Quiz | Croma Campus

Which method is used to find the length of a string in Java?

length()
size()
getSize()
getLength()

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Which of the following is not a control statement in Java?

break
continue
exit
return

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What is the output of System.out.println("Hello World".substring(6));?

Hello
World
Hello World
World Hello

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Which method is used to get the current date and time in Java?

currentTime()
getTime()
now()
LocalDateTime.now()

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Which operator is used for comparing two values?

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Which access modifier makes a member accessible only within its own class?

public
protected
default
private

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Which of the following is not an access modifier in Java?

public
private
protected
internal

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Which of the following is not a valid Java identifier?

_myVariable
$myVariable
123myVariable
myVariable123

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What is the size of an int data type in Java?

4 bytes
2 bytes
8 bytes
1 byte

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What is the use of the 'this' keyword in Java?

To refer to the current object
To refer to a superclass object
To refer to a static object
To refer to a local variable

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Which package contains the Random class?

java.util
java.lang
java.io
java.awt

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Which of the following is true about Java's garbage collection?

It is manual
It is automatic
It is optional
None of the above

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Which of the following is not a valid way to create an object in Java?

new ClassName()
Class.forName("ClassName").newInstance()
ClassName.clone()
ClassName.new()

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Which keyword is used to prevent inheritance in Java?

stop
end
final
static

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What is the default value of a boolean variable in Java?

TRUE
FALSE
0
null

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Which of the following is used to handle exceptions in Java?

try-catch
if-else
switch-case
for-loop

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What does the acronym JVM stand for?

Java Virtual Machine
Java Variable Machine
Java Virtual Method
Java Visual Machine

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Which of the following is not a primitive data type in Java?

int
float
boolean
String

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What is the result of 10 % 3?

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Which of the following is the correct way to handle multiple exceptions in Java 7 and later?

Multiple catch blocks
A single catch block
A single catch block with multiple exceptions separated by a comma (,)
)

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Which method is used to stop a thread in Java?

stop()
end()
terminate()
kill()

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Which of the following is a reserved word in Java?

main
System
new
print

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Which method is called when an object is created in Java?

create()
init()
constructor
new()

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What does the static keyword mean in Java?

The variable or method belongs to the instance
The variable or method belongs to the class
The variable or method is private
The variable or method is final

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Which keyword is used to define an interface in Java?

class
interface
implements
extends

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What is the default value of a local variable in Java?

0
null
undefined
No default value

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Which keyword is used to define a subclass in Java?

subclass
inherits
extends
implements

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Which of the following is a marker interface?

Serializable
Cloneable
Remote
All of the above

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Which of the following is used to find the absolute value of a number in Java?

Math.abs()
Math.absolute()
Math.absValue()
Math.absoluteValue()

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Which of the following is not a keyword in Java?

strictfp
null
instanceof
native

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