10+ Metafic Interview Questions and Answers

GIS stands for Geographic Information System, which is a system designed to capture, store, manipulate, analyze, manage, and present spatial or geographic data.

• GIS is used to analyze and visualize spatial data, such as maps, satellite images, and aerial photographs.

• Coordinates are sets of numbers used to represent a specific location on the Earth's surface.

• Coordinates are typically expressed in latitude and longitude, with latitude representing north-south position and longit...read more

MVC stands for Model-View-Controller. It is a software design pattern that separates an application into three interconnected components.

• Model represents the data and business logic of the application

• View is responsible for rendering the user interface

• Controller handles user input and updates the model and view accordingly

• MVC helps developers to write clean, modular and maintainable code

• It also enables parallel development of different components

• MVC is widely used in web deve...read more

The four pillars of OOP are Abstraction, Encapsulation, Inheritance, and Polymorphism.

• Abstraction: Hiding implementation details and showing only necessary information.

• Encapsulation: Binding data and functions that manipulate it together.

• Inheritance: Creating new classes from existing ones, inheriting their properties and methods.

• Polymorphism: Ability of objects to take on multiple forms or behaviors.

The angle between the hour hand and minute hand of a clock at a particular time.

• The angle between the hour hand and minute hand can be calculated using the formula: angle = 30 * (hour % 12) + 0.5 * minutes

• If the angle is greater than 180 degrees, subtract it from 360 to get the smaller angle

• For example, at 3:15, the hour hand is at 97.5 degrees and the minute hand is at 90 degrees, so the angle between them is 7.5 degrees

Model Builder is a visual programming tool in GIS software that allows users to create, edit, and manage geoprocessing models.

• Model Builder is used in GIS software like ArcGIS to automate geoprocessing tasks.

• It allows users to visually create workflows by connecting geoprocessing tools and data inputs/outputs.

• Users can save and share models for repeated use or to collaborate with others.

• Model Builder can help streamline complex geoprocessing tasks and improve efficiency in GI...read more

GIS stands for Geographic Information System, a system designed to capture, store, manipulate, analyze, manage, and present spatial or geographic data.

• GIS integrates spatial data (maps) with data attributes (information)

• Used for mapping, analyzing, and visualizing data in a geographic context

• Commonly used in urban planning, environmental resource management, and emergency response

• Examples: Google Maps, ArcGIS, QGIS

Topology is the spatial relationships and connectivity between geographic features in a GIS dataset.

• Topology defines how features are connected and related to each other

• It ensures data integrity by enforcing rules such as no gaps or overlaps between features

• Examples include defining adjacency between polygons, connectivity between lines, and relationships between points

Android location can be detected using LocationManager and LocationListener classes.

• Create an instance of LocationManager class

• Check if location services are enabled

• Request location updates using LocationListener class

• Implement onLocationChanged() method to get location updates

• Use getLastKnownLocation() method to get last known location

• Add necessary permissions in AndroidManifest.xml file

To capture rooftop, use drones for aerial photography and mapping.

• Use drones equipped with high-resolution cameras to capture detailed images of the rooftop

• Ensure the drone flies at an appropriate altitude to capture the entire rooftop area

• Consider using photogrammetry software to create 3D models of the rooftop based on the images captured

• Plan the flight path of the drone to cover the entire rooftop efficiently

• Review and analyze the captured images to identify any issues or ...read more

ArcMap is a geographic information system software used for creating, analyzing, and managing geographic data.

• ArcMap is part of the ArcGIS suite of software developed by Esri.

• It allows users to create maps, perform spatial analysis, and manage geographic data.

• Users can add layers of data, perform geoprocessing tasks, and create layouts for printing or sharing.

• ArcMap uses a project-based approach, where users can save their work in a .mxd file.

Maps can be worked on using Google Maps API or other third-party libraries.

• Choose a map provider and obtain an API key

• Integrate the API into your app

• Add markers, polylines, and polygons to the map

• Implement location tracking and geocoding

• Customize the map's appearance and behavior