Quiz | Croma Campus

Which of the following is not a type of constructor?

Default constructor
No-argument constructor
Parameterized constructor
Copy constructor

Mark for review

Which of the following is used to declare a constant in Java?

const
final
static
constant

Mark for review

Which of these is not a valid component of the Android architecture?

Intent
Activity
Services
Action

Mark for review

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

int
float
boolean
String

Mark for review

What is the superclass of all classes in Java?

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

Mark for review

Which of these methods is a part of the Object class in Java?

toString()
equals()
hashCode()
All of the above

Mark for review

Which is a valid declaration of a char?

char ch = '\utea';
char ch = '\uface';
char ch = 'face';
char ch = 'afe';

Mark for review

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

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

Mark for review

What is the default encoding for an InputStreamReader?

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

Mark for review

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

Default constructor
No-arg constructor
Parameterized constructor
Copy constructor

Mark for review

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

put()
get()
size()
length()

Mark for review

Which of these operators is used to allocate memory to array variables in Java?

malloc
alloc
new
calloc

Mark for review

Which of the following is true about Java?

Java is platform-independent
Java is a procedural language
Java does not support multithreading
Java is not object-oriented

Mark for review

Which method is used to compare two strings in Java?

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

Mark for review

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

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

Mark for review

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

int
float
double
real

Mark for review

Which method must be implemented by all threads?

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

Mark for review

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

static
method
function
procedure

Mark for review

Which is the valid declaration within an interface definition?

public double methoda();
public final double methoda();
static void methoda(double d1);
protected void methoda(double d1);

Mark for review

What is the return type of the hashCode() method in the Object class?

Object
int
long
void

Mark for review

Which of the following is not a state of a thread?

New
Runnable
Blocked
Running

Mark for review

Which is not a valid way to declare an array in Java?

int arr[] = new int[5];
int arr[] = {1, 2, 3, 4, 5};
int arr[];
int arr[5] = new int[];

Mark for review

Which of the following is a valid declaration of a byte?

byte b = 128;
byte b = 0;
byte b = -129;
byte b = 256;

Mark for review

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

package
import
include
namespace

Mark for review

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

put()
get()
size()
length()

Mark for review

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

length()
charAt()
append()
substring()

Mark for review

What is the return type of the hashCode() method in Java?

int
long
float
double

Mark for review

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

Mark for review

Which of these is a mechanism for cleaning the internal state of an object before it is removed from memory?

finalize()
delete()
destructor()
remove()

Mark for review

What is the size of int in Java?

4 bytes
2 bytes
8 bytes
1 byte

Mark for review

Online Exam Quiz

Online

Did you like this Question

Get a 1:1 Mentorship call with our Career Advisor