CodeHS - Unit 2: Lessons 1 - 3

Which is the correct way to declare an integer variable?

• int x = 3;

• integer x = 3;

• integer x is 3;

• int x is 3;

Which is the correct numeric java type to use for decimals?

• Integer

• Double

• Char

• Boolean

• String

Which variable declaration below is correct?

• int a = 4.5;

• char grade = 95;

• int a = 3/4;

• char grade = 'A';

Which option correctly declares a string variable?

• String name = Chris;

• string name = "Chris";

• string name = 'Chris';

• String name = "Chris";

• String name = 'Chris';

Which variable name is invalid?

• eightName

• _8name

• 8name

• $eightname

Which is the correct way to obtain user input for a string?

• readLine()

• readInt()

• readDouble()

• readBoolean()

You must use quotations around a prompt in a readLine().

Example:

readLine("What's your name?");

• True

• False

Which code segment will print “Hello Karel” to the screen in Java?

• System.out.printLine("Hello Karel");

• print "Hello Karel";

• System.out.println("Hello Karel");

• System.println("Hello Karel");

What will this code segment output?

System.out.println("Hello");

System.out.println("World");

• Hello

  World

• HelloWorld

• Hello World

• Hello

  
  

  World

Which of the below is not a primitive type in Java?

• int

• char

• boolean

• line

• double