{"id":18033,"date":"2024-04-15T05:21:02","date_gmt":"2024-04-15T05:21:02","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=18033"},"modified":"2024-04-15T05:21:02","modified_gmt":"2024-04-15T05:21:02","slug":"a-compound-key-a-is-made-up-a-several-pieces-of-information-b-uniquely-identifies-an-item-in-a-list-c-both-a-and-b-d-is-a-combination-of-each-unique-key-e-none-of-the-above","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/a-compound-key-a-is-made-up-a-several-pieces-of-information-b-uniquely-identifies-an-item-in-a-list-c-both-a-and-b-d-is-a-combination-of-each-unique-key-e-none-of-the-above\/","title":{"rendered":"A compound key A. is made up a several pieces of information B. uniquely identifies an item in a list C. both (a) and (b) D. is a combination of each unique key E. None of the above"},"content":{"rendered":"<p>[amp_mcq option1=&#8221;is made up a several pieces of information&#8221; option2=&#8221;uniquely identifies an item in a list&#8221; option3=&#8221;both (a) and (b)&#8221; option4=&#8221;is a combination of each unique key E. None of the above&#8221; correct=&#8221;option3&#8243;]<!--more--><\/p>\n<p>The correct answer is: <strong>C. both (a) and (b)<\/strong><\/p>\n<p>A compound key is a key that is made up of two or more attributes. It is used to uniquely identify a row in a table. For example, in a table of employees, the compound key might be the employee&#8217;s name and ID number.<\/p>\n<p>Option A is correct because a compound key is made up of several pieces of information. Option B is correct because a compound key uniquely identifies an item in a list. Option C is the correct answer because it includes both Option A and Option B. Option D is incorrect because a compound key is not a combination of each unique key. Option E is incorrect because the answer is Option C.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[amp_mcq option1=&#8221;is made up a several pieces of information&#8221; option2=&#8221;uniquely identifies an item in a list&#8221; option3=&#8221;both (a) and (b)&#8221; option4=&#8221;is a combination of each unique key E. None of the above&#8221; correct=&#8221;option3&#8243;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[677],"tags":[],"class_list":["post-18033","post","type-post","status-publish","format-standard","hentry","category-database-systems","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>A compound key A. is made up a several pieces of information B. uniquely identifies an item in a list C. both (a) and (b) D. is a combination of each unique key E. 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None of the above","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/a-compound-key-a-is-made-up-a-several-pieces-of-information-b-uniquely-identifies-an-item-in-a-list-c-both-a-and-b-d-is-a-combination-of-each-unique-key-e-none-of-the-above\/","og_locale":"en_US","og_type":"article","og_title":"A compound key A. is made up a several pieces of information B. uniquely identifies an item in a list C. both (a) and (b) D. is a combination of each unique key E. None of the above","og_description":"[amp_mcq option1=&#8221;is made up a several pieces of information&#8221; option2=&#8221;uniquely identifies an item in a list&#8221; option3=&#8221;both (a) and (b)&#8221; option4=&#8221;is a combination of each unique key E. 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