Infinera Network Engineer NOC Interview Questions and Answers

Basic java mcq, Java Hibernate Spring MVC framework questions

Q1. Some program snippets were given in C language and told to debug it
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Q2. Running median in stream
Ans. 
Calculate the running median of a stream of numbers.
• Use two heaps - a max heap for the smaller half of the numbers and a min heap for the larger half.

• Keep the heaps balanced by ensuring the size difference is at most 1.

• If the heaps are balanced, the median is the average of the top elements of the two heaps. Otherwise, it is the top element of the larger heap.
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Q1. Why we use trie and its advantages and dis-advantages
Ans. 
Trie is a tree data structure used for efficient retrieval of key-value pairs, commonly used in autocomplete and spell check applications.
• Advantages: efficient prefix search, space optimization for storing keys with common prefixes, easy to implement autocomplete and spell check functionalities

• Disadvantages: can be memory intensive for large datasets, complex to implement compared to other data structures like hash tab...read more
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Q2. Networking related questions
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Q1. You Have a Data Stream and integers are coming at each second you have to identify the erroneous values.
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Q1. Tell me about your previous company role ?
Ans. 
I was a software engineer responsible for developing and maintaining web applications for a financial services company.
• Developed and maintained web applications using technologies such as Java, Spring, and Angular

• Collaborated with cross-functional teams to gather requirements and deliver solutions

• Participated in code reviews and testing to ensure high quality software

• Implemented new features and enhancements to improve
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Q2. Willing to join Arista ?
Ans. 
Yes, I am willing to join Arista as a Software Engineer.
• I am excited about the opportunity to work at Arista and contribute to their innovative projects.

• I have researched the company and believe that my skills align well with their values and goals.

• I am confident that I can make a positive impact on the team and help drive success at Arista.
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One Hr interview with 3-4 coding questions on strings,array and linked list

DSA MCQ on Computer Core Subjects

Q1. Javascript / UI related
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SYSTEM Design

It's a one hour coding test which tests basic problem solving skills.

Q1. In this round interviewer tests your problem solving skills, you will be given a link to a coding platform and will be asked to solve couple of problems (1- easy, 2- medium). Approach will be considered ra...read more
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Q1. This will test your technical skills for the domain you have been shortlisted for
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Q1. It's kind of a behavioural round which targets your previous experiences and your exposure
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Quite easy, implementation questions were there

Q1. Implement Hash Maps
Ans. 
Hash maps are data structures that store key-value pairs and provide efficient lookup, insertion, and deletion operations.
• Hash maps use a hash function to convert keys into array indices.

• Collisions can occur when multiple keys hash to the same index, requiring collision resolution techniques.

• Common collision resolution methods include chaining and open addressing.

• Hash maps have an average time complexity of O(1) for ba...read more
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