Amazon Interview Experience | Set 249 (Telephonic Interview)

Telephonic interview:
1. Given a string, display the words in reverse order
I/p: I work at xyz
O/p: xyz at work I

2. Given a linked list modify the linked list as below
I/p: a x b c y z
O/p: a b c x y z

3. What is virtual memory

4. If I am designing a media player and I want to store songs and play them in random order
a) what data structure will you use to store songs?
b) how will select the next song to play in a way which prevents the same song being played in consecutive turn

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