1. Which command disassembles a class file_______________?
A. javacmd
B. javaamd
C. javap
D. java
✅ The correct answer is option C.
Java concepts and its programming MCQs
2. In which we clone the object and their constituent parts_______________?
A. Deep cloning
B. Shallow cloning
C. Both of above
D. None of above
✅ The correct answer is option A.
3. Suspend thread can be revived by using ?
A. yield() method
B. Suspend() method
C. start() method
D. resume() method
✅ The correct answer is option D.
4. Java is known as ___________ stage language?
A. 1
B. 2
C. 3
D. 4
✅ The correct answer is option B.
5. Which collection class associates values witch keys, and orders the keys according to their natural order ?
A. java.util.LinkedList
B. java.util.TreeMap
C. java.util.SortedSet
D. java.util.HashSet
✅ The correct answer is option B.
6. Which metrhods are utilized to control the access to an object in multi threaded programming ?
A. Synchronized methods
B. Asynchronized methods
C. Serialized methods
D. None of above
✅ The correct answer is option A.
7. Which of the following statements about arrays is syntactically wrong ?
A. arrayName[] p = new arrayName[5];
B. arrayName p[][] = new arrayName[2][];
C. arrayName[] p [];
D. arrayName p[5];
✅ The correct answer is option D.
8. The following program: public class Test{ static boolean is OK; public static void main(String args[]){System.out.print(is OK); } } ?
A. Prints true
B. Prints false
C. Will not compile as boolean is not initialized
D. Will not compile as boolean can never be static
✅ The correct answer is option B.
9. Which method of java is invoked by JVM to reclaim the inaccessible memory location ?
A. reclaim() method
B. finalize() method
C. final() method
D. both b and c
✅ The correct answer is option B.
10. How many primitive data types are there in Java ?
A. 5
B. 6
C. 7
D. 8
✅ The correct answer is option D.