Data Types & Variables
1.Which of the following is not a primitive data type in Java?
-
A. int
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B. float
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C. String
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D. boolean
String
String
2. What is the default value of an int variable in Java?
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A. 0
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B. null
-
C. 1
-
D. Undefined
0
0
3.What is the size of a char in Java?
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A. 1 byte
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B. 2 bytes
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C. 4 bytes
-
D. 8 bytes
2 bytes
2 bytes
4.Which of the following data types has the largest memory size?
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A. int
-
B. long
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C. float
-
D. double
double
double
5.What will be the output of the following code?
public class Main {
public static void main(String[] args) {
byte b = 127;
b++;
System.out.println(b);
}
}
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A. 127
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B. 128
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C. -128
-
D. Compilation error
-128
-128