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BCA Cyber Security — free MCQ practice

Choose from 199 questions across 2 subjects and 8 topics. Open any question for its answer and worked solution, or keep learning through bite-sized lessons and reviews with Quill.

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BCA Cyber Security subjects

Computer Science (111)Cybersecurity (88)

Explore popular topics

Database Management SystemsAlgorithmsCryptographyNetwork SecurityCybersecurity FundamentalsWeb Security — OWASPCybersecurity Framework CoreIncident Response Life Cycle

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Using the library analogy, what does the DBMS correspond to?Read the answer and worked solution →A schema is best described, in the menu analogy, asRead the answer and worked solution →Per the kitchen-brigade analogy, the relational model's three pillars areRead the answer and worked solution →A relation is, in formal terms,Read the answer and worked solution →

Worked practice questions

Using the library analogy, what does the DBMS correspond to?

  1. the bookshelf where books physically sit
  2. the librarian who fetches and re-shelves books
  3. the actual library building structure
  4. the catalogue card index system
Show answer and solution

Correct answer: B. the librarian who fetches and re-shelves books

The DBMS is the software that *manages* the data, the way a librarian manages the books on the shelves. The shelves, the building and the catalogue are all pieces of the library the librarian is the one actively running it. CMU's Lecture 01 makes the same point in plain English: the database is the data, the DBMS is the software.

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A schema is best described, in the menu analogy, as

  1. tonight's special dish on the chalkboard
  2. the price the customer paid at the counter
  3. the shape every dish must fit (main course = name + price)
  4. the eviction policy the kitchen uses for stale dishes
Show answer and solution

Correct answer: C. the shape every dish must fit (main course = name + price)

The menu lists what is allowed, not what is being served right now. A schema is an agreement on shape (what columns exist and of what type), not the actual rows. Tonight's special is data, not schema the price paid is a row value eviction policy belongs to the buffer pool, not the schema.

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Per the kitchen-brigade analogy, the relational model's three pillars are

  1. select, project, join
  2. schemas, tables, indexes
  3. buffer pool, log, lock manager
  4. structure, integrity, manipulation
Show answer and solution

Correct answer: D. structure, integrity, manipulation

CMU's Lecture 01 names exactly these three: structure (what relations exist and their attributes), integrity (rules the data must satisfy), manipulation (how to read and modify). The other options are real DBMS concepts but not the model's defining pillars.

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