Java Basics Assessment

What is Java primarily used for? a) Web development b) Mobile applications c) Game development d) All of the above

• g) Cloud computing

• f) Data analysis

• e) Desktop applications

• d) All of the above

What is the main method signature in a Java program? a) public static void main(String[] args) b) void main(String args[]) c) public void main(String args) d) static public void Main(String args[])

• a) public static void main(String[] args)

• public static main(String[] args)

• static void main(String args[])

• void main(String args)

Java programs are compiled into: a) Machine code b) Bytecode c) Assembly code d) Source code

• b) Bytecode

• d) Executable code

• c) Intermediate code

• a) High-level code

Which of the following is not a primitive data type in Java? a) int b) boolean c) String d) double

• c) String

• char

• float

• byte

What is the default value of a boolean variable in Java? a) 0 b) true c) false d) null

• c) false

• yes

• undefined

• 1

What keyword is used to define a constant variable in Java? a) static b) final c) const d) var

• readonly

• constant

• b) final

• immutable

What is the result of 5 / 2 in Java? a) 2.5 b) 2 c) 3 d) Compilation error

• b) 2

• 2.0

• 1

• 4

Which loop is guaranteed to execute at least once? a) for loop b) while loop c) do-while loop d) None of the above

• a) foreach loop

• b) repeat-until loop

• d) All loops execute at least once

• c) do-while loop

What is the size of an int in Java? a) 16 bits b) 32 bits c) 64 bits d) 8 bits

• 12 bits

• b) 32 bits

• 24 bits

• 48 bits

Which of the following is a valid identifier in Java? a) 1stVariable b) my-variable c) myVariable d) my variable

• variable1

• my_variable

• myVariable

• my-variable-name