Podcast
Questions and Answers
Which operation is used to add a new node to a linked list?
Which operation is used to add a new node to a linked list?
- Deletion
- Insertion (correct)
- Traversal
- Dequeue
Inserting a node at the last position in a linked list involves pointing the last node's next pointer to the new node.
Inserting a node at the last position in a linked list involves pointing the last node's next pointer to the new node.
True (A)
What are the three types of insertion in a linked list?
What are the three types of insertion in a linked list?
Inserting at first, inserting at last, inserting at mid
In the function insertFirst, if the head is NULL, the new node becomes the ______.
In the function insertFirst, if the head is NULL, the new node becomes the ______.
Match the types of insertion with their descriptions:
Match the types of insertion with their descriptions:
What happens if the position specified for deletion is greater than the size of the linked list?
What happens if the position specified for deletion is greater than the size of the linked list?
The search function will return the position of the value if it is not found in the linked list.
The search function will return the position of the value if it is not found in the linked list.
In which scenario does a linked list facilitate adding new contacts in a phonebook?
In which scenario does a linked list facilitate adding new contacts in a phonebook?
To delete a node from a linked list, we must first access the ______ node.
To delete a node from a linked list, we must first access the ______ node.
Match each application of linked lists with its appropriate description:
Match each application of linked lists with its appropriate description:
What happens if the head of the list is NULL when inserting a node at the end?
What happens if the head of the list is NULL when inserting a node at the end?
The insertAtPos function allows insertion at any position in the linked list.
The insertAtPos function allows insertion at any position in the linked list.
What is the purpose of the 'prev' pointer in the insertion at position operation?
What is the purpose of the 'prev' pointer in the insertion at position operation?
In the deletion process, we update the next pointer of the previous node to point to the ______ node of the target node.
In the deletion process, we update the next pointer of the previous node to point to the ______ node of the target node.
Match the following operations with their descriptions:
Match the following operations with their descriptions:
What happens in the insertAtPos function if the position specified is greater than the current size of the list?
What happens in the insertAtPos function if the position specified is greater than the current size of the list?
The next pointer of the new node remains NULL after it is inserted at the end.
The next pointer of the new node remains NULL after it is inserted at the end.
What is the first step in the deletion process in a linked list?
What is the first step in the deletion process in a linked list?
What does the enqueue function do in the provided code?
What does the enqueue function do in the provided code?
The dequeue function will always return the last element added to the queue.
The dequeue function will always return the last element added to the queue.
What happens to the rear pointer when the queue becomes empty after a dequeue operation?
What happens to the rear pointer when the queue becomes empty after a dequeue operation?
In the peek function, the value returned is the ______ of the front node.
In the peek function, the value returned is the ______ of the front node.
Match each function with its purpose:
Match each function with its purpose:
What is the primary purpose of the 'enqueue' function in the provided code?
What is the primary purpose of the 'enqueue' function in the provided code?
The 'peek' function returns the data of the rear node of the queue.
The 'peek' function returns the data of the rear node of the queue.
In the 'dequeue' function, if the front pointer becomes NULL, the ______ pointer should also be set to NULL.
In the 'dequeue' function, if the front pointer becomes NULL, the ______ pointer should also be set to NULL.
Match the functions with their respective purposes:
Match the functions with their respective purposes:
What is the first action taken when the reading symbol is an operand?
What is the first action taken when the reading symbol is an operand?
A right parenthesis ')' is pushed onto the stack during infix to postfix conversion.
A right parenthesis ')' is pushed onto the stack during infix to postfix conversion.
What should be done when a left parenthesis '(' is encountered?
What should be done when a left parenthesis '(' is encountered?
When an operator is read, if it has ______ precedence than the top of the stack's operator, pop the stack.
When an operator is read, if it has ______ precedence than the top of the stack's operator, pop the stack.
Match the following symbols with their corresponding actions:
Match the following symbols with their corresponding actions:
What does the 'pop' operation do in a stack?
What does the 'pop' operation do in a stack?
In the expression (A+B)*(C-D), what is the resultant postfix notation?
In the expression (A+B)*(C-D), what is the resultant postfix notation?
During the conversion process, numbers must always be popped from the stack before they can be printed.
During the conversion process, numbers must always be popped from the stack before they can be printed.
Items in a stack are removed in the order they were inserted.
Items in a stack are removed in the order they were inserted.
What is the purpose of the 'push' operation in a stack?
What is the purpose of the 'push' operation in a stack?
What happens when a right parenthesis ')' is encountered in the conversion process?
What happens when a right parenthesis ')' is encountered in the conversion process?
In a stack, if the top is set to -1, it indicates that the stack is ______.
In a stack, if the top is set to -1, it indicates that the stack is ______.
In the expression 10 + 2 * 8 - 3, the first action is to output the number ______.
In the expression 10 + 2 * 8 - 3, the first action is to output the number ______.
Match the stack operations with their descriptions:
Match the stack operations with their descriptions:
When processing the expression 10 + 2 * 8 - 3, what happens after encountering the second operator '*', given that + is on the stack?
When processing the expression 10 + 2 * 8 - 3, what happens after encountering the second operator '*', given that + is on the stack?
Which of the following correctly describes the Last-In, First-Out (LIFO) principle?
Which of the following correctly describes the Last-In, First-Out (LIFO) principle?
A stack can be implemented using a linked list only.
A stack can be implemented using a linked list only.
What happens to the 'top' variable when an element is pushed onto a stack?
What happens to the 'top' variable when an element is pushed onto a stack?
The function used to return the element at the top of the stack without removing it is called ______.
The function used to return the element at the top of the stack without removing it is called ______.
What is the primary role of the 'size' operation in a stack?
What is the primary role of the 'size' operation in a stack?
Which operation removes the top element from a stack implemented using a linked list?
Which operation removes the top element from a stack implemented using a linked list?
The push operation adds an element to the end of the linked list.
The push operation adds an element to the end of the linked list.
What data structure is used to implement a stack as described?
What data structure is used to implement a stack as described?
To reverse a string using a stack, we push each character into the stack and then ______ them.
To reverse a string using a stack, we push each character into the stack and then ______ them.
Match the stack operation with its description:
Match the stack operation with its description:
What is the main application of a stack in browsers?
What is the main application of a stack in browsers?
The top of a stack implemented with a linked list is always NULL when it is empty.
The top of a stack implemented with a linked list is always NULL when it is empty.
In the context of stack operations, what does 'top' refer to?
In the context of stack operations, what does 'top' refer to?
When an element is popped from the stack, the top pointer moves to the ______ element.
When an element is popped from the stack, the top pointer moves to the ______ element.
Which of the following actions is not an application of stacks?
Which of the following actions is not an application of stacks?
What is the final result after evaluating the postfix expression 7 4 -3 * 1 5 + / *?
What is the final result after evaluating the postfix expression 7 4 -3 * 1 5 + / *?
Postfix notation requires parentheses to indicate the order of operations.
Postfix notation requires parentheses to indicate the order of operations.
What is the purpose of the stack in evaluating a postfix expression?
What is the purpose of the stack in evaluating a postfix expression?
When the expression evaluation is complete, the number in the stack is the ______ answer.
When the expression evaluation is complete, the number in the stack is the ______ answer.
Match the following operations with their results after evaluating the expression:
Match the following operations with their results after evaluating the expression:
In the postfix expression evaluation process, what happens if the element is an operator?
In the postfix expression evaluation process, what happens if the element is an operator?
To convert an infix expression to postfix, numbers are outputted immediately as they are scanned.
To convert an infix expression to postfix, numbers are outputted immediately as they are scanned.
How do you begin evaluating a postfix expression?
How do you begin evaluating a postfix expression?
When the postfix expression is completely evaluated, the ______ in the stack represents the final result.
When the postfix expression is completely evaluated, the ______ in the stack represents the final result.
Match the postfix expression with its corresponding evaluation steps:
Match the postfix expression with its corresponding evaluation steps:
What does the 'peek' operation in a stack do?
What does the 'peek' operation in a stack do?
In a stack, the Last-In, First-Out (LIFO) principle means that the first element added is the first element removed.
In a stack, the Last-In, First-Out (LIFO) principle means that the first element added is the first element removed.
What happens when you call the 'pop' operation on a stack?
What happens when you call the 'pop' operation on a stack?
In stack implementations using arrays, the variable 'top' indicates the ______ element of the stack.
In stack implementations using arrays, the variable 'top' indicates the ______ element of the stack.
Match the following stack operations with their descriptions:
Match the following stack operations with their descriptions:
Which operation would you use to check if a stack is empty?
Which operation would you use to check if a stack is empty?
It is possible to add elements to both ends of a stack.
It is possible to add elements to both ends of a stack.
What is the consequence of attempting to pop an element from an empty stack?
What is the consequence of attempting to pop an element from an empty stack?
Which of the following operations removes the top element from a stack?
Which of the following operations removes the top element from a stack?
In a stack implementation using a linked list, the top pointer points to the last element added to the stack.
In a stack implementation using a linked list, the top pointer points to the last element added to the stack.
What does the push operation do in a stack implemented with a linked list?
What does the push operation do in a stack implemented with a linked list?
The stack operation that adds an element at the beginning of the list is called ______.
The stack operation that adds an element at the beginning of the list is called ______.
Match the following stack operations with their corresponding descriptions:
Match the following stack operations with their corresponding descriptions:
What is one application of stacks?
What is one application of stacks?
In a linked list stack, if the top is NULL, the stack is considered empty.
In a linked list stack, if the top is NULL, the stack is considered empty.
In the context of reversing a string using a stack, what is the order of operations?
In the context of reversing a string using a stack, what is the order of operations?
What action is taken when a right parenthesis ')' is encountered during infix to postfix conversion?
What action is taken when a right parenthesis ')' is encountered during infix to postfix conversion?
An operator is pushed onto the stack without checking its precedence first.
An operator is pushed onto the stack without checking its precedence first.
Which notation is used to express the resultant of the expression (A+B)*(C-D)?
Which notation is used to express the resultant of the expression (A+B)*(C-D)?
In the expression 10 + 2 * 8 - 3, the first output is the number _____ .
In the expression 10 + 2 * 8 - 3, the first output is the number _____ .
What happens when an operator with higher precedence than the stack's top operator is read?
What happens when an operator with higher precedence than the stack's top operator is read?
An operand is printed immediately upon being read.
An operand is printed immediately upon being read.
What is the purpose of popping the stack when encountering an operator?
What is the purpose of popping the stack when encountering an operator?
What is the first step in evaluating a postfix expression?
What is the first step in evaluating a postfix expression?
In a postfix expression, operands are evaluated right after being scanned.
In a postfix expression, operands are evaluated right after being scanned.
What is the final output of evaluating the postfix expression '7 4 -3 * 1 5 + / *'?
What is the final output of evaluating the postfix expression '7 4 -3 * 1 5 + / *'?
When the expression is ended, we pop all the ______ in the stack for the final output.
When the expression is ended, we pop all the ______ in the stack for the final output.
Match the following expressions with their evaluations:
Match the following expressions with their evaluations:
In postfix evaluation, operators are evaluated before operands are popped from the stack.
In postfix evaluation, operators are evaluated before operands are popped from the stack.
What remains on the stack after all operators are popped and the expression is ended?
What remains on the stack after all operators are popped and the expression is ended?
When processing the expression '10 + 2 * 8 - 3', the result after outputting '10 2 8 * +' is _____
When processing the expression '10 + 2 * 8 - 3', the result after outputting '10 2 8 * +' is _____
Match the following postfix expressions with their results:
Match the following postfix expressions with their results:
What happens when a right parenthesis ')' is encountered during infix to postfix conversion?
What happens when a right parenthesis ')' is encountered during infix to postfix conversion?
The '+' operator has higher precedence than the '*' operator.
The '+' operator has higher precedence than the '*' operator.
What is the resultant postfix of the expression (A + B) * (C - D)?
What is the resultant postfix of the expression (A + B) * (C - D)?
When an operand is read during conversion, it is ______ to the result.
When an operand is read during conversion, it is ______ to the result.
Match the following operators with their precedence levels (1 for lowest, 3 for highest):
Match the following operators with their precedence levels (1 for lowest, 3 for highest):
In the expression 10 + 2 * 8 - 3, which number is outputted first?
In the expression 10 + 2 * 8 - 3, which number is outputted first?
Operators are always pushed onto the stack without checking their precedence.
Operators are always pushed onto the stack without checking their precedence.
What does the algorithm do when it reads a left parenthesis '('?
What does the algorithm do when it reads a left parenthesis '('?
What is the time complexity of the push operation in a stack implemented using a linked list?
What is the time complexity of the push operation in a stack implemented using a linked list?
Popping an element from a stack removes the last element that was added to it.
Popping an element from a stack removes the last element that was added to it.
What is the purpose of the 'top' pointer in stack implementation using a linked list?
What is the purpose of the 'top' pointer in stack implementation using a linked list?
During the push operation, if the stack is empty (top is ______), the new node becomes the top of the stack.
During the push operation, if the stack is empty (top is ______), the new node becomes the top of the stack.
Match the stack operations with their respective descriptions:
Match the stack operations with their respective descriptions:
Which of the following is a common application of stacks?
Which of the following is a common application of stacks?
What is the result of popping elements from a stack that contains the elements 11, 22, and 33 (top to bottom)?
What is the result of popping elements from a stack that contains the elements 11, 22, and 33 (top to bottom)?
Stacks can be used to track the pages visited in a web browser tab.
Stacks can be used to track the pages visited in a web browser tab.
What is the primary function of the 'peek' operation in a stack?
What is the primary function of the 'peek' operation in a stack?
In a stack, the operation to remove an element is called 'push'.
In a stack, the operation to remove an element is called 'push'.
What does the 'isEmpty' operation determine in a stack?
What does the 'isEmpty' operation determine in a stack?
In a stack implemented using an array, if the stack is empty, the top is set to ______.
In a stack implemented using an array, if the stack is empty, the top is set to ______.
Match the stack operations with their correct descriptions:
Match the stack operations with their correct descriptions:
Which statement describes the Last-In, First-Out (LIFO) principle?
Which statement describes the Last-In, First-Out (LIFO) principle?
In a stack implementation, the 'top' variable is always set to the size of the stack.
In a stack implementation, the 'top' variable is always set to the size of the stack.
What occurs when an element is pushed onto a stack?
What occurs when an element is pushed onto a stack?
Flashcards
Linked List Insertion
Linked List Insertion
Adding a new node to a linked list at various positions (first, last, or middle).
Insertion at first (prepend)
Insertion at first (prepend)
Adding a new node to the beginning of a linked list.
Insertion at last (append)
Insertion at last (append)
Adding a new node to the end of a linked list.
Linked List Size
Linked List Size
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Linked List Node
Linked List Node
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Linked List Deletion
Linked List Deletion
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Linked List Searching
Linked List Searching
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Linked List Head
Linked List Head
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Uses of Linked Lists
Uses of Linked Lists
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Linked List Position
Linked List Position
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Insert at Last
Insert at Last
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Insert at Position
Insert at Position
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Insertion, Position 1
Insertion, Position 1
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Insertion, Last Position
Insertion, Last Position
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Deletion of Node
Deletion of Node
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Linked List
Linked List
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Node
Node
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Linked List Traversal
Linked List Traversal
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Queue Peek
Queue Peek
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Queue Enqueue
Queue Enqueue
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Queue Dequeue
Queue Dequeue
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Queue Front
Queue Front
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Queue Rear
Queue Rear
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Stack: LIFO
Stack: LIFO
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Stack: Operations
Stack: Operations
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Stack: Push
Stack: Push
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Stack: Pop
Stack: Pop
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Stack: Peek
Stack: Peek
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Stack: isEmpty
Stack: isEmpty
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Stack: Size
Stack: Size
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Stack: Array Implementation
Stack: Array Implementation
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Stack: Array Implementation: Push
Stack: Array Implementation: Push
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Stack: Array Implementation: Pop
Stack: Array Implementation: Pop
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Infix to Postfix
Infix to Postfix
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Postfix Evaluation Steps
Postfix Evaluation Steps
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Postfix Expression
Postfix Expression
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Operand
Operand
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Operator
Operator
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Stack
Stack
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Push (Stack)
Push (Stack)
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Pop (Stack)
Pop (Stack)
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Postfix Expression Evaluation
Postfix Expression Evaluation
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Infix to Postfix Conversion
Infix to Postfix Conversion
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Precedence
Precedence
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Left Parenthesis '(', Right Parenthesis ')'
Left Parenthesis '(', Right Parenthesis ')'
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Push
Push
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Postfix Notation (Reverse Polish Notation)
Postfix Notation (Reverse Polish Notation)
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Infix Notation
Infix Notation
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Stack Implementation using Linked List?
Stack Implementation using Linked List?
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Push in Stack Implementation
Push in Stack Implementation
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Pop in Stack Implementation
Pop in Stack Implementation
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Stack's Top Node
Stack's Top Node
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Reversing Strings using Stack
Reversing Strings using Stack
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Motivation: Stack Applications
Motivation: Stack Applications
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Stack: Last-In, First-Out (LIFO)
Stack: Last-In, First-Out (LIFO)
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Stack: Insert and Remove from Top
Stack: Insert and Remove from Top
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Advantages of Stack Implementation with Linked Lists
Advantages of Stack Implementation with Linked Lists
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Stack Implementation
Stack Implementation
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Array Implementation
Array Implementation
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Linked List Implementation
Linked List Implementation
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Stack Overflow
Stack Overflow
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Push Operation
Push Operation
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Pop Operation
Pop Operation
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Stack Applications
Stack Applications
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What does 'top' represent?
What does 'top' represent?
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Why use a linked list for stack implementation?
Why use a linked list for stack implementation?
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What are the advantages of using Linked List for stack implementation?
What are the advantages of using Linked List for stack implementation?
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Parentheses in Conversion
Parentheses in Conversion
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Conversion Algorithm
Conversion Algorithm
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Result Postfix Expression
Result Postfix Expression
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Stack: Push and Pop
Stack: Push and Pop
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Evaluate Postfix Expression: Steps
Evaluate Postfix Expression: Steps
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Stack: Linked List Implementation
Stack: Linked List Implementation
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Stack: Linked List Implementation (Push)
Stack: Linked List Implementation (Push)
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Stack: Linked List Implementation (Pop)
Stack: Linked List Implementation (Pop)
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Linked List Stack
Linked List Stack
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Push Operation (Linked List Stack)
Push Operation (Linked List Stack)
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Pop Operation (Linked List Stack)
Pop Operation (Linked List Stack)
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Reversing a String using a Stack
Reversing a String using a Stack
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Postfix Evaluation
Postfix Evaluation
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Operator Precedence
Operator Precedence
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Stack (in Postfix Evaluation)
Stack (in Postfix Evaluation)
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Stack in Conversion
Stack in Conversion
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Operator Handling
Operator Handling
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Study Notes
Pointers to Structures
- Structures group related data
- Pointers hold memory addresses
- Pointers allow accessing struct members
Linked Lists
- Linear data structure
- Nodes contain data and a pointer to the next node
- Nodes link together sequentially
- Each node stores data
- Each node stores a reference to the next node
- Head pointer refers to the first node
- Last node points to NULL
Creating a Linked List
- No need to specify initial size
- New nodes added when needed
Traversal
- Pointer to the initial node, a current node pointer
- Loop structure to find the last node
Size
- Counter initialized to zero (
count = 0) - Traversal through each node
- Increments counter (
count++) - Function returns final counter value
Insertion
- Inserting new nodes in the list
- Three Insertion methods
- Inserting at first
- Inserting at last
- Inserting at middle (within the list)
Insertion at First (Prepend)
- Point a new node towards the first node (existing head).
- Update the head pointer to point to the newly created node
Insertion at Last (Append)
- Find the last node in the linked list
- Point the last node's pointer to the new node
Insertion at Position
- Traverse until reaching the target position for insertion
- Identify the node before and after the target position for updating pointers
- Update pointers accordingly
Deletion
- Find the nodes before and after the target node
- Update the pointer of the preceding node to the following node
- Remove (delete) the unwanted node
Searching
- Initial pointer to the first node in the list
- Loop to search within the linked list
- Function returns position if found, otherwise it returns -1
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Description
Explore the essential concepts of pointers and linked lists in data structures. This quiz covers topics such as node creation, traversal techniques, and various insertion methods. Test your understanding of how pointers interact with structures and the fundamentals of linked lists.
