Quiz | Croma Campus

Which of the following is not a valid access modifier in Java?

public
private
protected
package

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Which of the following is not a valid method of the Math class in Java?

abs()
ceil()
floor()
round()

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Which of these methods is a part of the Collection interface?

add()
size()
get()
isEmpty()

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Which method is used to compare two strings in Java?

equals()
compare()
compareTo()
equalsIgnoreCase()

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Which of the following is not a valid operator in Java?

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Which of the following is used to create an object in Java?

new
create
object
instance

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What is the extension of compiled Java classes?

.js
.txt
.class
.java

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Which of the following is not a type of constructor in Java?

Default constructor
No-arg constructor
Parameterized constructor
Copy constructor

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What is the size of an int variable in Java?

4 bytes
8 bytes
2 bytes
1 byte

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Which of the following is used to create a strictfp method in Java?

strictfp
method
function
procedure

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Which of the following is a reserved keyword in Java?

array
goto
null
constant

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Which of the following is used to create a thread in Java?

Runnable interface
Thread class
Both A and B
None of the above

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Which of these keywords is used to define interfaces in Java?

class
package
interface
implements

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Which method is used to convert a string into a double in Java?

parseDouble()
valueOf()
convert()
toDouble()

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Which of these data types is used to store text in Java?

int
float
char
String

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

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

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

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

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Which of the following is used to create a final class in Java?

final
class
interface
extends

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Which keyword is used to declare a constant in Java?

const
static
final
abstract

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Which of the following statements is true about Java?

Java is a platform-independent language
Java is a procedural language
Java is a pure object-oriented language
Java supports both procedural and object-oriented programming

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Which method must be implemented by all threads?

run()
start()
stop()
wait()

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Which of the following is not a valid keyword in Java?

static
void
private
constant

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Which of these is used to explain the type of exception that is thrown by a method?

throw
throws
thrown
exception

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Which method is used to write bytes to an output stream?

read()
write()
print()
display()

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Which of the following is not a valid method of the PriorityQueue class in Java?

add()
remove()
size()
length()

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What is the superclass of all classes in Java?

java.lang.String
java.lang.Object
java.lang.System
java.lang.Class

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What is the default encoding for an InputStreamReader?

UTF-8
ASCII
ISO-8859-1
UTF-16

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What is the default value of the boolean data type in Java?

TRUE
FALSE
0
null

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In Java, what is the correct syntax to output "Hello World"?

System.out.println("Hello World");
print("Hello World");
echo("Hello World");
Console.WriteLine("Hello World");

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Which method can be defined only once in a program?

main method
finalize method
static method
private method

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