Week 3 Unit 4: Self-test
Last updated:
(05. April 2024)
Question 1
What is the purpose of a safe dictionary access?
Note: There are 3 correct answers to this question.
Safe dictionary access reduces the probability of being infected by a virus.
❌Safe dictionary access prevents access to keys, that do not exist.
✅Safe dictionary access limits the probability of wrong user input.
❌Safe dictionary access hides the actual access behind a condition, which checks the existence of the key.
✅Safe dictionary access should be used if it is not clear which keys are used to access a dictionary, for example, if the key is taken by user input.
✅Question 2
What is the value of variable a after the following statements have been executed?
