Java MCQ Quiz (Part - 4) | infoStud blogs

AAYUSH SHARMA May 01, 2021

Java MCQ Quiz (Part-4)

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. What is a class?

1. A class is a description of a type of object.
2. A class is part of an object that contains variables.
3. A class is a section of computer memory that contains objects.
4. A class is a section of the hard disk reserved for object-oriented programs.

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

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

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

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

4. What is an object?

1. An object is a very small location that contains only data.
2. “Object” is another word for “Program.”
3. An object is a piece of memory that may contain data along with methods to process the data.
4. An object is a description of a potential class.

5. 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.

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

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

7.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.

8. What is the class of the type wrapper for the primitive type int?

1. Integer
2. integer
3. INT
4. int

9. How many alternatives are there for a single if-else statement?

1. 2
2. 3
3.4
4. 5

10. Which three parts of a counting loop need to be coordinated in the right order for the loop to work properly?

1. The whilestatement, the ifstatement, the sequential execution
2. The whilestatement, the assignment, the loop body
3. Initialize counter, test counter, change counter
4. Initialize condition, change condition, end loop