Java
Java Mastery Quiz
Test your knowledge of Java with our engaging quiz designed for programmers of all skill levels. This quiz will challenge your understanding of core Java concepts, from the JIT compiler to thread safety.
Prepare to explore:
- Java fundamentals
- Object-oriented programming
- Thread management
What is JIT compiler?
JIT improves the runtime performance of computer programs based on bytecode.
JIT is an application development framework.
JIT is an implementation of the Java Virtual Machine which executes Java programs.
None of the above.
Method Overriding is an example of?
Static Binding..
Dynamic Binding
Both of the above
None of the above.
What will happen if static modifier is removed from the signature of the main method?
Compilation Error.
RunTime Error: NoSuchMethodError.
Program will compile and run to show the required output.
Program will compile and run without any output.
What is a marker interface?
Marker interface is an interface with no method.
Marker interface is an interface with single method, mark().
Marker interface is an interface with single method, marker().
None of the above.
Which method must be implemented by all threads?
Wait().
Start().
Stop().
Run().
Which of the following is a thread safe?
StringBuilder.
StringBuffer
Both of the above.
None of the above.
Can a top level class be private or protected?
Yes
No
Which of the following is Faster, StringBuilder or StringBuffer?
StringBuilder
StringBuffer
Both of the above
None of the above
Primitive variables are stored on Stack.
Yes
No
Which of the following is a marker interface??
Serializable
Comparable
Cloneable
None of the above.
Which two statements are true? 1. Deadlock will not occur if wait()/notify() is used 2. A thread will resume execution as soon as its sleep duration expires. 3. Synchronization can prevent two objects from being accessed by the same thread. 4. The wait() method is overloaded to accept a duration. 5. The notify() method is overloaded to accept a duration. 6. Both wait() and notify() must be called from a synchronized context.
1 and 2
3 and 5
4 and 6
1 and 3
Which method must be defined by a class implementing the java.lang.Runnable interface?
Void run()
Public void run()
Public void start()
Void run(int priority)
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