What is the PRIMARY purpose of a digital signature?
A digital signature gives integrity, sender authentication and non-repudiation. It doesn’t encrypt the content, so it gives no confidentiality.
Learn more: Digital signature
Question of the day
One exam-style question a day for each exam, with the answer explained. New questions every day at midnight UTC. 25 October 2026
Which is NOT one of the five components of COSO’s Internal Control framework?
The five are control environment, risk assessment, control activities, information and communication, and monitoring activities.
Learn more: COSO Internal Control framework
Why must test data be kept separate from training data?
If the model has seen the test data, results look better than real-world performance will be.
Learn more: Training, validation and test data
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