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ServiceNow Software Engineer Interview Experience

Software Engineer

ServiceNow
June 11, 2025
15 Questions
Selected

Summary

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The ServiceNow Frontend Software Engineer (IC2) interview process was quite extensive, involving multiple rounds and a mix of technical problem-solving. The first round focused heavily on JavaScript concepts and included questions on output interpretation, event loop mechanics, and basic algorithmic challenges. Subsequent rounds introduced system design discussions, demonstrating a need for both technical proficiency and design thinking. Overall, the interview experience at ServiceNow is rigorous, emphasizing strong coding skills, design principles, and a solid understanding of web technologies.

1

ROUND 1: Technical Discussion & Problem-Solving

#1

JavaScript Output Questions

What will be the output of the following JavaScript questions? Discuss aspects like hoisting, Temporal Dead Zone, and Arrow functions.
javascript
output-based
Medium
#2

Browser Load Sequence

Explain the rendering sequence of an HTML page from start to finish. How is the script tag executed when running?
web-development
browser
Medium
#3

Async vs Defer Attributes

What is the difference between the async and defer attributes in script tags?
javascript
web-development
Easy
#4

Event Loop Explanation

What is the event loop in JavaScript? How does it relate to the execution of asynchronous code?
javascript
asynchronous-programming
Medium
#5

Microtask vs Macrotask

Differentiate between microtasks and macrotasks in JavaScript. Provide examples of each.
javascript
asynchronous-programming
Medium
#6

Promise Output Sequencing

What would be the output of a sequence of operations involving promises? Discuss how microtasks fit into this scenario.
javascript
promises
Medium
#7

Debounce and Currying Polyfills

Implement polyfills for both debounce and currying functions in JavaScript.
javascript
Medium
#8

Two-Way Data Binding in Angular

What is two-way data binding in Angular? How is it implemented?
angular
Medium
#9

Manipulating JSON Objects

Given a problem statement regarding the manipulation of a JSON object, discuss how to achieve the desired output.
javascript
json
Medium
2

ROUND 2: Technical Discussion & Problem-Solving

#1

Asynchronous Loop Output

What will be the output of the following code? Analyze the implications of the setTimeout function on the variable 'i'.
javascript
output-based
Medium
javascript
function foo() { for (var i = 0; i < 10; i++) setTimeout(() => console.log(i), 1000); } foo();
#2

Debounce Function Implementation

Implement a function to debounce another function by creating a polyfill.
javascript
coding
Medium
#3

Currying Function Implementation

Implement a currying function which allows you to transform a function into a series of functions each taking a single argument.
javascript
coding
Medium
#4

Maximum Size Square Sub-Matrix

Given a binary matrix, find the maximum size square sub-matrix that contains all 1s. For example, given the binary matrix: 0 1 1 0 1 1 1 0 1 0 0 1 1 1 0 1 1 1 1 0 1 1 1 1 1 0 0 0 0 0 what would be the output?
dynamic-programming
matrix
Hard
#5

Distinct Ways to Climb Stairs

You are climbing a staircase. It takes n steps to reach the top, and you can take either 1 or 2 steps at a time. In how many distinct ways can you climb to the top?
dynamic-programming
stairs
Medium
3

System design

#1

HLD and LLD for Autocomplete Component

Provide a High-Level Design (HLD) and Low-Level Design (LLD) for an Autocomplete component. Ensure the solution is scalable and modular, considering key system design features. Respond to functional, non-functional requirements, and data flow.
system-design
components
Medium
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r

ritwik chakraborty

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