TEST 1
Rewrite the following switch
statement using if-else statement and display the result
using appropriate IDE.
switch(number){
case 1:
jLable2.setText(“digits”);
break;
case 10:
jLable2.setText(“Tens”);
break;
case 100:
jLable2.setText(“Hundreds”);
break;
case 1000:
jLable2.setText(“Thousands”);
break;
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default:
jLable2.setText(“error”);
break;
}
What will be the output the
following code fragment if the value of ch is
(i) a (ii) c (iii) d (iv) b?
switch (ch)
{ case ‘a’:
system.out.println(“It is a.”);
case ‘b’: system.out.println(“It
is b.”);
case ‘c’: system.out.println(“It
is c.”);
break;
case ‘d’: system.out.println(“It
is d.”);
break;
default: system.out.println(“Not a ,b,c ,and d.”);
}
Q) Given THE following set of values:
Byte
b;
Char
ch;
Short
sh;
Int
intval;
long
longval;
float
fl;
identify the
datatype of the following expressions:
1) ‘a’-3;
2) Intval*longval-ch;
3) Fl+longval/sh;
Q) Suppose x and y are two double type variables
that you want to add as integers and assign it to an integer variable.
Construct a java statement for doing so.
Q)Predict output:
Int
a=5;int b=10;
If(a>5)
If(b>5)
{
System.out.println(“b”+b);
}
else
System.out.printn(“a”+a);
What
is the output of the following program?
int
a=1, b=10;
do
{if(a++>- -b)
{continue;}
}
while (a<5);
System.out.println(“a=”
+i+ “and b= “+b);
(A) a=6 and b=5 (B)
a=5 and b=5
(C) a=6 and b=5 (D)
a=5 and b=6
(E) a=6 and b=6
What
is type casting?\
What
is coercion?
What are Keywords? Give two
examples of keywords available in Java.
Name and explain the usage of any
one relational and one logical operator in Java.
What is the difference between =
and == operator in java?
Name the two type of selection
statement available in Java.
Write the purpose of Switch
Statement with the help of an example. Which Java
Statement can be used in place of
switch statement? In the switch statement, what
happens if every case fails and
there is no default option?
What is the purpose of ‘break’
statement in java?
What is the purpose of ‘continue’
statement in java?
What is the difference between
entry controlled and exit controlled loop
Differentiate between while and
do while loop of Java giving suitable examples.
Evaluate the following
expressions separately in Java. Assume all variable to be
integers and initial value of a
as 10 and b as 20
a. x = a++ + b++;
b. x= ++a + ++ b;
c. x= ++a + b++;
d. x = a / b % b;
e. x= b / a % b;
f. x = b + a++ % b;
g. x = a+ b *a * b;
What would be output of the
following code segment written in java.
public static void main(String []
args)
{
int a=10, b= 9;
boolean x;
x = a++ == ++b;
System.out.print("x =
"+x);
}
Find the output of the following
code snippet written in java
public static void main(String
[]args)
{
int x=10, y=5;
System.out.println(x++);
System.out.println(++y);
System.out.println((x++ + ++y));
System.out.println((++x - y++));
System.out.println((x++) +
(++y));
System.out.println((++x)-(y++));
System.out.println((x++) +
(++x));
System.out.println("x =
"+ X +" y="+ y);
}
Find the output of the following
code snippet written in java
public static void main(String
[]args)
{
long a=78345,s1=0,s2=0,r;
while(a>0)
{
r=a%10;
if (r%4==0)
s1+= r;
else
s2+=r;
a/=10;
}
System.out.println("S1
="+ s1);
System.out.println("S2
="+ s2);
}
Find the output of the following
code snippet written in java
public static void main(String
args[])
{
int no1=2,no2=1,i;
while(no2<=3)
{
i=no1;
while(i<=no2)
{
no1=no1*i;
i++;
}
System.out.println("No1
"+ no1);
System.out.println("No2
"+ no2);
no2++;
}
}
Find the output of the following
code snippet written in java
public static void main(String
args[])
{
int x=1,y=1,z=1,i=1;
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while(y<=3)
{
z=1;
while(z<=y)
{
x=x*i;
i++; z++;
}
System.out.println("x=
"+x);
y++;
}
}
Find the output of the following
code segment written in JAVA. Assume all necessary
header files have been included
and ignore any syntax error if any.
public static void main(String []
args)
{
int i = 3, a=0, b=1, n=5, c;
System.out.print(a+ “ “+b+” “);
while ( i < n)
{
c= a + b;
System.out.print(c+” “);
a = c - a;
b = c;
i++;
}
}
How many times will the following
loop get executed and what will be the final value of
the variable I after execution
the loop is over.
int I = 5;
do
{
I += 3;
System.out.println("I =
"+I);
I = I + 1;
}
while (I >= 9);
Correct the errors in the
following program segment written in JAVA. You are just
required to write the corrected
code, underlying the corrections made.
Public Static Void Main (String
[] args)
{
Integer Nos = 100;
while (Nos => 45)
{
If (Nos % 5 = 0);
Nos+=10;
otherwise
Nos + = 20;
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}
}
Convert the following ‘while
loop’ into its equivalent ‘for loop without altering the output
of the program.
int x = 100, a = 30;
while ( x>= 10)
{
System.out.println(”New Amount
=”+(x + a));
a++;
x - = a;
byte b;
double d= 417.35;
b= (byte) d;
system.out.println(b);
What will be the output of the
following program code?
int m = 100;
int n = 300;
while(++m < --n);
System.out.println(m+” “+ n);
What does the following fragment
display
String s = “Six:” + 3+ 3;
System.out.println(s);
State the output of the following
program:
public static void main(String
args[ ])
{
int x = 10;
int y = 15;
System.ou.println((x>y)? 3.14:
3);
}
State the output of the following
program:
public static void main(String
args[ ])
{
int x = 10;
float y = 10.0;
System.ou.println((x>y)? true:
false);
}
CONVERT
switch(fruit)
{
case ‘A’ :
case ‘a’ : System.out.println(“She likes apple.”);
break;
case ‘O’ :
case ‘o’ : System.out.println(“She likes oranges.”);
break;
default : System.out.println(“She has no preference.”);
}
{
case ‘A’ :
case ‘a’ : System.out.println(“She likes apple.”);
break;
case ‘O’ :
case ‘o’ : System.out.println(“She likes oranges.”);
break;
default : System.out.println(“She has no preference.”);
}
switch(ch){
case'A': b++;
case'B': ++b;
default: b+=2; System.out.print(b);
}
case'A': b++;
case'B': ++b;
default: b+=2; System.out.print(b);
}
PREDICT OUTPUT:
int i,j;
for(i=1;i<=4;i++)
{for(j=1;j<=i;j++)
System.out.print(""+i);
System.out.println();
}
Write a program to check whether a given number is a palindrome or not.
Write a program to check whther the given number is odd or even. If odd, then produce factorial of that number and if even, produce fibonacci series of that number.
or
Write a program to check whther a number is odd or even . if odd, produce a table of that number uptil 10. if even, do nothing.
int m=10,n=7;
while(m%n>=0)
{
m++;
n=n+2;
}
How many times the loop will be executed?
Rewrite while into for loop
int a=10;
while(a<=100)
{
system.out.println("hello");
a=a*5;
}
Find error:
int i,j;
for(i=1,j=2;i>=10;i++,j++);
System.print("hello");
