[ Invention & Inventors ]

झारखंड में आयोजित होने वाली JPSC, JSSC, JET, झारखंड पुलिस भर्ती परीक्षा आदि के लिए उपयोगी सामान्य अध्ययन।

[ Invention & Inventors ]

Useful GK for JPSC, JSSC, JET, Jharkhand Police and other exams.
301. USB DRIVE
301.
[A]
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[B]
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[C]
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[D]
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सही उत्तर: Ajay Bhatt (Intel)
व्याख्या: Portable storage device
Correct Answer:
Explanation: Important question.
302. CD ROM
302.
[A]
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[B]
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[C]
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[D]
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सही उत्तर: Sony and Philips
व्याख्या: Optical storage disc
Correct Answer:
Explanation: Important question.
303. DVD
303.
[A]
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[B]
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[C]
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[D]
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सही उत्तर: Sony, Philips, Toshiba
व्याख्या: Digital versatile disc
Correct Answer:
Explanation: Important question.
304. MOBILE PHONE
304.
[A]
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[B]
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[C]
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[D]
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सही उत्तर: Martin Cooper (Motorola)
व्याख्या: First handheld mobile phone
Correct Answer:
Explanation: Important question.
305. SMARTPHONE
305.
[A]
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[B]
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[C]
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[D]
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सही उत्तर: IBM (Simon)
व्याख्या: First smart mobile device
Correct Answer:
Explanation: Important question.
306. LANDLINE TELEPHONE
306.
[A]
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[B]
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[C]
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[D]
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सही उत्तर: Alexander Graham Bell
व्याख्या: Telephone inventor
Correct Answer:
Explanation: Important question.
307. FAX MACHINE
307.
[A]
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[B]
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[C]
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[D]
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सही उत्तर: Alexander Bain
व्याख्या: Document transmission device
Correct Answer:
Explanation: Important question.
308. CCTV CAMERA
308.
[A]
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[B]
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[C]
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[D]
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सही उत्तर: Marie Van Brittan Brown
व्याख्या: First home security camera system
Correct Answer:
Explanation: Important question.
309. BIOMETRIC DEVICE
309.
[A]
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[B]
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[C]
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[D]
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सही उत्तर: Automated security labs
व्याख्या: Fingerprint / face recognition system
Correct Answer:
Explanation: Important question.
310. FIREWALL DEVICE
310.
[A]
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[B]
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[C]
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[D]
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सही उत्तर: Check Point Software
व्याख्या: Network security device
Correct Answer:
Explanation: Important question.