Blockly trắc nghiệm 5 - Phan Thủy

What is the function of the "procedure" block in Blockly?

• A. Variable initialization

• B. Create a function

• C. Check the condition

• D. Repeat actions

In Blockly, how to use a global variable in multiple functions?

• A. Declare variables inside the function

• B. Declare variables outside all functions

• C. Declare variables in the main function

• D. Cannot use global variables

Which block in Blockly allows creating asynchronous events?

• A. Event blocks

• B. Callback blocks

• C. Promise blocks

• D. Async blocks

When using the "lists" block in Blockly, what method is used to add an element to the end of the list?

• A. lists_append

• B. lists_add

• C. lists_insert

• D. lists_push

What is the function of the "mutator" block in Blockly?

• A. Change the value of a variable

• B. Customize the structure of other blocks

• C. Call another function

• D. Create a loop

How to handle exceptions in Blockly?

• A. Use "try-catch" block

• B. Use the "error handling" block

• C. Use "catch" block

• D. Use "exception" block

In Blockly, to optimize program performance, what should you do when dealing with large loops?

• A. Use nested loops

• B. Use global variables

• C. Use the "loop optimization" block

• D. Reduce the number of loop executions and optimize the code within the loop

Which blocks in Blockly allow you to create and process complex data structures such as trees or graphs?

• A. Arrays

• B. Lists

• C. Custom data structures

• D. Objects

In Blockly, which blocks can you use to perform synchronization operations between parts of the program?

• B. Mutex blocks

• C. Synchronization blocks

• D. Threading blocks

When you want to create a custom block in Blockly, what do you need to do first?

• A. Determine the shape and parameters of the block

• B. Write the source code for the block

• C. Register the block in the Blockly library

• D. Create a user interface for the block