What does stack top do?
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which notations are used in evaluation of arithmetic expressions using prefix and postfix forms?
What is heap and its types?
What is time complexity of sorting algorithms?
Why is sorting important?
What is tree and its properties?
Write a program to insert an element and in the specific position in the array?
What is the best time complexity of bubble sort?
Explain quick sort and merge sort algorithms and derive the time-constraint relation for these.
Write the importance of hashing?
Can we add heterogeneous elements into treemap?
What is an externalizable interface?
When would you use a hashmap?