Java syntax
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20 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What symbol is used to end a Java statement?
.
;
:
!
Answer explanation
Java statements end with a semicolon (;).
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
How many primitive data types does Java have?
6
7
8
9
Answer explanation
Java has 8 primitive data types: byte, short, int, long, float, double, char, and boolean.
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What happens if a local int variable is used without initialization?
It is initialized to 0.
It retains a garbage value.
It causes a compilation error.
It is initialized to -1.
Answer explanation
"Local variables in Java must be explicitly initialized before use, as they do not have default values. Attempting to use an uninitialized local variable results in a compilation error.
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is the size of the 'int' data type in Java?
2 bytes
4 bytes
8 bytes
16 bytes
Answer explanation
The 'int' data type in Java occupies 4 bytes (32 bits).
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What will this print?
int x = 5; int y = 3; System.out.println(x - y);
1
2
3
4
Answer explanation
The difference between x (5) and y (3) is 2.
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Identify the error in this code:
int num; System.out.println(num);
Variable not initialized
Syntax error in declaration
Variable out of scope
Data type mismatch
Answer explanation
Local variables like num must be explicitly initialized before use.
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is the output of this code? System.out.println("Java " + "Programming");
Java Programming
Java & Programming
JavaProgramming
Programming in Java
Answer explanation
The + operator concatenates the two strings, resulting in Java Programming.
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