0 — Test 583

Correct Answer: B. BC
Explanation: Without break, execution falls through from case 2 into case 3 and stops at the break. ALSO KNOW (related points): • What does this Python code print?: for i in range(3):; if i == 5:; break; else:; print("done") → done • In C++ nested loops, what does break do? → It exits only the innermost enclosing loop or switch

Correct Answer: D. done
Explanation: A for loop's else block runs when the loop finishes without hitting break.

Correct Answer: C. 10
Explanation: A do-while loop runs its body at least once before testing the condition.

Correct Answer: C. x (once)
Explanation: The semicolon after for(...) is an empty loop body. The braces that follow form an ordinary block that runs once. ALSO KNOW (related points): • What does this C++ code print?: int i = 10;; do { cout << i; i++; } while (i < 5); → 10 • How many times is the inner statement executed?: for (i = 0; i < 4; i++); for (j = i; j < 4; j++); count++; → 10 • In C++, what does this print?: int x = 5;; if (x > 2); cout << "A";; cout << "B"; → AB

Correct Answer: A. The inner if (b)
Explanation: This is the 'dangling else' problem. An else binds to the nearest unmatched if, whatever the indentation suggests.

Correct Answer: D. Infinite loop
Explanation: When i == 2, continue skips i++, so i stays 2 forever. In a for loop, continue would still run the increment expression. ALSO KNOW (related points): • In the C code if (a) if (b) s1; else s2;, which if does the else belong to? → The inner if (b) • Which loop is described as 'entry-controlled'? → while loop

Correct Answer: A. 4
Explanation: It produces 10, 7, 4, 1. The stop value 0 is excluded.

Correct Answer: C. [2, 4]
Explanation: Removing items during iteration shifts later elements left, so every second element is skipped. Iterate over a copy (L[:]) instead. ALSO KNOW (related points): • How many values does Python's range(10, 0, -3) produce? → 4 • What does this Python code print?: for i in range(3):; pass; print(i) → 2

Correct Answer: D. It exits only the innermost enclosing loop or switch
Explanation: To leave several loops at once, use a flag, a return statement, or goto.

Correct Answer: D. 2
Explanation: A Python for loop does not create a new scope. The loop variable keeps its last assigned value.