Free CHS-J1 Practice Questions

Question 1

A Java program uses Scanner to read a user's age. Which statement correctly creates a Scanner object that reads from standard input?

Accepted Answer

Scanner input = new Scanner(System.in);

Answer

Scanner input = new Scanner(Console.in);

Answer

Scanner input = new Scanner(System.console());

Answer

Scanner input = new Scanner(InputStream.keyboard());

Question 2

A method declares an int variable named total inside its body. Another method in the same class attempts to use total directly. What is the most accurate explanation?

Accepted Answer

The variable is only accessible within the method where it is declared

Answer

The variable is accessible because all methods share local variables

Answer

The variable is automatically converted into a class variable

Answer

The variable can be accessed only because it stores a primitive value

Question 3

What value is stored in result after this code executes?
int a = 7;
double result = a / 2;

Accepted Answer

3.0

Answer

2.5

Answer

3.5

Answer

4.0

Question 4

A programmer wants to convert the String value "42" into an integer before performing arithmetic. Which approach is appropriate?

Accepted Answer

Integer.parseInt("42")

Answer

String.toInteger("42")

Answer

int.convert("42")

Answer

Integer.cast("42")

Question 5

A program contains an ArrayList of student names. The programmer needs to examine every name without changing the list. Which approach best matches this task?

Accepted Answer

Use traversal that visits each element in sequence

Answer

Use an index-based loop that removes each element after reading it

Answer

Create a second ArrayList and discard the original list

Answer

Convert the ArrayList into a single String before reading values

Question 6

A two-dimensional int array is declared as int[][] scores = new int[3][4]; What does this declaration create?

Accepted Answer

Three rows and four columns of integer storage

Answer

Four rows and three columns of integer storage

Answer

A single integer containing 12 values

Answer

Three separate arrays that cannot be accessed together

Question 7

A programmer writes if (x > 5 && x < 10). For which value of x will the condition evaluate to true?

Accepted Answer

7

Answer

5

Answer

10

Answer

12

Question 8

What is printed by this loop? for (int i = 1; i <= 3; i++) { System.out.print(i); }

Accepted Answer

123

Answer

0123

Answer

321

Answer

124

Question 9

A developer needs a loop that continues running as long as a user's input remains valid, but the number of repetitions is unknown before execution. Which loop is most appropriate?

Accepted Answer

A while loop controlled by the validity condition

Answer

A for loop with a fixed number of iterations

Answer

A nested if statement without repetition

Answer

A class constructor that repeats automatically

Question 10

A class named Book has an instance variable title and a static variable totalBooks. Which statement is correct?

Accepted Answer

title can differ between objects while totalBooks is shared by the class

Answer

Each object has its own copy of both variables

Answer

title belongs to the class while totalBooks belongs to each object

Answer

Neither variable can be accessed after an object is created

Free CHS-J1 Practice Questions

Domain 1: Java Fundamentals: Perform basic input and output using standard packages (including scanner); Evaluate the scope of a variable

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Domain 3: Implement Flow Control: Boolean Expressions including understanding and evaluating logic expressions; Iterations and Loops including for loops, for-each loops, and while loops

Question 7

Question 8

Question 9

Domain 4: Perform Object-Oriented Programming: Creating and using objects; Writing classes, including methods, instance variables, and static methods; Recognizing class hierarchies and inheritance; excludes implementing inheritance, polymorphism, abstract classes, and interfaces

Question 10

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