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Questions and Answers

Which data structure follows a last in, first out (LIFO) order?

Queue

Tree

Stack (correct)

List

What are the two primary operations of a stack?

Push and pop (correct)

Insert and delete

Enqueue and dequeue

Add and remove

In a stack, where can a new element be added?

At any index

At the top (correct)

At the bottom

In the middle

Which real-world example represents a stack?

A pile of plates placed on each other (B) Signup and view all the answers

What is the order in which elements are popped from a stack?

Last in, first out (LIFO) (C) Signup and view all the answers

What is the purpose of using a stack in programming?

To store elements sequentially dependent on each other (B) Signup and view all the answers

What must be decided by the programmer when implementing a stack?

The order in which elements are pushed (A) Signup and view all the answers

Which data structure is used when elements need to be stored in a safe manner where it is not desirable to modify them from an arbitrary position such as the middle?

Stack (B) Signup and view all the answers

What property of the stack allows elements to be pushed onto it and then popped when certain specified conditions are met between the top of the stack and the next incoming element?

LIFO property (A) Signup and view all the answers

What is the purpose of using a stack to reverse a string?

To get elements out in the reverse order in which they were inserted (D) Signup and view all the answers

Which real-world problem can be solved using a stack?

Balancing parentheses in a code file (C) Signup and view all the answers

What functionality are stacks commonly used for in editing?

Undo/redo operations (B) Signup and view all the answers

In which situation does a stack facilitate recursive subroutines?

When storing information about the recursion calls (D) Signup and view all the answers

What is the difference between a stack and a queue?

Stack follows LIFO property, while queue follows FIFO property (C) Signup and view all the answers

What is the purpose of using a stack in checking code files?

To balance parentheses in the code file (D) Signup and view all the answers