Qubit Capital Interview Questions and Answers

Object-oriented programming concepts from class to multi-threading in Android development.

• Class: blueprint for creating objects, encapsulates data and behavior (methods)

• Inheritance: allows a class to inherit properties and methods from another class

• Polymorphism: ability for objects to take on multiple forms

• Abstraction: hiding implementation details and showing only necessary features

• Encapsulation: bundling data and methods that operate on the data into a single unit

• Interfaces...read more

Data query language is used to retrieve data from a database, while data definition language is used to define and modify the structure of a database.

• Data query language (DQL) is used to retrieve data from a database, such as SQL SELECT statement.

• Data definition language (DDL) is used to define and modify the structure of a database, such as SQL CREATE TABLE statement.

• DQL focuses on querying and retrieving data, while DDL focuses on defining and modifying the database schema....read more

Array list implementation involves creating a dynamic list that can grow or shrink in size.

• Use ArrayList class in Java to create an array list of strings.

• ArrayList list = new ArrayList<>();

• Add elements to the list using list.add() method.

• list.add("Apple");

• Access elements using list.get() method.

• String fruit = list.get(0);

• Remove elements using list.remove() method.

• list.remove(0);

Android intent is a messaging object used to request an action from another app component.

• Android intent is used to start an activity, service, or broadcast receiver in Android app development.

• It can also be used to pass data between activities or communicate with other apps.

• There are two types of intents: explicit intents (targeting a specific component) and implicit intents (requesting an action from any app component that can handle it).

SDLC is the Software Development Life Cycle, while STLC is the Software Testing Life Cycle.

• SDLC focuses on the development of software from planning to deployment, while STLC focuses on the testing activities within the SDLC.

• SDLC includes phases like requirements gathering, design, coding, testing, and deployment, while STLC includes phases like test planning, test design, test execution, and test closure.

• SDLC is more comprehensive and covers the entire software development p...read more