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Grade 12 Computer Science - Practice Quiz

A quick 10-question quiz to check your understanding.

10 questions

Answer the questions below 0 of 10 answered

1Which of the following is a correct syntax for a while loop in Python?

A while (i < 10) { i += 1 } B while i < 10: i += 1 C while i < 10 do i = i + 1 D while i < 10 then i = i + 1

2What is the time complexity of searching for an element in a balanced binary search tree?

A O(1) B O(log n) C O(n) D O(n log n)

3In relational databases, which SQL command is used to remove duplicate rows from the result set?

A DELETE B DISTINCT C UNIQUE D TRUNCATE

4Which HTML tag is used to embed a JavaScript file in a web page?

A <script src="app.js"></script> B <link href="app.js" rel="script"> C <js src="app.js"></js> D <embed src="app.js" type="text/javascript">

5What does the principle of 'least privilege' mean in cyber security?

A Give every user admin rights B Allow users only the access necessary for their tasks C Share passwords among team members D Disable all firewalls

6Which layer of the OSI model is responsible for routing packets between different networks?

A Physical B Data Link C Network D Transport

7In machine learning, what is the term for a model's ability to generalize well to unseen data?

A Overfitting B Underfitting C Bias D Generalization

8Which of the following is a common file format for Android mobile applications?

A .ipa B .apk C .exe D .appx

9In the software development life cycle (SDLC), which phase comes immediately after requirements gathering?

A Testing B Design C Implementation D Maintenance

10Which tool is commonly used for network packet capture and analysis in ethical hacking?

A Wireshark B Photoshop C MATLAB D LibreOffice

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