1
Who invented Java Programming?
Correct Answer
James Gosling
ā MCQ PRACTICE
Java Programming Part 0
Practice objective questions for quick revision and examination preparation. Try answering each question before revealing the answer.
Java Programming - Part-0
2
Which component is used to compile, debug and execute the java programs?
Correct Answer
JDK
3
Which one of the following is not a Java feature?
Correct Answer
Use of pointers
4
Which of these cannot be used for a variable name in Java?
Correct Answer
keyword
5
Which of the following is a type of polymorphism in Java Programming?
Correct Answer
Compile time polymorphism
6
Which of these are selection statements in Java?
Correct Answer
if()
7
Which of the following is a superclass of every class in Java?
Correct Answer
Object class
8
Which one of the following is not an access modifier?
Correct Answer
Void
9
What is the numerical range of a char data type in Java?
Correct Answer
0 to 65535
10
In which process, a local variable has the same name as one of the instance variables?
Correct Answer
Variable Shadowing
11
What do you mean by nameless objects?
Correct Answer
An object that has no reference.
12
Which option is false about the final keyword?
Correct Answer
A final class cannot extend other classes.
13
In which memory a String is stored, when we create a string using new operator?
Correct Answer
Heap memory
14
Which of the given methods are of Object class?
Correct Answer
notify(), notifyAll(), and wait()
15
What is the initial quantity of the ArrayList list?
Correct Answer
10
16
What is meant by the classes and objects that dependents on each other?
Correct Answer
Tight Coupling
17
Which of this keyword must be used to inherit a class?
Correct Answer
extends
18
A class member declared protected becomes a member of subclass of which type?
Correct Answer
private member
19
Which of these is correct way of inheriting class A by class B?
Correct Answer
class B extends A {}
20
Which of these keyword is used to refer to member of base class from a sub class?
Correct Answer
super
21
Which inheritance in java programming is not supported?
Correct Answer
Multiple inheritance using classes
22
Which of these keywords can be used to prevent inheritance of a class?
Correct Answer
final
23
Which of these class relies upon its subclasses for complete implementation of its methods?
Correct Answer
abstract class
24
Properties are implemented using ___ in Java.
Correct Answer
Variables
25
Creating an object from a class is also called ____.
Correct Answer
Instantiating
26
An object is created at __ time in Java.
Correct Answer
Run time
27
Which of the following statements is a valid declaration of an object that belongs to "MyClass"?
Correct Answer
MyClass obj = new MyClass();
28
Which of these operators is used to allocate memory for an object?
Correct Answer
new
29
____________________ is the address of the memory location where the object is stored
Correct Answer
Reference
30
There is a special portion of memory called the _____________ where the object lives.
Correct Answer
Heap
31
When an object is created, in addition of allocating memory, a special method called ________________ is executed to perform initial task.
Correct Answer
Constructor
32
Every ________________ has it's own set of data
Correct Answer
Object
33
Java has a garbage collector that looks for unused _____________ and reclaims the memory that those objects are using.
Correct Answer
Objects
34
Protection of data is possible with the use of access __________________
Correct Answer
Modifiers
35
_____________________ variables can be accessed without creating an instance of a class
Correct Answer
static
36
Object-oriented programming languages provides reusability feature using _____________
Correct Answer
Inheritance
37
Inheritance models __________________ relationship between two classes.
Correct Answer
is-a
38
___________________ refers more than one method having same name but different parameters?
Correct Answer
Method overloading
39
___________________ members are available as 'private' members in the inherited sub class
Correct Answer
protected
40
___________________ variables are variables defined within a class but outside any method.
Correct Answer
Instance
41
Which of these jump statements can skip processing the remainder of the code in its body for a particular iteration?
Correct Answer
continue
42
Which of the following is not a decision making statement?
Correct Answer
do-while
43
Which of these class is superclass of String and StringBuffer class?
Correct Answer
java.lang
44
Which of this method of class String is used to obtain a length of String object?
Correct Answer
length()
45
Which of these method of class String is used to extract a single character from a String object?
Correct Answer
charAt()
46
Which of these constructors is used to create an empty String object?
Correct Answer
String()
47
Which of these method of class String is used to compare two String objects for their equality?
Correct Answer
equals()
48
Which feature comes under compile time polymorphism?
Correct Answer
Both A and B
49
Final keyword in java is used with
Correct Answer
All of the above
50
Which of these keywords can be used to prevent Method overriding?
Correct Answer
final
51
Which of these keywords is used to define interfaces in Java?
Correct Answer
interface
52
Which of these packages contains the exception Stack Overflow in Java?
Correct Answer
java.lang
53
An interface with no fields or methods is known as a ______.
Correct Answer
Marker Interface
54
Which keyword is used for accessing the features of a package?
Correct Answer
import
55
Correct statement about a class and interface is/are
Correct Answer
All of the above.
56
Which of the following is the correct way of importing an entire package āpkgā?
Correct Answer
import pkg.*
57
Which of the following package stores all the standard java classes?
Correct Answer
java
58
Which of these access specifiers can be used for an interface?
Correct Answer
Public
59
What kind of methods does an interface contain by default?
Correct Answer
abstract
60
A Java static method can not be ___.
Correct Answer
All the above
61
Package in Java is a mechanism to encapsulate a ______________.
Correct Answer
All of the above
62
Packages that are inside another package are the _________
Correct Answer
subpackages
63
Which one is correct declaration for implementing two interfaces?
Correct Answer
class C implements A, B
64
ā¦ā¦ā¦ā¦ Environment variable identifies the location of Java compiler?
Correct Answer
PATH
65
PATH environment variable can be set using ______ .
Correct Answer
Both A and B
66
How to display value of PATH environment variable at command line?
Correct Answer
Set PATH
67
PATH environment variable identifies the location of ______
Correct Answer
All of the above