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      Cognizant

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      Principal Engineer Interview

      Oct 28, 2025
      Anonymous interview candidate
      No offer
      Neutral experience
      Average interview

      Application

      I interviewed at Cognizant

      Interview

      The overall process took about 3–4 weeks from the initial screening to the final HR discussion. The interview experience was well-structured, with clear communication at every step. The focus was primarily on technical depth, design thinking, and leadership skills, which aligns well with the seniority of the role.

      Interview questions [1]

      Question 1

      Design a high-traffic online food delivery system that can handle thousands of concurrent orders per minute. Explain how you’d ensure scalability, fault tolerance, and real-time updates to users
      Answer question