JAVA MCQs with answers Page - 26

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📊 JAVA
Q. Which of the following statements is correct?
  • (A) Public method is accessible to all other classes in the hierarchy
  • (B) Public method is accessible only to subclasses of its parent class
  • (C) Public method can only be called by object of its class.
  • (D) Public method can be accessed by calling object of the public class.
💬 Discuss
✅ Correct Answer: (A) Public method is accessible to all other classes in the hierarchy
📊 JAVA
Q. Program which executes applet is known as
  • (A) applet engine
  • (B) virtual machine
  • (C) JVM
  • (D) None of above
💬 Discuss
✅ Correct Answer: (A) applet engine
📊 JAVA
Q. You read the following statement in a Java program that compiles and executes. submarine.dive(depth); What can you say for sure?
  • (A) Depth must be an int
  • (B) Dive must be a method.
  • (C) Dive must be the name of an instance fie
  • (D) None of the above
💬 Discuss
✅ Correct Answer: (B) Dive must be a method.
📊 JAVA
Q. Which is true about an anonymous inner class?
  • (A) It can extend exactly one class and implement exactly one interface.
  • (B) It can extend exactly one class and can implement multiple interfaces.
  • (C) It can implement multiple interfaces regardless of whether it also extends a class.
  • (D) none
💬 Discuss
✅ Correct Answer: (B) It can extend exactly one class and can implement multiple interfaces.
📊 JAVA
Q. f a thread is to be declared as a daemon thread, it must be declared before
  • (A) start method
  • (B) run method
  • (C) stop method
  • (D) none
💬 Discuss
✅ Correct Answer: (A) start method
📊 JAVA
Q. Under what circumstances might you use the yield method of the Thread class
  • (A) To call from the currently running thread to allow another thread of the same or higher priority to run
  • (B) To call on a waiting thread to allow it to run
  • (C) To allow a thread of higher priority to run
  • (D) To call from the currently running thread with a parameter designating which thread should be allowed to run
💬 Discuss
✅ Correct Answer: (A) To call from the currently running thread to allow another thread of the same or higher priority to run
📊 JAVA
Q. Which of the following is the correct syntax for suggesting that the JVM performs garbage collection?
  • (A) System.free();
  • (B) System.setGarbageCollection();
  • (C) System.out.gc();
  • (D) System.gc();
💬 Discuss
✅ Correct Answer: (D) System.gc();
📊 JAVA
Q. A class that cannot be a subclass is called as______ class.
  • (A) abstract
  • (B) parent class
  • (C) Final
  • (D) none of these
💬 Discuss
✅ Correct Answer: (C) Final
📊 JAVA
Q. When method defined in subclass which has same signature as a method in a super class, it is known as method
  • (A) Overloading
  • (B) Overriding
  • (C) Packing
  • (D) None of these
💬 Discuss
✅ Correct Answer: (B) Overriding
📊 JAVA
Q. Which of the following statement is correct?
  • (A) For positive numbers, result of operators >> and >>> are same
  • (B) Java provides two operators to do left shift <<< and <<
  • (C) >> is the zero fill right shift operator
  • (D) >>> is the signed right shift operator
💬 Discuss
✅ Correct Answer: (A) For positive numbers, result of operators >> and >>> are same

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