[解説ï¼English]
Which of the following is performed periodically to prevent a decline
in the access efficiency of a database?
a) Backup
b) Database dump
c) Reorganization
d) Rollback
Google 翻訳(ä¸é¨è¨æ£)
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bï¼ãã¼ã¿ãã¼ã¹ãã³ã
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â ãã¼ã¯ã¼ãâ
â 解çâ
Fundamental IT Engineer Examination (Morning) Q2 2021 Q.26
c) Reorganization
> ãã¼ã¿ãã¼ã¹ã®åç·¨æ(Database reorganization)
> ãã¼ã¿ãã¼ã¹ã®åç·¨æã¯ï¼ãã¼ã¿ãã¼ã¹ã«ãªãã¸ã§ã¯ãã®è¿½å ãåé¤ããã
> ãã¨ã«ãã£ã¦çãããã¼ã¿ãã¼ã¹ã®é
ç½®ã®ä¹±ããç´ãï¼é©åãªé
ç½®ã«ãã¾ãã
> ããã«ãã£ã¦ï¼ãªãã¸ã§ã¯ãã®ã¢ã¯ã»ã¹æ§è½ãåä¸ãï¼ãã¼ã¿ãã¼ã¹ã®
> ã¹ãã¼ã¹å¹çãæé©ã«ãªãã¾ãã
> https://itpfdoc.hitachi.co.jp/manuals/3000/3000347520/osex0040.htm
>
> I think the answer is c).
ãã©ãããããã¨ããããã¾ãã
> a) Backup
> https://oss-db.jp/dojo/dojo_04
> b) Database dump
> https://qiita.com/ryuuuuuuuuuu/items/c8f4525036e29d77be28
> c) Reorganization
> https://itpfdoc.hitachi.co.jp/manuals/3000/3000347520/osex0040.htm
> d) Rollback
> https://medium-company.com/rollback/
> From above,I think the answer is c).
> Reference
> https://www.fe-siken.com/kakomon/26_aki/q29.html
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[解説ï¼ã»ãã¥ãªãã£ç³»]
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â ãã¼ã¯ã¼ãâ ãã¢ã¯ã»ã¹å¶å¾¡
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å ±ã»ãã¥ãªãã£ããã¸ã¡ã³ãåå令åï¼ï¼å¹´ç§åï¼ï¼
ãã¤ããã¼ã¿ã«é¢ããã¢ã¯ã»ã¹å¶å¾¡ã®ç®¡çè¦ç¨ãé²è¦§ããã
> ã·ã¹ãã ç£æ»äººã®æ¥å
> ã·ã¹ãã ç£æ»äººã¯ãç£æ»å¯¾è±¡ã®ä¼æ¥ã管çãããã·ã¹ãã ãã«å¯¾ãã¦ã
> ãªã¹ã¯ã³ã³ããã¼ã«ãé©æ£ã«ãããªããã¦ãããã第ä¸è
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> ãã¾ãã
> https://it-sukima.com/management-220413-2/#i-4
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> ã·ã¹ãã ç£æ»äºº
> https://www.meti.go.jp/policy/netsecurity/downloadfiles/system_kansa_h30.pdf
> ä¸è¨ããããã¼ã¿ã«é¢ããã¢ã¯ã»ã¹å¶å¾¡ã®ç®¡çè¦ç¨ãé²è¦§ã該å½ãã¾ãã
> ãã£ã¦ã解çã¯ã¤ã§ãã
> åè
> https://www.fe-siken.com/kakomon/30_haru/q58.html
> ã·ã¹ãã ç£æ»äººã¯ãä½æ¥ãããã«è³æã®ç¢ºèªã ãã§ãã
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> https://www.fe-siken.com/kakomon/01_aki/q60.html
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[解説ï¼å ¥é]ITãã¹åã
ããã製åã®ä»æã®å£²ä¸é«ã¨è²»ç¨ã¯è¡¨ã®ã¨ããã§ãã£ãã 販売å価ã1ï¼000åãã800
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ãããããã§ï¼åºå®è²»åã³è£½å1åå½ããã®å¤åè²»ã¯å¤åããªããã®ã¨ããã
売ä¸é« ããã2ï¼000ï¼000å
販売å価 ãããã 1ï¼000å
販売åæ° ãããã 2ï¼000å
---------------------------
åºå®è²» ãããã 600ï¼000å
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1åå½ããã®å¤åè²»ãã700å
ãã¢ã2ï¼400
ãã¤ã2ï¼500
ãã¦ã4ï¼800
ãã¨ã6ï¼000
â ãã¼ã¯ã¼ãâ ã
â 解çâ
ããITãã¹ãã¼ã令åï¼ï¼å¹´æ¥åï¼ï¼
ãã¨ã6ï¼000
> æçåå²ç¹(Break Even Point/BEP)売ä¸é«ã®å
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> æçåå²ç¹å£²ä¸é« = åºå®è²»/(1 - å¤åè²»/売ä¸é«)
> https://www.hrbrain.jp/media/human-resources-management/break-even-point
> 600,000/(1 - 700/800) = 600,000/(1 - 7/8) = 600,000/(1/8) = 4,800,000å
> 4,800,000/800 = 6,000å -----(ã¨)
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> 解çã¨ãã¦ãæ±ãããã¦ããåæ°ã ï½ åã¨ãã¦å³å¼åããã¨
>
> ã売 ä¸ é«ããã 800 ï½åï¼â 販売åä¾¡ï¼ 800å à ï½åï¼
> â²å¤ å è²»ããã 700 ï½å
> ---------------------------
> ãéçå©çããã 100 ï½å
> â²åº å® è²»ãã 600ï¼000 å
> ---------------------------
> ãæä½ç¢ºä¿ã®å©çããã 0å
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> ãã£ã¦ã100ï½ ï¼ 600ï¼000 ï¼ 0
> ãããã100ï½ ï¼ 600ï¼000 ãã
> ããããããï½ ï¼ 6ã000 ï¼åï¼
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> æçåå²ç¹å£²ä¸é« ï¼ åºå®è²» / ( 1 ï¼ å¤åè²»ç)
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> è²©å£²ä¾¡æ ¼ãä¸ãã£ã¦ã1åå½ããã®å¤åè²»ã¯å¤åããªãã¨ããã®ã§ã販売å価ã800åã
> 1åå½ããã®å¤åè²»ã700åã§ãå¤åè²»çã¯ã700 / 800ï¼7 / 8ãã¨ãªãã¾ãã
> å
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> ã600,000å / ( 1 ï¼ (7/8) )ï¼600,000å / (1/8) ï¼ 4,800,000å
> 1å800åã®è£½åã売ã£ã¦ã4,800,000åã®å£²ä¸é«ãå¾ãããã«
> å¿
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> ã4,800,000å / 800åï¼6,000å
> ãããã£ã¦ãã¨ããæ£è§£ã§ãã
> å¼ç¨
> https://www.itpassportsiken.com/kakomon/05_haru/q13.html
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