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computer application worksheet

9 pages, 50 questions, 4 questions with responses, 4 total responses,

Namratha Simha
Shantiniketan Trust School, Bangalore

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Worksheet 1 Find the outputs : 1. int a=0; if (a>0 && a<20) a++; else a--; System.out.println(a); 2. int x=2, y=5; x=++y - (- -x); y+=x; System.out.println( x= +x+ y= +y); 3. int a=4,b=-3,c; c=b-- + (++a) b; System.out.println( a= +a+ b= +b+ c= +c); 4. int a=10,b=15; while(++a<--b) System.out.println(b); System.out.println(a); 5. int a=10,b=15; while(++a<--b) { System.out.print(b); System.out.print(a); } 6.int a=63,b=36; boolean x=(a>b)?true:false; int y=(a<b)?a:b; System.out.println( x = +x+ y= +y); 7.What will be the values of n and ch? Char c='D'; int n=c+1; char ch=(char)n 8.What will be the value of x after the following code? Int x=4; x+=(x++)+(++x)+x; 9.double x=2.9, y=2.5; System.out.println(Math.min(Math.floor(x),y)); System.out.println(Math.max(Math.ceil(x),y)); 10.String x= Examination ; System.out.println(x.charAt(2)==x.charAt(6)); 11. Int the following code write the names of : class variable, instance variable, local variable and method argument. Class A { static int j=9; int k; void calc(int p) { double n=10; .. } } 12. output? Int p=10; do { p- -; System.out.println( p= +p); p--; }while(p>=2); 13. Write the equivalent ternary operator for the following code : int h,n=5,m=11; if (n>m) h=0; else h=1; 14.output System.out.println( four +4+2); System.out.println( Four +(4+2)); System.out.println(4+2); 15. o/p int m=2,n=15; for(int i=1;i<5;i++) m++; n--; System.out.println( m= +m); System.out.println(( n= +n); 16. What will be the data type if the following expression is evaluated? Char c; int I; long m; c+i*(m+c); 17. What will be the value of x, if int a=10, b=5, c=8; float x=(float) a+b*c; 18. o/p class Arithmetic { void calc() { int a=4, b=6, c=10; add(a,b); System.out.println( a= +a+ = +b+ c= +c); } void add(int a,int b) { a=5; int c=a+b; System.out.println(( the value of a,b,c are : +a+b+c); } } 19. Assign a value pi (3.142) to a variable with the required data type. The value should not change throught the program. 20.what will be the value of z? Int x=20,y=10,z; z=++x*(y--)-y? 21.o/p int a=0; if (a>0 && a<20) a++; else a--; System.out.println(a); 22. o/p int a=5, b=2,c; if(a>b || a!=b) c=++a + --b; System.out.print(c+ +a+ +b); 23. o/p int i=1; while(i++<=1) { i++; System.out.println(i+ ); } System.out.print(i); 24.o/p int i=1; while(i++<=1) { i++; System.out.print(i+ ); } System.out.println(i); 25. What will be the o/p if the value of num is 123? void x(int num) { int a,b=num,c=0,d,s=0; while(b!=0) { d=b%10; a=(int)Math.pow(10,c++); System.out.println((d*a); b=b/10; } } 26.System.out.println( eight= +3+5); System.out.println( six= +(2+4)); 27.o/p int i=1; while(i++>=1) { if(i>=5) break; } System.out.print(i); 28.o/p int i=3; float k=3.2f; long m=-3; if(Math.ceil(i)<Math.floor(k)) { if (Math.abs(i)==m) System.out.println(i); else System.out.println(j); } else System.out.println(Math.abs(m)+1); 29. long m=-3; System.out.println(Math.abs(m)+1); System.out.println( Answer +Math.abs(m)+1); 30. int a=5,b=3; b+=(b+a) / ((++a b++) - (a-b)); System.out.println(a+ \t +b); 31. o/p int x=10, y=21; System.out.println(Math.abs(Math.max(Math.min(x,y),y))); 32.o/p int x=20; String sup=(x<15)? small :(x<22)? tiny : huge ; System.out.println(sup); 33.o/p class P { p s v m() { P o=new P(); o.start(); } void start() { String s1= slip ; String s2=fix(s1); System.out.println(s1+ +s2); } String fix(String s1) { s1=s1+ stream ; System.out.println(s1+ ); return stream ; } } 34.o/p int n=0; int i=1; while(i<4) { int j=1; while(j<=i) { n+=1; System.out.println(j); j++; } System.out.println(); i=i+1; } 35.o/p System.out.println(Math.max(Math.ceil(-7.65), Math.floor(-8.65))); 36. o/p int y=14; int z=++y * (y-- + --y); System.out.println(z); 37. o/p int n=10; while(n!=1) { if(n%2==0) n=n/2; else n=(3*n)+1; System.out.println(n); } 38. correct the error : class c3 { void double(int x) { x=x*2; System.out.println(); } static void d() { double(); } } 39. How many times will the following loop be executed ? a) int x=5, y=50; while(x<=y) { x=y/x; } b)int s=0,i=0; while(s++<5) { System.out.println(++s); } 40. What will be the o/p if a. int x=10 b. int x=29 while(x>0) { x=x/10 ; System.out.println( x = +x); } Write the equivalent while loop for the following : int n=25; for(int i=10;i>=2;i=i-2) n++; Write the equivalent while loop for the following : int f=1,i; for(int i=1;i<=5;i++) {f*=i; System.out.println((f); } What will be the value of i after evaluating the following : int i=17; i>>=1; i=8(17) Write the java expression for ******************** 1. consider the following statement and answer the questions that follow : String x[]={ Hello , World }; a. What is x[1].length() ? b. What is x.length ? 2.State the data type and values of a and b, after the following statements are executed : String s1= computer , s2= applications ; a=s1.compareTo(s2); b=s1.equals(s2); 3. output? String s= malayalam ; System.out.println(s.indexOf('m'); System.out.println(s.lastIndexOf('m'); 4. if String x= Happy Awesome World , write the function to replace all the 'o' characters with 'a' characters. 5.o/p String s1= MINORITY ; String s2= REPORT ; a. System.out.println(s1.substring(0,3)+(s2.substring(3,5); b. System.out.println(s2.sustring(2)); c. System.out.println(s2.replace('p','s')); d. System.out.println(s1.charAt(s1.indexOf('R')+s2.indexOf('R'); 6.o/p char c[]={'a','b','c'}; String s1=new String(s); String s2= abc ; System.out.println(s2.compareTo(s1)); System.out.println(s2.equals(s1)); System.out.println(s1.length()); System.out.println(s1.concat(s2)); 7.o/p System.out.println(( WONDERFUL .substring(6)); System.out.println(( Bravery .indexOf('r',3)); 8. o/p boolean k; k=( BLUEJ .length()> JAVA .length())?true:false); System.out.println(k); 9. o/p char a[]={'a',b','1','?','A',' '}; System.out.println(Character.isDigit(a[2])); System.out.println(Character.toLowerCase(a[4])); System.out.println(Character.isWhitespace(a[5]); System.out.println(Character.isLetterOrDigit(a[0])); ********** 2. Write the declaration statements for : a, A 1-d array of size 10 b. A 2-d array having 4 rows and 6 columns 3.Write the statement to declare and initialize an integer array of size 5 with the following values : 3,5,8,7,10. 4. If int a[2][3] is an array, how do you access the element in the 1st row and 2nd column? 5. o/p int [] a={9,4,3,7,0}; for(i=0;i<=3;i++) { a[i+1]=(a[i]%2==0?++a[i]: a[i]); System.out.println(a[i]+ ); }

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