10+ Front Office and Accounts Executive Interview Questions and Answers

Flatten a nested array into a single-level array.

• Use recursion to iterate through each element of the array.

• If the element is an array, call the function recursively.

• If the element is not an array, add it to the result array.

Code to convert account number to asterisk

• Create a function that takes in an account number as input

• Use string slicing to replace characters with asterisks

• Return the modified account number as output

Code to output 72 by calling add(5,3).mul(9).calc()

• Define a class with add, mul, and calc methods

• add method should add two numbers and return the class instance

• mul method should multiply the result with a number and return the class instance

• calc method should return the final result

• Call the methods in the given order to get the output 72

Creating a custom dropdown component in React using HTML Select tag.

• Create a new component and import React

• Use the HTML Select tag to create the dropdown

• Use the map function to loop through the array of strings and create the options

• Add an onChange event to handle the selection and update the state

• Pass the array of strings as props to the component

useMemo and useCallback are React hooks used for performance optimization by memoizing values and functions respectively.

• useMemo is used to memoize the result of a function so that it is only recomputed when its dependencies change.

• useCallback is used to memoize a function instance so that it is not recreated on every render.

• useMemo is ideal for optimizing expensive calculations or complex operations that do not depend on props or state changes.

• useCallback is ideal for optimi...read more

Polyfill for flat function

• Create a function that takes an array and a depth as arguments

• Use recursion to flatten the array to the specified depth

• If depth is not specified, flatten the array completely

• Return the flattened array

Implement a deep clone functionality in JavaScript for deeply nested objects.

• Use JSON.parse(JSON.stringify(obj)) for simple objects.

• For objects with functions or non-serializable values, use a custom recursive function.

• Handle circular references by keeping track of visited objects.

React life cycle methods and their corresponding implementation using React hooks.

• ComponentDidMount - useEffect hook with empty dependency array

• ComponentDidUpdate - useEffect hook with specific dependency array

• ComponentWillUnmount - useEffect hook with cleanup function

• ShouldComponentUpdate - useMemo hook for memoization

• getDerivedStateFromProps - useState hook for managing component state

Creating a Todo list component in React

• Create a new React component for the Todo list

• Use state to store the list of tasks

• Render the list of tasks using map()

• Add a form to add new tasks to the list

• Add a button to delete tasks from the list

Create a counter and a to do app on codesandbox platform

• Create a counter component with buttons to increment and decrement the count

• Implement a to do app with input field to add tasks and a list to display them

• Use React or any other front-end framework/library for building the apps

Build a file structure

• Use an array of strings to represent the file structure

• Each string in the array represents a file or directory

• Use a specific format to differentiate between files and directories

• Include the parent-child relationship between directories

Machine learning algorithms are used to analyze data, make predictions, and automate decision-making processes.

• Machine learning algorithms can be categorized into supervised, unsupervised, and reinforcement learning.

• Examples of machine learning algorithms include linear regression, decision trees, support vector machines, and neural networks.

• These algorithms require training data to learn patterns and make predictions.

• Feature engineering is an important step in preparing data...read more

Design a yin yang using css

• Create a circle using border-radius property

• Use background-color to fill the circle with black and white

• Create two smaller circles inside the main circle using absolute positioning

• Use transform property to rotate the smaller circles

• Add box-shadow to create the 3D effect