तीसरी पीढ़ी के कंप्यूटरों के दौरान निम्नलिखित में से किस आंतरिक प्राथमिक मेमोरी (प्राइमरी मेमोरी) तकनीक की शुरुआत और व्यापक उपयोग किया गया था?

The 'Drain of Wealth' theory was propounded by which Indian nationalist leader?

Which event is considered the turning point in Mahatma Gandhi's leadership in the Indian independence movement?

Which African leader is known for his non-violent opposition to colonial rule?