Specialist Programmer

You have been given two strings, 'str1' and 'str2'.

Your task is to return true if the given two strings are isomorphic to each other, else return false.

Note :

Two strings are isomorphic if a one-to-one mapping is possible for every character of the first string ‘str1’ to every character of the second string ‘str2’ while preserving the order of the characters.

All occurrences of every character in the first string ‘str1’ should map to the same character in the second string, ‘str2’.

For example :

If str1 = “aab” and str2 = “xxy” then the output will be 1. ‘a’ maps to ‘x’ and ‘b’ maps to ‘y’.

If str1 = “aab” and str2 = “xyz” then the output will be 0. There are two different characters in 'str1', while there are three different characters in 'str2'. So there won't be one to one mapping between 'str1' and 'str2'.

Ninja is a boy who lives in ninjaland. Every day, during the morning he gets 1 coin from his mother. He wants to buy exactly ‘N’ candies. Each of the candies cost 2 coins usually and 1 coin if it is on sale. Ninja has to buy exactly K[i] candies of the i-th type(he buys candies in the evening).

Ninjas can buy any(possibly zero) number of candies of any type during any day(if he has enough money to do it). If the candy is on sale he can buy it for 1 coin and otherwise he has to buy it for 2 coins.

There are ‘M’ special offers in the candy shop. The j-th offer (D[j], C[j]) means that candies of the C[j]-th type are on sale during the D[j]-th day.

Ninja wants to buy all candies as soon as possible. Your task is to calculate the minimum day when he can buy all the candies.

1) What is hoisting
2) What is closures
3) Difference between promise and observable
4) What is callback hell
5) What is async await
6) How inheritance works in Javascript

1) Which annotations I have used in my project
2) What is discovery/eureka service
3) What is gateway service
4) Which JPA implementation we are using and how it helps
5) Tell about Java 8 features
6) Implement one streams function that takes and array and multiply each element by 2 and then sums them.
7) How can we handle asynchronous programming in java.: CompletableFuture and Future

1) Have you faced any performance issue and how you handled it
2) Which tool is used for performance testing
3) What is SingleSignOn. How you implemented that. As I had this on my resume
4) What is Multitenancy, how it helps and how you implemented that only at high level. As I had this also on my resume
5) Where are you deploying services. Is it cloud or on premises
6) Have you written junit tests
7) Tell some different types of testing
8) Which tools are used for monitoring.
9) What is docker
10) There are two tables having these columns. Provide a SQL query with which you can fetch only these columns. : Based on joins
11) One beginner level program also I was asked to write.