How will you check the validity of an expression containing nested parentheses?
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Can we store null in arraylist?
What is the difference between data type and data structure?
Why we use arraylist instead of linked list?
Why insertion is faster in linked list?
Give a real time example of stack
write a program to accept name & sort them?
How do you implement a stack?
Differentiate between priorityqueue and treeset.
Are linked lists considered linear or non-linear data structures?
What stack means?
Why hashmap is faster than hashtable?
What is garbage collection in data structure?