T_4.2 Identifier, Data Types, Operators & Expressions

Identify VALID identifier.

• 24Century

• sum_&_difference

• double

• MyVariable

Create a variable called myNum of type int and assign it the value 15

(a)  

Declare a constant for PI with value 3.142

(a)  

Tick all the Java reserved words.

• enum

• const

• float

• num

Select primitive data types.

• int

• float/double

• boolean

• char

• String

What is the function for escape sequence \n ?

• insert a tab in the text

• insert a new line in the text

• insert a new space in the text

• insert a double line in the text

It is given that

a = 5, b = 2, c = 4 and d = 6

What is the result for this relational expressions?

a * c != d * b

• true

• false

Check whether the following expression return true or false.

(5 > 3) && (8 < 5)

• true

• false

Which one is arithmetic expression?

• 3 == 5

• b * c - d

• !(a > b)

• (a * x * x + b) / ((c * x + d)

• (a * Math.pow(x,2) + b) / (c * x + d)

• ((a)(x)(x) + (b)) / ((c)(x) + d)

• (b + x *(x * (a))) / (d + x * (c))