एंटीवायरस सॉफ़्टवेयर में रीयल-टाइम सुरक्षा (real-time protection) क्या करती है?

Which of the following is a small piece of software that uses computer networks and security holes to replicate itself?

Which among the following is a type of malicious software (malware)?

Which of the following malware symptoms indicate that your computer may be infected? I. Slow computer performance II. Erratic computer behaviour III. Unexplained data loss IV. Frequent computer crashes