

• Unlike tables, views do not store data physically, but rather retrieve it dynamically from the underlying tables.

• Views can be used to present a subset of data to users, ...read more

Indices are values that point to specific data within a data structure. They are used to access and manipulate data efficiently.

• Indices are commonly used in arrays to access specific elements.

• They can also be used in databases to improve search performance.

• Indices can be created on columns in a table to speed up queries.

• In programming, indices are often used in loops to iterate over data structures.

• Indices can also be ...read more

Left outer join is used to combine all rows from the left table with matching rows from the right table.

• Use the LEFT JOIN keyword to perform a left outer join

• The syntax is: SELECT column_name(s) FROM table1 LEFT JOIN table2 ON table1.column_name = table2.column_name

• If there is no match in the right table, NULL values are returned

• Example: SELECT customers.name, orders.order_id FROM customers LEFT JOIN orders ON customer...read more

OOP stands for Object-Oriented Programming, a programming paradigm that focuses on objects and their interactions.

• OOP is based on the concept of classes and objects

• It emphasizes encapsulation, inheritance, and polymorphism

• Examples of OOP languages include Java, C++, and Python