Java Programming Flashcard - unit 1a

Front

Which of the following correctly declares an integer variable in Java? Options: int num = 3;, int num <- 3;, integer num = 3;, int num == 3;

Back

int num = 3;

Front

Which statement will correctly print "Hello, World!" to the console in Java? Options: print("Hello, World!");, println("Hello, World!");, System.out.println("Hello, World!");, System.print.out("Hello, World!");

Back

System.out.println("Hello, World!");

Front

What is the correct statement to import the Scanner class in Java?

Back

import java.util.Scanner;

Front

What is the correct way to create a Scanner object to read user input?

Back

Scanner sc = new Scanner(System.in);

Front

Which method is used to read an integer input from a Scanner object? Options: nextLine(), nextInt(), getInt(), readInt()

Back

nextInt()

Front

Which of the following correctly assigns the value 10 to the variable x, in Java? Options: x == 10;, x = 10;, int x <- 10;

Back

x = 10;

Front

Which of the following correctly concatenates two strings str1 and str2? Options: str3 = str1.concat(str2);, str3 = str1 + str2;, Both a and b, None of the above

Back

str3 = str1 + str2;

Front

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

Back

length()

Front

Which method retrieves the character at a specific index in a string?

Back

charAt(int index)

Front

How do you check if two strings str1 and str2 are equal in Java? Options: str1 == str2, str1.equals(str2), str1.isEqualTo(str2)

Back

str1.equals(str2)