1
Q
This section of our 1000+ Java MCQs focuses on String class of Java Programming Language.
- String in Java is a?
a) class
b) object
c) variable
d) character array
A
a
2
Q
- Which of these method of String class is used to obtain character at specified index?
a) char()
b) Charat()
c) charat()
d) charAt()
A
d
3
Q
- Which of these keywords is used to refer to member of base class from a subclass?
a) upper
b) super
c) this
d) none of the mentioned
A
b
4
Q
- Which of the following statements are incorrect?
a) String is a class
b) Strings in java are mutable
c) Every string is an object of class String
d) Java defines a peer class of String, called StringBuffer, which allows string to be altered
A
b
5
Q
class string_demo
{
public static void main(String args[])
{
String obj = "I" + "like" + "Java";
System.out.println(obj);
}
}
a) I
b) like
c) Java
d) IlikeJava
A
d
6
Q
class string_class
{
public static void main(String args[])
{
String obj = “I LIKE JAVA”;
System.out.println(obj.charAt(3));
}
}
a) I
b) L
c) K
A
a
7
Q
class string_class
{
public static void main(String args[])
{
String obj = "I LIKE JAVA";
System.out.println(obj.length());
}
}
a) 9
b) 10
c) 11
d) 12
A
c
8
Q
class string_class
{
public static void main(String args[])
{
String obj = "hello";
String obj1 = "world";
String obj2 = obj;
obj2 = " world";
System.out.println(obj + " " + obj2);
}
}
a) hello hello
b) world world
c) hello world
d) world hello
A
c
9
Q
class string_class
{
public static void main(String args[])
{
String obj = "hello";
String obj1 = "world";
String obj2 = "hello";
System.out.println(obj.equals(obj1) + " " + obj.equals(obj2));
}
}
a) false false
b) true true
c) true false
d) false true
A
d
10
Q
1. String class belongs to \_\_\_\_\_\_\_\_\_\_ package A java.awt
B java.lang
C java.applet
D java.string
A
b
11
Q
. Which of the following methods of the “StringBuffer” class is used to find the length of a String? A length()
B Length()
C Capacity()
D capacity()
A
a
