Java Final Exam Questions and Answers with Certified Solutions

Java Final Exam Questions and Answers with Certified Solutions Which of the following correctly defines an abstract class in Java? A. `abstract class Vehicle {}` B. `class abstract Vehicle {}` C. `Vehicle abstract class {}` D. `@Abstract Vehicle {}` A. `abstract class Vehicle {}` Which of the following keywords is used to prevent a method from being overridden? A. static B. final C. abstract D. private B. final Which operator is used for bitwise AND in Java? A. & 2 B. && C. | D. ^ A. & Which method is called automatically when an object is created? A. finalize() B. constructor C. start() D. init() B. constructor Which Java package contains the Scanner class? A. B. C. D. C. 3 Which of the following statements about Java interfaces is true? A. Interfaces can have constructors B. Interfaces can contain instance variables C. Interfaces can have static methods D. Interfaces can be instantiated directly C. Interfaces can have static methods Which of the following correctly declares a Java generic class? A. `class BoxT {}` B. `class Box {}` C. `generic class BoxT {}` D. `class Box{T} {}` A. `class BoxT {}` Which of the following is NOT a valid Java identifier? A. _variableName B. 123variable 4 C. variable_123 D. $variable B. 123variable Which keyword is used to inherit a class in Java? A. implements B. extends C. inherits D. override B. extends Which of the following is a valid return type for a Java method? A. method B. void C. return D. static B. void 5 Which of the following statements is true about Java exceptions? A. All exceptions must be caught B. Java supports both checked and unchecked exceptions C. Exceptions cannot be thrown manually D. Only runtime exceptions can be caught B. Java supports both checked and unchecked exceptions Which of the following loops will always execute at least once? A. for B. while C. do-while D. foreach C. do-while Which of the following is a valid Java main