Sia
Question
Computer Science
Posted 3 months ago
Neriah is writing code for a website that publishes attention-grabbing news
articles.
The code relies on multiple string operations:
Pseudocode
Description
Concatenates (joins) two strings to each other,
CONCATENATE (string1,
returning the combined string.
string2)
Returns the string in uppercase.
UPPER (string)
Her code uses these variables:
titlel
+ "Cat rips Xmas tree to shreds"
+ "Cat stuck in tree for weeks"
title2
title3 "New world record: fluffiest cat ever"
Which of the following expressions results in the string "CAT STUCK IN
TREE FOR WEEKS!!!"?
Note that there are 2 answers to this question.
Choose 2 answers:
CONCATENATE ( UPPER (title2) + "!!!")
A
UPPER ( CONCATENATE (title2) + "!!!")
B
CONCATENATE ( UPPER (title2),
C
"!!!")
D
UPPER ( CONCATENATE (title2, "!!!")
)
E
CONCATENATE ( title2, UPPER("!!!")
)
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Answer from Sia
Posted 3 months ago
For the given question, let's analyze the pseudocode and the provided options to determine which expressions result in the string "CAT STUCK IN TREE FOR WEEKS!!!".
Given:
- "title2 = "Cat stuck in tree for weeks""
We need to transform "title2" to uppercase and concatenate it with "!!!".
Let's evaluate each option:
1. "CONCATENATE ( UPPER (title2) + "!!!")"
2. "UPPER ( CONCATENATE (title2) + "!!!")"
3. "CONCATENATE ( UPPER (title2), "!!!")"
4. "UPPER ( CONCATENATE (title2, "!!!") )"
5. "CONCATENATE ( title2, UPPER("!!!") )"
Option Analysis:
1. "CONCATENATE ( UPPER (title2) + "!!!")"
- This option is incorrect because the "+" operator is not used for concatenation in the given pseudocode.
2. "UPPER ( CONCATENATE (title2) + "!!!")"
- This option is incorrect because the "+" operator is not used for concatenation in the given pseudocode.
3. "CONCATENATE ( UPPER (title2), "!!!")"
- This option is correct. It first converts "title2" to uppercase and then concatenates it with "!!!".
4. "UPPER ( CONCATENATE (title2, "!!!") )"
- This option is incorrect because it concatenates "title2" with "!!!" first and then converts the entire result to uppercase, which would result in "CAT STUCK IN TREE FOR WEEKS!!!".
5. "CONCATENATE ( title2, UPPER("!!!") )"
- This option is incorrect because it converts "!!!" to uppercase, which is redundant, and concatenates it with "title2".
Correct Answers:
C
D
Key Concept:
String Operations and Order of Execution
Explanation:
The correct expressions first convert "title2" to uppercase and then concatenate it with "!!!". The order of operations and the correct use of functions are crucial in achieving the desired result.
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