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 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

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

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

JS code to convert Roman to decimal number

• Create a map of Roman numerals to their decimal values

• Loop through the Roman numeral string from right to left

• If the current numeral is less than the previous numeral, subtract it from the total

• Otherwise, add it to the total

• Return the total

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

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.

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

Polyfill for promise.all() is a code that adds support for promise.all() in older browsers.

• Polyfill can be implemented using a combination of Promise and Array.prototype.reduce()

• The polyfill should return a promise that resolves when all promises in the input array have resolved

• If any promise in the input array rejects, the polyfill should reject with the reason of the first promise that rejected

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

Jump Game problem involves determining if you can reach the last index of an array based on jump lengths.

• The input is an array of non-negative integers, where each element represents the maximum jump length from that position.

• You start at the first index (0) and need to determine if you can reach the last index (length - 1).

• Use a greedy approach: keep track of the farthest index you can reach as you iterate through the array.

• If at any point your current index exceeds the fart...read more