String comparison in Java - Practice Problems & Coding Challenges

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Challenge - 5 Problems

💻 code output

intermediate

Output of String equality check with == operator

What is the output of this Java code snippet?

Java

public class Main {
    public static void main(String[] args) {
        String a = "hello";
        String b = "hello";
        System.out.println(a == b);
    }
}

A true

B false

C Compilation error

D Runtime exception

💻 code output

intermediate

Output of String equality check with new operator

What is the output of this Java code snippet?

Java

public class Main {
    public static void main(String[] args) {
        String a = new String("hello");
        String b = new String("hello");
        System.out.println(a == b);
    }
}

A true

B Runtime exception

C Compilation error

D false

💻 code output

advanced

Output of equals() method for String comparison

What is the output of this Java code snippet?

Java

public class Main {
    public static void main(String[] args) {
        String a = new String("hello");
        String b = "hello";
        System.out.println(a.equals(b));
    }
}

A true

B false

C Compilation error

D Runtime exception

💻 code output

advanced

Output of compareTo() method for String comparison

What is the output of this Java code snippet?

Java

public class Main {
    public static void main(String[] args) {
        String a = "apple";
        String b = "banana";
        System.out.println(a.compareTo(b));
    }
}

A 0

B Negative integer

C Positive integer

D -1

💻 code output

expert

Output of String interning and == operator

What is the output of this Java code snippet?

Java

public class Main {
    public static void main(String[] args) {
        String a = new String("test");
        String b = a.intern();
        String c = "test";
        System.out.println(a == b);
        System.out.println(b == c);
    }
}

A false\nfalse

B true\ntrue

C false\ntrue

D true\nfalse