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CBSE Class 11 Pre Board 2019 : Informatics Practices (St Xavier's Sr. Sec. School, Delhi)

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Std. 11 16-2-2019 Annual Examination in INFORMATICS PRACTICE 1. Write any two differences between each of the following :a) b) c) d) e) f) g) Time : 3 hrs. Max. Marks : 70 [14] setText() and append() Sequential construst and Selective Construct System.out.print() and System.out.println() ? : and if..else statement jRadioButton and jCheckBox controls switch case and Multiple if else Operator = and Operator == 2. a) What happens if break is not written in switch..case statement? What name is given to this concept? [2] b) What is the significance of default statement is switch..case? Will the program generate error if default is not written in switch..case? [2] c) What is ternary operator? Explain with example. [2] d) Write the datatype name for the following values: [2] i) H ii) K iii) 89.67 iv) -45 e) Which control is used to group the jRadioButtons? Draw its icon. [2] f) What values can be stored in Boolean datatype? [1] 3. Write output of the following:a) int A=200 , B=250; String S1= INFORMATICS ; System.out.println( +A+B); System.out.println(S1.charAt(0)); System.out.println(S1.charAt(5)); System.out.println( +(A+B)); [4] b) switch( house ) { case T : jTextArea1.append( Tagore-Yellow ); case G : jTextArea1.append( Gandhi-Green ); case B : jTextArea1.append( Bhabha-Blue ); break; case N : jTextArea1.append( Nehru-Red ); default : jTextArea1.append( Not a valid House ); } What will be the output if the value of variable house is : i) N ii) G iii) B iv) H [6] c) int G = Integer.parseInt( jTextField1.getText() ); if ( G >=75 ) { if ( G >= 95 ) System.out.println( Excellent ); } else System.out.println( Can do better ); [3] if the input given for jTextField1 is : i) 82 ii) 98 iii) 61 4. Convert the following:a) if .. else to switch .. case String s1=jTextField1.getText(); char grade= s1.charAt(0); if (grade == 'A') jTextField1.setText( "Excellent" ); else if (grade == 'B') jTextField1.setText( "Better luck next time!" ); Std. 11 -2- [3] INFORMATICS PRACTICE

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