Workday Front end Developer Interview Questions and Answers

Q1. React js basic questions
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Q1. They asked about current project.
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Q2. They have given some problem to write javascript code.
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Round duration - 60 Minutes
Round difficulty - Medium

This round consisted of some standard questions related to HTML , CSS , JS and basic Frontend develeoper practices .

Q1. What are the features of HTML5?
Ans. 
HTML5 is the latest version of the HTML standard with new features for web development.
• Support for multimedia elements like <video> and <audio>

• Canvas and SVG for graphics and animations

• Improved form controls and validation

• Offline storage capabilities with Local Storage and IndexedDB

• Geolocation API for location-based services
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Q2. Can you explain the CSS Box Model?
Ans. 
The CSS Box Model is a fundamental concept in CSS that defines the layout and spacing of elements on a webpage.
• The Box Model consists of content, padding, border, and margin.

• Content: The actual content of the box, such as text or images.

• Padding: Space between the content and the border.

• Border: The border surrounding the padding and content.

• Margin: Space outside the border, separating the element from other elements.

• Exa...read more
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Q3. What is prototype chaining in JavaScript?
Ans. 
Prototype chaining in JavaScript is the mechanism by which objects inherit properties and methods from other objects.
• In JavaScript, each object has a prototype property, which points to another object. When a property or method is accessed on an object, JavaScript will look for it in the object itself first, and then in its prototype chain.

• If the property or method is not found in the object, JavaScript will continue t...read more
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Q4. What are media elements in HTML?
Ans. 
Media elements in HTML are used to embed audio and video content on a webpage.
• Media elements include <audio> and <video> tags in HTML.

• They allow for the playback of audio and video files directly on a webpage.

• Attributes like src, controls, autoplay, and loop can be used to customize the behavior of media elements.

• Example: <video src='video.mp4' controls></video>
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Round duration - 70 Minutes
Round difficulty - Medium

This was a preety intense round revolving mainly around the core concepts of JavaScript and React . I was confident about my skills in JavaScript and React as I already had some projects in JS and React and I also completed the Guided Path of JS and React in CodeStudio which boosted my preparation and helped me crack these Frontend Interviews.

Q1. 
Swap Two Numbers Problem Statement
Given two integers a and b, your task is to swap these numbers and output the swapped values.
Input:
The first line contains a single integer 't', representing the num...read more
Ans. 
Swap two numbers 'a' and 'b' and output the swapped values.
• Create a temporary variable to store one of the numbers before swapping

• Assign the value of 'a' to 'b' and the temporary variable to 'a'

• Output the swapped values as 'b' followed by 'a'
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Q2. 
Sort Array Problem Statement
Given an array consisting of 'N' positive integers where each integer is either 0, 1, or 2, your task is to sort the given array in non-decreasing order.
Input:
Each input st...read more
Ans. 
Sort an array of 0s, 1s, and 2s in non-decreasing order.
• Use a counting sort algorithm to count the occurrences of 0s, 1s, and 2s in the array.

• Then reconstruct the array by placing the counted elements in order.

• Time complexity of the counting sort algorithm is O(N).
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Q3. Can you explain promises and their three states?
Ans. 
Promises are objects representing the eventual completion or failure of an asynchronous operation.
• Promises have three states: pending, fulfilled, and rejected.

• Pending: initial state, neither fulfilled nor rejected.

• Fulfilled: operation completed successfully.

• Rejected: operation failed.

• Promises can be chained using .then() to handle success and failure.

• Example: const promise = new Promise((resolve, reject) => { ... })
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Q4. What are callbacks in JavaScript?
Ans. 
Callbacks in JavaScript are functions passed as arguments to other functions, to be executed later.
• Callbacks are commonly used in asynchronous operations, such as event handling or AJAX requests.

• They allow for more flexible and dynamic programming, by defining behavior that should happen after a certain event or task is completed.

• Example: setTimeout function in JavaScript takes a callback function as an argument to be
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Q5. What is the Same-origin policy?
Ans. 
Same-origin policy is a security measure in web browsers that restricts how a document or script loaded from one origin can interact with a resource from another origin.
• It prevents a web page from making requests to a different domain than the one it was loaded from.

• It helps protect user data and prevent malicious attacks like cross-site scripting (XSS).

• Cross-origin resource sharing (CORS) headers can be used to relax
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Q6. Can you explain the lifecycle of components in React?
Ans. 
Components in React go through various stages like mounting, updating, and unmounting.
• Components are created and inserted into the DOM during the mounting phase.

• During the updating phase, components can re-render due to changes in props or state.

• Components are removed from the DOM during the unmounting phase.

• Lifecycle methods like componentDidMount, componentDidUpdate, and componentWillUnmount are used to perform actio
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Round duration - 30 Minutes
Round difficulty - Easy

This was a typical HR round with some standard Behavioral questions like my interests, weaknesses, strengths, family background, are you willing to relocate or travel , why Amdocs, CEO of Amdocs etc.

Q1. Why do you want to work at Amdocs?
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Round duration - 45 minutes
Round difficulty - Medium

Technical Interview round with questions on DSA.

Q1. 
Reverse Words in a String: Problem Statement
You are given a string of length N. Your task is to reverse the string word by word. The input may contain multiple spaces between words and may have leading o...read more
Ans. 
Reverse words in a string while handling leading, trailing, and multiple spaces.
• Split the input string by spaces to get individual words

• Reverse the order of the words

• Join the reversed words with a single space in between

• Handle leading, trailing, and multiple spaces appropriately
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Q2. 
Reverse a Stack Using Recursion
You are given a stack of integers. Your task is to reverse the stack using recursion without using any extra space other than the internal stack space used due to recursion...read more
Ans. 
Reverse a stack using recursion without using any extra space other than the internal stack space.
• Use recursion to pop all elements from the original stack and store them in function call stack.

• Once the stack is empty, push the elements back in reverse order.

• Base case of recursion should be when the original stack is empty.
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Round duration - 45 minutes
Round difficulty - Medium

Technical Interview round with questions on DSA.

Q1. 
Convert a Binary Tree to its Mirror Tree
Given a binary tree, convert this binary tree into its mirror tree. A binary tree is a tree in which each parent node has at most two children. The mirror of a bin...read more
Ans. 
Convert a binary tree to its mirror tree by interchanging left and right children of all non-leaf nodes.
• Traverse the binary tree in a recursive manner.

• Swap the left and right children of each non-leaf node.

• Continue this process until all nodes have been processed.
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Q2. 
Remove Nth Node from End of Linked List
You are given a singly linked list with 'N' nodes, each containing integer data, and an integer 'K'. Your goal is to remove the 'K'th node counting from the end of ...read more
Ans. 
Remove the Kth node from the end of a singly linked list.
• Use two pointers approach to find the Kth node from the end.

• Handle edge cases like removing the head node or removing the last node.

• Update the pointers to remove the Kth node and reconnect the list.
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Round duration - 30 minutes
Round difficulty - Easy

Typical Managerial round.

Round duration - 60 minutes
Round difficulty - Easy

Technical Interview round with questions based on DSA, OOPS and puzzles.

Q1. 
Reverse Linked List Problem Statement
Given a Singly Linked List of integers, your task is to reverse the Linked List by altering the links between the nodes.
Input:
The first line of input is an intege...read more
Ans. 
Reverse a singly linked list by altering the links between nodes.
• Iterate through the linked list and reverse the links between nodes

• Use three pointers to keep track of the current, previous, and next nodes

• Update the links between nodes until the end of the list is reached
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Q2. 
Reverse Number Problem Statement
Ninja is exploring new challenges and desires to reverse a given number. Your task is to assist Ninja in reversing the number provided.
Note:
If a number has trailing ze...read more
Ans. 
Implement a function to reverse a given number, omitting trailing zeros.
• Create a function that takes an integer as input and reverses it while omitting trailing zeros

• Use modulo and division operations to extract digits and reverse the number

• Handle cases where the reversed number has leading zeros by omitting them

• Ensure the reversed number is within the constraints specified
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Q3. 
Reverse the String Problem Statement
You are given a string STR which contains alphabets, numbers, and special characters. Your task is to reverse the string.
Example:
Input:
STR = "abcde"
Output:
"e...read more
Ans. 
Reverse a given string containing alphabets, numbers, and special characters.
• Iterate through the string from end to start and append each character to a new string.

• Use built-in functions like reverse() or slicing to reverse the string.

• Handle special characters and numbers while reversing the string.

• Ensure to consider the constraints provided in the problem statement.
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Q4. What is overloading in the context of Object-Oriented Programming (OOP)?
Ans. 
Overloading in OOP is the ability to define multiple methods with the same name but different parameters.
• Overloading allows multiple methods with the same name but different parameters to coexist in a class.

• The compiler determines which method to call based on the number and type of arguments passed.

• Example: having multiple constructors in a class with different parameter lists.
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Round duration - 60 minutes
Round difficulty - Medium

Technical round with question based on Web Dev, Cloud Computing, Networking etc.

Q1. What is TELNET?
Ans. 
TELNET is a network protocol used to establish a connection with a remote computer over a network.
• TELNET stands for Telecommunication Network.

• It allows a user to log in to a remote computer and execute commands as if they were directly connected to that computer.

• TELNET operates on port 23.

• It is not secure as the data is transmitted in plain text.

• SSH (Secure Shell) is a more secure alternative to TELNET.
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Q2. What is the difference between TELNET and SSH?
Ans. 
TELNET is insecure, while SSH is secure for remote access to servers.
• TELNET sends data in plain text, while SSH encrypts data for secure communication

• SSH uses public-key cryptography for authentication, TELNET does not

• SSH provides secure remote access to servers, TELNET does not prioritize security

• TELNET operates on port 23, while SSH operates on port 22
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Q3. 
Problem: Sort an Array of 0s, 1s, and 2s
Given an array/list ARR consisting of integers where each element is either 0, 1, or 2, your task is to sort this array in increasing order.
Input:
The input sta...read more
Ans. 
Sort an array of 0s, 1s, and 2s in increasing order.
• Use a three-pointer approach to partition the array into sections of 0s, 1s, and 2s.

• Iterate through the array and swap elements based on their values.

• Time complexity should be O(n) to meet the constraints.
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Q4. What is a hypervisor?
Ans. 
A hypervisor is a software that creates and runs virtual machines on a physical host machine.
• Hypervisors allow multiple operating systems to run on a single physical machine

• They provide isolation between virtual machines

• Examples include VMware ESXi, Microsoft Hyper-V, and KVM
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Q5. Can you explain cloud computing in layman’s terms?
Ans. 
Cloud computing is like renting a computer over the internet instead of owning one.
• Cloud computing allows users to access and store data and applications over the internet instead of on their own physical computer.

• It offers scalability, flexibility, and cost-effectiveness as users can easily adjust their storage and computing needs.

• Examples include services like Amazon Web Services (AWS), Microsoft Azure, and Google Cl
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Q6. What are the stages in the Software Development Life Cycle?
Ans. 
The stages in the Software Development Life Cycle include planning, design, development, testing, deployment, and maintenance.
• 1. Planning: Define project scope, requirements, and timelines.

• 2. Design: Create architecture, UI/UX, and database design.

• 3. Development: Write code based on design specifications.

• 4. Testing: Verify functionality, performance, and security.

• 5. Deployment: Release the software to users or clients.

• ...read more
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Round duration - 60 minutes
Round difficulty - Medium

Technical Interview round with questions based on DSA and OOPS. A detailed discussion on my projects was also carried out.

Q1. 
Common Elements in Three Sorted Arrays
Given three sorted arrays A, B, and C of lengths N, M, and K respectively, your task is to find all elements that are present in all three arrays.
Input:
The first...read more
Ans. 
Find common elements in three sorted arrays and output them in order.
• Iterate through all three arrays simultaneously using three pointers.

• Compare elements at pointers and move pointers accordingly.

• If elements are equal, add to result and move all pointers forward.

• If elements are not equal, move pointer of smallest element forward.
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Q2. What is a volatile variable?
Ans. 
A volatile variable is a variable that can be modified by multiple threads simultaneously.
• Volatile variables are used in multithreading to ensure visibility of changes made by one thread to other threads.

• They are not cached in thread's local memory, but always read from main memory.

• They are typically used for flags or status variables that are accessed by multiple threads.

• Example: 'volatile boolean flag = true;'
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Q3. Can you explain the concept of multithreading in Java?
Ans. 
Multithreading in Java allows multiple threads to execute concurrently, improving performance and responsiveness.
• Multithreading allows multiple threads to run concurrently within a single process.

• Threads share the same memory space, allowing for efficient communication and data sharing.

• Java provides built-in support for multithreading through the Thread class and Runnable interface.

• Example: Creating a new thread using ...read more
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Round duration - 30 minutes
Round difficulty - Easy

HR round with typical behavioral problems.