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In a stack, if a user tries to remove an element from an empty stack it is called _________

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In a stack, if a user tries to remove an element from an empty stack it is called _________

(a) Underflow

(b) Empty collection

(c) Overflow

(d) Garbage Collection

The above asked question is from Stack Operations topic in section Abstract Data Types of Data Structures & Algorithms I

This question was addressed to me in a job interview.

1 Answer

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Best answer
Right choice is (a) Underflow

The best I can explain: Underflow occurs when the user performs a pop operation on an empty stack. Overflow occurs when the stack is full and the user performs a push operation. Garbage Collection is used to recover the memory occupied by objects that are no longer used.

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