PrimEra Medical Technologies Interview Questions and Answers

A View Model in Android is a class that stores and manages UI-related data in a lifecycle-conscious way.

• View Model helps to separate the UI data from the UI controller logic.

• It survives configuration changes and can be shared between fragments or activities.

• Example: ViewModel class in Android Architecture Components.

CSV stands for comma-separated values, VP is validation protocol. 21CFR part 11 and EU annex 11 are regulations for electronic records and signatures in the US and EU. Gamp5 is a guideline for validation of computerized systems in the pharmaceutical industry.

• CSV is a file format used for storing tabular data in plain text, with each line representing a data record and each record separated by commas.

• VP is a validation protocol used to ensure that a system or process meets pre...read more

AIDL and HIDL are communication interfaces used in Android development. Android Boot Up Sequence, Architecture, Components Framework, and Activity Lifecycle are key concepts in Android development.

• AIDL (Android Interface Definition Language) is used for inter-process communication in Android. It allows different applications to communicate with each other.

• HIDL (Hardware Interface Definition Language) is used for communication between Android system services and hardware compo...read more

Pure Components in React JS are components that do not re-render unless their props have changed.

• Pure Components extend React.Component and implement shouldComponentUpdate method for shallow comparison of props and state.

• Pure Components are more efficient than regular components as they prevent unnecessary re-renders.

• Example: class MyComponent extends React.PureComponent { // component code here }

React lifecycle methods include componentDidMount, componentDidUpdate, componentWillUnmount, etc.

• componentDidMount - called after component is rendered for the first time

• componentDidUpdate - called after component's state or props change

• componentWillUnmount - called before component is removed from the DOM

View Model is a design pattern that separates the data presentation logic from the business logic in an application.

• View Model is used to prepare data for display in a user interface.

• It helps in keeping the business logic separate from the UI logic.

• View Model is commonly used in MVVM (Model-View-ViewModel) architecture.

• It can contain data formatting, validation, and other presentation-related logic.

Android Components Framework is a set of building blocks that help developers create Android apps.

• Includes activities, services, broadcast receivers, and content providers

• Activities are UI components, services run in the background, broadcast receivers respond to system-wide broadcast announcements, content providers manage shared set of app data

• Components can be declared in the AndroidManifest.xml file

Room DB is a persistence library that provides an abstraction layer over SQLite to allow for more robust database access in Android applications.

• Room DB simplifies database interactions by providing compile-time verification of SQL queries.

• It consists of three main components: Entity, DAO (Data Access Object), and Database.

• Example: @Entity annotation defines a SQLite table, @Dao annotation defines database operations, and @Database annotation defines the database class.

• Room D...read more