Trace the Code
What will be the final output of this program when it is run?x = 10
y = 5
z = x + y
x = z - y
y = x * 2
z = y // 3
print(f"X: {x}, Y: {y}, Z: {z}")
Code will print X: 15, Y: 30, Z: 10
You will trace the code by tracking the value of the code and the variable, and then the program will find each line sequentially.
Write a program that uses the loop to find the sum of all whole numbers from 1 to 10
total = 0
for i in range(1, 11): # Loop from 1 to 10
total = total + i
print(total) # Output: 55
To solve this question, you have to keep track of the running total number so that you can move through each number.
If it is raining, you bring an umbrella. Otherwise, you wear sunglasses.
It is raining. What should you do?
Bring an umbrella
Since it is raining, the if condition is true, so you should bring an umbrella.
If it is raining
print("Bring an umbrella")
The if statement is missing a condition ending or structure.
An if statement needs a complete condition to check. As written, it does not clearly say how the computer knows when it is raining.
What is an algorithm?
An algorithm is a set of steps to solve a problem.
An algorithm gives clear instructions in a certain order so a computer (or person) knows what to do.
Trace the execution of the following Python code and determine the final value printed by the print() statement.
def process_data(data_list, factor):
def multiply(value):
return value * factor
processed = []
for item in data_list:
if item['value'] > 50:
processed.append(multiply(item['value']))
else:
processed.append(item['value'] * 2)
return processed
data = [
{'name': 'A', 'value': 40},
{'name': 'B', 'value': 60},
{'name': 'C', 'value': 30},
{'name': 'D', 'value': 80}
]
result = process_data(data, 3)
print(result)
The code will print 80,180,60,240
You have to keep track of each line and note the variable and its values in the code.
What is the final value of x after the following loop finishes
x = 0;
for (let i = 1; i <= 5; i++) {
if (i % 2 === 0) {
x = x + i;
} else {
x = x - 1;
The value of x is 3
If you want to find the x value, you must trace the loop logic and then step by step for each five iterations
If your homework is finished, you can play video games. Otherwise, you must keep working.
Your homework is not finished. What should you do?
Keep working.
The if condition is false, so the else action happens
if score > 90
print("A")
else if score > 80
print("B")
The structure of the conditional statements is incorrect.
The code does not properly connect the if and else-if statements, so the computer may not know which condition to check next.
What does a conditional statement do?
A conditional statement makes decisions based on a condition.
It checks if something is true or false and then decides what action to take, like using if and else.
What is the output of this code
def make_multipliers():
return [lambda x: x * i for i in range(4)]
multipliers = make_multipliers()
print([m(2) for m in multipliers])
The output of this code would be 6,6,6,6
This is the answer because the final line of code iterates through the multipliers list and calls each function m with an argument of 2.
You are given the head of a linked list. Determine if the linked list contains a cycle (a "loop" where a node's next pointer points back to a previous node in the list)
.public boolean hasCycle(ListNode head) {
if (head == null) return false;
ListNode slow = head;
ListNode fast = head;
while (fast != null && fast.next != null) {
slow = slow.next; // Move 1 step
fast = fast.next.next; // Move 2 steps
if (slow == fast) { // Logic Loop: They met!
return true;
}
}
return false; // Fast reached the end
Yes, it does contain a loop
The answer is true because the faster pointer reaches the end of the list, and then the smaller pointer takes the gap between.
If a number is greater than 10, print “Big number.” Else if the number is equal to 10, print “Exactly ten.” Else, print “Small number.”
The number is 8. What is printed?
“Small number.”
8 is not greater than 10 and not equal to 10, so the else condition runs
if number = 5
print("Five")
The code is using the wrong symbol to compare values.
Explanation:
The single equals sign is used to assign a value, not compare values. This confuses whether the code is checking or changing the number.
What is the difference between a loop and a conditional?
A loop repeats actions, while a conditional makes decisions.
A loop runs the same code multiple times, but a conditional chooses which code to run based on a condition.