Question 1

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

Accepted Answer

string

Answer

boolean

Answer

int

Question 2

What is GraalVM?

Accepted Answer

a high-performance distribution of Java Development Kit

Answer

a web browser developed by Oracle

Answer

a virtual machine used for running Python scripts

Question 3

Which tool is commonly used for debugging web applications and can help identify issues with HTML, CSS, and JavaScript?

Accepted Answer

Chrome DevTools

Answer

Eclipse

Answer

Visual Studio

Question 4

What is the purpose of the <script> tag in HTML?

Accepted Answer

To include JavaScript code in a web page

Answer

To specify the character encoding of a web page

Answer

To create a hyperlink

Question 5

Which of the following is NOT a valid modifier in Java?

Accepted Answer

virtual

Answer

private

Answer

static

Question 6

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

Accepted Answer

MyClass obj = MyClass();

Answer

MyClass obj = new MyClass();

Answer

MyClass obj = null;

Question 7

What is a primary key in a database?

Accepted Answer

A column that uniquely identifies each row in a table

Answer

A column that is used to group data in a table

Answer

A column that is used to sort the data in a table

Question 8

Which of the following is NOT a type of network topology?

Accepted Answer

Square

Answer

Ring

Answer

Bus

Question 9

What is the difference between a stack and a queue data structure?

Accepted Answer

A stack is last in, first out, while a queue is first in, first out.

Answer

A stack and a queue are the same thing.

Answer

A stack is first in, first out, while a queue is last in, first out.

Question 10

What is the purpose of a linker in the compilation process?

Accepted Answer

Links object files together to create an executable file

Answer

Optimizes the code for faster execution

Answer

Converts high-level code to machine code

Question 11

What is a foreign key in a database?

Accepted Answer

A primary key in another table that is referenced in this table

Answer

A field that stores the current time and date

Answer

A unique identifier for a row in a table

Question 12

Which HTTP status code indicates a successful response?

Accepted Answer

200

Answer

400

Answer

300

Question 13

What is the purpose of a session in web development?

Accepted Answer

To store data between different web pages.

Answer

To optimize website performance

Answer

To control user authentication and authorization

Question 14

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

Accepted Answer

enum

Answer

if

Answer

while

Question 15

What is the output of the following code?

int i = 1;
do {
System.out.println(i);
i++;
} while (i < 1);

Accepted Answer

1

Answer

an error is thrown

Answer

nothing is printed

Question 16

Which of the following is not a valid way to declare and initialize a variable in Java?

Accepted Answer

int x;
x = "hello";

Answer

int x = 5;

Answer

int x;
x = 5;

Question 17

What is the correct syntax for declaring a method in Java?

Accepted Answer

public void myMethod() {}

Answer

void myMethod() public {}

Answer

myMethod() void public {}

Question 18

Which of the following is NOT a programming paradigm?

Accepted Answer

Data Flow Programming

Answer

Object-Oriented Programming (OOP)

Answer

Structured Programming

Question 19

Which of the following is an advantage of using version control software?

Accepted Answer

Allows multiple people to work on the same codebase simultaneously

Answer

Prevents errors in code from occurring

Answer

Automatically backs up code changes

Question 20

What is the output of the following JavaScript code?

var x = 5; var y = 10; console.log(x + y);

Accepted Answer

15

Answer

10

Answer

50

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