OS Test 3

A desktop processor runs at 3.5 GHz. Each instruction takes 2 cycles. What is max instruction throughput?

• 1.75 billion/sec
• 2 billion/sec
• 3.5 billion/sec
• 7 billion/sec

In a system using First-Come, First-Served scheduling, which of the following situations is most likely to result in a high average waiting time?

• All processes have the same burst time
• Short processes arrive after long ones
• Processes arrive in increasing order of burst time
• All processes arrive at the same time

Devise a swapping schedule for 4 processes with varying priorities

• Priority-based
• FIFO
• Round-robin
• Random

Given a choice between LFS and ext4 for a write-heavy IoT system with flash storage, which is the better choice and why?

• ext4, because it has journaling
• FS, due to efficient sequential writes on flash
• ext4, for better directory structures
• LFS, because it reduces file read latency

Purpose of executing podman run on a Linux system is to:

• Display running pods
• Launch a new container
• Remove container
• Export logs

A desktop boots in 30 seconds. A mainframe takes 5 minutes. What's the % time difference?

• 9
• 10
• 11
• 7

A process completes its CPU burst and enters the waiting state for I/O. What happens to this process in terms of scheduling?

• It is removed from the system
• It returns to the Ready Queue immediately
• It waits in the I/O Queue until it's ready
• It preempts another process currently running

How many processes can be swapped in 1 GB memory if each process needs 256 MB?

• 4
• 2
• 3
• 5

You are using Btrfs and take a snapshot of a 1 GB subvolume. You then modify 100 MB of data.How much additional disk space is consumed after the modification?

• 100 MB
• 1 GB
• 900 MB
• 2 GB

Linux utility used to view real-time process and memory usage statistics:

• netstat
• top
• chmod
• df