10 Questions
What is a common disadvantage of recursive methods as outlined in the text?
Memory efficiency
Why can recursion be slow if not implemented correctly?
Overloading the stack with recursive calls
What is the purpose of the stack access method isEmpty()?
To check if the stack is empty
In the context of the TOWNS stack, why is the isEmpty() method important?
To prevent stack underflow errors
Why might a recursive function be difficult to analyze or understand?
Complexity in paradigm
What is a potential consequence of recursion being memory-intensive?
Stack underflow errors
How does recursion impact CPU task scheduling?
May lead to inefficient CPU usage
What role does the stack access method isEmpty() play in interrupt handling?
Checks for empty stack conditions
Why does recursion pose challenges in print queue management?
Difficulty in handling multiple print requests simultaneously
How does recursion influence the handling of interrupts?
Increases interrupt latency
Study Notes
Memory Address Register (MAR)
- Holds the address of the current instruction/data that is to be fetched from/transferred to memory.
Applications of Queues in Computing
- Print queue (serving requests on a shared printer) / spooling in printer
- CPU task scheduling
- Handling of interrupts (in the same order as they arrive)
- Buffer for devices like keyboard
- Queues in routers/switches
- Mail queues
- Simulation/computer modelling of physical queues (e.g. customer waiting line in a supermarket queue)
- Handling website traffic/network congestion
- Maintaining playlist in media player
Binary Trees
- Leaf nodes: nodes with no children (e.g. 4, 7, 9 in the given binary tree)
- Preorder traversal: 6, 3, 5, 4, 8, 7, 9
- Resulting binary tree after deletion of the root node:
- Correct root node
- Correct left subtree
- Correct right subtree
Recursive Methods
- Disadvantages:
- Recursion is memory intensive (uses memory to store intermediate arguments and return values)
- Recursion can be slow (if not implemented correctly or with too many recursive calls)
- Difficult to think of the logic of a recursive function
- Hard to construct/analyse/understand the code
Stack Data Structure
- Used in the implementation of recursive methods
- Purpose of the stack access method isEmpty():
- Returns a Boolean value indicating whether the stack is empty
- Used to check if the stack is empty before performing operations
- Prevents performing operations on an empty stack/stack underflow error
Test your knowledge on the purpose of the memory address register in computer science. Questions cover the role of MAR in fetching or transferring data from/to memory. This quiz is based on exam questions with detailed markschemes.
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