Page 81 - CA_Blue( J )_Class9
P. 81

Ans.
                        a.             Fractional Number                               float or double
                        b.             A small Letter                                  char
                        c.             A sentence                                      String
                        d.             Long Integer                                    long
                    11.  Write down the data types in ascending order of size.
                     a.  byte                                      b.  long
                     c.  double                                    d.  short
                   Ans.  byte < short < long < double
                    12.  Name the operators listed below:
                     a.  <                                         b.  ++
                     c.  &&                                        d.  ?:
                   Ans.  a.  < (Less than operator)                b.  ++ (Increment operator)
                      c.  && (Logical AND operator)                d.  ?: (Conditional or Ternary operator)
                    13.  What are the default values of the primitive data type int and float?
                   Ans.  a.  Default value of int is 0.            b.  Default value of float is 0.0f.
                    14.  Identify the literals listed below: a. 0.5 b. ‘A’ c. false d. “a”
                   Ans.  a.  0.5 – Real Literal                    b.  ‘A’ – Character Literal
                      c.  false – Boolean Literal                  d.  “a” – String Literal
                    15.  What is the range of uppercase and lowercase letters?
                   Ans.  A–Z : 65 to 90                            a–z : 97 to 122
                    16.  Write  a  java  statement  to  calculate  and  print  the  temperature  in  centigrade  if  in  Fahrenheit  it  is  45  degree
                      ( (F-32)*5/9 ).
                   Ans.  System.out.println((45-32)/9.0*5.0);
                    17.  Write the syntax to declare a double variable “d” containing 45.9;
                   Ans.  double d=45.9;
                    18.  What does “\n” means in terms of escape sequence?
                   Ans.  “\n” means new line in terms of escape sequence.
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                 D.  Case Study.                                                           Century   #Experiential Learning
                                                                                             Skills
                     John is developing a basic calculator in Java that can perform addition, subtraction, multiplication, and division. He
                     writes the following code to perform arithmetic operations:
                       class Calculator {
                           public static void main() {
                               int a = 10;
                               int b = 5;
                               int sum = a + b;
                               int difference = a - b;
                               int product = a * b;
                               int quotient = a / b;
                               int remainder = a % b;
                               System.out.println("Sum: " + sum);
                               System.out.println("Difference: " + difference);
                               System.out.println("Product: " + product);
                               System.out.println("Quotient: " + quotient);
                               System.out.println("Remainder: " + remainder);


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