1. Print unique words sorted in order of length from a file.
2. Rotate an array
3. How threads work? How threads work in a single processor system?

Question

1. Print unique words sorted in order of length from a file.
2. Rotate an array
3. How threads work? How threads work in a single processor system?

Sigiloso · Accepted Answer

1. I gave an HashMap> solution. But the interviewer expected a TreeMap solution. But a TreeMap would not be suitable for this question since it will not add elements of same length.
2. I gave him a O(n*d) solution with constant space. He wanted an O(n) with constant space solution which I could not give.

Sigiloso · Answer

We can use treemap along with comparator to sort based on words length.

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