From 0 to 1 Data Structures & Algorithms in Java - Building A Stack Using Java

The video tutorial covers the implementation of a stack using a linked list in Java, emphasizing the use of generics for flexibility. It explains stack operations like push, pop, and peek, and discusses handling exceptions such as stack overflow and underflow. The tutorial also analyzes the performance and complexity of stack operations, highlighting the benefits of using a size variable for constant time complexity. Finally, it explores real-world applications of stacks, including undo functionality, web browser navigation, recursion, and expression evaluation.

What is the primary data structure used to implement a stack in this tutorial?

• Array

• Hash Table

• Binary Tree

• Linked List

Why are generics used in the implementation of a stack?

• To simplify the code

• To increase the speed of operations

• To allow the stack to store any data type

• To reduce memory usage

What exception is thrown when trying to pop from an empty stack?

• IllegalArgumentException

• StackUnderflowException

• StackOverflowException

• NullPointerException

What is the purpose of the 'size' variable in the stack implementation?

• To store the top element of the stack

• To track the number of elements in the stack

• To store the maximum size of the stack

• To keep a backup of the stack

Which stack operation is used to view the top element without removing it?

• Insert

• Push

• Pop

• Peek

What is the time complexity of the push operation in a stack implemented with a linked list?

• O(n)

• O(n^2)

• O(log n)

• O(1)

How does a stack help in implementing the undo feature in applications?

• By reversing the order of operations

• By storing each operation in a stack and popping the last one to undo

• By keeping a log of all changes

• By storing all operations in a queue

In what way is a stack used in web browsers?

• To store cookies

• To manage bookmarks

• To implement the back button functionality

• To load web pages faster

What is the role of a stack in recursion?

• To convert recursion into iteration

• To manage the memory for local variables and function calls

• To store the results of recursive calls

• To optimize the recursive algorithm

Why is infix notation converted to postfix in programming languages?

• To reduce the number of operations

• To simplify the syntax

• To make expressions easier to read

• To evaluate expressions using a stack