Java Programming Advanced Quiz 5
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Advanced Quiz 5
1. What is the purpose of the @SafeVarargs annotation?
Suppresses warnings for varargs parameterized types
Ensures thread safety
Allows unchecked casts
2. Which method is used to get the number of available processors?
Runtime.getRuntime().availableProcessors()
System.availableProcessors()
Thread.availableProcessors()
3. Which Java feature allows code to be executed before the main method?
Static initializer block
Constructor
Instance initializer block
4. Which class is used for pattern matching with regular expressions?
Pattern
Matcher
Scanner
5. Which method is used to force garbage collection?
System.gc()
Runtime.runGC()
GarbageCollector.collect()
6. What is the main advantage of using WeakHashMap?
Keys can be garbage collected when not referenced elsewhere
It is faster than HashMap
It is thread-safe
7. Which interface is used for splitting tasks in parallel streams?
Spliterator
Partitioner
Divider
8. Which method is used to obtain a stream from a Map's values?
map.values().stream()
map.stream()
map.valueStream()
9. What does the @Override annotation enforce?
Method signature matches overridden method
Makes method thread-safe
Prevents method overriding
10. Which class provides CAS (Compare-And-Swap) operations?
AtomicReference
ConcurrentHashMap
ReentrantLock
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