Sia
Question
Computer Science
Posted 8 months ago
The following numbers are displayed by a program:
2468
The program code is shown below, but it is missing three values:
, , and .
i -
REPEAT TIMES
{
DISPLAY (i * 2)
i
-it
}
Given the displayed output, what must the missing values be?
Choose 1 answer:
= 2, = 2, = 1
A
B
= 2, = 4,
= 1, = 4, = 1
C
= 2, = 4, = 2
D
E
= 1, = 2, = 2 
Sign in to unlock the answer
Answer from Sia
Posted 8 months ago
Explanation
The problem involves determining the correct values for the placeholders , , and in a code snippet to produce the given output sequence "2 4 6 8".
Step-by-step Instruction
▪
Understand the code snippet and how the placeholders affect the output
▪
Test each provided answer choice to see which one produces the correct output
Given the code snippet:
python
Let's analyze each answer choice:
1. Choice A: <COUNTER> = 2, <AMOUNT> = 2, <STEP> = 1
- Initial value of "i" is 2.
- Repeat 2 times:
- DISPLAY (2 * 2) -> 4
- i <- 2 + 1 -> 3
- DISPLAY (3 * 2) -> 6
- Output: 4 6 (Incorrect)
2. Choice B: <COUNTER> = 2, <AMOUNT> = 4, <STEP> = 1
- Initial value of "i" is 2.
- Repeat 4 times:
- DISPLAY (2 * 2) -> 4
- i <- 2 + 1 -> 3
- DISPLAY (3 * 2) -> 6
- i <- 3 + 1 -> 4
- DISPLAY (4 * 2) -> 8
- i <- 4 + 1 -> 5
- DISPLAY (5 * 2) -> 10
- Output: 4 6 8 10 (Incorrect)
3. Choice C: <COUNTER> = 1, <AMOUNT> = 4, <STEP> = 1
- Initial value of "i" is 1.
- Repeat 4 times:
- DISPLAY (1 * 2) -> 2
- i <- 1 + 1 -> 2
- DISPLAY (2 * 2) -> 4
- i <- 2 + 1 -> 3
- DISPLAY (3 * 2) -> 6
- i <- 3 + 1 -> 4
- DISPLAY (4 * 2) -> 8
- Output: 2 4 6 8 (Correct)
4. Choice D: <COUNTER> = 2, <AMOUNT> = 4, <STEP> = 2
- Initial value of "i" is 2.
- Repeat 4 times:
- DISPLAY (2 * 2) -> 4
- i <- 2 + 2 -> 4
- DISPLAY (4 * 2) -> 8
- i <- 4 + 2 -> 6
- DISPLAY (6 * 2) -> 12
- i <- 6 + 2 -> 8
- DISPLAY (8 * 2) -> 16
- Output: 4 8 12 16 (Incorrect)
5. Choice E: <COUNTER> = 1, <AMOUNT> = 2, <STEP> = 2
- Initial value of "i" is 1.
- Repeat 2 times:
- DISPLAY (1 * 2) -> 2
- i <- 1 + 2 -> 3
- DISPLAY (3 * 2) -> 6
- Output: 2 6 (Incorrect)
Time Complexity
The time complexity is O(n) where n is the value of because the loop runs times.
Space Complexity
The space complexity is O(1) as we are only using a constant amount of extra space for the variables.
Not the question you are looking for? Ask here!
Enter question by text
Enter question by image
Unlock Smarter Learning with AskSia Super!
Join Super, our all-in-one AI solution that can greatly improve your learning efficiency.
30% higher accuracy than GPT-4o
Entire learning journey support
The most student-friendly features
Study Other Question