ServiceNow Interview Questions, Process, and Tips

Q1. Pollyfill for .reduce & Promise
Ans. 
Polyfill for .reduce & Promise
• For .reduce polyfill, create a function that takes an array, a callback function, and an initial value as arguments

• Inside the function, loop through the array and apply the callback function to each element, updating the accumulator

• For Promise polyfill, create a function that takes a callback function with resolve and reject parameters

• Inside the function, call the callback function with re...read more
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Q2. Two sum problem
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Q3. Move all zero to end & design Google photos life application
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Move all zeros to end of array & design Google Photos life application
• Iterate through the array and move all zeros to the end

• Design a user-friendly interface for Google Photos life application

• Implement features like automatic photo backup, organization, and sharing

• Utilize machine learning for image recognition and categorization
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Q4. About last project. Strength & weakness, Why I left with offer?
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Q1. Tell me about your self?
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Q2. What technology & tools u know ? And basic questions regarding that topics ?
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Q1. Job culture and job responsibilities ?
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Q2. Some questions on an analytical tools like power BI ?
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Q1. WHAT IS INCIDENT MANAGMENT
Ans. 
Incident management is the process of identifying, analyzing, and resolving incidents to minimize their impact on business operations.
• Incident management involves documenting incidents, categorizing them based on severity, and prioritizing them for resolution.

• It includes creating incident tickets, assigning them to appropriate teams or individuals, and tracking their progress until resolution.

• Examples of incidents incl...read more
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Q2. WHAT IS LINUX OS
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Linux OS is an open-source operating system based on the Linux kernel, known for its stability, security, and flexibility.
• Open-source operating system

• Based on the Linux kernel

• Known for stability, security, and flexibility
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We got a mail from the HR directly to write the round one- coding round. This round was for almost 2 hours where we were asked questions from DSA. The difficulty of the problems were medium to hard.

Q1. Asked about My Resume
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Q2. Asked 2 Puzzle and DSA questions. Medium level but a bit tricky ones.
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Q1. What is a stack?
Ans. 
A stack is a data structure that follows the Last In, First Out (LIFO) principle, where elements are added and removed from the top.
• Elements are added to the top of the stack and removed from the top as well

• Common operations on a stack include push (add element) and pop (remove element)

• Examples of stacks include the call stack in programming and a stack of plates
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Q2. What is vpc and why it is needed
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VPC stands for Virtual Private Cloud, it is needed to securely isolate resources within the cloud environment.
• VPC allows you to create a private network in the cloud.

• It provides control over network settings such as IP address range, subnets, route tables, and network gateways.

• VPC helps in securing resources by setting up security groups and network access control lists.

• It enables you to connect your on-premises networ...read more
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Q3. What is load balancer
Ans. 
A load balancer is a device or software that distributes network or application traffic across multiple servers to ensure no single server is overwhelmed.
• Balances traffic across multiple servers

• Improves performance and reliability

• Can be hardware or software based

• Examples: F5 BIG-IP, NGINX, HAProxy
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Q4. What is IAM and policies
Ans. 
IAM stands for Identity and Access Management. Policies are rules that determine who has access to what resources.
• IAM is a framework for managing digital identities and controlling access to resources

• IAM policies are rules that define the permissions and access levels for different users or groups

• IAM policies can be attached to users, groups, or resources to control access

• IAM helps organizations ensure that only author...read more
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Q5. What is DNS server
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DNS server is a system that translates domain names to IP addresses, allowing users to access websites using human-readable names.
• DNS servers store a database of domain names and their corresponding IP addresses.

• When a user enters a domain name in a web browser, the DNS server is queried to find the corresponding IP address.

• DNS servers help in the efficient routing of internet traffic by translating domain names to IP ...read more
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Q6. What are the types of lookup tables
Ans. 
Types of lookup tables include direct mapping, associative arrays, and hash tables.
• Direct mapping: uses a key to directly access the corresponding value in the table

• Associative arrays: store key-value pairs where keys are unique

• Hash tables: use a hash function to map keys to values for efficient retrieval
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Q7. What are troubleshooting steps for network
Ans. 
Troubleshooting steps for network issues
• Check physical connections (cables, ports)

• Verify network settings (IP address, subnet mask)

• Restart networking devices (modem, router)

• Run network diagnostics tools (ping, traceroute)

• Check for software conflicts or firewall issues
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Basic Hackerrank online test with two medium-hard leetcode level question in 90 mints

Q1. 30 minutes interview call started with basic introduction followed by resume questions then DSA easy-medium level question. After that oops , cn questions were asked . To end the interview he asked me one...read more
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Q1. Technical round 2 . duration - 45minutes to 1 hr basic introduction resume deep dive leetcode medium - hard question A lot of conceptual questions of database,operating system ,oops and computer networking
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Q1. Hiring manager round 30 mints duration basic hr questions and discussion was done
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