True a pdf is a file format that provides a electronic image of a document and it can be viewed, printed and electronically transmitted.
private static String removeFromString(String old, String frag)
{
int i = old.indexOf(frag);
while (i> -1) {
String rest = old.substring(i + frag.length());
System.out.println("rest = " + rest);
old = old.substring(0, i);
System.out.println("rest = " + old);
old = old + rest;
System.out.println("rest = " + old);
i = old.indexOf(frag);
System.out.println("i = "+ i);
}
return old;
}
Here the index of first occurrence is obtained outside the “while loop” and if this loop runs until index value is >-1. It extracts the rest of the characters other than “frag” from the index and all the characters for which the given set of characters are removed.
Answer:
c. You cannot change the name, return type, or parameters of a method defined by the interface.
Explanation:
When implementing an interface:
- The return type of the implementing method should be same as the one defined in the interface.
- The parameters of the implementing method should be the same as defined in the interface.
- The name of the method should be the same as that defined in the interface.
So among the given options , option c is the most relevant as it captures all the above conditions.
Answer:
Around seven billion people
