Leetcode
Write a syntax in your chosen language
;
This number system is used by most modern computers and consists only of 0s and 1s.
What is binary?
This is the practice of tricking people into giving up sensitive information, often through emails pretending to be from a legitimate source.
What is phishing?
This data structure operates on a 'last in, first out' (LIFO) principle, where elements are added and removed from the same end.
This company, founded in 1998, revolutionized online payments and is now one of the largest digital payment platforms globally.
What is PayPal?
Code a program that prints true or false for even numbers
public class EvenCheck {
public static void main(String[] args) {
int start = 1; // Starting number
int end = 20; // Ending number
for (int i = start; i <= end; i++) {
System.out.println(i + " is even: " + (i % 2 == 0));
}
}
}
This base-16 number system is commonly used in computing and includes the digits 0-9 and letters A-F.
What is hexadecimal?
This type of software is designed to detect and remove malicious programs such as viruses.
What is antivirus software?
This data structure consists of nodes, where each node contains data and a reference to the next node in the sequence, forming a chain-like connection.
Linked List
This 2015 movies tells the story of three black female mathematicians who helped NASA launch astronauts into space
Who are Hidden Figures?
Code a program that can divide numbers
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("Enter numerator: ");
double num1 = scanner.nextDouble();
System.out.print("Enter denominator: ");
double num2 = scanner.nextDouble();
System.out.println(num2 != 0 ? "Result: " + num1 / num2 : "Error: Division by zero.");
scanner.close();
}
The decimal number 39 is represented as this in binary.
What is 100111?
A strong password should include a mix of these four types of characters.
What are uppercase letters, lowercase letters, numbers, and special characters?
In this simple sorting algorithm, adjacent elements are repeatedly swapped if they are in the wrong order, causing smaller elements to 'float' to the top of the list.
Bubble Sort
This Hollywood actress and inventor co-developed a frequency-hopping technology that became the foundation for modern Wi-Fi, Bluetooth, and GPS.
Who is Hedy Lamarr?
Create a program that compares two strings
public static void main(String[] args) {
// Define two strings
String str1 = "Hello";
String str2 = "Hello";
// Compare the strings
if (str1.equals(str2)) {
System.out.println("The strings are equal.");
} else {
System.out.println("The strings are not equal.");
}
}
The decimal number 111 is represented as this in hexadecimal.
6F
This type of authentication requires something you know (password) and something you have (a code from your phone) to log in securely.
What is two-factor authentification?
This efficient, divide-and-conquer sorting algorithm splits an array into smaller subarrays, sorts them recursively, and then combines the sorted subarrays back together
Merge Sort
This 19th-century visionary wrote detailed notes on Charles Babbage's Analytical Engine, explaining how it could be programmed to perform tasks beyond arithmetic, laying the groundwork for modern computing.
Who is Ada Lovelace?
Create a program that iterates through an integer list and adds all the numbers
public static void main(String[] args) {
// Initialize the array of integers
int[] numbers = {5, 10, 15, 20};
// Calculate the sum using a stream
int sum = Arrays.stream(numbers).sum();
// Print the result
System.out.println("The sum of the numbers is: " + sum);
}
The number 13F7B in hexadecimal is equal to this in binary.
What is 10011111101111011?
This type of cybersecurity measure scrambles data so that only authorized users can read it.
What is encryption?
A classic puzzle involving three rods and a stack of disks, where the goal is to move the entire stack to another rod, one disk at a time, without placing a larger disk on top of a smaller one
Towers of Hanoi
Known for her work on COBOL, she became a leader in the push for business computing in the 1960s.
Who is Grace Hopper?