Interview Questions and Answers for 'Evergent' | Search Interview Question

Interview Questions and Answers for 'Evergent' - 2 question(s) found - Order By Newest

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Q1. What is a String Pool ?

Ans. String pool (String intern pool) is a special storage area in Java heap. When a string is created and if the string already exists in the pool, the reference of the existing string will be returned, instead of creating a new object and returning its reference.

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Related Questions

What are different ways to create String Object? Explain.

Why Char array is preferred over String for storing password?

How does making string as immutable helps with securing information ? How does String Pool pose a security threat ?

Which memory segment holds String Pool in Java ?

How and Why Strings are interned in Java ?

What will be the output of following code

Integer x = 1;
Integer y = 2;
System.out.println(x == y);

What if you change 1 to "1" and Integer to String?

What will be result of following code and why

Integer int1 = 1;
Integer int2 = 1;
String str1 = new String("str");
String str2 = new String("str");
String str3 = "str";
String str4 = "str";

System.out.println(int1 == int2);
System.out.println(str1 == str2);
System.out.println(str3 == str4);

What is the purpose of String Pool ? Don't you think it's a performance overhead to have unnecessary check for string in string pool ?

Why string pool concept has been introduced in string ?

Q2. what is covariant return type?

Core Java

Ans. co-variant return type states that return type of overriding method can be subtype of the return type declared in method of superclass. it has been introduced since jdk 1.5

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