20EC211-ESIoT (2024-25 ODD) Surprise Quiz I

Name

Roll Number

In an online banking system, which of the following is a foreground task?

• Performing regular maintenance checks on the database
• Allowing a user to log in and check their account balance
• Sending daily transaction summaries to the user’s email
• Updating currency exchange rates in the background

In an autonomous vehicle system, while navigating the road, the system needs to process a sudden obstacle detection. What role does context switching play?

• It pauses the navigation process and switches to obstacle detection for immediate action
• It delays obstacle detection until the navigation is complete.
• It stops all processes and restarts the system.
• It handles both tasks simultaneously without switching.

How do mobile apps benefit from a Preemptive Kernel?

• Apps can run indefinitely without being interrupted
• Apps with higher priority can preempt lower-priority apps, improving responsiveness
• Apps are never terminated by the operating system
• Apps consume less memory

The scheduler's role in an operating system involves:

• Allocating memory to tasks.
• Assigning task priorities.
• Determining the next task to run.
• Managing hardware interrupts.

Select the appropriate condition from the following conditions when Priority inversion occurs

• A high-priority task is indirectly blocked by a lower-priority task.
• Lower-priority tasks receive higher priority.
• A high-priority task preempts a low-priority task.
• Task priorities change dynamically.

What is the average waiting time for FCFS scheduling if the burst times of the processes are 5, 7, and 10 respectively, and they arrive in order?

• 7
• 6
• 9
• 8

Which of the following is a potential consequence of improper mutual exclusion in real-time systems?

• Predictable task execution
• Reduced system load
• Deadline misses due to blocked high-priority tasks
• Better task synchronization

Task A is responsible for reading temperature from a sensor and updating a display, while Task B reads user input from a keypad. Both tasks update the display. What type of semaphore is needed to ensure proper synchronization between the tasks?

• Counting Semaphore
• Binary Semaphore
• Mutex
• Timed Semaphore