Prgramming MCQs Feed | Page - 1

Explanation

The toLowerCase method in Java converts a string to lowercase. In this case, sA)toLowerCase() returns “hello”.

Explanation

In Java, when two string literals are created with the same value, they refer to the same object in memory. Therefore, s1 and s2 both refer to the same “Hello” string object. The == operator checks if two variables refer to the same object in memory, so s1 == s2 returns true.

Explanation

In this case, s1 is a string literal and s2 is a string object created using the new keyworD) When a string object is created using the new keyword, a new object is created in memory even if the value is the same as an existing string. Therefore, s1 and s2 do not refer to the same object in memory, so s1 == s2 returns false.

Explanation

The equals method in Java checks if two strings have the same value. In this case, s1 and s2 both have the value “Hello”, so sA)equals(s2) returns true.

Explanation

The equalsIgnoreCase method in Java checks if two strings have the same value ignoring case. In this case, s1 has the value “Hello” and s2 has the value “hello”, but because the case is ignored, sA)equalsIgnoreCase(s2) returns true.

Explanation

The concat method in Java concatenates two strings together. In this case, sA)concat(s2)

Explanation

In Java, the + operator can be used to concatenate two strings. In this case, s1 + s2 returns “HelloWorld”.

Explanation

The charAt method in Java returns the character at a specified index in a string. In this case, sA)charAt(2) returns ‘l’.