VEX Data Types 1

What is a common data type in VEX?

• Integer
• Vector
• Float
• All of the above

Answer explanation

VEX supports data types like Integer, Vector, and Float, among others.

How do you declare a vector variable in VEX?

• int v = 0;
• vector v;
• float3 v;
• vec3 v;

Answer explanation

In VEX, vector variables are declared with 'vector' followed by the variable name.

Which data type is used for storing a true/false value in VEX?

• Boolean
• Int
• Float
• Vector

Answer explanation

Boolean is used for storing true/false values in VEX.

What is the default value for an uninitialized float in VEX?

• 0
• 1
• -1
• Undefined

Answer explanation

The default value for an uninitialized float in VEX is 0.0.

What is an attribute in VEX?

• A user-defined variable
• A parameter on a node
• A piece of data associated with geometry
• A shader function

Answer explanation

Attributes are pieces of data associated with geometry in Houdini.

How do you define a variable in VEX?

• By declaring and assigning a value
• Using an external file
• Through a VOP network
• By creating a custom node

Answer explanation

Variables in VEX are defined by declaring their type and assigning a value.

What is the purpose of the @ symbol in VEX?

• To access global variables
• To declare a vector
• To comment out code
• To initialize arrays

Answer explanation

The @ symbol is used in VEX to access global variables or attributes.

Which of these is not a valid data type in VEX?

• Matrix
• Vector4
• Array
• StringBuilder

Answer explanation

StringBuilder is not a valid data type in VEX.

What is the correct way to declare a matrix in VEX?

• matrix m;
• float m[4][4];
• matrix4 m;
• mat4 m;

Answer explanation

In VEX, a matrix is declared using the 'matrix' keyword.

What does the function set() do in VEX?

• Sets a global variable
• Creates a vector or point
• Assigns a value to a float
• Initializes an array

Answer explanation

The set() function in VEX is used to create vectors or points.