Service Now interview questions
Online test → Technical → Technical → HR·86% entry level
DSA
Showing 33 of 187 reported in this area
Find the Longest Increasing Subsequence in an array
Find the Lowest Common Ancestor (LCA) of two nodes in a binary tree
Print the Top View of a Binary Tree
Print all permutations of a given string.
Given an array of size n, find the majority element (element occurring more than n/2 times) without using extra space and in O(n) time.
Given a binary tree and a target node, print all nodes at distance d from the target node.
Count distinct pairs with given sum
House Robber III
Generate n-bit Gray Code sequence.
Print the right view of a binary tree.
Find a given element in a Bitonic Array
Print all k-sum paths in a binary tree.
Find the kth largest element in an array
Delete a linked list recursively from the end
Generate all stepping numbers in a given range
Search a given word in a 2D grid of characters
Explain how Sudoku evaluation is done efficiently
Check whether a binary tree is a balanced AVL tree
Perform vertical order traversal of an N-ary tree.
Build a Heap from a given array and explain Heapify
Solve the coding problem from LintCode Problem 1915
Sort a stack without using any other data structure
Find an element in a matrix where each row is sorted
Optimize Sieve of Eratosthenes to O(N) time complexity
Implement a Trie to predict the next word (autocomplete)
Find the next greater element for each element in an array
Print the Next Greater Element for every element in an array
Explain how backtracking is used to solve the Sudoku problem.
Print the subarray with the largest sum using Kadane’s Algorithm
Count all non-repetitive palindromic substrings in a given string
Find the longest palindromic substring using constant extra space
Subset Sum Problem: determine if a subset with a given sum exists
Create a deep copy of a linked list with next and random pointers.
CS fundamentals
Showing 14 of 133 reported in this area
What is a gradient and how is it used in machine learning?
Explain ACID properties in DBMS.
Design an OR gate using only NAND gates.
Explain the difference between BFS and DFS
Explain the Software Development Life Cycle (SDLC)
Transpose a table in SQL.
Explain Sentiment Analysis and the PageRank algorithm
How does Google identify your location from an image?
Explain page faults and deadlocks in Operating Systems
How is large-scale data stored and managed in databases?
Explain Java uncaught exceptions and the Exception hierarchy
Design inheritance at the compiler level using OOP principles
Explain synchronization and its use in concurrent programming
Write an SQL query using LEFT JOIN with additional conditions.
System design
Showing 4 of 24 reported in this area
Design a Coffee Vending Machine system.
Design a system (high-level system design question)
Design a cinema hall using object-oriented programming concepts
Design the database schema for an e-commerce website like Amazon.
Puzzles
Showing 3 of 14 reported in this area
Explain and prove the Monty Hall problem
Explain and solve the Three Door Puzzle (Monty Hall problem).
Given a number of chocolates and wrappers, find the maximum chocolates you can eat.
Behavioural
Showing 3 of 8 reported in this area
How do you cope with irritating or stressful situations at work?
How would you handle conflicts or issues with colleagues or your manager in a work scenario?
How would you convince a class of 60 students to attend a session when they already have sufficient attendance and punishment is not an option?
Aptitude
Showing 3 of 6 reported in this area
Basic aptitude and logical reasoning questions
General aptitude and logical reasoning questions
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Logical reasoning aptitude questions involving basic analytical thinking
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Showing 60 of 295 questions. Ranked by how often the same question came back across reports.
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What questions does Service Now ask?
Candidate interview reports most often cover DSA (50%) and CS fundamentals (36%).
How many rounds does Service Now interview have?
Candidate interview reports show an average of 3.9 rounds per experience, with a typical sequence of Online test → Technical → Technical → HR. Individual interview paths can vary.
Is the Service Now interview hard?
Among questions with a reported difficulty, the mix is easy 41%, medium 48%, hard 11%.