ServiceNow Senior Sdet Engineer Interview Questions and Answers

String based problem

Q1. Python Programming concepts.
Add your answer
Q2. Pattern search problem
Ans. 
Pattern search problem
• The problem involves searching for a specific pattern in an array of strings

• The pattern can be a substring or a regular expression

• The solution should return the indices or strings that match the pattern
Answered by AI
Add your answer

Q1. Leetcode medium level python problems
Add your answer

Aptitude and coding round, one coding question and others are computer fundamentals

Q1. Return true if Subarray is present whose sum is 0
Add your answer
Q2. Project, oops, dbms
Add your answer

Q1. Subarray sun equal to k
Add your answer
Q2. Project, oops, dbms
Add your answer

Q1. Did not got slected i answered all still
Add your answer

General aptitude and out put realted questions

Face to face dsa and string manipulations

Q1. Write a java program to convert the first letter of each word in upper case
Ans. 
Java program to convert first letter of each word to upper case
• Split the input string into an array of words

• Iterate through each word and capitalize the first letter

• Join the words back together into a single string
Answered by AI
Add your answer
Q2. Write a java program to remove the duplicate characters from a string
Ans. 
Java program to remove duplicate characters from a string
• Create a HashSet to store unique characters

• Iterate through the string and add each character to the HashSet

• Construct a new string by appending characters from the HashSet
Answered by AI
Add your answer

Q1. Leetcode Interview Question company tag atlassian. Some modifications of those
Add your answer

Q1. Design a web crawler
Ans. 
Design a web crawler to fetch and index web pages
• Start by defining the scope of the crawler (e.g. which websites to crawl)

• Implement a system to fetch web pages using HTTP requests

• Parse the HTML content to extract relevant information (e.g. links, text)

• Store the extracted data in a database or index for later retrieval

• Implement a scheduling mechanism to prioritize and manage the crawling process
Answered by AI
Add your answer

Frequency array, java collection, missing number

Q1. What is React Context?
Ans. 
React Context is a feature in React that allows data to be passed down the component tree without having to pass props manually.
• Context provides a way to share values like themes, user data, etc. across the component tree.

• It avoids prop drilling, where props are passed down multiple levels to reach a component that needs them.

• Context consists of two parts: a Provider component that provides the data and a Consumer comp...read more
Answered by AI
Add your answer
Q2. What is meant by closure in javascript?
Ans. 
Closure is a function that has access to its parent scope, even after the parent function has closed.
• Closure is created when a function is defined inside another function.

• The inner function has access to the outer function's variables and parameters.

• The outer function returns the inner function, which can be called later with the parent scope still accessible.

• Closures are used for data privacy, event handlers, and call
Answered by AI
Add your answer
Q3. What are the complicated tasks you've done exceeding everyone's expectation?
Add your answer
Q4. Algorithm to convert roman numeral to numbers?
Ans. 
Algorithm to convert roman numeral to numbers
• Create a dictionary to map roman numerals to their corresponding values

• Iterate through the roman numeral string from right to left

• If the current value is less than the previous value, subtract it from the total

• If the current value is greater than or equal to the previous value, add it to the total

• Return the total
Answered by AI
Add your answer

Q1. What is React context?
Ans. 
React context is a way to pass data through the component tree without having to pass props down manually at every level.
• Context provides a way to share values like a theme or user data across the component tree.

• It avoids prop drilling and makes the code cleaner and more maintainable.

• Context consists of two parts: a Provider component that provides the data and a Consumer component that consumes the data.

• Context can be...read more
Answered by AI
Add your answer
Q2. What is abstract class in javascript?
Ans. 
There is no abstract class in JavaScript.
• JavaScript does not have a built-in abstract class concept.

• However, it is possible to create abstract classes using functions and prototypes.

• Abstract classes are used as blueprints for other classes to inherit from.

• They cannot be instantiated on their own and must be extended by a subclass.

• Abstract methods can be defined in the abstract class and must be implemented in the subcl
Answered by AI
Add your answer
Q3. What is meant by function overloading and function overriding?
Ans. 
Function overloading is when multiple functions have the same name but different parameters. Function overriding is when a subclass provides its own implementation of a method that is already present in the parent class.
• Function overloading is used to provide multiple ways to call a function with different parameters.

• Function overriding is used to provide a specific implementation of a method in a subclass.

• Function ove...read more
Answered by AI
Add your answer
Q4. Implement counter in react app
Ans. 
Implement a counter in a React app
• Create a state variable to hold the count

• Render the count in the UI

• Add buttons to increment and decrement the count

• Update the state variable on button click
Answered by AI
Add your answer

Q1. Why strings are immutable
Ans. 
Strings are immutable to ensure data integrity and prevent unintended changes.
• Immutable strings allow for safer multithreading and concurrency.

• String interning is possible because of immutability.

• Immutable strings can be used as keys in dictionaries and hash tables.

• Examples of immutable data types include numbers and tuples.
Answered by AI
Add your answer