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Java Autoboxing MCQs Questions | Java Program MCQs

Test your knowledge of Java Autoboxing with these multiple choice questions. Prepare effectively for Java-related examinations. Page-9 section-1

81
What should the return type of method where there is no return value?
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Answer & Solution
Answer: Option B
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82
What data structure should be used when number of elements is fixed?
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Answer: Option A
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83
What causes the program to exit abruptly and hence its usage should be minimalistic?
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Answer & Solution
Answer: Option C
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84
Which of the following is good coding practice to determine oddity?
i)
public boolen abc(int num)
{
	return num % 2 == 1;
}

ii)
public boolean xyz(int num)
{
	return (num & 1)!= 0;
 }
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Answer & Solution
Answer: Option B
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85
Which one of the following causes memory leak?
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Answer & Solution
Answer: Option D
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86
Which of the following is a best practice to measure time taken by a process for execution?
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Answer & Solution
Answer: Option B
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87
What one of the following is best practice to handle Null Pointer exception?
i) int noOfStudents = line.listStudents().count;
ii) int noOfStudents = getCountOfStudents(line);
public int getCountOfStudents(List line)
{
if(line != null)
    {
if(line.listOfStudents() != null)
            {
  return line.listOfStudents().size();
}
}
throw new NullPointerException("List is empty");
}
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Answer & Solution
Answer: Option B
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88
Which of the below is true about java class structure?
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Answer: Option C
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89
Which of the below is false about java coding?
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Answer: Option A
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90
Which is better in terms of performance for iterating an array?
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Answer: Option B
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