I recently gave an interview at cars24 for SDE - 1/2 role. This interview was walk-in interview (Gurgoan Office). I have applied through Linkedin post shared by recruiter and emailed my resume to the email mentioned in the post.\n\nFollowing questions were asked from me.\n\n**Ques1. What is HashMap?**\n**Ques2. How HashMap works internally?**\n**Ques3. How HashMap handle collision?**\n**Ques4. What is concurrentHashMap?**\n**Ques5. Difference between HashMap and concurrentHashMap.**\n**Ques6. How concurrentHashMap optmized over HashMap?**\n**Ques7. Difference between @Service and @Repository annotations.**\n**Ques8a. If preoder of a BST is given [8, 5, 1, 7, 10, 12]. Can you construct a BST from it?**\n**Ques8b. If yes, then expain the approach how will you construct.**\n\nFinally, the interview went for around 30 mins, then I asked him if he could give some feedbacks and insights on my intrview.\n\nVerdict - Rejected

I recently gave an interview at cars24 for SDE - 1/2 role. This interview was walk-in interview (Gurgoan Office). I have applied through Linkedin post shared by