Final

Question 1

When was the first calculation device created?

Answer 1

1642

Question 2

How much space do you think the ENIAC computer occupies?

Answer 2

It occupied the 50-by-30-foot (15-by-9-metre) basement

Question 3

What are the two main elements of a computer system?

Answer 3

Hardware and Software

Question 4

What is the central processing unit(CPU)?

Answer 4

brain of the computer, the most expensive piece of hardware that carries out arithmetic and logical operations

Question 5

Random Access Memory

Answer 5

connected to a cp, programs must be loaded into main memory before being executed, all programs must also be brought into main memory in order to be executed before it can be manipulated. Once the computer shuts off all memory is lost

Question 6

T/F: Main memory is an ordered sequence of memory cells

Answer 6

true

Question 7

What is secondary storage?

Answer 7

A device that stores information permanently

Question 8

What are examples of secondary storage?

Answer 8

Hard disks, flash drives, CD-Roms

Question 9

What is an input device and what are examples?

Answer 9

feeds data and programs into computers. for example, keyboard, mouse, scanner, camera

Question 10

What is an output device and what are examples?

Answer 10

displays the results, examples would be monitor, printer, or secondary storage

Question 11

If you are asked to buy a computer to analyze and process a large amount of data
(12+ GB), which computer will you select based on the given specification?

Answer 11

hard drive: 560 GB
RAM: 64 GB
processor: Intel Xeon

Question 12

What is an operating system?

Answer 12

monitors the overall activity of a computer

Question 13

What are the following steps to process a C++ program?

Answer 13

problem understanding, analysis,

Question 14

What is an algorithm?

Answer 14

step-by-step problem-solving process

Question 15

What is a structured design?

Answer 15

involves dividing a problem into smaller subproblems

Question 16

Object-oriented design

Answer 16

identifying components called objects, and also determines how objects interact with each other

Question 18

Is there any difference between computer program and programming?

Answer 18

computer program is a sequence of statements whose objective is to accomplish a task, computer programming is the process of planning and creating a program

Question 19

what is a subprogram or function?

Answer 19

a collection of statements

Question 20

syntax rules

Answer 20

rules that specify which statements are legal or valid

Question 21

semantic rules

Answer 21

determine the meaning of the instructions

Question 22

programming language

Answer 22

set of rules, symbols, and special words

Question 23

what is a data type?

Answer 23

set of values together with a set of allowed operations

Question 24

The expression static_cast<double>(8 + 15) evaluate to</double>

Answer 24

23.0

Question 25

what is a stream?

Answer 25

sequence of characters from the source to the destination

Question 26

Input stream

Answer 26

sequence of characters from an input device to the computer

Question 27

Output stream

Answer 27

sequence of characters from the computer to an output device

Question 28

You need to include the library ______ to receive characters from the keyboard

Answer 28

iostream

Question 29

Which symbol represents the extraction operation in C++?

Answer 29

>>

Question 30

Suppose you have the following variable declaration: int a; double x; char y; Select the correct value storage in memory: Statement Input cin >> a 3.45 cin>> y '48

Answer 30

3,4

Question 31

Does the following lines of code the same task ? int y; 1. cin >> y; 2. cin.get(y);

Answer 31

No, the two lines of code you provided do not perform the same task. Let's break down each line: cin >> y;: This line reads input from the standard input (usually the keyboard) and stores it in the variable y. The >> operator is used for input extraction. cin.get(y);: This line uses the get member function of the cin object to read a single character from the standard input and stores its ASCII value in the variable y. It doesn't read an integer value directly; instead, it reads a character.

Question 32

The following line of code will print: int a, b; cin >> a; cin.ignore(100,'\n') cin >> b; cout << a <<", "<

Answer 32

2,3

Question 33

In C++ the setprecision(n) manipulator is use to _____

Answer 33

define the number of digits to be printed

Question 34

Suppose the input value is 34.76345. What are the output of the following two line of code? cout<

Answer 34

34.7634 34.76

Question 35

To use the manipulators; setw, left, right. You need to inlcude the library

Answer 35

iomanip