EA

Role: Software Engineer

College: Premier colleges in India

Interview Date: Not Specified

Interview Type: On-Campus, Full-Time

Result: Selected (Inferred from context of article detailing successful hiring process for Rubal)

Difficulty: Medium

Rounds: 4 rounds

Topics Asked: Quantitative, Logical, Verbal, Coding, Data Structures, Algorithms, OOPS, Web Technologies (Reactjs, Nodejs, MongoDB, Elastic), RESTful web services, System Design, Heap, Quicksort, Bitwise operations

Experience:

EA conducted its first recruitment drive across Premier colleges in India. The hiring process included an online objective test, a written programming test, and multiple technical interviews.

Round 1: Online Round (75 mins)
This round had 4 sections: Quantitative, Logical, Verbal, and Coding. The coding section had 2 questions and was 40 minutes long.

Coding Questions:

• Convert String A to String B in minimum number of moves. Conditions: You can only modify string A. You can only swap a character with the letter at the starting position of string A. You can replace a character if that doesn't exist in string B. Swapping or replacing a character costs 1 move.
• Check if a tree is a mirror of it.

Round 2: Technical F2F (1 hr - 75 mins)

• "Tell me about yourself."
• "Explain your projects, hackathon and internship work briefly."
• "Find loop in a linked list." (Asked to write code).
• "What is the Floyd-Warshall algorithm?"
• "Which language are you strong in?"
• "What are virtual functions?"
• OOPS concepts in C++.
• Design a puzzle shown on the interviewer's laptop and write the algorithm behind it.

Round 3: Technical F2F (45 mins - 1 hr)

• Questions on Reactjs, Nodejs, MongoDB, and Elastic.
• "What are RESTful web services?"
• "What kind of REST services did you use during your internship and how did you implement them?"
• Design an e-commerce system like Flipkart.
• "How do you instantaneously re-render the UI if there are changes in Db?"
• Questions on DOM in React and how rendering is done.
• "How do you send query parameters in a URL using GET?"

Round 4: Technical F2F and Managerial (1 hr - 75 mins)

• Given an organization hierarchy: How to get the seniors of an employee? How to get the people under an employee? What kind of data structures to use? (Asked to write code and explain).
• Given an array consisting of positive and negative numbers: Calculate the maximum sub-array sum in minimum time.
• An array consists of 1-100 numbers except one is missing: How to find it in minimum time? (Discussed sum and subtract approach, then bit-wise XOR).
• "How do you update yourself with the latest tech-related stuff?"
• "Whom do you seek help if you face any issue while programming or developing something?"
• "Do you like working in teams?"
• "How positively do you take competency in the workplace?"
• Explain Heap and Quicksort. Worst and best cases of quicksort.

Overall Experience: The hiring process was extensive, focusing on quality, design, and algorithmic approach, with emphasis on projects and internships. The interviewer encouraged stimulating discussions.