Java MCQ Quiz (Part - 5) | infoStud blogs

Following quiz provides Multiple Choice Questions (MCQs) related to Core Java. You will have to read all the given answers and click over the correct answer. Correct answer will be highleted with green colour and wrong answer will be highleted with red colour.

1. Which of the following is not a correct arithmetic expression?

1. alpha (/ impuls – 12.4)
2. alpha
3. (alpha / impulse) – 12.4
4. ((alpha / impuls) – 12.4)

2. What is an operand?

1. Another name for a number.
2. Another name for an integer.
3. A value that an operator acts on.
4. One of the arithmetic symbols like *, +, – and /.

3. Which of the following expressions is not evaluated as a floating-point operation?

1. a + b
2. x / y
3. a + x
4. 1.5 + 8.6

4. Which of the following declarations for the constant PI is correct (assuming that the value is correct)?

1. constant double PI = 3.14159265358979;
2. “double PI = 3.14159265358979;”
3. final double PI = 3.14159265358979;
4. final PI = 3.14159265358979;

5. How many objects of a given class can be constructed in a program?

1.As many as the program requires.
2. Only one object is constructed per run.
3. Only one per class.
4. One object per variable.

6. Which of the following is a correct way Stringto construct an object?

1. String alpha (“Hello Quiz!”);
2. Eg String = “Hello Quiz!” ;
3. String alpha = new String (“Hello Quiz!”);
4. String alpha = new “Hello Quiz!” ;

7. Do any objects exist at the moment a program is about to start?

1. No. Objects are created one at a time when the program is running.
2. Yes. All objects describing the program are generated when the program starts to start.
3. Yes. All objects describing the program are generated when the program is compiled.
4. no. Objects are a way of thinking about programming, but they do not really exist.

8. Which of the following calls the method of length()the object strreferenced by and stores the result in wert?

1. value = str.length ();
2. Eg value = length.str ();
3. value = length (). Str;
4. value = length (str);

9. What is a reference to an object?

1. Data where the object can be found.
2. One of the methods of the object.
3.One of the variables of the object.
4. A place in a program that creates the object.

10. Assuming that a random number Random rand = Random()generator was created. Which of the following selects an integer from the range 0, 1, 2, 3, 4, 5, 6, 7, 8, 9?

1. rand.nextInt(9)
2. rand.nextInt()*10
3. rand.nextInt(10)
4. rand.nextInt(1,10)

Also Attempt

• Java MCQ Quiz (Part - 1)
• Java MCQ Quiz (Part - 2)
• Java MCQ Quiz (Part - 3)
• Java MCQ Quiz (Part - 4)
• Java MCQ Quiz (Part - 6)
• Java MCQ Quiz (Part - 7)
• Java MCQ Quiz (Part - 8)
• Java MCQ Quiz (Part - 9)