INDIAN COMMUNITY SCHOOL INFORMATICS PRACTICES 2012

Transcription

1 INDIAN COMMUNITY SCHOOL INFORMATICS PRACTICES 0. Write corresponding C ++ expression for the following mthemticl expression: i) (-b) + (c-d) ii) e x x. Write C++ expression for the following: ) All possible wys of incrementing vlue stored in vrible vl by. b) Check tht n integer vrible num is divisible by 3 but not divisible by. 3. ) Give the output of the following progrm segment: int x=0,y=3; x = x x + ++y + y; System.out.println( the output is + x + ; + y); b) int n= 783, s=0, s=0; while (n>0) { int r=n%0; if (r%) s+=9*r*r-; s+=4*r*r+; n/=0; lblnum.settext( +s+, +s); 4. Consider the progrm segment given below: int choice = Integer.prseInt(txtvl.getText()); if (choice==) { lblvl.settext(ïnput Kuwiti dinr ); Double usd=3. *kwd; System.out.println( Dollr= +usd); if (choice==) { lblvl.settext(ïnput Kuwiti dinr ); Double gbp=. *kwd; System.out.println( Pound= +gbp); if (choice==3) { lblvl.settext(ïnput Kuwiti dinr ); Double euro=.3 *kwd; System.out.println( Euro= +euro); if (choice==4) { lblvl.settext( Input Kuwiti dinr ); Double inr=4. *kwd; System.out.println( Rupees= +inr); Replce if--if sttement by switch-cse construct. Mrks 70. Find syntx error(s) if ny nd rewrite the complete progrm fter mking the necessry chnges (underline the corrections): 9

2 { double,b,c; int = Integer.prseInt(txtvl.getText()); int b = Integer.prseInt(txtvl.getText()); int c = Integer.prseInt(txtvl.getText()); double s=(+b+c)/,p=s(s-)(s-b)(s-c); re=sqrt(p); System.out.print( Are of tringle +AREA);. Write equivlent while loop for the given code: : finl int SZ = ; for ( int i=0, sum=0; i<sz ; i++) sum +=i; System.out.println (sum) ; 7. An integer is sid to be prime if it is divisible only by nd itself.for exmple,3, nd 7 re prime but 4, nd 9 re not prime.write the code to determine if number is prime or not. 8. Write progrm tht tkes number nd displys the sum of ll even digits in the number. For exmple if the rgument pssed is 83, the procedure should disply (++8).Implement the method through GUI ppliction tht obtins number in text field (numtf), computes the sum of its digits in lbel(outlbl). Write code for ction event hndler of SumBtn. 9. Red the following cse study nd nswer the questions tht follow. Develop n ppliction to prepre students grde on the bsis of Percentge entered. The criteri hve given below for grde evlution. A smple screen shot is being shown below Criteri Per Grde >=90 A >=7 nd <90 B >=0 nd <7 C >=4 nd <0 D <4 E

3 INDIAN COMMUNITY SCHOOL INFORMATICS PRACTICES 0 Mrks 70 Q Differentite between the following : ) Single user & Multiuser Operting System b How is compiler different from Interpreter. c Define the term Firewll in computer. d Why is it necessry to use ROM in computer? e Wht is the function of bus? Nme ny two bus. f Wht is cookie? g Differentite between virus nd worm. h Define ntivirus softwre. i Wht is ment by Spywre? Q Differentite between Text field nd Text re components. b Wht is the difference between selection nd Itertion sttement? Q3 Find the output of the following code segment: int i; for ( i = ; i > 0 ; i - = ) { System.out.println ( i ); i + +; 3 System.out.println ( i ); b int c = 0, i = 9; while ( i < 0 ) { c = c + i i * ; i + + ; System.out.println ( c = + c + i = + i ); c int i, sum = 0 ; i = ; do { sum = sum + i ; i += 3 ; while ( i < = 0) ; System.out.println ( sum ) ; d The following code hs some error(s).rewrite the correct code underlining ll the corrections mde: int y = ; p ; do { y = 3.4 * y ; p = y % 0; system.out.print( Two ); while ( y = > ) e Re-write the following WHILE sttement using FOR sttement: int j=,s=0; while ( j < 0 ) { System. out.print(j); s = s + j; j + =3; Q4 Red the following cse study nd nswer the question tht follows: A progrmmer is required to develop student record.the school offers two different strems medicl nd non-medicl with different grding criteri.the following is the dt entry screen used to clculte percentge nd grde. 3

4 i ii iii b Write the code for Frme Window Activte to disble the percentge nd Grde text fields. Write the code for the Clculte Percentge button nd to disply in the textfield fter finding the totl mrks in first nd second term (ssuming both the mrks re out of 00). Write the code for Clculte Grde button nd to disply in the textfield depending on the strem selected ccording to the criteri in the following tble. Strem Percentge Grde Non MEDICAL >= 7 A 0-7 B < 0 C MEDICAL >= 80 A 0-80 B < 0 C ½ ½ 3

5 An ice-crem prlour offers three vrieties of ice-crem vnill,strwberry,chocolte.vnill Ice-crem cost Rs. 0, Strwberry cost Rs. 0 nd Chocolte cost Rs.7.A person cn choose one or more ice-crem with quntities more thn one for ech of the vriety chosen.to clculte the bill the Prlour owner selects the pproprite check boxes ccording to the vrieties of ice-crem chose by the customer nd enter the corresponding quntities. i Write Jv code for the following: 3½ On the click event of Clculte,the ppliction finds nd disply the totl bill of the customer.it first displys the rte of vrious vrieties of ice-crem in the respective text fields.if the user doesn t select check box,the respective icecrem rte nd quntity must be zero.the bill is clculted by multiplying the vrious quntities with their respective rte nd lter dding them ll ii On the click event of Cler button ll the text field nd check box must be clered. iii On the click event of Close button the ppliction gets closed. ½ Q i Rnbeer hs creted tble nmely tril tht hs 7 columns nd 3 test records.after testing, Rnbeer dded three more columns, 4 more rows but deleted the 3 test records.wht is the degree nd crdinlity of the tble now? ii Which sttement is used to select dtbse nd mke it current? iii Sumit creted tble in Mysql.Lter on he found tht there should hve been nother column in the tble. Which commnds should he use to dd nother column to the tble? iv Define Function. How re numeric functions different from String functions? b i Write MySql commnd to crete furniture tble including ll constrint. No INT Primry key Shop_nme VARCHAR 0 Unique Sle INT Are CHAR Cust_Percent DECIMAL 3, Rting CHAR Defult D City VARCHAR 8 Tble:SHOP No Shop_nme Sle Are Cust_Percent Rting City S.M.Sons 0000 West 8. C Delhi Dhrohr South 8.8 A Mumbi 3 Kriti Art North 79.8 B Kolkt 4 Ripple North 88.0 B Mumbi Bisws Stores 4000 Est 9.0 A Delhi Crystl South.7 A Kolkt Write MySQL commnds for the bove tble: ii Insert new row with the following dt: 8 Srit Bisws Mumbi iii Disply the th to 7 th chrcter of shop nmes. iv Decrese the size of Rting column to one chrcter. v Disply list of ll shops with sle greter thn in descending order of shop_nme vi Disply report with shop_nme, re nd rting for ech shop in the tble,for only those shops whose sle is in the rnge to ( including both nd ).

6 vii Disply the city nd the nmes of shops in the tble whose cust_percent is 79.8 nd 9. viii Increse the sle by % whose Are is South. ix Add new column Commission of type deciml (3,). x Write the commnd to print the first three chrcters of city. xi Chnge the sle nd rting of shop to nd A whose city is delhi. xii Disply the position of S in nme of the shop whose rting is C. xiii Disply the combined length of shopnme nd re whose sle is greter thn xiv Disply list of ll shops long with tx which is clculted s % of Sle.Give pproprite column nmes. Q Find the output for the given tble HOSPITAL PNo Nme Age Deprtment Dteofdm Chrges Sex Arpit ent M Zrin surgery F 3 Kreem 3 orthopedic M 4 Zubin 30 ent NULL M Ketki crdiology F Zreen 4 gynecology F 7 Shilp 3 nucler med F i Select * from Hospitl where Chrges > 400; ii Select Nme from Hospitl where Deprtment like ' _'; iii Select Nme,Deprtment,Chrges+0 s 'Revised chrges' from Hospitl; iv Select distinct Deprtment from Hospitl; v Select Nme,Deprtment from Hospitl where Sex= M nd ge >40; b i Select Nme,month(Dteofdm), yer(dteofdm) from HOSPITAL where Chrges IS NULL ; ii Select Nme,Right(Deprtment,4) from Hospitl; iii Select substr(nme,3,) from Hospitl where Age < 30; iv Select Nme,instr(Deprtment, e )+round(.78,-) from Hospitl; v Select conct(left(nme,),left(deprtment,3)) from hospitl; Q7 Define e-governnce. b Wht re the different types of e-business? c Give ny two benefits of e-lerning. d Vijyn works for the Customs deprtment.he wishes to crete controls on form for the following functions. Choose pproprite controls from Text box, Lbel, Option button, Check box, List Box, Combo Box, Commnd button nd write in the third column. Sno Control used Control Enter lst nme Enter gender 3 Choose city from list of cities 4 Submit form