ServiceNow Interview Questions, Process, and Tips

Q1. Low level Design of hashmap
Ans. 
Hashmap is a data structure that stores key-value pairs and allows for quick retrieval of values based on keys.
• Hashmap is typically implemented using an array of linked lists or a balanced binary search tree.

• Each key is hashed to determine its index in the array, where the corresponding value is stored.

• Collision handling is important in hashmap design to address cases where multiple keys hash to the same index.

• Hashing ...read more
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Q2. Write topological sort in directed acyclic graph
Ans. 
Topological sort is a linear ordering of vertices in a directed acyclic graph where for every directed edge uv, vertex u comes before vertex v.
• Create a list to store the topological ordering of vertices.

• Find a vertex with no incoming edges and add it to the list.

• Remove the vertex and its outgoing edges from the graph.

• Repeat the process until all vertices are added to the list.
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Standard question from sql and python in hackerrank

Q1. Reverse a linked list
Ans. 
Reverse a linked list by changing the direction of pointers
• Start with three pointers: current, previous, and next

• Iterate through the linked list, updating pointers to reverse the direction

• Return the new head of the reversed linked list
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Q2. Question based on joins and subquery
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Q1. More question about project
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Q2. What do you know about genAI
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Q1. Background about your current Organization
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Q2. Your skill set and how it matches with the current Organization Skill set
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Q3. Questions in Excel, Project Management, Process Flow Understanding
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Q1. How did you manage a situation when the project you were leading didn't get green signal from leadership.
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Q2. Core competence questions on FP&A
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