TAJSATS AIR CATERING Junior Java Developer Interview Questions and Answers

Next greater element is a problem where we find the closest greater element for each element in an array.

• Iterate through the array

• For each element, compare it with the elements on its right

• Find the first element greater than the current element

• Store the result in a new array or data structure

Program to find all prime numbers up to given N.

• Start with 2 and iterate up to N

• For each number, check if it is divisible by any number from 2 to its square root

• If not divisible, add it to the list of primes

Fetching unique URLs from a 10GB file with non-unique URLs.

• Read the file in chunks to avoid memory issues.

• Use a hash set to store unique URLs.

• Iterate through each URL in the file and add it to the hash set if it doesn't already exist.