Usha Fire Safety Equipments Interview Questions and Answers

Constructor creates and initializes an object. Virtual function allows overriding of base class function. Reference variable is an alias to an object.

• Constructor is a special member function with the same name as the class. It is used to create and initialize objects.

• Virtual function is a function in base class that can be overridden in derived class. It allows polymorphism.

• Reference variable is an alias to an object. It is declared using '&' symbol and can be used to modify ...read more

DEM stands for Digital Elevation Model, DSM stands for Digital Surface Model, and DTM stands for Digital Terrain Model.

• DEM represents the bare earth surface without any objects like buildings or vegetation.

• DSM includes all objects on the earth's surface such as buildings and trees.

• DTM is a representation of the terrain surface without any objects, including both natural and man-made features.

Software Development Life Cycle (SDLC) includes Waterfall, Agile, Iterative, Spiral, V-Model, Big Bang, etc.

• Waterfall: Sequential approach with distinct phases

• Agile: Iterative and incremental development

• Iterative: Repeating cycles of development

• Spiral: Risk-driven approach with multiple iterations

• V-Model: Corresponding testing phase for each development phase

• Big Bang: All modules developed simultaneously

Design patterns are reusable solutions to common software design problems.

• Design patterns provide proven solutions to recurring design problems in software development.

• They help in creating flexible, maintainable, and scalable software.

• Design patterns can be categorized into three types: creational, structural, and behavioral.

• Examples of design patterns include Singleton, Observer, Factory Method, and Strategy.

• They promote code reusability, modularity, and separation of conce...read more

JDBC steps involve loading the driver, establishing a connection, creating a statement, executing the query, and processing the results.

• Load the JDBC driver using Class.forName() method

• Establish a connection to the database using DriverManager.getConnection() method

• Create a statement object using the connection.createStatement() method

• Execute the query using statement.executeQuery() method

• Process the results by iterating through the ResultSet object

AutoCAD shortcuts are key combinations that help users perform tasks more efficiently.

• Shortcuts can be used for common commands like copy, paste, undo, etc.

• They can also be used for more complex tasks like creating layers, dimensions, etc.

• Examples of shortcuts include Ctrl+C for copy, Ctrl+V for paste, Ctrl+Z for undo, etc.