Trace the Code
x = 5
x = x + 3
print(x)
What will be printed?
what is 8
Explanation:
The variable x starts at 5, then 3 is added, making the final value 8.
for (int i = 0; i < 5; i++) {
System.out.print(i + " ");
}
How many numbers are printed?
What is 5
Explanation:
The loop runs while i is 0 through 4, which is five iterations.
int num = 7;
if (num > 5) {
System.out.println("High");
} else {
System.out.println("Low");
}
What is printed?
What is High
Explanation:
Since 7 is greater than 5, the if condition is true.
int x;
System.out.println(x);
What is wrong?
What is x is not initialized.
Explanation:
Java requires local variables to be given a value before they are used.
What is a variable in Java?
What is A named storage location for data.
Explanation:
Variables store values that can change while a program runs.
int a = 2;
int b = 4;
a = b - a;
b = a + b;
System.out.println(a + " " + b);
What is printed?
what is 2,6
Explanation: First a becomes 2 (4 − 2), then b becomes 6 (2 + 4).
int count = 0;
for (int i = 1; i <= 10; i++) {
if (i % 2 == 0) {
count++;
}
}
System.out.println(count);
What is printed?
What is 5
Explanation:
There are five even numbers between 1 and 10, so count increases five times.
int score = 85;
if (score >= 90) {
System.out.println("A");
} else if (score >= 80) {
System.out.println("B");
} else {
System.out.println("C");
}
What letter grade is printed?
What is B
Explanation:
The score is not high enough for an A but meets the condition for a B.
for (int i = 0; i <= 5; i--) {
System.out.println(i);
}
What is wrong?
What is The loop will never stop.
Explanation:
i is decreasing while the condition checks if it is less than or equal to 5, causing an infinite loop.
What does a for loop do?
What Is Repeats a block of code a specific number of times.
Explanation:
A for loop uses initialization, condition, and update steps to control repetition.
int total = 0;
for (int i = 1; i <= 4; i++) {
total += i * 2;
}
System.out.println(total);
What is printed?
What Is 20
Explanation:
The loop runs 4 times and adds 2, 4, 6, 8 to total, which sums to 20.
int sum = 0;
int i = 5;
while (i > 0) {
sum += i;
i -= 2;
}
System.out.println(sum);
What is printed?
What is 9
Explanation:
The loop adds 5 + 3 + 1 before stopping, resulting in a total of 9.
int x = 10;
int y = 20;
if (x > 5 && y < 15) {
System.out.println("A");
} else if (x <= 10 || y >= 20) {
System.out.println("B");
} else {
System.out.println("C");
}
What is printed?
What is B
Explanation:
The first condition fails, but the else if is true because x <= 10 and y >= 20.
int[] nums = {1, 2, 3};
System.out.println(nums[3]);
What is wrong?
What is The index is out of bounds.
Explanation:
Arrays start at index 0, so the last valid index is 2, not 3.
What is the difference between == and .equals() in Java?
What is == compares memory references, while .equals() compares values.
Explanation:
For objects like strings, .equals() checks the actual content, not the location in memory.