java interview gyan by dilip sir
1) Write a Java program to print Fibonacci series?
2) Write a Java program to check if a number is Prime or not?
3) How to Swap two numbers without using temp variable?
4) Difference between String, StringBuffer and StringBuilder in Java?
5) Difference between extends Thread vs implements Runnable in Java?
6) Difference between Runnable and Callable interface in Java?
7) Difference between ArrayList and LinkedList in Java?
8) What is difference between wait and notify and yield in Java?
9) Difference between HashMap and Hashtable in Java?
10) Difference between TreeSet and TreeMap in Java?
LOGIC for fibonacci:-
ReplyDeleteint i1=0,i2=1,i3;
for(int i=2;i<=10;i++){
i3 = i1+i2;
i1=i2;
i2=i3;
}
print i3;
LOGIC for SWAP without temp:-
ReplyDeleteint a=10,b=5;
a = a + b;
b = a - b;
print b;
a = a - b;
print a;
LOGIC for Checking PRIME NO:-
ReplyDeleteint n=5; //No.to be checked
int flag=0;m=0;
m=n/2;
for(int i=2;i<=m;i++){
if(n%i==0){
print "Number is not prime";
flag=1;
break;
}
}
if(flag==0){
print "Number is prime";
}