How can you check the amount of used and available RAM on a QRadar appliance?

Question

Options

• Afree
• Btopmem
• Cramstat
• Dmemoryfree

• A
  85% (22)
• B
  4% (1)
• C
  4% (1)
• D
  8% (2)

Explanation

free is the correct command because it is a standard Linux utility that displays the total, used, and available physical memory (RAM) and swap space - and QRadar appliances run on Red Hat Enterprise Linux, making standard Linux commands applicable.

Why the distractors are wrong:

• B. topmem - not a real Linux command; a fabricated distractor.
• C. ramstat - also not a real command; does not exist in standard Linux distributions or QRadar.
• D. memoryfree - similarly invented; no such utility exists.

Memory tip: Think "free RAM = free command." The command name literally describes what you're checking - how much memory is free. If you forget the exact flags, free -h gives human-readable output (MB/GB), which is the most practical form you'll use on any Linux-based appliance including QRadar.

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