general/drills: Add "Database Application" written task as exam

- Add Markdown file storing the question scenario and the questions
- Modify `config.yaml` to render the new task

Signed-off-by: Petru-Vlad Ionescu <[email protected]>

chapters/general/drills/tasks/database-application.md

@@ -0,0 +1,45 @@
+# Database Application
+
+## Scenario
+
+We aim to run a database application in a containerized solution (Docker, Podman) for ease of deployment and isolation.
+Running in a container involves isolating the filesystem (and necessary files), necessary processes, computing resources (CPU, memory, disk), and the network portion.
+The database application will be accessible from outside the container through a virtual network.
+
+Answer the following questions with "True" or "False" and justify the answer.
+Justification should be simple, 2-3 sentences for each answer.
+
+## Questions
+
+1. The database application can only be implemented as a static executable, not a dynamic one.
+Answer: False
+
+1. Within the container, the application will use virtual memory mechanisms.
+Answer: True
+
+1. Within the container, the application can use the `fork()` system call.
+Answer: True
+
+1. The database application can use pipes to communicate outside the container.
+Answer: False
+
+1. Information from the application's filesystem is lost when the container terminates.
+Answer: False
+
+1. The application can be multi-threaded.
+Answer: True
+
+1. For synchronization, the application can only use mutexes, not spinlocks.
+Answer: False
+
+1. Processes within the container do have PIDs.
+Answer: False
+
+1. The application in the container can have buffer overflow vulnerabilities.
+Answer: True
+
+1. Memory within the container cannot be visible from outside the container, even by a privileged account.
+Answer: False
+
+1. The application exclusively spends time in user mode, not in kernel mode.
+Answer: False

config.yaml

@@ -263,6 +263,7 @@ docusaurus:
             - Distributed System/: distributed-system.md
             - Aggregator Application/: aggregator-application.md
             - Benchmarking Application/: benchmarking-application.md
+            - Database Application/: database-application.md
       - Hackathons:
           path: content/assignments
           subsections: