Understanding Scheduling Algorithms

What is the time complexity of Round Robin Scheduling?

• O(n)

• O(log n)

• O(n^2)

• O(1)

Explain the main principle behind Banker's Algorithm.

• The Banker's Algorithm is used to calculate interest rates.

• The Banker's Algorithm prioritizes maximum resource usage.

• The main goal of the Banker's Algorithm is to maximize profit.

• The main principle behind Banker's Algorithm is to ensure safe resource allocation to avoid deadlock.

How does First-Come, First-Served scheduling work?

• Processes are executed based on their priority levels.

• Processes are executed in reverse order of their arrival.

• Processes are executed in random order regardless of arrival time.

• First-Come, First-Served scheduling executes processes in the order they arrive.

What is the Least Recently Used page replacement algorithm?

• The Least Recently Used (LRU) page replacement algorithm replaces the least recently accessed page.

• The LRU algorithm replaces the most recently accessed page.

• The LRU algorithm keeps all pages in memory indefinitely.

• The LRU algorithm randomly replaces any page.

Describe the Shortest Job First scheduling method.

• Shortest Job First (SJF) selects the longest job to reduce overall execution time.

• Shortest Job First (SJF) schedules processes based on their priority level.

• Shortest Job First (SJF) scheduling method selects the process with the smallest execution time to minimize average waiting time.

• Shortest Job First (SJF) method randomly selects processes to execute.

What are the advantages of FCFS Disk Scheduling?

• High throughput and low latency

• Complex implementation and management

• Randomized request processing order

• Advantages of FCFS Disk Scheduling include simplicity, ease of implementation, and predictable request processing order.

How does priority scheduling determine the order of execution?

• All processes are treated equally regardless of priority.

• Execution order is determined randomly.

• Processes are executed in the order they arrive.

• Priority scheduling determines execution order by prioritizing processes based on assigned priority levels.

What is the difference between best fit and worst fit memory allocation?

• Best fit uses a fixed size; worst fit uses a variable size.

• Best fit minimizes wasted space; worst fit maximizes remaining space.

• Best fit allocates the largest block; worst fit allocates the smallest block.

• Best fit is faster than worst fit; worst fit is slower than best fit.

Explain the SCAN disk scheduling algorithm.

• The SCAN algorithm services requests in a circular manner, moving back and forth continuously.

• The SCAN algorithm randomly services requests without a specific direction.

• The SCAN algorithm only services requests that are closest to the current head position.

• The SCAN disk scheduling algorithm services requests in one direction until the end, then reverses direction.

What is the C-SCAN disk scheduling method?

• C-SCAN prioritizes requests based on their size rather than their position on the disk.

• C-SCAN moves in both directions, alternating between them after each request.

• C-SCAN is a method that services requests randomly without any order.

• C-SCAN is a disk scheduling method that services requests in a circular manner, moving in one direction and jumping back to the start after reaching the end.