Lectures 7 - 10

Question 1

Variables are placed on . . .

Answer 1

The stack

Question 2

Memory management happens . . .

Answer 2

Automatically, at compile time, and when there is little to do.

Question 3

The stack is

Answer 3

A small amount of memory managing function calls and automatic variables

Question 4

Heap

Answer 4

The rest of the addressable memory

Deal with memory allocation and de-allocation

Question 5

Why should you keep a pointer to the data alive?

Answer 5

You won’t be able to free it.

Question 6

The development of programming languages has diverged.

Answer 6

• Imperative/procedural
• Declarative
• Functional
• Object-oriented

Question 7

OO languages

Answer 7

Most used paradigm for commercial software.

Question 8

Global (Scope)

Answer 8

Visible anywhere.

Question 9

Local (Scope)

Answer 9

Visible only in local function/block

Question 10

Object (Scope)

Answer 10

Public: Visible from the object
Private: Only visible to the object
Protected: The object and child types

Question 11

Encapsulation

Answer 11

Make data inside private

Question 12

Abstraction

Answer 12

Only provide essential info to the outside world and hide the internals of the object.

Question 13

Class

Answer 13

A template describing what data and methods an object should support

Question 14

Vector

Answer 14

Able to get around the problems of arrays

Question 15

Destructor

Answer 15

Called when the object is destroyed.

Question 16

Buffer

Answer 16

A temporary store for data entered by the user

Question 17

Buffer overflow

Answer 17

Fill the array and continue writing until the return address

Question 18

Solutions for attacks.

Answer 18

• Avoid the use of functions that perform unbounded writes.
• Use fgets instead of gets. Lets you specify the maximum number of characters to read in.
• Modern compilers and operating systems also offer some protection.
• Write good code. Writing bad code leads to poor software.