Stack
Jharkhand Board · Class 12 · Computer Science
Most important questions from Stack for Jharkhand Board Class 12 Computer Science board exam 2026. MCQs, short answer, and long answer questions with marks.
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Which of the following are real-life examples of stack?
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Pile of books, Stack of plates, Bangles on wrist
Pile of books, stack of plates, and bangles on wrist follow LIFO principle - you add/remove from the top. Queue at movie theater follows FIFO, and traffic signal is not a stack example.
Which expression notation places operators between operands?
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Infix
Infix notation places operators between operands (like x + y). Prefix places operators before operands, and postfix places operators after operands.
What is the postfix notation for the infix expression 'A + B'?
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A B +
In postfix notation, operators come after their operands. So 'A + B' becomes 'A B +' where both operands A and B are followed by the operator +.
Which of the following are applications of stack in programming?
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Undo/Redo operations, Browser back button, Reversing a string
Stack is used in undo/redo operations, browser back button functionality, and string reversal because they all follow LIFO principle. Sorting and finding maximum don't typically use stack data structure.
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