C++ Foundations — Self-Check Quiz

12 questions · ~20 min · attempt all before the answer key — it’s a separate file on purpose · ← Module home

Section A — Structure (Q1–Q3)

Q1. Which list names the four structural parts of a minimal C++ program in the order the compiler encounters them?

• a) statements → main → includes → return
• b) includes → functions (main among them) → statements → return
• c) main → includes → comments → return
• d) comments → statements → main → includes

Q2. A program contains two main functions. What happens?

• a) the first one runs
• b) the second one runs
• c) compile/link error — exactly one main per program
• d) both run in order

Q3. return 0; at the end of main means:

• a) the program used zero memory
• b) success — reported to the operating system
• c) the program has zero lines left
• d) it returns to the start of main

Section B — Data (Q4–Q7)

Q4. Which identifier is illegal in C++?

• a) totalMarks2
• b) _hidden
• c) 2ndTotal
• d) MAX_MARKS

Q5. The value 3.14 written in code is:

• a) a char literal
• b) a string literal
• c) a double literal
• d) invalid without a cast

Q6. After these two lines, what does y hold?

int x = 5;
int y = x;
x = 99;

• a) 99 — y follows x
• b) 5 — assignment copies the value at that moment
• c) undefined — y is a reference
• d) 0

Q7. Why does the course write const int PASS_MARK = 50; rather than using 50 in conditions?

• a) constants run faster in all cases
• b) the name carries meaning, one place to update, and accidental change becomes a compile error
• c) const values can be changed by the user
• d) it makes the program shorter

Section C — Operators (Q8–Q10)

Q8. What does std::cout << 7 / 2 << "\n"; print?

• a) 3.5
• b) 3
• c) 4
• d) won’t compile

Q9. What does std::cout << (2 + 3 < 5) + 1 << "\n"; print?

• a) 6
• b) 1
• c) 0
• d) 5

Q10. After int a = 5; int b = a++; — what are a and b?

• a) a=5, b=5
• b) a=6, b=6
• c) a=6, b=5
• d) a=5, b=6

Section D — Conversion & mistakes (Q11–Q12)

Q11. double avg = static_cast<double>(total) / count; with total = 17, count = 2 prints:

• a) 8
• b) 8.0
• c) 8.5
• d) 9

Q12. Which line contains a bug of the “assignment in a condition” family?

• a) if (marks == 50) { ... }
• b) if (marks = 50) { ... }
• c) if (marks >= 50) { ... }
• d) if (marks != 50) { ... }

When all 12 are answered: open the answer key (separate file — attempt-first protocol), mark yourself, and follow the bands: ≥ 11 continue; 8–10 revisit flagged sections; ≤ 7 redo the exercises and predictions.

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