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MCQs

Total Questions : 45 | Page 1 of 5 pages
Question 1. Java is a ........... language.
  1.    weakly typed
  2.    strongly typed
  3.    moderate typed
  4.    None of these
 Discuss Question
Answer: Option B. -> strongly typed
Question 2. In Java byte, short, int and long all of these are
  1.    signed
  2.    unsigned
  3.    Both of the above
  4.    None of these
 Discuss Question
Answer: Option A. -> signed
Question 3. How many primitive data types are there in Java?
  1.    6
  2.    7
  3.    8
  4.    9
 Discuss Question
Answer: Option C. -> 8
Question 4. Size of int in Java is
  1.    16 bit
  2.    32 bit
  3.    64 bit
  4.    Depends on execution environment
 Discuss Question
Answer: Option B. -> 32 bit
Question 5. The smallest integer type is ......... and its size is ......... bits.
  1.    short, 8
  2.    byte, 8
  3.    short, 16
  4.    short, 16
 Discuss Question
Answer: Option B. -> byte, 8
Question 6. Size of float and double in Java is
  1.    32 and 64
  2.    64 and 64
  3.    32 and 32
  4.    64 and 32
 Discuss Question
Answer: Option A. -> 32 and 64
Question 7. 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
 Discuss Question
Answer: Option C. -> Two type are compatible and size of destination type is larger than source type.
Question 8. Determine output:
class A{
public static void main(String args[]){
int x;
x = 10;
if(x == 10){
int y = 20;
System.out.print("x and y: "+ x + " " + y);
y = x*2;
}
y = 100;
System.out.print("x and y: " + x + " " + y);
}
}
  1.    10 20 10 100
  2.    10 20 10 20
  3.    10 20 10 10
  4.    Error
 Discuss Question
Answer: Option D. -> Error
Question 9. Which of the following automatic type conversion will be possible?
  1.    short to int
  2.    byte to int
  3.    int to long
  4.    long to int
 Discuss Question
Answer: Option C. -> int to long
Question 10. 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
 Discuss Question
Answer: Option C. -> 2 325 69

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