Computer · Internet Security
यह सत्यापित करने के लिए कि उपयोगकर्ता मानव है न कि कोई स्वचालित मशीन, इंटरनेट पर उपयोग किए जाने वाले चैलेंज-रिस्पॉन्स टेस्ट को ______ कहा जाता है।
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