A Junior Administrator of a Physical Server Receives Log Messages

Multiple Choice

A junior administrator of a physical server receives log messages indicating the out-of-memory killer has been active. All memory slots are in use on the motherboard, but additional disk space is available. Space has been allocated for a swap file. Which of the following should the administrator use to reduce the output of memory messages?

A) free : swapoff / swapfile ; swapon -a
B) mkswap /swapfile; swapon -a
C) fallocate -l 2G /swapfile && swapon -a
D) echo "1" > /proc/meninfo ; swapon / swapfile