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4260 題 중등 8/8/2026
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免費體驗 20 題Which of the following types of malware can self-replicate and spread to other computers through a network without attaching to a host program? 以下哪一種惡意軟件會自我複製，並透過網絡傳播到其他電腦，而無需依附於任何宿主程式？
An employee receives an email claiming to be from a bank, asking the employee to click a link to update account information. Which type of online threat does this represent? 某公司員工收到一封電郵，聲稱來自銀行，要求員工點擊連結更新帳戶資料。這屬於以下哪種網上威脅？
A user received an email with an attachment claiming to be an invoice. After opening it, all files on the computer were encrypted and a message demanded payment in Bitcoin to recover them. This is a ransomware attack. What is the primary attack method of ransomware? 一位用戶收到一封帶有附件的電子郵件，聲稱是發票。打開後，電腦上的所有檔案都被加密，並出現一條訊息要求以比特幣支付贖金才能恢復檔案。這是一次勒索軟件攻擊。勒索軟件的主要攻擊手段是什麼？
A company needs to encrypt a large database of customer records for storage. The IT manager suggests using symmetric key encryption. Which of the following are characteristics of symmetric key encryption? (1) The same key is used for both encryption and decryption (2) It is faster than asymmetric encryption (3) It is suitable for transmitting keys over insecure channels (4) It is commonly used to encrypt large volumes of data 一家公司需要為儲存的大量客戶資料庫進行加密。IT 經理建議使用對稱密鑰加密。以下哪項是對稱密鑰加密 (Symmetric key encryption) 的特點？ (1) 加密和解密使用相同的密鑰 (2) 運算速度比非對稱加密快 (3) 適合在不安全的渠道傳送密鑰 (4) 常用於加密大量數據
In a public key cryptography system, if Ming wants to send an encrypted message that only Hong can read, which key should he use for encryption? 在公開密鑰加密系統 (Public key cryptography) 中，若小明想傳送一封只有小紅能閱讀的加密訊息，他應使用哪把密鑰進行加密？
一間公司正在選擇加密方式保護機密檔案。以下哪一項正確描述公開密鑰加密 (public key encryption) 的特點？ A company is choosing an encryption method to protect confidential files. Which of the following correctly describes a characteristic of public key encryption?
以下是一間網上商店使用的保安措施： (I) 使用防火牆 (firewall) (II) 使用數碼證書 (digital certificate) (III) 使用防毒軟件 (anti-virus software) 以上哪些措施能直接驗證網站的真實身份？ The following are security measures used by an online store: (I) Using a firewall (II) Using a digital certificate (III) Using anti-virus software Which of the above measures can directly verify the authenticity of a website?
When you visit a secure website (https://www.example.com), your browser checks the website's digital certificate to verify its identity. Which organisation is responsible for issuing such digital certificates? 當你訪問一個安全網站（https://www.example.com）時，瀏覽器會檢查該網站的數碼證書以驗證其身份。哪個機構負責簽發這類數碼證書？
When shopping online, the browser address bar shows 'https://' and a padlock icon. Which of the following statements are correct? (1) Communication between the website and user is encrypted (2) The website has been issued a digital certificate by a CA (3) The products sold on the website are guaranteed to be genuine (4) SSL/TLS protocol is used for a secure connection 在網上購物時，瀏覽器網址列顯示「https://」及鎖頭圖標。以下哪項陳述是正確的？ (1) 網站與用戶之間的通訊已加密 (2) 該網站已獲核證機關簽發數碼證書 (3) 該網站銷售的產品一定是正貨 (4) 使用了 SSL/TLS 協定進行安全連線
一個惡意程式偽裝成免費的手機遊戲應用程式。用戶安裝後，該程式在背景開啟後門，讓攻擊者可以遠端控制手機。但該程式不會自我複製或傳播到其他裝置。以下哪一項最能描述該惡意程式的類型？ A malicious program disguises itself as a free mobile game app. After installation, it opens a backdoor in the background, allowing the attacker to remotely control the phone. However, the program does not self-replicate or spread to other devices. Which of the following best describes this type of malware?
以下程式片段使用了不同類型的運算子： ``` x = 17 y = 5 a = x / y b = x MOD y c = (x > 10) AND (y < 10) ``` 以下哪一組結果是正確的？ The following program uses different types of operators: ``` x = 17 y = 5 a = x / y b = x MOD y c = (x > 10) AND (y < 10) ``` Which of the following sets of results is correct?
A shopkeeper has 17 eggs and plans to pack them into boxes of 5 eggs each. He writes the following code to find how many eggs are left unpacked: result = 17 MOD 5 What is the value of result? 某店主有 17 隻雞蛋，準備每 5 隻裝成一盒。他寫了以下程式碼來找出餘下未能裝盒的雞蛋數目： result = 17 MOD 5 變數 result 的值是多少？
一個忠誠計劃使用以下偽代碼檢查客戶是否符合特別優惠資格。如果客戶積分 (x) 大於 8 且購買商品數量 (y) 少於 5，則輸出 "A"（符合），否則輸出 "B"。當 x = 10 且 y = 3 時，輸出是什麼？ x = 10 y = 3 IF x > 8 AND y < 5 THEN OUTPUT "A" ELSE OUTPUT "B" ENDIF
以下程式片段用於計算列表中所有正數的平均值： ``` nums = [5, -2, 8, -1, 6] sum = 0 count = 0 FOR i = 0 TO 4 IF nums[i] > 0 THEN sum = sum + nums[i] count = count + 1 END IF NEXT i average = sum / count OUTPUT average ``` 程式的輸出是甚麼？ The above program calculates the average of all positive numbers in the list. What is the output?
以下程式片段： ``` text = "HELLO WORLD" length = LEN(text) result = "" FOR i = 0 TO length - 1 ch = MID(text, i, 1) IF ch != " " THEN result = result + ch END IF NEXT i OUTPUT result ``` 程式執行後輸出甚麼？解釋 LEN() 和 MID() 函數的用途。(3 分) What is the output? Explain the functions of LEN() and MID(). (3 marks)
在程式設計中，變數 (variable) 和常數 (constant) 都用來儲存數據。以下哪一項正確描述常數和變數的分別？ In programming, both variables and constants are used to store data. Which of the following correctly describes the difference between constants and variables?
以下程式片段使用了巢狀選擇結構 (nested selection)： ``` score = 72 IF score >= 80 THEN grade = "A" ELSE IF score >= 60 THEN grade = "B" ELSE IF score >= 40 THEN grade = "C" ELSE grade = "F" END IF END IF END IF OUTPUT grade ``` 程式的輸出是甚麼？ The above program uses nested selection. What is the output?
A teacher wants to find the highest score in a list of student marks. The following code segment is used. What is its purpose? 一位老師想從學生成績列表中找出最高分。以下程式段被使用，它的用途是什麼？ A = [8, 3, 15, 6, 12] result = A[0] FOR i = 1 TO 4 IF A[i] > result THEN result = A[i] ENDIF NEXT i OUTPUT result
以下程式片段在列表中搜尋某個目標值： ``` names = ["Alice", "Bob", "Charlie", "David", "Eve"] target = "Charlie" found = FALSE FOR i = 0 TO 4 IF names[i] == target THEN found = TRUE OUTPUT "Found at position " + i END IF NEXT i IF found == FALSE THEN OUTPUT "Not found" END IF ``` 程式的輸出是甚麼？ The program searches for a target value in a list. What is the output?
以下運算式中，NOT、AND、OR 是布林運算子 (Boolean operators)： ``` result = NOT (TRUE AND FALSE) OR (TRUE AND TRUE) ``` result 的值是甚麼？ In the following expression, NOT, AND, OR are Boolean operators: ``` result = NOT (TRUE AND FALSE) OR (TRUE AND TRUE) ``` What is the value of result?
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根據本題庫其中 1265 條有足夠作答樣本嘅題目、累計 41,536 次真實作答統計，以下選項最多考生揀錯——溫習時特別留神。
1
Scenario: Amy owns the domain name "amyshop.com". Which of the following `URL`s does NOT …
最多人誤揀：http://mail.amyshop.com/login.htm
36% 作答者揀咗呢個錯誤選項 · 此題累計 42 次作答
2
Which of the following is not a good practice of programming? 以下哪項不是良好的程式編寫習慣？
最多人誤揀：Solve a problem using the 'divide and conquer' strategy. 使用「…
27% 作答者揀咗呢個錯誤選項 · 此題累計 37 次作答
3
Scenario: A company is planning to upgrade its office network. Which of the following are …
最多人誤揀：Item (1) only 只有 (1)
24% 作答者揀咗呢個錯誤選項 · 此題累計 42 次作答
4
When shopping online, the browser address bar shows 'https://' and a padlock icon. Which o…
最多人誤揀：(1) and (4) (1) 及 (4)
26% 作答者揀咗呢個錯誤選項 · 此題累計 39 次作答
5
Scenario: A school has 20,000 students, each assigned a unique student number. What is the…
最多人誤揀：13
26% 作答者揀咗呢個錯誤選項 · 此題累計 34 次作答
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