
Java Programming Fundamentals
Quiz
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Computers
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University
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Practice Problem
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Medium
CM Varun
Used 1+ times
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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the four main data types in Java?
int, char, double, boolean
array, set, map, tuple
float, string, long, short
byte, decimal, object, list
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain the difference between 'if' and 'switch' control structures in Java.
'if' is used for looping, while 'switch' is for single conditions.
'if' is faster than 'switch' for large datasets, making it more efficient.
The 'if' structure is for conditional checks, while 'switch' is for selecting among multiple cases based on a variable's value.
'if' can only evaluate boolean expressions, whereas 'switch' can evaluate any data type.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is encapsulation in Object-Oriented Programming?
Encapsulation is the bundling of data and methods that operate on that data, restricting direct access to some of the object's components.
Encapsulation is the method of exposing all data members of a class to the outside world.
Encapsulation is the process of creating multiple instances of a class.
Encapsulation refers to the inheritance of properties from a parent class.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of an interface in Java?
To define a contract for classes to implement, allowing for abstraction and multiple inheritance.
To allow classes to inherit from multiple classes directly.
To provide a way to create objects without defining methods.
To serve as a blueprint for creating new data types.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you declare an abstract class in Java?
abstract ClassName() {}
class ClassName abstract {}
class abstract ClassName {}
abstract class ClassName {}
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of the 'extends' keyword in Java?
The 'extends' keyword is used for method overloading in Java.
The 'extends' keyword is a way to define interfaces in Java.
The 'extends' keyword signifies class inheritance in Java.
The 'extends' keyword is used to create static methods in Java.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the difference between ArrayList and LinkedList in Java?
ArrayList is better for random access, while LinkedList is better for frequent insertions and deletions.
LinkedList is faster for random access than ArrayList.
ArrayList uses less memory than LinkedList.
ArrayList allows for dynamic resizing while LinkedList does not.
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