Confidence Shipping Interview Questions and Answers

The default variable keyword in JavaScript is 'var'. Strict equality checks both value and type, while loose equality only checks value.

• Default variable keyword in JavaScript is 'var'

• Strict equality (===) checks both value and type

• Loose equality (==) only checks value

SQL constraints are rules that enforce data integrity, joins are used to combine data from multiple tables, indexes improve query performance, views are virtual tables, and having and where clauses filter data differently.

• SQL constraints ensure data integrity by enforcing rules on columns (e.g. NOT NULL, UNIQUE, PRIMARY KEY, FOREIGN KEY).

• Joins are used to combine data from multiple tables based on a related column (e.g. INNER JOIN, LEFT JOIN, RIGHT JOIN).

• Indexes are data stru...read more

MVC is a software architectural pattern used in web development. Boxing and unboxing are operations to convert value types to reference types and vice versa. ADO.NET is a data access technology in .NET framework.

• MVC stands for Model-View-Controller, where Model represents the data, View represents the UI, and Controller handles user input and updates the model.

• Boxing is the process of converting a value type to an object type, while unboxing is the reverse operation.

• ADO.NET i...read more

Mapping is the process of creating visual representations of data on a map.

• Mapping involves collecting geographic data and displaying it on a map

• GIS technology is commonly used for mapping

• Maps can show various types of information such as roads, buildings, and natural features

• Mapping is used in various industries like urban planning, environmental management, and disaster response

PowerBI and Tableau are both popular data visualization tools, but they have some key differences in terms of features and functionality.

• PowerBI is a Microsoft product, while Tableau is developed by Tableau Software.

• PowerBI is more user-friendly and integrates well with other Microsoft products, while Tableau offers more advanced visualization capabilities.

• Tableau has a feature called Calculated Field which allows users to create new fields based on existing data, while Power...read more