Java Design Patterns and Streams Quiz 12: Test Your Knowledge on Code Structure and Stream Operations

Quiz 12Due Dec 02, 2023 at 11:45amPoints 40Questions 20Time Limit 75 MinutesQuestion 12 ptsWhat is the purpose of design patterns in Java?Improve code readabilityEnhance code performanceCProvide solutions to recurring design problemsImplement security features Question 22 ptsWhich design pattern is used to provide a simple way to createobjects in a system?SingletonFactoryObserverPrototypeQuestion 32 ptsWhat is the purpose of the 'super' keyword in Java?Invoke the superclass constructorRefer to the current class instanceAccess superclass methodsInitialize static variables Question 42 ptsWhat does the term 'generic' mean in the context of Javaprogramming?A type-safe way to work with different data typesA specific data type for all variablesA keyword for dynamic typingA way to handle exceptionsQuestion 52 ptsWhich class is a part of the Java Collections Framework andimplements a dynamic array?LinkedListHashSetArrayListTreeMap Question 62 ptsWhat is the purpose of lambda expressions in Java?Define anonymous classesSimplify the syntax for creating instances of functional interfacesAccess private class membersImplement multiple inheritanceQuestion 72 ptsWhich interface is a functional interface in Java?RunnableSerializableCloneableFunctional Question 82 ptsIn Java Streams, what does the 'map' operation do?Filter elements based on a predicateTransform each element using a given functionSort elements in natural orderMerge multiple streamsQuestion 92 ptsWhich method is used to collect elements from a Stream into aCollection in Java?gather()join()collect()combine() Question 102 ptsWhat is the primary purpose of the 'flatMap' operation in JavaStreams?Flatten nested streams into a single streamMap each element to its squareFilter elements based on a predicateMerge multiple streamsQuestion 112 ptsWhat is the significance of the '@FunctionalInterface annotation inJava?Marks a class as finalIndicates that the interface is intended to be a functionalinterfaceDenotes a static methodRepresents a marker interface Question 122 ptsWhich design pattern is used to define a one-to-many dependencybetween objects?CObserverSingletonAdapterDecoratorQuestion 132 ptsWhat is the purpose of the 'filter' operation in Java Streams?Transform each element using a given functionRemove elements based on a predicateSort elements in natural orderMerge multiple streams Question 142 ptsWhich class is responsible for sorting elements in a natural order inJava Streams?ComparatorSorterOrderByComparableQuestion 152 ptsWhat is the purpose of the 'forEach' operation in Java Streams?Filter elements based on a predicateIterate over each element and perform an actionTransform each element using a given functionMerge multiple streams Question 162 ptsWhich design pattern is used to provide an interface for creatingfamilies of related or dependent objects?SingletonFactoryObserverAbstract FactoryQuestion 172 ptsIn Java, what is the purpose of the 'super' keyword in a constructor?eInvoke the superclass constructorRefer to the current class instanceAccess superclass methodsInitialize static variables Question 182 ptsWhat is the primary advantage of using generics in Java?Improved code performanceEnhanced type safetySimplified syntaxDynamic typingQuestion 192 ptsWhich method is used to remove an element from an ArrayList inJava?removeElement()deleteElement()remove()erase() Question 202 ptsWhat does the term lambda expression' mean in Java?An anonymous inner classA concise way to express instances of single-method interfacesA type of exception handlingA keyword for defining generic types