C169 Introduction to Programming in Java Objective Assessment Study Guide (2026/2027) | WGU Exam Review

C169 Introduction to Programming in
Java Objective Assessment Study Guide
(2026/2027) | WGU Exam Review

Question 1: Java Primitive Arithmetic

What is the value stored in the variable result after executing the following Java code snippet?

Java
int a = 19;
int b = 4;
int result = a / b + a % b;

• A. 7.75
• B. 7
• C. 8
• D. 4

Correct Answer: B. 7

Rationale:

1. Integer division a / b () truncates the decimal portion, resulting in 4.
2. Modulus a % b (19 % 4) evaluates to the remainder, which is 3.
3. Summing the results: 4 + 3 = 7.

Question 2: Loop Control Flow

How many times will the string "WGU Java" be printed to the console when executing the
following loop?

Java
int count = 0;
do {
System.out.println("WGU Java");
count += 2;
} while (count < 5);

• A. 2 times
• B. 3 times
• C. 5 times

, • D. 0 times

Correct Answer: B. 3 times

Rationale: Tracing execution in a post-test do-while loop:

• Pass 1: Prints "WGU Java", count becomes 2. Condition 2 < 5 is True.
• Pass 2: Prints "WGU Java", count becomes 4. Condition 4 < 5 is True.
• Pass 3: Prints "WGU Java", count becomes 6. Condition 6 < 5 is False (loop
terminates).

Total printed = 3 times.

Question 3: Array Indexing & Bounds

Given the array declaration double[] values = new double[6];, which expression references
the final element in the array?

• A. values[6]
• B. values[5]
• C. values.length
• D. values[values.length]

Correct Answer: B. values[5]

Rationale: Java arrays are zero-indexed. An array allocated with size 6 has valid index positions
0, 1, 2, 3, 4, 5. Referencing values[6] causes an ArrayIndexOutOfBoundsException.

Question 4: Object-Oriented Principles

Which Java programming keyword is used inside a class constructor or instance method to
resolve ambiguity when a local parameter name is identical to an instance variable field name?

• A. super
• B. this
• C. static
• D. void

Correct Answer: B. this

Rationale: The this reference variable points directly to the current object instance, explicitly
differentiating instance variables (this.name) from shadowing parameter variables (String
name).

Question 5: Method Overloading Rules

,Which modification to a method signature establishes valid Method Overloading in a Java
class?

• A. Changing only the method return type from int to double.
• B. Changing the parameter list by altering the parameter data types or quantity.
• C. Changing only the access modifier from private to public.
• D. Changing the parameter variable names while keeping parameter types identical.

Correct Answer: B. Changing the parameter list by altering the parameter data types or
quantity.

Rationale: Method overloading requires changing the parameter signature (number, order, or
data types of parameters). Simply altering the return type or access modifier without changing
parameters causes a compilation syntax error.

Would you like to generate additional practice question sets covering specific topics like String
manipulation (StringBuilder, .equals()), inheritance/polymorphism, or basic exception
handling (try-catch) next?

Question 6

Which primitive data type in Java is specifically designed to store a 64-bit double-
precision floating-point number?

• A. float
• B. double
• C. long
• D. int

Correct Answer: B. double

Rationale: double is a 64-bit floating-point type, whereas float is 32-bit. double is the
default choice in Java for decimal numbers.

Question 7

What is the result of evaluating the integer division expression in Java?

• A. 3.75
• B. 3
• C. 4
• D. 3.0

Correct Answer: B. 3

, Rationale: When both operands are integers, Java performs integer division, truncating
the fractional remainder.

Question 8

Which operator is used to calculate the remainder of division between two integer
values?

• A. /
• B. *
• C. %
• D. ^

Correct Answer: C. %

Rationale: The modulo operator (%) returns the integer remainder of division.

Question 9

What is implicit type casting (widening conversion) in Java?

• A. Automatically converting a smaller primitive type to a larger compatible type
(e.g., int to double).
• B. Manually casting a double to an int using parentheses (int).
• C. Converting strings into booleans.
• D. Compiling code into bytecode.

Correct Answer: A. Automatically converting a smaller primitive type to a larger
compatible type (e.g., int to double).

Rationale: Widening conversions happen automatically without data loss risk, handled
seamlessly by the Java compiler.

Question 10

Which of the following is an illegal variable identifier name in Java?

• A. userScore
• B. _totalCount
• C. 2ndAttempt
• D. $taxRate

Correct Answer: C. 2ndAttempt

Rationale: Variable identifiers in Java cannot begin with a numeric digit.