Persistent Systems Java Programmer interview questions

There were 2 rounds of technical interviews conducted in a span of 2 MONTHS. I repeat, 2 MONTHS. Reason being L2 panel not available. Moving forward, I clear both the rounds and then HR says they don't have budget! For sake of comparison, let's say I was quoting X amount as my expected salary to each and every company I was applying. Persistent Systems gave X - 5 LPA quote and rest other firms offered in the range of X - 1 to X + 3 LPA. Regret wasting so much time and energy on Persistent Systems. Worst interview experience ever.