
Java Data Types and String Manipulation
Quiz
•
Computers
•
12th Grade
•
Practice Problem
•
Medium
JAYA SUDIKSHA
Used 1+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What are the four main primitive data types in Java?
char, int, long, object
int, boolean, char, double
int, float, boolean, string
float, string, byte, short
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
How do you declare a variable in Java?
variableName dataType;
dataType: variableName;
var variableName;
dataType variableName;
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What is the default value of a boolean variable in Java?
true
false
null
1
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Explain the difference between 'int' and 'Integer' in Java.
'int' can hold null values; 'Integer' cannot.
'int' is a reference type; 'Integer' is a primitive type.
Both 'int' and 'Integer' are the same and interchangeable.
'int' is a primitive type; 'Integer' is a wrapper class.
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What is the purpose of the 'final' keyword when declaring a variable?
The 'final' keyword is used to declare a variable that can hold multiple data types.
The 'final' keyword allows a variable to be reassigned multiple times.
The 'final' keyword makes a variable accessible only within its own method.
The 'final' keyword makes a variable immutable, preventing it from being reassigned after its initial assignment.
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What is the output of the following code: int x = 5; System.out.println(x++);?
4
6
5
5.0
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What is the scope of a variable declared inside a method?
Static scope limited to the class.
Local scope within the method only.
Global scope accessible throughout the program.
Block scope only within the nearest curly braces.
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