ServiceNow interview questions

Received an offer5 rounds

1. 1
   Online testOnline assessment

   A single HackerRank-style coding problem framed as longest increasing subsequence; after passing HR reaches out.

   Covered · Dynamic programming

2. 2
   Technical 1Technical

   Two coding problems on shared screen: minimum number of railway platforms, and largest sum contiguous subarray; interviewer probes logic and complexity.

   Covered · Arrays & strings, Greedy

3. 3
   Technical 2Technical

   Project deep dive then two coding problems: parent-child job runtime aggregation over a tree, and infix-to-postfix conversion.

   Covered · Trees, Stacks

4. 4
   Technical 3Technical

   Walk through GitHub projects and named design patterns actually used; discuss five to six patterns in depth.

   Covered · Design patterns, Past projects

5. 5
   ManagerHiring manager

   Long discussion on projects and expectations plus one coding problem (Knight's Tour) with a follow-up on alternative approaches.

   Covered · Backtracking, Past projects

Shared by GeeksforGeeks author on gfg · 2021-03-03

Received an offer4 rounds

1. 1
   Coding screenOnline assessment

   Basic to medium coding questions, conducted on-campus over Google Meet during COVID.

   Covered · Arrays & strings

2. 2
   Technical 1Technical

   Compiler vs interpreter, sorting write-up with time and space complexity discussion (stable/unstable, internal/external), OOP concepts with examples, and one coding problem with optimization asks.

   Covered · Sorting, OOP, Operating systems

3. 3
   Technical 2Technical

   Project walkthrough, OS questions on deadlocks and CPU scheduling implementation, and skills/achievements from the resume.

   Covered · Past projects, Operating systems

4. 4
   Hiring managerHiring manager

   Three puzzles including a probability one, explained verbally without coding, followed by hobbies and reverse questions to the interviewer.

   Covered · Puzzles, Behavioral

Shared by vaibhav2216 on gfg · 2021-01-05

Received an offer4 rounds

1. 1
   Online assessmentOnline assessment

   Fully solved one problem and partially the second; invited to interview two days later.

   Covered · Arrays & strings

2. 2
   Technical 1Technical

   Next-greater-element and smallest/second-smallest element with pseudo code, complexity and multiple approaches; then a Java 'public static void main' explanation.

   Covered · Stacks, Arrays & strings, OOP

3. 3
   Technical 2Technical

   Project APIs deep dive, then implement Kadane's algorithm end to end with test cases the interviewer provides.

   Covered · Dynamic programming, API design

4. 4
   Hiring managerHiring manager

   Full resume walkthrough including an ML project and UI/UX work, followed by a scenario on designing a new feature for their ticketing system and questions on what ServiceNow does.

   Covered · Past projects, Case study, Domain knowledge

Shared by GeeksforGeeks author on gfg · 2024-02-21

Received an offer3 rounds

1. 1
   Technical depthTechnical

   Data analysis and ML topics with project deep-dive from college work.

   Covered · SQL, Past projects

2. 2
   CodingTechnical

   SQL query formulation and Java coding questions with emphasis on precise query construction.

   Covered · SQL, Arrays & strings

3. 3
   Offer discussionHiring manager

   Salary negotiation call rather than a technical interview.

   Covered · Behavioral

Shared by GeeksforGeeks author on gfg · 2023-08-18

Received an offer3 rounds

1. 1
   Online assessmentOnline assessment

   MCQs plus one medium coding question.

   Covered · Arrays & strings

2. 2
   Technical 1Technical

   Two coding problems: Pascal's triangle with both brute and better approaches, and set-matrix-zeroes done in place.

   Covered · Matrix, Arrays & strings

3. 3
   Technical 2Technical

   K-th smallest element in a BST and Pythagorean triplet in an unsorted array.

   Covered · Trees, Arrays & strings

Shared by Anonymous on gfg · 2022-05-09

Received an offer4 rounds

1. 1
   Technical 1Technical

   Resume walkthrough on an IoT project then pattern-printing and a deque-based airport check-in priority problem.

   Covered · Arrays & strings, Data structures & algorithms

2. 2
   Technical 2Technical

   Packing max cubes into a big cube (recursive with DP optimization) and printing all permutations of a string.

   Covered · Recursion, Dynamic programming

3. 3
   Technical 3Technical

   Permutations again, tic-tac-toe optimal move, and recursively adding two numbers.

   Covered · Recursion, Backtracking

4. 4
   HRBehavioral

   Situational questions on unfriendly peers, correcting a manager's mistake, and 'why ServiceNow'.

   Covered · Behavioral, Conflict handling

Shared by GeeksforGeeks author on gfg · 2017-12-08

Received an offer3 rounds

1. 1
   Online testOnline assessment

   60-minute HackerRank test with one coding question plus 15 MCQs on OS, DBMS and algorithms.

   Covered · Data structures & algorithms, OS, DBMS

2. 2
   Technical 1Technical

   Standard DSA warm-up: second highest element with linear approach, then merge in a sorted matrix; ends with OOP questions.

   Covered · Arrays & strings

3. 3
   Technical 2Technical

   Deep resume dive, database design for a feedback system, 'what is the cloud', SDLC, and why ServiceNow.

   Covered · Past projects, System design

Shared by GeeksforGeeks author on gfg · 2021-08-01

Received an offer3 rounds

1. 1
   Technical 1Technical

   House Robber III with optimal DP solution, dry run on a shared CodePad, then heaps, and SQL vs NoSQL comparison.

   Covered · Dynamic programming, Trees, DBMS

2. 2
   Technical 2Technical

   Implement queue with two stacks, then a deque supporting O(1) push/pop from both ends using two linked lists after a hint; reverse a linked list; heap implementation and heapify.

   Covered · Linked lists, OOP

3. 3
   Hiring managerHiring manager

   C++ vs Java fundamentals, design Netflix focused on the DB schema, one probability puzzle (three ants on a triangle), and standard HR questions.

   Covered · System design, OOP, Puzzles, Behavioral

Shared by GeeksforGeeks author on gfg · 2021-01-01

Received an offer3 rounds

1. 1
   Technical 1Technical

   Three coding problems on paper, then AngularJS questions and a pagination design problem for 100 objects with page controls.

   Covered · Data structures & algorithms, System design

2. 2
   System design + concurrencySystem design

   Given: if saving one object takes 1 minute, how long for 1000 - probe on parallelism/system thinking; discussion of previous rejections and how you handled them.

   Covered · System design, Concurrency

3. 3
   Technical + HRHiring manager

   Explain a project, real-life applications of stack/queue, and how ML could estimate travel time between two cities.

   Covered · Past projects, Domain knowledge

Shared by GeeksforGeeks author on gfg · 2021-06-01

Received an offerBase 35L INR, 10% bonus, ~8.5 LPA in stock; total ~49 LPA7 rounds

1. 1
   CodingTechnical

   Container With Most Water with two-pointer, a hashset pair-matching question, JavaScript output questions on promises/setTimeout/this, and an open-ended DB schema plus APIs for credit/debit bank transactions.

   Covered · Arrays & strings, Hashing, API design

2. 2
   CodingTechnical

   Binary-search-on-answers candy distribution problem and nearest smaller element with monotonic stack.

   Covered · Binary search, Stacks

3. 3
   UI system designSystem design

   Design a reusable configurable table component: contract, complex cell handling, extensibility.

   Covered · Low-level design, API design

4. 4
   System designSystem design

   Design a messaging service: APIs, DB schema, queries, and code snippets for core logic.

   Covered · API design, Scalability

5. 5
   Coding (extra)Technical

   LeetCode 721 Accounts Merge, brute force with hashmaps then DFS pseudo code.

   Covered · Graphs

6. 6
   Hiring manager (US)Hiring manager

   General experience discussion and Basic Calculator-style problem, discussed approach rather than fully solving.

   Covered · Behavioral, Data structures & algorithms

7. 7
   Hiring manager (India)Hiring manager

   Culture, career, past projects; final HM before offer.

   Covered · Past projects, Behavioral

Shared by u/SuccessBest9713 on reddit · 2025-04-24

Received an offer5 rounds

1. 1
   Online assessmentOnline assessment

   Two LeetCode-medium problems on HackerRank; both solved fully.

   Covered · Arrays & strings

2. 2
   DSA + JavaScriptTechnical

   Two DSA problems with complexity discussion and resume-based JS questions.

   Covered · Data structures & algorithms, JavaScript

3. 3
   DSA + projectTechnical

   Two more coding problems plus project deep dive.

   Covered · Data structures & algorithms, Past projects

4. 4
   Hiring managerHiring manager

   Coding plus computer fundamentals.

   Covered · Data structures & algorithms, OS, DBMS

5. 5
   HRBehavioral

   Culture-fitment discussion.

   Covered · Behavioral

Shared by LeetCode Discuss user on leetcode · 2022-08-01

Received an offer3 rounds

1. 1
   Technical (Sr. SWE)Technical

   LC easy on arrays, LC hard on DP, plus OOP theory (builder/factory patterns, internal HashMap, MergeSort vs QuickSort pseudo-code).

   Covered · Arrays & strings, Dynamic programming, OOP

2. 2
   Technical (Staff SWE)System design

   40 minutes of design deep-dive on the candidate's own start-up project, then Jump Game II with DP and greedy discussion.

   Covered · System design, Dynamic programming

3. 3
   Hiring managerHiring manager

   In-depth resume and project discussion followed by one easy DSA question wrapped in a wordy prompt.

   Covered · Past projects, Data structures & algorithms

Shared by LeetCode Discuss user on leetcode · 2024-04-01

Received an offer4 rounds

1. 1
   DSATechnical

   Recursion vs iteration complexity, a binary-search variant, and a 9x9 Sudoku solver.

   Covered · Recursion, Binary search, Backtracking

2. 2
   DSA + system designSystem design

   Octal-to-decimal conversion, sliding window maximum with edge cases, and HLD/LLD on given scenarios with event-driven architecture and message queues.

   Covered · Sliding window, System design

3. 3
   MiscellaneousTechnical

   Subnet mask generation from CIDR, build your own generic List type, write a regex, and project discussion.

   Covered · Networking, Low-level design

4. 4
   HLD + HMHiring manager

   HLD for an Amazon microservice, debug an escalated latency spike, DB schema for an employee hierarchy with replication/sharding, and ServiceNow tech-stack chat.

   Covered · System design, DBMS, Debugging

Shared by LeetCode Discuss user on leetcode · 2023-11-01

Received an offer3 rounds

1. 1
   Rounds 1-2: DSATechnical

   Easy-to-medium DSA questions across two rounds.

   Covered · Data structures & algorithms

2. 2
   Tech grillingTechnical

   Producer-consumer batch printer with timestamp ordering, spring-boot request handling at high load, pagination for request-size limiting, circuit-breaker pattern, deployment platforms.

   Covered · DBMS, Concurrency, API design, Scalability

3. 3
   Hiring managerHiring manager

   Min swaps to balance parentheses (collaborative debugging with the interviewer), REST vs microservices, stateless auth, project discussion.

   Covered · Arrays & strings, API design

Shared by LeetCode Discuss user on leetcode · 2025-03-01

Received an offer2 rounds

1. 1
   Online codingOnline assessment

   45-minute one-question coding screen.

   Covered · Data structures & algorithms

2. 2
   DSA + DPTechnical

   Maximum path sum in a matrix with recursive plus tabular DP explained, then a pattern-matching-style problem where a standard algorithm was not expected.

   Covered · Dynamic programming

Shared by LeetCode Discuss user on leetcode · 2020-07-31

Received an offer5 rounds

1. 1
   DSATechnical

   Jump Game II with DP then greedy optimization.

   Covered · Greedy, Arrays & strings

2. 2
   DSA + HLDTechnical

   Remove K Digits problem plus a high-level design discussion.

   Covered · Greedy, System design

3. 3
   Hiring managerHiring manager

   Situational and behavioral, plus a Majority Element variant (more than three distinct elements) and one HLD problem.

   Covered · Behavioral, System design

4. 4
   DSA + DB designTechnical

   Modified maximal square with coordinates plus basic DB schema design (re-loop after hiring pause on original team).

   Covered · Dynamic programming, DBMS

5. 5
   DB design + DSATechnical

   Basic DB schema plus a coding problem to close out the re-loop.

   Covered · DBMS, Arrays & strings

Shared by LeetCode Discuss user on leetcode · 2025-05-01

Outcome not shared3 rounds

1. 1
   HackerRank OAOnline assessment

   Two story-based coding problems including a subset-selection min-of-two-arrays maximization; 3/4 test cases passed.

   Covered · Arrays & strings, Greedy

2. 2
   DSATechnical

   Two coding problems: flight-landing-time gap boolean array and a hotel-cottage booking feasibility check.

   Covered · Arrays & strings, Sorting

3. 3
   Hiring managerHiring manager

   APIs needed for a Udemy-like application and a producer-consumer implementation prompt.

   Covered · API design, Concurrency

Shared by LeetCode Discuss user on leetcode · 2024-02-01

Outcome not shared3 rounds

1. 1
   DSA + SeleniumTechnical

   Types of waits in Selenium, dropdowns, actions class, TestNG vs JUnit, plus code to swap without a temp variable and palindrome check.

   Covered · Testing, OOP, Arrays & strings

2. 2
   DSA + Selenium deepTechnical

   Exception handling, framework internals, rerunning failed TestNG cases without testng-failed.xml, list files in a folder, duplicate-indices, balanced brackets, shopping-cart test scenarios.

   Covered · Testing, Arrays & strings

3. 3
   HM + codingHiring manager

   Framework and current-project questions plus valid-IP regex/coding.

   Covered · Behavioral, Regex

Shared by LeetCode Discuss user on leetcode · 2025-02-01

Received an offer3 rounds

1. 1
   Technical 1Technical

   Introduction, resume, AVL tree questions.

   Covered · Trees, Past projects

2. 2
   Technical 2Technical

   Project discussion, ML/JS basics, Kadane variant, and a DP grid minimum-path-sum with two follow-ups.

   Covered · Dynamic programming, JavaScript

3. 3
   Technical 3Technical

   Project discussion then a string problem, all coded and run on an online compiler with interviewer-provided edge cases.

   Covered · Arrays & strings

Shared by LeetCode Discuss user on leetcode · 2024-11-01

Received an offer4 rounds

1. 1
   Online assessmentOnline assessment

   Three questions in one hour at medium/hard difficulty; solved 2.5.

   Covered · Dynamic programming, Arrays & strings

2. 2
   Technical 1Technical

   DP problem (LC medium/hard) and an ad-hoc array easy problem; interviewer added Java, system design and OOD topics.

   Covered · Dynamic programming, OOP

3. 3
   Technical 2Technical

   Map-based tricky problem then REST API design (LLD) with HLD follow-ups; more Java and OOD discussion.

   Covered · Hashing, API design, Low-level design

4. 4
   ManagerialHiring manager

   Medium DSA plus resume/behavioral, relocation and tech-stack fit; verbal confirmation then written offer.

   Covered · Data structures & algorithms, Behavioral, Past projects

Shared by Chandana Akriti on blog · 2024-08-17