Final test: Inside the system: resources, kernel, processes

Read the output

The tail of a trace of a program that silently exited with status 1. Why did it exit?

$ strace nightsync 2>&1 | tail -n 4
openat(AT_FDCWD, "/etc/nightsync/sync.conf", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
munmap(0x70f90e018000, 16384)           = 0
exit_group(1)                           = ?
+++ exited with 1 +++

• A It failed to free memory — the munmap call.
• B It could not find the settings file /etc/nightsync/sync.conf.
• C A signal killed it.