There were 4 rounds (4 technical + HR).

Screening: Written (Aptitude, SCJP Java questions – they just copied and pasted).

1. 1st Technical Round (1 hr): They asked basics of Java, some questions like (swapping 2 numbers without a temporary variable, how can you resolve the overflow in this case?), what is the meaning of public static void main, the producer-consumer problem, singleton design pattern, palindromes, String buffer vs. StringBuilder differences, and access specifiers.

2. 2nd Round: Again, basic questions (1 hr). What is the output of (if x = 6, ++(++x)-----(++7))? (This was stated as wrong). Find the longest palindrome in the given string. Reverse the given string. The interviewer explained the job profile. After that, they said I would get a call from the US.

3. 3rd Round: This was the director round. They mainly looked for English skills. They asked about Java basics, singleton usage, and some brain teasers.

I was not able to clear.

Brain teasers