OS Test 1

If a diskless system downloads the OS at 5 MB/s and the OS image is 250 MB, how long will it take?

• 30 sec
• 45 sec
• 50 sec
• 60 sec

In a multilevel feedback queue scheduling system, what is the main purpose of allowing processes to move between queues?

• To reduce memory fragmentation
• To avoid CPU overload
• To dynamically adjust process priorities for fairness
• To eliminate context switching

Calculate total memory wasted by internal fragmentation for 4 partitions of 512 KB

• 120 KB
• 64 KB
• 128 KB
• 96 KB

A system using LFS writes 5 small files in rapid succession. What performance benefit can be expected compared to a traditional file system?

• Lower memory usage
• Reduced read latency
• Improved sequential write throughput
• Increased file fragmentation

Primary deployment advantage of using containers over virtual machines is:

• Reduced reliability
• Consistent environments
• Dependence on GUI
• Manual resource scaling

Time to load OS = 90 seconds. If OS is compressed to 60% and decompression takes 15 seconds, what's the new boot time?

• 54 sec
• 69 sec
• 60 sec
• 72 sec

If a First-Come, First-Served (FCFS) scheduler is used and the first process in the queue has a very long burst time, what is the expected result?

• High CPU utilization
• Reduced response time
• Convoy effect
• Reduced turnaround time

Analyze the difference in allocation success rate between First Fit and Worst Fit (200 KB process)

• Same
• First Fit better
• Worst Fit better
• None

You have a disk with 1 GB total space and LFS writes in segments of 1 MB each. Assume 60% of each segment becomes obsolete after a few updates.How much effective space will be available for new data after 500 segments are written (ignoring segment cleaning)?

• 200 MB
• 300 MB
• 500 MB
• 100 MB

Storage driver most commonly used by Docker for efficient image layering is:

• ext4
• OverlayFS
• ZFS
• NTFS