अपने स्मार्टफोन या टैबलेट को सुरक्षित करने का मूल पहला कदम क्या है?

Which of the following actions is NOT performed by malware?

Deceptive programs that appear to perform one useful function, but secretly perform malicious activities, are known as:

Which of the following can be categorized as malicious software (malware)? I. Spyware II. Keyloggers III. Ransomware IV. Trojan horses