JAVA Trial Simulation

Java is a general-purpose programming language that is class-based, object-oriented. It is designed to have as few implementation dependencies as possible. It is intended to let application developers write once, run anywhere (WORA), meaning that compiled Java code can run on all platforms that support Java without the need for recompilation. Java applications are typically compiled to bytecode that can run on any Java virtual machine (JVM) regardless of the underlying computer architecture. The syntax of Java is similar to C and C++, but it has fewer low-level facilities than either of them.
These questions will give you basic idea for Examinations Preparation and/or interview on Java
● Language Fundamentals
● Operators and Assignments
● Exceptions
● Inner Classes
● Garbage Collections
● Java.lang Class
● Declarations and Access Control
● Flow Control
● Objects and Collections
● Threads
● Assertions

This digital Marketing Trial Simulation consists of 10 questions only.
Time Limit- 15 min.
The decision of the quiz-master will be final and will not be subjected to any change.
The participants shall not be allowed to use mobile or other electronic instruments.
The questions shall be in the form of multiple-choice, True / False statement, Specificanswer question, etc

1 / 10

The following block of code creates a Thread using a Runnable target:

Runnable target = new MyRunnable();

Thread myThread = new Thread(target);

Which of the following classes can be used to create the target, so that the preceding code compiles correctly?

public class MyRunnable extends Runnable{public void run(){}}

public class MyRunnable implements Runnable{void run(){}}

public class MyRunnable extends Object{public void run(){}}

public class MyRunnable implements Runnable{public void run(){}}

2 / 10

Assume the following method is properly synchronized and called from a thread A on an object B:

wait(2000);

After calling this method, when will the thread A become a candidate to get another turn at the CPU?

After thread A is notified, or after two seconds.

Two seconds after lock B is released.

After the lock on B is released, or after two seconds.

Two seconds after thread A is notified.

3 / 10

Suppose that you would like to create an instance of a new Map that has an iteration order that is the same as the iteration order of an existing instance of a Map. Which concrete implementation of the Map interface should be used for the new instance?

TreeMap

HashMap

The answer depends on the implementation of the existing instance

LinkedHashMap

4 / 10

Where will be the most chance of the garbage collector being invoked?

After line 10

Garbage collector never invoked in methodA()

After line 11

After line 9

5 / 10

What will be the output of the program?

ABBCAD

CDDACB

Indeterminate output

ACCBAD

6 / 10

What will be the output of the program?

It prints "foobarhi"

It prints "barhi"

An error occurs at runtime.

Compilation fails.

7 / 10

What will be the output of the program?

0..1..2..

Compilation fails

1..2..3..

0..1..2..3..

8 / 10

What will be the output of the program?

String s = "ABC";

s.toLowerCase();

s += "def";

System.out.println(s);

ABCdef

Compile Error

ABC

abc

9 / 10

What is the numerical range of char?

-256 to 255

0 to 65535

-32768 to 32767

0 to 32767

10 / 10

Which statement is true?

There are syntax errors on lines 1 and 6

There are syntax errors on lines 1, 6, and 8

There is a syntax error on line 6

There is a syntax error on line 1

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JAVA Trial Simulation

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