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C Language
C++ language
JAVA
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( 1 ) which of the following is the reference data type ?
- 1) int
- 2) short
- 3) double
- 4) array
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( 2 ) Which of these occupy first 0 to 127 in Unicode character set used for characters in Java?
- 1) ASCII
- 2) ISO-LATIN-1
- 3) Both 1 & 2
- 4) None of these
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Show Answer Report Discussion in forumAnswer : 3) Both 1 & 2
Solution : First 0 to 127 character set in Unicode are same as those of ISO-LAIN-1 and ASCII.
discussion
Answer : 3) Both 1 & 2
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( 3 ) What is the output of the following program?
class A{
public static void main(String args[]){
byte b;
int i = 258;
double d = 325.59;
b = (byte) i;
System.out.print(b);
i = (int) d;
System.out.print(i);
b = (byte) d;
System.out.print(b);
}
} - 1) 258 325 325
- 2) 258 326 326
- 3) 2 325 69
- 4) Error
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Show Answer Report Discussion in forumAnswer : 3) 2 325 69
Solution :
discussion
Answer : 3) 2 325 69
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( 4 ) Which of the following line will not compile assuming b1, b2 and b3 are byte variables and J is Int variable?
- 1) b1 = 3;
- 2) b3 = b1 * b2;
- 3) b3 = 10 * b1;
- 4) b2 = (byte) j;
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Show Answer Report Discussion in forumAnswer : 3) b3 = 10 * b1;
Solution : 10 is an integer variable and b1 is a byte variable. The multiplication of these two results an integer variable which cannot be stored in b3
discussion
Answer : 3) b3 = 10 * b1;
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( 5 ) Determine output:
public class Test{
int a = 10;
public void method(int a){
a += 1;
System.out.println(++a);
}
public static void main(String args[]){
Test t = new Test();
t.method(3);
}
} - 1) 4
- 2) 5
- 3) 12
- 4) 11
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( 6 ) Which of these can not be used for a variable name in Java?
- 1) identifier
- 2) keyword
- 3) identifier & keyword
- 4) None of these
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Show Answer Report Discussion in forumAnswer : 2) keyword
Solution : Keywords are specially reserved words which can not be used for naming a user defined variable, example : class, int, for etc.
discussion
Answer : 2) keyword
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( 7 ) Which of these literals can be contained in a data type float variable?
- 1) 1.7e-308
- 2) 3.4e-038
- 3) 1.7e+308
- 4) 3.4e-050
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Show Answer Report Discussion in forumAnswer : 2) 3.4e-038
Solution : Range of data type float is 3.4e-038 to 3.4e+308
discussion
Answer : 2) 3.4e-038
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( 8 ) class Datatype {
public static void main(String[] args) {
byte number=0101;
System.out.print(number);
}
}
What will be the output when you compile and run the above code? - 1) 101
- 2) 65
- 3) 5
- 4) Compiler error
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( 9 ) Default value of character data type in Java Programming is ___________________.
- 1) undefine
- 2) null
- 3) 0
- 4) '\u0000'
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Show Answer Report Discussion in forumAnswer : 4) '\u0000'
Solution :
discussion
Answer : 4) '\u0000'
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( 10 ) Automatic type conversion in Java takes place when
- 1) Two type are compatible and size of destination type is shorter than source type
- 2) Two type are compatible and size of destination type is equal of source type
- 3) Two type are compatible and size of destination type is larger than source type.
- 4) All of the above
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Show Answer Report Discussion in forumAnswer : 3) Two type are compatible and size of destination type is larger than source type.
Solution :
discussion
Answer : 3) Two type are compatible and size of destination type is larger than source type.
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