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Interfaces and Abstract Classes -Java Programming MCQ Questions and Answers

Learn competitive java programming mcq questions and answers on Interfaces and Abstract Classes with easy and logical explanations. Page-6 section-3

Each section contains 100 MCQs on Interfaces and Abstract Classes .
51
Which of these is a wrapper for data type int?
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Answer & Solution
Answer: Option A
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52
What is the signature of Math.random() method?
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Answer & Solution
Answer: Option A
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53
Which of these class contains only floating point functions?
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Answer & Solution
Answer: Option A
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54
Which of these classes can return more than one character to be returned to input stream?
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Answer & Solution
Answer: Option C
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55
Which of these classes is used for input and output operation when working with bytes?
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Answer & Solution
Answer: Option A
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56
Standard output variable 'out' is defined in which class?
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Answer: Option D
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57
Which of these class produce objects with respect to geographical locations?
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Answer: Option B
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58
What will be the output of the following Java code?
class binary 
{
     public static void main(String args[]) 
     {
         int num = 17;
         System.out.print(Integer.toBinaryString(num));
     }
}
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Answer: Option D
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59
Which of these classes encapsulate runtime state of an object?
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Answer: Option A
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60
Which of the following is method of System class is used to find how long a program takes to execute?
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Answer & Solution
Answer: Option C
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