Juniper Networks Software Engineer II Interview Questions and Answers

Q1. What is polymorphism
Ans. 
Polymorphism is the ability of a function or method to behave differently based on the object it is acting upon.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• It enables a single interface to be used for different data types or classes.

• Examples include method overloading and method overriding in object-oriented programming.
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Q2. Find missing number from nth number array.
Ans. 
Find missing number from nth number array.
• Iterate through the array and calculate the sum of all numbers

• Calculate the sum of numbers from 1 to n using the formula n*(n+1)/2

• Subtract the sum of array from the sum of numbers from 1 to n to find the missing number
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Q3. Explain inheritance and it types
Ans. 
Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.
• Inheritance allows a class to reuse code from another class.

• Types of inheritance include single inheritance, where a class inherits from only one parent class, and multiple inheritance, where a class inherits from multiple parent classes.

• Example: Class B inherits from Class A, so Class B can access
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Q4. Find 2nd max elements from aaray
Ans. 
Find 2nd max element from array of strings
• Sort the array in descending order

• Skip the first element (max element)

• Return the second element
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Very good but easy
easy question long question

Q1. Java codingg on sql programming
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Q2. Colection framework java concept
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Q1. Questions related to project mentioned in CV. Questions around reliability, availability, scalability of system.
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Q2. 2 medium coding questions on arrays and hashmap.
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Q1. Golang basics, goroutines, channels.
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Q2. Coding questions on a shared board
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Q1. Deep dive into the work at current company and projects.
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Q2. How interprocess communications take place, how goroutines communicate internally, quite in-depth questions, varying over several domains.
Ans. 
Interprocess communication involves various mechanisms like pipes, sockets, shared memory, etc. Goroutines communicate using channels and shared memory.
• Interprocess communication can be achieved through mechanisms like pipes, sockets, shared memory, message queues, etc.

• Goroutines in Go communicate internally using channels, which are typed conduits through which you can send and receive values.

• Shared memory can also be...read more
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Q3. Design a URL shortener service
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Design a URL shortener service
• Generate a unique short code for each URL

• Store the mapping of short code to original URL in a database

• Redirect users from short URL to original URL

• Consider scalability and performance of the service

• Implement analytics to track usage statistics
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Q1. Java basics , oops , spring
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Q1. Manger round basics behavior
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Q1. Find the min and max from List of Integers using java 8 streams.
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Q2. Find 2nd largest element using java 8 streams from list of integers.
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Q3. Given a Product class and some ArrayList data Find which products has price greater than 200 using java 8 streams?. Find which products having maximum price?
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Q4. Increase a value of List of Integers by *2 and written new list.
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Q5. What are the java new features?
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Q6. @Components vs @Repository
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Q7. @SpringBootApplication
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Q8. @Entity explain?
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Q9. How the database is configure?
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Q10. What is Dockerfile?
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Q11. Explain CI CD and your project deployment.
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Q12. What is mutable classes in java? How to create?
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Q1. Yet to sChedule
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Q1. Ds implementation in python
Ans. 
Data structure implementation in Python
• Use built-in data structures like lists, dictionaries, sets, etc.

• Implement custom data structures like linked lists, stacks, queues, trees, etc.

• Utilize libraries like NumPy for efficient array operations

• Practice implementing algorithms using data structures
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Q1. Leetcode medium python question
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