VOLTECH O AND M SERVICES Interview Questions and Answers

Redux flow involves dispatching actions, updating the store, and triggering re-rendering of components.

• Actions are dispatched from components

• Reducers update the store based on the action

• Store notifies subscribed components of state change

• Components re-render with updated state

Hooks are functions that let you use state and other React features without writing a class.

• Hooks are introduced in React 16.8

• Rules of hooks are: Only call hooks at the top level, Only call hooks from React functions, Only call hooks from custom hooks

• Examples of hooks are useState, useEffect, useContext, useReducer, useMemo, useCallback, useRef

List comprehension is a concise way to create lists in Python. Constructor is a special method used to initialize objects. Schemas are blueprints for organizing data.

• List comprehension is a shorthand way to create lists in Python

• It is a concise way to write a for loop and append to a list in a single line

• Example: squares = [x**2 for x in range(10)]

• Constructor is a special method used to initialize objects

• It is called when an object is created from a class

• Example: class Person...read more

DBMS stands for Database Management System. SQL is a programming language used to manage and manipulate data in DBMS.

• DBMS is a software system that allows users to create, manage, and manipulate databases.

• SQL (Structured Query Language) is a programming language used to communicate with DBMS and perform operations on data.

• DBMS and SQL are used in various industries such as finance, healthcare, and e-commerce.

• Examples of popular DBMS include Oracle, MySQL, and Microsoft SQL Se...read more

Display flex is a CSS property that allows flexible layout of elements within a container.

• It enables responsive design by automatically adjusting the size and position of elements

• It allows for easy alignment and distribution of elements along the main and cross axis

• It can be used to create complex layouts with minimal code

• It supports both horizontal and vertical layouts

• Example: display: flex; justify-content: center; align-items: center;