ServiceNow Senior Software Developer Interview Questions and Answers

Q1. Core deep concepts of c++ and few basic coding questions
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Q1. 1 round consist base of development like OOPS, Basic Concept of solid, Design Pattern, Database, AZURE/AWS, Testing Frameworks, ORM etc.
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Q2. What is Oops in c#?
Ans. 
Object-Oriented Programming concepts in C#
• Oops stands for Object-Oriented Programming.

• It includes concepts like classes, objects, inheritance, polymorphism, encapsulation.

• Example: Creating a class 'Car' with properties like 'make', 'model' and methods like 'drive'.
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Q1. More discussion on basic topic along with some advance area like architecture, security, performance,
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Q1. Mostly want to know how you are fit with there culture, more focus on personality.
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Q1. Reverse a string without any library function.
Ans. 
Reverse a string without any library function.
• Create an empty string to store the reversed string

• Loop through the original string from end to start

• Append each character to the empty string

• Return the reversed string
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Q2. About current project and it's architecture. Challenges you've faced in current project and how did you've solved it. Basic of OOPS
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Q1. Personality check, tell me something about yourself which is not there in CV
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Karet Interview :
5 back to back System design question, we don't need to explain each component but more like list as many as points. Need to finish all the question in 15min

1-2 problem solving question : It's not fency algorithm round with tough question. But true problem solving round using basic knowledge such as hashmap, heap

Q1. Design File System : You have given file size and collection in input 1 : get total size 2 : find top k collections in size
Ans. 
Design a file system to calculate total size and find top k collections in size.
• Create a file system class with methods to add files and calculate total size.

• Maintain a data structure to store the collections and their sizes.

• Implement a method to find the top k collections based on size.

• Consider using a priority queue or sorting the collections based on size.

• Handle edge cases like empty collections or invalid input siz
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Q2. Find total size
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Calculate the total size of an array of strings.
• Iterate through the array and sum the length of each string.

• Use the `length` property of each string to get its size.

• Handle edge cases such as empty strings or null values.
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Q3. Find Top k collections
Ans. 
The question is asking to find the top k collections.
• Use a sorting algorithm to sort the collections in descending order based on a specific criteria.

• Select the top k collections from the sorted list.

• Return the selected collections as an array of strings.
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Q1. Write a program to reverse the string
Ans. 
Program to reverse a string using array of characters
• Create an array of characters from the input string

• Iterate through the array in reverse order and append each character to a new string

• Return the reversed string
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