Practice
Problems to sharpen your skills before a test or an interview. Try as often as you like: nothing here is seen by employers.
Solved 0 of 62
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| Problem | Area | Kind | Difficulty | Your progress |
|---|---|---|---|---|
| Escalation | Account management | Multiple choice | easy | Not tried |
| Activity lifecycle | Android | Multiple choice | easy | Not tried |
| Two sum | Arrays | Code | easy | Not tried |
| Add two numbers | Basics | Code | easy | Not tried |
| FizzBuzz | Basics | Code | easy | Not tried |
| Value and reference | C# | Multiple choice | easy | Not tried |
| Least privilege | Cloud | Multiple choice | easy | Not tried |
| Compare versions | DevOps | Code | easy | Not tried |
| Count errors in a log | DevOps | Code | easy | Not tried |
| Docker image vs container | DevOps | Multiple choice | easy | Not tried |
| Climbing stairs | Dynamic programming | Code | easy | Not tried |
| Stateless vs stateful | Flutter | Multiple choice | easy | Not tried |
| git pull | Git | Multiple choice | easy | Not tried |
| First letter that appears once | Hash maps | Code | easy | Not tried |
| Most common word | Hash maps | Code | easy | Not tried |
| String comparison | Java | Multiple choice | easy | Not tried |
| == and === | JavaScript | Multiple choice | easy | Not tried |
| typeof null | JavaScript | Multiple choice | easy | Not tried |
| Eloquent N+1 | Laravel | Multiple choice | easy | Not tried |
| WordPress hooks | PHP | Multiple choice | easy | Not tried |
| MVP | Product | Multiple choice | easy | Not tried |
| List comprehension | Python | Multiple choice | easy | Not tried |
| Mutable default | Python | Multiple choice | easy | Not tried |
| Keys in lists | React | Multiple choice | easy | Not tried |
| WHERE vs HAVING | SQL | Multiple choice | easy | Not tried |
| Find the position | Searching and sorting | Code | easy | Not tried |
| Storing passwords | Security | Multiple choice | easy | Not tried |
| Balanced brackets | Stacks and queues | Code | easy | Not tried |
| Palindrome check | Strings | Code | easy | Not tried |
| Reverse the words | Strings | Code | easy | Not tried |
| Roman numerals | Strings | Code | easy | Not tried |
| Valid anagram | Strings | Code | easy | Not tried |
| Unit vs integration | Testing | Multiple choice | easy | Not tried |
| HTTP status | Web | Multiple choice | easy | Not tried |
| Main thread | iOS | Multiple choice | easy | Not tried |