JAVA MCQ Questions with answers and solutions Page 22

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Q. Identify the correct restriction on static methods.

1. They must access only static data
2. They can only call other static methods.
3. They cannot refer to this or super.

(A) 1 and 2
(B) 2 and 3
(C) Only 3
(D) 1, 2 and 3

💬 Discuss

✅ Correct Answer: (D) 1, 2 and 3

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Chandrakant

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Q. Identify the keyword among the following that makes a variable belong to a class,rather than being defined for each instance of the class.

(A) Final
(B) Static
(C) Volatile
(D) Abstract

💬 Discuss

✅ Correct Answer: (B) Static

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Q. Identify what can directly access and change the value of the variable res.

Code:

Package com.mypackage;
Public class Solution{
       Private int res = 100;
}

(A) Any class
(B) Only solution class
(C) Any class that extends solution
(D) None

💬 Discuss

✅ Correct Answer: (B) Only solution class

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Chandrakant

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Q. In which of the following is toString() method defined?

(A) java.lang.Object
(B) java.lang.String
(C) java.lang.util
(D) None

💬 Discuss

✅ Correct Answer: (A) java.lang.Object

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Q. compareTo() returns

(A) True
(B) False
(C) An int vale
(D) None

💬 Discuss

✅ Correct Answer: (C) An int vale

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Chandrakant

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Q. Identify the output of the following program

Code:

String str = “abcde”;
System.out.println(str.substring(1, 3));

(A) abc
(B) bc
(C) bcd
(D) cd

💬 Discuss

✅ Correct Answer: (B) bc

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Chandrakant

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Q. Identify the output of the following program.

Code:

String str = “Hellow”;
System.out.println(str.indexOf(‘t));

(A) 0
(B) 1
(C) true
(D) -1

💬 Discuss

✅ Correct Answer: (D) -1

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Chandrakant

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Q. Identify the output of the following program.

Code:

Public class Test{
          Public static void main(String argos[]){
                   String str1 = “one”;
                   String str2 = “two”;
                   System.out.println(str1.concat(str2));
          }
}

(A) one
(B) two
(C) ontwo
(D) twoone

💬 Discuss

✅ Correct Answer: (C) ontwo

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Chandrakant

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Q. What does the following string do to given string str1.

Code:

String str1 = “chandrakant”.replace(‘c’,’s’);

(A) Replaces single occurance of c to s
(B) Replaces all occurance of c to s
(C) Replaces single occurance of s to c
(D) None

💬 Discuss

✅ Correct Answer: (B) Replaces all occurance of c to s

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Chandrakant

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Q. To which of the following does the class string belong to.

(A) java.lang
(B) java.awt
(C) java.applet
(D) java.string

💬 Discuss

✅ Correct Answer: (A) java.lang

JAVA MCQs with answers Page - 22

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