
Java Basics Challenge
Quiz
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Other
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University
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Practice Problem
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Easy
K Sathvik
Used 1+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the four main data types in Java?
decimal, integer, character, pointer
string, object, array, list
byte, short, int, long
float, double, char, boolean
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you declare a variable in Java?
declare
To declare a variable in Java, use the syntax:
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of the 'if' statement in Java?
The purpose of the 'if' statement in Java is to execute code conditionally based on a boolean expression.
To define a variable in Java.
To import libraries in Java.
To create a loop in Java.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain the concept of inheritance in Java.
Inheritance in Java allows a subclass to inherit properties and methods from a superclass, promoting code reuse and establishing a hierarchical relationship.
Inheritance in Java is used to define interfaces only.
Inheritance allows a class to create multiple instances of itself.
Inheritance restricts access to superclass methods and properties.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a try-catch block used for in Java?
To define variables in a method.
To improve code readability.
To handle exceptions and prevent program crashes.
To create new classes in Java.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Name two types of collections in the Java Collections Framework.
Map, Queue
Array, Stack
Tree, Graph
List, Set
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you read data from a file in Java?
Use Scanner to read data from a file.
Use PrintWriter to write data to a file.
Use FileReader and BufferedReader to read data from a file.
Use FileInputStream to read data from a file.
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