Kit Library / Computer Science / Data Structures
Quick KitShared by a Veda learner · Generated with Veda AI
Veda Bites are swipeable micro-lessons — each one teaches exactly one idea. Here's a taste from this kit; the app has the full deck.
Last in, first out—the core rule.
A stack is a linear data structure that follows the LIFO (Last-In, First-Out) principle. The most recently added element is the first one to be removed. Think of a stack of plates: you add and remove from the top only.
↳ Stacks enforce LIFO: the last element added is the first removed.
Push, pop, peek—the big three.
↳ Push adds, pop removes, peek inspects—all at the top.
All operations are O(1).
In a well-implemented stack (using an array or linked list), push, pop, and peek all run in O(1) time. This makes stacks extremely efficient for their intended use.
↳ Stack operations are constant-time, O(1).
A stack is a fundamental LIFO data structure supporting push, pop, and peek operations in O(1) time. It is widely used in function calls, expression evaluation, and undo/redo features. Understanding stack operations and...
~8 min · full explanation, examples & memory tricks in the app
19 questions laddered from warm-up to topper-level, each with an explanation. A taste:
Which principle does a stack follow?
BeginnerLast In, First Out (LIFO)
A stack is a LIFO data structure, meaning the last element added is the first to be removed.
Which operation adds an element to the top of a stack?
Beginnerpush
The push operation inserts an element onto the top of the stack.
Which operation removes the top element from a stack?
Beginnerpop
The pop operation removes and returns the top element of the stack.
What does the 'peek' operation do on a stack?
BeginnerReturns the top element without removing it
Peek (or top) returns the top element without modifying the stack.
17 flashcards in this kit — the app reviews them with spaced repetition so the right card returns on the right day.
Every game is built from this kit's own content — scores feed your mastery, so playing counts as studying.
The full Veda Bites deck, complete notes, spaced-repetition flashcards, leveled MCQs, tests and games for this kit — plus Daily Facts and the Arena, every day.
