JAVA Test Prep - String Handling

Test Preparation on JAVA Test Prep. - String Handling

1.

Which of these class is superclass of String and StringBuffer class?

1java.util
2java.lang
3ArrayList
4None of the mentioned

2.

Which of this method of class String is used to obtain a length of String object?

1get()
2Sizeof()
3lengthof()
4length()

Explanation: Method length() of string class is used to get the length of the object which invoked method length().

3.

Which of these method of class String is used to extract a single character from a String object?

1CHARAT()
2chatat()
3charAt()
4ChatAt()

4.

Which of these constructors is used to create an empty String object?

1String()
2String(void)
3String(0)
4None of the mentioned

5.

Which of these is an incorrect statement?

1String objects are immutable, they cannot be changed
2String object can point to some other reference of String variable
3StringBuffer class is used to store string in a buffer for later use
4None of the mentioned

Explanation: StringBuffer class is used to create strings that can be modified after they are created.

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