2.2 Problem solving and programming

Question 1

Recursion

Answer 1

A function that calls itself. Must have base case and recursive case.

Question 2

Recursion vs Iteration

Answer 2

Recursion: Elegant for divide/conquer; risk of stack overflow; more overhead. Iteration: Generally faster; uses less memory.

Question 3

Global variable

Answer 3

Declared outside functions; accessible anywhere.

Question 4

Local variable

Answer 4

Declared inside function; only accessible within that function.

Question 5

Pass by value

Answer 5

A copy of the data is passed; original unchanged.

Question 6

Pass by reference

Answer 6

A memory address is passed; original can be modified.

Question 7

What is a breakpoint?

Answer 7

Pauses program execution at a specific line for debugging.

Question 8

What is step-over?

Answer 8

Executes current line and moves to next; does not enter called functions.

Question 9

What is step-into?

Answer 9

Enters a called function and debugs line-by-line inside it.

Question 10

What is a watch variable?

Answer 10

Monitors the value of a variable during debugging.