Blog

Question 1:  What is the main purpose of the Proxy object in JavaScript?

(A) To store data permanently

(B) To intercept and customize operations on objects

(C) To format strings automatically

Question 2:  Which method of Reflect is used to set a property value on an object?

(A) Reflect.set

(B) Reflect.assign

(C) Reflect.update

Question 3:  In Proxy traps, which trap is used to intercept reading a property value?

(A) get

(B) set

(C) has

Question 4:  What does Reflect.deleteProperty do?

(A) Deletes a variable from memory

(B) Deletes a property from an object

(C) Deletes a function from a script

Question 5:  Which trap is triggered when checking if a property exists using the 'in' operator?

(A) set

(B) has

(C) get

Question 6:  Which Reflect method works similar to Object.getOwnPropertyDescriptor?

(A) Reflect.ownKeys

(B) Reflect.getOwnPropertyDescriptor

(C) Reflect.getPrototypeOf

Question 7:  In Proxy, which trap intercepts writing a property value?

(A) get

(B) set

(C) apply

Question 8:  Which Reflect method returns all property keys of an object including symbols?

(A) Reflect.ownKeys

(B) Reflect.keys

(C) Reflect.getKeys

Question 9:  The apply trap in Proxy is used for which type of target?

(A) Function objects

(B) Array objects

(C) String objects

Question 10:  What does Reflect.has method do?

(A) Checks if a property exists in an object

(B) Checks if an object has a method

(C) Checks if an object is frozen