{"id":4405,"date":"2024-02-14T12:38:35","date_gmt":"2024-02-14T07:08:35","guid":{"rendered":"https:\/\/cbsepython.in\/database-concepts-quiz-class-12\/"},"modified":"2024-02-19T22:50:47","modified_gmt":"2024-02-19T17:20:47","slug":"database-concepts-quiz-class-12","status":"publish","type":"post","link":"https:\/\/cbsepython.in\/database-concepts-quiz-class-12\/","title":{"rendered":"Database concepts Quiz Class 12"},"content":{"rendered":"<h3>Database concepts Quiz Class 12<\/h3>\n<p>Here&#8217;s a 15-question quiz based on the topics &#8220;<strong>Database Concepts<\/strong>: Introduction to Database Concepts and its Need&#8221; and &#8220;Relational Data Model: Relation, Attribute, Tuple, Domain, Degree, Cardinality, Keys (Candidate Key, Primary Key, Alternate Key, Foreign Key)&#8221;<\/p>\n<div id=\"watu_quiz\" class=\"quiz-area single-page-quiz\">\n<form action=\"\" method=\"post\" class=\"quiz-form \" id=\"quiz-30\" >\n<div class='watu-question' id='question-1'><div class='question-content'><p><span class='watu_num'>1. <\/span>What is a database?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='449' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2159' \/><div class='watu-question-choice'><input type='radio' name='answer-449[]' id='answer-id-2159' class='answer answer-1  answerof-449' value='2159' \/>&nbsp;<label for='answer-id-2159' id='answer-label-2159' class=' answer label-1'><span class='answer'>A structured collection of data<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2160' \/><div class='watu-question-choice'><input type='radio' name='answer-449[]' id='answer-id-2160' class='answer answer-1  answerof-449' value='2160' \/>&nbsp;<label for='answer-id-2160' id='answer-label-2160' class=' answer label-1'><span class='answer'>A collection of files on a computer<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2161' \/><div class='watu-question-choice'><input type='radio' name='answer-449[]' id='answer-id-2161' class='answer answer-1  answerof-449' value='2161' \/>&nbsp;<label for='answer-id-2161' id='answer-label-2161' class=' answer label-1'><span class='answer'>A type of computer programming language<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2162' \/><div class='watu-question-choice'><input type='radio' name='answer-449[]' id='answer-id-2162' class='answer answer-1  answerof-449' value='2162' \/>&nbsp;<label for='answer-id-2162' id='answer-label-2162' class=' answer label-1'><span class='answer'>A graphical user interface<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType1' value='radio' class='required'><\/div><div class='watu-question' id='question-2'><div class='question-content'><p><span class='watu_num'>2. <\/span>Why is a database needed in the context of information management?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='450' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2163' \/><div class='watu-question-choice'><input type='radio' name='answer-450[]' id='answer-id-2163' class='answer answer-2  answerof-450' value='2163' \/>&nbsp;<label for='answer-id-2163' id='answer-label-2163' class=' answer label-2'><span class='answer'>To slow down data access<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2164' \/><div class='watu-question-choice'><input type='radio' name='answer-450[]' id='answer-id-2164' class='answer answer-2  answerof-450' value='2164' \/>&nbsp;<label for='answer-id-2164' id='answer-label-2164' class=' answer label-2'><span class='answer'>To limit data storage<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2165' \/><div class='watu-question-choice'><input type='radio' name='answer-450[]' id='answer-id-2165' class='answer answer-2  answerof-450' value='2165' \/>&nbsp;<label for='answer-id-2165' id='answer-label-2165' class=' answer label-2'><span class='answer'>To prevent data retrieval<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2166' \/><div class='watu-question-choice'><input type='radio' name='answer-450[]' id='answer-id-2166' class='answer answer-2  answerof-450' value='2166' \/>&nbsp;<label for='answer-id-2166' id='answer-label-2166' class=' answer label-2'><span class='answer'>To centralize and organize data<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType2' value='radio' class='required'><\/div><div class='watu-question' id='question-3'><div class='question-content'><p><span class='watu_num'>3. <\/span>What is the primary purpose of a database management system (DBMS)?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='451' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2167' \/><div class='watu-question-choice'><input type='radio' name='answer-451[]' id='answer-id-2167' class='answer answer-3  answerof-451' value='2167' \/>&nbsp;<label for='answer-id-2167' id='answer-label-2167' class=' answer label-3'><span class='answer'>To create computer programs<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2168' \/><div class='watu-question-choice'><input type='radio' name='answer-451[]' id='answer-id-2168' class='answer answer-3  answerof-451' value='2168' \/>&nbsp;<label for='answer-id-2168' id='answer-label-2168' class=' answer label-3'><span class='answer'>To facilitate internet communication<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2169' \/><div class='watu-question-choice'><input type='radio' name='answer-451[]' id='answer-id-2169' class='answer answer-3  answerof-451' value='2169' \/>&nbsp;<label for='answer-id-2169' id='answer-label-2169' class=' answer label-3'><span class='answer'>To manage and organize data in a database<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2170' \/><div class='watu-question-choice'><input type='radio' name='answer-451[]' id='answer-id-2170' class='answer answer-3  answerof-451' value='2170' \/>&nbsp;<label for='answer-id-2170' id='answer-label-2170' class=' answer label-3'><span class='answer'>To design hardware components<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType3' value='radio' class='required'><\/div><div class='watu-question' id='question-4'><div class='question-content'><p><span class='watu_num'>4. <\/span>In the context of databases, what is data integrity?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='452' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2171' \/><div class='watu-question-choice'><input type='radio' name='answer-452[]' id='answer-id-2171' class='answer answer-4  answerof-452' value='2171' \/>&nbsp;<label for='answer-id-2171' id='answer-label-2171' class=' answer label-4'><span class='answer'>The process of encrypting data<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2172' \/><div class='watu-question-choice'><input type='radio' name='answer-452[]' id='answer-id-2172' class='answer answer-4  answerof-452' value='2172' \/>&nbsp;<label for='answer-id-2172' id='answer-label-2172' class=' answer label-4'><span class='answer'>The accuracy and consistency of data<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2173' \/><div class='watu-question-choice'><input type='radio' name='answer-452[]' id='answer-id-2173' class='answer answer-4  answerof-452' value='2173' \/>&nbsp;<label for='answer-id-2173' id='answer-label-2173' class=' answer label-4'><span class='answer'>The speed of data retrieval<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2174' \/><div class='watu-question-choice'><input type='radio' name='answer-452[]' id='answer-id-2174' class='answer answer-4  answerof-452' value='2174' \/>&nbsp;<label for='answer-id-2174' id='answer-label-2174' class=' answer label-4'><span class='answer'>The amount of data storage<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType4' value='radio' class='required'><\/div><div class='watu-question' id='question-5'><div class='question-content'><p><span class='watu_num'>5. <\/span>How does a relational database differ from other types of databases?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='453' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2175' \/><div class='watu-question-choice'><input type='radio' name='answer-453[]' id='answer-id-2175' class='answer answer-5  answerof-453' value='2175' \/>&nbsp;<label for='answer-id-2175' id='answer-label-2175' class=' answer label-5'><span class='answer'>It uses a table-based structure to organize data<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2176' \/><div class='watu-question-choice'><input type='radio' name='answer-453[]' id='answer-id-2176' class='answer answer-5  answerof-453' value='2176' \/>&nbsp;<label for='answer-id-2176' id='answer-label-2176' class=' answer label-5'><span class='answer'>It stores data without any structure<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2177' \/><div class='watu-question-choice'><input type='radio' name='answer-453[]' id='answer-id-2177' class='answer answer-5  answerof-453' value='2177' \/>&nbsp;<label for='answer-id-2177' id='answer-label-2177' class=' answer label-5'><span class='answer'>It stores data in a single file<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2178' \/><div class='watu-question-choice'><input type='radio' name='answer-453[]' id='answer-id-2178' class='answer answer-5  answerof-453' value='2178' \/>&nbsp;<label for='answer-id-2178' id='answer-label-2178' class=' answer label-5'><span class='answer'>It doesn&#8217;t allow data retrieval<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType5' value='radio' class=''><\/div><div class='watu-question' id='question-6'><div class='question-content'><p><span class='watu_num'>6. <\/span>What is a relation in the context of the relational data model?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='454' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2179' \/><div class='watu-question-choice'><input type='radio' name='answer-454[]' id='answer-id-2179' class='answer answer-6  answerof-454' value='2179' \/>&nbsp;<label for='answer-id-2179' id='answer-label-2179' class=' answer label-6'><span class='answer'>The connection between two databases<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2180' \/><div class='watu-question-choice'><input type='radio' name='answer-454[]' id='answer-id-2180' class='answer answer-6  answerof-454' value='2180' \/>&nbsp;<label for='answer-id-2180' id='answer-label-2180' class=' answer label-6'><span class='answer'>The process of data retrieval<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2181' \/><div class='watu-question-choice'><input type='radio' name='answer-454[]' id='answer-id-2181' class='answer answer-6  answerof-454' value='2181' \/>&nbsp;<label for='answer-id-2181' id='answer-label-2181' class=' answer label-6'><span class='answer'>The encryption of data<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2182' \/><div class='watu-question-choice'><input type='radio' name='answer-454[]' id='answer-id-2182' class='answer answer-6  answerof-454' value='2182' \/>&nbsp;<label for='answer-id-2182' id='answer-label-2182' class=' answer label-6'><span class='answer'>A table that stores data<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType6' value='radio' class='required'><\/div><div class='watu-question' id='question-7'><div class='question-content'><p><span class='watu_num'>7. <\/span>In a relational data model, what is an attribute?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='455' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2183' \/><div class='watu-question-choice'><input type='radio' name='answer-455[]' id='answer-id-2183' class='answer answer-7  answerof-455' value='2183' \/>&nbsp;<label for='answer-id-2183' id='answer-label-2183' class=' answer label-7'><span class='answer'>A condition for data retrieval<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2184' \/><div class='watu-question-choice'><input type='radio' name='answer-455[]' id='answer-id-2184' class='answer answer-7  answerof-455' value='2184' \/>&nbsp;<label for='answer-id-2184' id='answer-label-2184' class=' answer label-7'><span class='answer'>A column or field in a table<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2185' \/><div class='watu-question-choice'><input type='radio' name='answer-455[]' id='answer-id-2185' class='answer answer-7  answerof-455' value='2185' \/>&nbsp;<label for='answer-id-2185' id='answer-label-2185' class=' answer label-7'><span class='answer'>A foreign key linking tables<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2186' \/><div class='watu-question-choice'><input type='radio' name='answer-455[]' id='answer-id-2186' class='answer answer-7  answerof-455' value='2186' \/>&nbsp;<label for='answer-id-2186' id='answer-label-2186' class=' answer label-7'><span class='answer'>The encryption key for data<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType7' value='radio' class='required'><\/div><div class='watu-question' id='question-8'><div class='question-content'><p><span class='watu_num'>8. <\/span>What is a tuple in the context of the relational data model?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='456' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2187' \/><div class='watu-question-choice'><input type='radio' name='answer-456[]' id='answer-id-2187' class='answer answer-8  answerof-456' value='2187' \/>&nbsp;<label for='answer-id-2187' id='answer-label-2187' class=' answer label-8'><span class='answer'>A type of data encryption<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2188' \/><div class='watu-question-choice'><input type='radio' name='answer-456[]' id='answer-id-2188' class='answer answer-8  answerof-456' value='2188' \/>&nbsp;<label for='answer-id-2188' id='answer-label-2188' class=' answer label-8'><span class='answer'>A row or record in a table<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2189' \/><div class='watu-question-choice'><input type='radio' name='answer-456[]' id='answer-id-2189' class='answer answer-8  answerof-456' value='2189' \/>&nbsp;<label for='answer-id-2189' id='answer-label-2189' class=' answer label-8'><span class='answer'>A query language for databases<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2190' \/><div class='watu-question-choice'><input type='radio' name='answer-456[]' id='answer-id-2190' class='answer answer-8  answerof-456' value='2190' \/>&nbsp;<label for='answer-id-2190' id='answer-label-2190' class=' answer label-8'><span class='answer'>A primary key in a table<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType8' value='radio' class='required'><\/div><div class='watu-question' id='question-9'><div class='question-content'><p><span class='watu_num'>9. <\/span>Define the term &#8220;domain&#8221; as it relates to the relational data model.<\/p>\n<\/div><input type='hidden' name='question_id[]' value='457' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2191' \/><div class='watu-question-choice'><input type='radio' name='answer-457[]' id='answer-id-2191' class='answer answer-9  answerof-457' value='2191' \/>&nbsp;<label for='answer-id-2191' id='answer-label-2191' class=' answer label-9'><span class='answer'>The set of allowed values for an attribute<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2192' \/><div class='watu-question-choice'><input type='radio' name='answer-457[]' id='answer-id-2192' class='answer answer-9  answerof-457' value='2192' \/>&nbsp;<label for='answer-id-2192' id='answer-label-2192' class=' answer label-9'><span class='answer'>The connection between tables<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2193' \/><div class='watu-question-choice'><input type='radio' name='answer-457[]' id='answer-id-2193' class='answer answer-9  answerof-457' value='2193' \/>&nbsp;<label for='answer-id-2193' id='answer-label-2193' class=' answer label-9'><span class='answer'>The total number of tuples in a table<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2194' \/><div class='watu-question-choice'><input type='radio' name='answer-457[]' id='answer-id-2194' class='answer answer-9  answerof-457' value='2194' \/>&nbsp;<label for='answer-id-2194' id='answer-label-2194' class=' answer label-9'><span class='answer'>The process of data insertion<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType9' value='radio' class='required'><\/div><div class='watu-question' id='question-10'><div class='question-content'><p><span class='watu_num'>10. <\/span>What does the &#8220;degree&#8221; of a relation represent?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='458' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2195' \/><div class='watu-question-choice'><input type='radio' name='answer-458[]' id='answer-id-2195' class='answer answer-10  answerof-458' value='2195' \/>&nbsp;<label for='answer-id-2195' id='answer-label-2195' class=' answer label-10'><span class='answer'>The level of encryption<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2196' \/><div class='watu-question-choice'><input type='radio' name='answer-458[]' id='answer-id-2196' class='answer answer-10  answerof-458' value='2196' \/>&nbsp;<label for='answer-id-2196' id='answer-label-2196' class=' answer label-10'><span class='answer'>The number of attributes in a relation<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2197' \/><div class='watu-question-choice'><input type='radio' name='answer-458[]' id='answer-id-2197' class='answer answer-10  answerof-458' value='2197' \/>&nbsp;<label for='answer-id-2197' id='answer-label-2197' class=' answer label-10'><span class='answer'>The number of tuples in a relation<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2198' \/><div class='watu-question-choice'><input type='radio' name='answer-458[]' id='answer-id-2198' class='answer answer-10  answerof-458' value='2198' \/>&nbsp;<label for='answer-id-2198' id='answer-label-2198' class=' answer label-10'><span class='answer'>The process of data deletion<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType10' value='radio' class='required'><\/div><div class='watu-question' id='question-11'><div class='question-content'><p><span class='watu_num'>11. <\/span>In the relational data model, what is cardinality?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='459' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2199' \/><div class='watu-question-choice'><input type='radio' name='answer-459[]' id='answer-id-2199' class='answer answer-11  answerof-459' value='2199' \/>&nbsp;<label for='answer-id-2199' id='answer-label-2199' class=' answer label-11'><span class='answer'>The process of data retrieval<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2200' \/><div class='watu-question-choice'><input type='radio' name='answer-459[]' id='answer-id-2200' class='answer answer-11  answerof-459' value='2200' \/>&nbsp;<label for='answer-id-2200' id='answer-label-2200' class=' answer label-11'><span class='answer'>The speed of data access<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2201' \/><div class='watu-question-choice'><input type='radio' name='answer-459[]' id='answer-id-2201' class='answer answer-11  answerof-459' value='2201' \/>&nbsp;<label for='answer-id-2201' id='answer-label-2201' class=' answer label-11'><span class='answer'>The number of relationships in a database<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2202' \/><div class='watu-question-choice'><input type='radio' name='answer-459[]' id='answer-id-2202' class='answer answer-11  answerof-459' value='2202' \/>&nbsp;<label for='answer-id-2202' id='answer-label-2202' class=' answer label-11'><span class='answer'>The number of tuples in a relation<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType11' value='radio' class='required'><\/div><div class='watu-question' id='question-12'><div class='question-content'><p><span class='watu_num'>12. <\/span>What is a candidate key in a relational database?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='460' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2203' \/><div class='watu-question-choice'><input type='radio' name='answer-460[]' id='answer-id-2203' class='answer answer-12  answerof-460' value='2203' \/>&nbsp;<label for='answer-id-2203' id='answer-label-2203' class=' answer label-12'><span class='answer'>An attribute with encrypted values<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2204' \/><div class='watu-question-choice'><input type='radio' name='answer-460[]' id='answer-id-2204' class='answer answer-12  answerof-460' value='2204' \/>&nbsp;<label for='answer-id-2204' id='answer-label-2204' class=' answer label-12'><span class='answer'>A key used for data retrieval<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2205' \/><div class='watu-question-choice'><input type='radio' name='answer-460[]' id='answer-id-2205' class='answer answer-12  answerof-460' value='2205' \/>&nbsp;<label for='answer-id-2205' id='answer-label-2205' class=' answer label-12'><span class='answer'>A unique identifier for a tuple in a table<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2206' \/><div class='watu-question-choice'><input type='radio' name='answer-460[]' id='answer-id-2206' class='answer answer-12  answerof-460' value='2206' \/>&nbsp;<label for='answer-id-2206' id='answer-label-2206' class=' answer label-12'><span class='answer'>The primary table in a database<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType12' value='radio' class='required'><\/div><div class='watu-question' id='question-13'><div class='question-content'><p><span class='watu_num'>13. <\/span>Define the term &#8220;primary key&#8221; in the context of the relational data model.<\/p>\n<\/div><input type='hidden' name='question_id[]' value='461' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2207' \/><div class='watu-question-choice'><input type='radio' name='answer-461[]' id='answer-id-2207' class='answer answer-13  answerof-461' value='2207' \/>&nbsp;<label for='answer-id-2207' id='answer-label-2207' class=' answer label-13'><span class='answer'>A unique identifier for a tuple in a table<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2208' \/><div class='watu-question-choice'><input type='radio' name='answer-461[]' id='answer-id-2208' class='answer answer-13  answerof-461' value='2208' \/>&nbsp;<label for='answer-id-2208' id='answer-label-2208' class=' answer label-13'><span class='answer'>A foreign key linking tables<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2209' \/><div class='watu-question-choice'><input type='radio' name='answer-461[]' id='answer-id-2209' class='answer answer-13  answerof-461' value='2209' \/>&nbsp;<label for='answer-id-2209' id='answer-label-2209' class=' answer label-13'><span class='answer'>A secondary table in a database<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2210' \/><div class='watu-question-choice'><input type='radio' name='answer-461[]' id='answer-id-2210' class='answer answer-13  answerof-461' value='2210' \/>&nbsp;<label for='answer-id-2210' id='answer-label-2210' class=' answer label-13'><span class='answer'>The number of attributes in a relation<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType13' value='radio' class='required'><\/div><div class='watu-question' id='question-14'><div class='question-content'><p><span class='watu_num'>14. <\/span>What is an alternate key in the relational data model?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='462' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2211' \/><div class='watu-question-choice'><input type='radio' name='answer-462[]' id='answer-id-2211' class='answer answer-14  answerof-462' value='2211' \/>&nbsp;<label for='answer-id-2211' id='answer-label-2211' class=' answer label-14'><span class='answer'>An attribute with encrypted values<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2212' \/><div class='watu-question-choice'><input type='radio' name='answer-462[]' id='answer-id-2212' class='answer answer-14  answerof-462' value='2212' \/>&nbsp;<label for='answer-id-2212' id='answer-label-2212' class=' answer label-14'><span class='answer'>A key used for data retrieval<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2213' \/><div class='watu-question-choice'><input type='radio' name='answer-462[]' id='answer-id-2213' class='answer answer-14  answerof-462' value='2213' \/>&nbsp;<label for='answer-id-2213' id='answer-label-2213' class=' answer label-14'><span class='answer'>A candidate key that is not selected as the primary key<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2214' \/><div class='watu-question-choice'><input type='radio' name='answer-462[]' id='answer-id-2214' class='answer answer-14  answerof-462' value='2214' \/>&nbsp;<label for='answer-id-2214' id='answer-label-2214' class=' answer label-14'><span class='answer'>The process of data deletion<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType14' value='radio' class='required'><\/div><div class='watu-question' id='question-15'><div class='question-content'><p><span class='watu_num'>15. <\/span>In the relational data model, what is a foreign key?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='463' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2215' \/><div class='watu-question-choice'><input type='radio' name='answer-463[]' id='answer-id-2215' class='answer answer-15  answerof-463' value='2215' \/>&nbsp;<label for='answer-id-2215' id='answer-label-2215' class=' answer label-15'><span class='answer'>A key used for data retrieval<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2216' \/><div class='watu-question-choice'><input type='radio' name='answer-463[]' id='answer-id-2216' class='answer answer-15  answerof-463' value='2216' \/>&nbsp;<label for='answer-id-2216' id='answer-label-2216' class=' answer label-15'><span class='answer'>A unique identifier for a tuple in a table<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2217' \/><div class='watu-question-choice'><input type='radio' name='answer-463[]' id='answer-id-2217' class='answer answer-15  answerof-463' value='2217' \/>&nbsp;<label for='answer-id-2217' id='answer-label-2217' class=' answer label-15'><span class='answer'>An attribute with encrypted values<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='2218' \/><div class='watu-question-choice'><input type='radio' name='answer-463[]' id='answer-id-2218' class='answer answer-15  answerof-463' value='2218' \/>&nbsp;<label for='answer-id-2218' id='answer-label-2218' class=' answer label-15'><span class='answer'>A field that links to the primary key in another table<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType15' 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