{"id":983,"date":"2023-10-02T05:05:31","date_gmt":"2023-10-02T05:05:31","guid":{"rendered":"https:\/\/pastpapers.imran.xyz\/?p=983"},"modified":"2023-10-02T11:37:35","modified_gmt":"2023-10-02T11:37:35","slug":"2nd-year-computer-science-chapter-9-online-mcq-test-for-12th-class-computer-science","status":"publish","type":"post","link":"https:\/\/pastpapers.imran.xyz\/index.php\/2023\/10\/02\/2nd-year-computer-science-chapter-9-online-mcq-test-for-12th-class-computer-science\/","title":{"rendered":"2nd Year Computer Science Chapter 9 Online MCQ Test"},"content":{"rendered":"<script type=\"text\/javascript\" >\ndocument.addEventListener(\"DOMContentLoaded\", function(event) { \nif(!window.jQuery) alert(\"The important jQuery library is not properly loaded in your site. Your WordPress theme is probably missing the essential wp_head() call. You can switch to another theme and you will see that the plugin works fine and this notice disappears. If you are still not sure what to do you can contact us for help.\");\n});\n<\/script>    \n<div  id=\"watupro_quiz\" class=\"quiz-area \">\n<p id=\"submittingExam1\" style=\"display:none;text-align:center;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/pastpapers.imran.xyz\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\"><\/p>\n\n\n\n<form action=\"\" method=\"post\" class=\"quiz-form\" id=\"quiz-1\"  enctype=\"multipart\/form-data\" >\n<div class='watu-question ' id='question-1'><div id='questionWrap-1'  class='  '>\n\t\t\t<div class='question-content' ><p><span class='watupro_num'>1. <\/span>Another way to write the value 3452211903 is:<\/p>\n<input type='hidden' name='question_id[]' id='qID_1' value='3' \/><input type='hidden' id='answerType3' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-3[]' id='answer-id-12' class='answer   answerof-3 ' value='12'   \/><label for='answer-id-12' id='answer-label-12' class=' answer'><span> 3.45221193e-09<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-3[]' id='answer-id-11' class='answer   answerof-3 ' value='11'   \/><label for='answer-id-11' id='answer-label-11' class=' answer'><span> 3.452211903e09<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-3[]' id='answer-id-14' class='answer   answerof-3 ' value='14'   \/><label for='answer-id-14' id='answer-label-14' class=' answer'><span> 3452211903e09<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-3[]' id='answer-id-13' class='answer   answerof-3 ' value='13'   \/><label for='answer-id-13' id='answer-label-13' class=' answer'><span> 3.452211903\u00d709<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><p class='watupro-qnum-info'>Question 1 of 10<\/p><\/div><div class='watu-question ' id='question-2'><div id='questionWrap-2'  class='  '>\n\t\t\t<div class='question-content' ><p><span class='watupro_num'>2. <\/span>Which of the following are valid variable names?<\/p>\n<input type='hidden' name='question_id[]' id='qID_2' value='4' \/><input type='hidden' id='answerType4' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-4[]' id='answer-id-16' class='answer   answerof-4 ' value='16'   \/><label for='answer-id-16' id='answer-label-16' class=' answer'><span> Integer<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-4[]' id='answer-id-17' class='answer   answerof-4 ' value='17'   \/><label for='answer-id-17' id='answer-label-17' class=' answer'><span> Notlongenough<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-4[]' id='answer-id-15' class='answer   answerof-4 ' value='15'   \/><label for='answer-id-15' id='answer-label-15' class=' answer'><span> Long<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-4[]' id='answer-id-18' class='answer   answerof-4 ' value='18'   \/><label for='answer-id-18' id='answer-label-18' class=' answer'><span> Both B and C<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><p class='watupro-qnum-info'>Question 2 of 10<\/p><\/div><div class='watu-question ' id='question-3'><div id='questionWrap-3'  class='  '>\n\t\t\t<div class='question-content' ><p><span class='watupro_num'>3. <\/span>Which term describes the kind of values that a variable can store?<\/p>\n<input type='hidden' name='question_id[]' id='qID_3' value='5' \/><input type='hidden' id='answerType5' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5[]' id='answer-id-19' class='answer   answerof-5 ' value='19'   \/><label for='answer-id-19' id='answer-label-19' class=' answer'><span> Varaible name<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5[]' id='answer-id-20' class='answer   answerof-5 ' value='20'   \/><label for='answer-id-20' id='answer-label-20' class=' answer'><span> Datatype<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5[]' id='answer-id-22' class='answer   answerof-5 ' value='22'   \/><label for='answer-id-22' id='answer-label-22' class=' answer'><span> Varaiblesize<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5[]' id='answer-id-21' class='answer   answerof-5 ' value='21'   \/><label for='answer-id-21' id='answer-label-21' class=' answer'><span> Varaibletype<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><p class='watupro-qnum-info'>Question 3 of 10<\/p><\/div><div class='watu-question ' id='question-4'><div id='questionWrap-4'  class='  '>\n\t\t\t<div class='question-content' ><p><span class='watupro_num'>4. <\/span>Relational operators are used to:<\/p>\n<input type='hidden' name='question_id[]' id='qID_4' value='6' \/><input type='hidden' id='answerType6' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-6[]' id='answer-id-26' class='answer   answerof-6 ' value='26'   \/><label for='answer-id-26' id='answer-label-26' class=' answer'><span> Performs arithmetic operators<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-6[]' id='answer-id-24' class='answer   answerof-6 ' value='24'   \/><label for='answer-id-24' id='answer-label-24' class=' answer'><span> Compare two values<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-6[]' id='answer-id-23' class='answer   answerof-6 ' value='23'   \/><label for='answer-id-23' id='answer-label-23' class=' answer'><span> Establish a relationship among variables<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-6[]' id='answer-id-25' class='answer   answerof-6 ' value='25'   \/><label for='answer-id-25' id='answer-label-25' class=' answer'><span> Construct compound condition<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><p class='watupro-qnum-info'>Question 4 of 10<\/p><\/div><div class='watu-question ' id='question-5'><div id='questionWrap-5'  class='  '>\n\t\t\t<div class='question-content' ><p><span class='watupro_num'>5. <\/span>Which is a valid statement for declaring a variable?<\/p>\n<input type='hidden' name='question_id[]' id='qID_5' value='7' \/><input type='hidden' id='answerType7' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-7[]' id='answer-id-28' class='answer   answerof-7 ' value='28'   \/><label for='answer-id-28' id='answer-label-28' class=' answer'><span> int a,b,c;<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-7[]' id='answer-id-29' class='answer   answerof-7 ' value='29'   \/><label for='answer-id-29' id='answer-label-29' class=' answer'><span> Double salary;<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-7[]' id='answer-id-30' class='answer   answerof-7 ' value='30'   \/><label for='answer-id-30' id='answer-label-30' class=' answer'><span> All<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-7[]' id='answer-id-27' class='answer   answerof-7 ' value='27'   \/><label for='answer-id-27' id='answer-label-27' class=' answer'><span> int marks;<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><p class='watupro-qnum-info'>Question 5 of 10<\/p><\/div><div class='watu-question ' id='question-6'><div id='questionWrap-6'  class='  '>\n\t\t\t<div class='question-content' ><p><span class='watupro_num'>6. <\/span>How many primary keys can a table have?<\/p>\n<input type='hidden' name='question_id[]' id='qID_6' value='8' \/><input type='hidden' id='answerType8' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8[]' id='answer-id-34' class='answer   answerof-8 ' value='34'   \/><label for='answer-id-34' id='answer-label-34' class=' answer'><span> No limit<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8[]' id='answer-id-32' class='answer   answerof-8 ' value='32'   \/><label for='answer-id-32' id='answer-label-32' class=' answer'><span> At least one but not more than two<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8[]' id='answer-id-33' class='answer   answerof-8 ' value='33'   \/><label for='answer-id-33' id='answer-label-33' class=' answer'><span> Between 1-5<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8[]' id='answer-id-31' class='answer   answerof-8 ' value='31'   \/><label for='answer-id-31' id='answer-label-31' class=' answer'><span> One<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><p class='watupro-qnum-info'>Question 6 of 10<\/p><\/div><div class='watu-question ' id='question-7'><div id='questionWrap-7'  class='  '>\n\t\t\t<div class='question-content' ><p><span class='watupro_num'>7. <\/span>The number of bytes used by char data type in C is:<\/p>\n<input type='hidden' name='question_id[]' id='qID_7' value='9' \/><input type='hidden' id='answerType9' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-9[]' id='answer-id-36' class='answer   answerof-9 ' value='36'   \/><label for='answer-id-36' id='answer-label-36' class=' answer'><span> 1<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-9[]' id='answer-id-37' class='answer   answerof-9 ' value='37'   \/><label for='answer-id-37' id='answer-label-37' class=' answer'><span> 121<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-9[]' id='answer-id-35' class='answer   answerof-9 ' value='35'   \/><label for='answer-id-35' id='answer-label-35' class=' answer'><span> 2<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-9[]' id='answer-id-38' class='answer   answerof-9 ' value='38'   \/><label for='answer-id-38' id='answer-label-38' class=' answer'><span> 16<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><p class='watupro-qnum-info'>Question 7 of 10<\/p><\/div><div class='watu-question ' id='question-8'><div id='questionWrap-8'  class='  '>\n\t\t\t<div class='question-content' ><p><span class='watupro_num'>8. <\/span>Which is NOT a rule for naming variables?<\/p>\n<input type='hidden' name='question_id[]' id='qID_8' value='10' \/><input type='hidden' id='answerType10' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-10[]' id='answer-id-40' class='answer   answerof-10 ' value='40'   \/><label for='answer-id-40' id='answer-label-40' class=' answer'><span> Start the name of variable with a letter<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-10[]' id='answer-id-41' class='answer   answerof-10 ' value='41'   \/><label for='answer-id-41' id='answer-label-41' class=' answer'><span> Use nothing but letters, digits, or the underscore character<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-10[]' id='answer-id-42' class='answer   answerof-10 ' value='42'   \/><label for='answer-id-42' id='answer-label-42' class=' answer'><span> All the above<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-10[]' id='answer-id-39' class='answer   answerof-10 ' value='39'   \/><label for='answer-id-39' id='answer-label-39' class=' answer'><span> Use a descriptive name for the value<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><p class='watupro-qnum-info'>Question 8 of 10<\/p><\/div><div class='watu-question ' id='question-9'><div id='questionWrap-9'  class='  '>\n\t\t\t<div class='question-content' ><p><span class='watupro_num'>9. <\/span>The float, long float and double data types are known as:<\/p>\n<input type='hidden' name='question_id[]' id='qID_9' value='11' \/><input type='hidden' id='answerType11' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-11[]' id='answer-id-44' class='answer   answerof-11 ' value='44'   \/><label for='answer-id-44' id='answer-label-44' class=' answer'><span> Character data<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-11[]' id='answer-id-45' class='answer   answerof-11 ' value='45'   \/><label for='answer-id-45' id='answer-label-45' class=' answer'><span> Integral data<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-11[]' id='answer-id-46' class='answer   answerof-11 ' value='46'   \/><label for='answer-id-46' id='answer-label-46' class=' answer'><span> Real data<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-11[]' id='answer-id-43' class='answer   answerof-11 ' value='43'   \/><label for='answer-id-43' id='answer-label-43' class=' answer'><span> Integer data<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><p class='watupro-qnum-info'>Question 9 of 10<\/p><\/div><div class='watu-question ' id='question-10'><div id='questionWrap-10'  class='  '>\n\t\t\t<div class='question-content' ><p><span class='watupro_num'>10. <\/span>A candidate key is:<\/p>\n<input type='hidden' name='question_id[]' id='qID_10' value='12' \/><input type='hidden' id='answerType12' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-12[]' id='answer-id-47' class='answer   answerof-12 ' value='47'   \/><label for='answer-id-47' id='answer-label-47' class=' answer'><span> Primary key<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-12[]' id='answer-id-48' class='answer   answerof-12 ' value='48'   \/><label for='answer-id-48' id='answer-label-48' class=' answer'><span> The primary key selected to be the key of relation<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-12[]' id='answer-id-49' class='answer   answerof-12 ' value='49'   \/><label for='answer-id-49' id='answer-label-49' class=' answer'><span> A group attribute that can be the primary key<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-12[]' id='answer-id-50' class='answer   answerof-12 ' value='50'   \/><label for='answer-id-50' id='answer-label-50' class=' answer'><span> All of them<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><p class='watupro-qnum-info'>Question 10 of 10<\/p><\/div><div style='display:none' id='question-11'>\n\t<div class='question-content'>\n\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/pastpapers.imran.xyz\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\" alt=\"Loading...\" title=\"Loading...\" \/>&nbsp;Loading...\t<\/div>\n<\/div>\n\n<br \/>\n\t\n\t\t\t<div class=\"watupro_buttons flex\" 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