Programming Chapter 1-4 Test

1. 1Which of the following is the correct way to declare comments?

   1. A//
   2. B#
   3. C/*?
   4. D/*.
2. 2Which preprocessor directive is needed to perform the cout/cin commands in C++ (assume we are using namespace std)

   1. A#include <stddlib.h>
   2. B#include <stdio.h>
   3. C#include <iostream>
   4. D#include <namespace>
3. 3Why are semicolons used in C++ and more modern version of C?

   1. ASemicolons make code cleaner
   2. BSemicolons are used to mark the beginning and end of a function, similar to python
   3. CSemicolons are only needed in Object oriented programming
   4. DSemicolons are used to mark the end a command
4. 4Which of the following are valid ways to declare a variable in C++? (this is a MULTIPLE answered question, select all that apply)

   1. Aint x = 5;
   2. Bint y = 3, 4;
   3. Cint[] x = {3, 3};
   4. Dint x, y = 3;
   5. Eint z = 4
5. 5Which of the following is a valid way to get the total size of a datatype integer?

   1. Aint size = sizeof(char);
   2. Bint size = size(int);
   3. Cint size = sizeof(int);
   4. Dint size = sizeof(std::uint16_);
6. 6Whats wrong with this program?
   int Main(int argc, char* argv[])
   {
   return 0;
   }

   1. AReturn 0 must have an indent
   2. BThe parameters passed are invalid
   3. CThe main function cannot be capitalized
   4. DAll of the above are correct
7. 7Which of the following is the right way to declare a character?

   1. Achar 12char = 'A';
   2. Bchar char12 = ' ';
   3. Cchar char12 = "A";
   4. Dchar 12char = "5";
8. 8Whats wrong with this function?
   void getArea(int w, int h){
   return w * h;
   }

   1. AA. The curly bracket has to be declared on a seperate line
   2. BB. Returned values are not allowed for a return type 'void'
   3. CC. getArea() has to return an integer
   4. DD. A and C are correct
   5. EE. B and C are correct
   6. FF. A, B, and C are correct
9. 9What is a double data type short for?

   1. ADouble precision of a 4 byte integer
   2. BDouble data
   3. CDouble precision of a floating point type
   4. DDouble is not a short form for anything
10. 10Which of the following is not a built in data type?

    1. Aint
    2. Bunion
    3. Cwide character
    4. Dvoid

11. 11Which of the following is a user defined data type?

    1. Aarray
    2. Bfunction pointer
    3. Cinteger pointer
    4. Dstruct
12. 12Which operator is used to get the remainder of a division?

    1. A%
    2. B/
    3. C?
    4. DR
13. 13What will this program print on screen?
    #include <iostream>
    int main()
    {
    int num1 = 40;
    int num2 = 10;
    int num3 = num1 / num2;
    int num4 = (num3 + 1) % 4;
    std::cout << num4 << std::endl;
    
    return 0;
    }

    1. Acompiler error
    2. B1
    3. C2
    4. D3
    5. E4
    6. F5
14. 14Which of the following is not true about if statements?

    1. AAn if statement will execute a block of code in curly brackets if the condition is true
    2. BAn if statement does not need curly brackets for only one command that should be executed if the condition comes to true
    3. CAn if statement will skip the code inside a body if the condition is false
    4. DAll of the above are correct
    5. EAll of the above are incorrect
15. 15What will this program output?
    #include <iostream>
    using namespace std;
    int main()
    {
    int a = 4;
    int b = 3;
    const int c = a * b;
    
    if (a < b)
    {
    cout << "Were here" << endl;
    }
    else if (a * 3 == c)
    {
    cout << "Were over here" << endl;
    }
    else if (false)
    {
    cout << "Were over here instead" << endl;
    }
    else
    {
    cout << "Were getting nowhere" << endl;
    }
    
    return 0;
    }

    1. AWere over here
    2. BWere here
    3. CWere over here instead
    4. DWere getting nowhere
    5. ECompile error
16. 16What will the following program output?
    #include <iostream>
    using namespace std;
    
    int getArea(int width, int height, int depth)
    {
    return width * height * depth;
    }
    
    int main()
    {
    cout << getArea(2, 2, 2) - 4 << endl;
    
    return 0;
    }
    

    1. A4
    2. B8
    3. C12
    4. D16
17. 17What will the following program output?
    #include <iostream>
    using namespace std;
    int main()
    {
    int num=90;
    if( num < 100 )
    {
    cout<<"number is less than 100"<<endl;
    if(num > 50)
    {
    cout<<"number is greater than 50";
    }
    }
    return 0;
    }

    1. Anumber is greater than 100
       number is less than 50
    2. Bnumber is less than 100
       number is greater than 50
    3. Cnumber is less than 50
    4. DCompile error
    5. ENone of the above
18. 18True or false: The code written in Question 17 is called object code

    1. AVerdadero
    2. BFalso
19. 19How many bytes does a float take up in memory?

    1. A1
    2. B2
    3. C4
    4. D8
    5. E16
20. 20How many bytes are in 24 bits?

    1. A3
    2. B4
    3. C1
    4. D2
21. 21Which of the following is an example of an input device?

    1. Aspeaker
    2. Bmonitor
    3. Cmouse
    4. Dheadphones
22. 22How many bytes are stored in a character?

    1. A1
    2. B2
    3. C4
    4. D8
23. 23Which of the following is not a valid expression for declaring a boolean variable?

    1. Abool flag = false;
    2. Bbool flag = 2;
    3. Cbool flag = true;
    4. Dbool flag = 1;
    5. E#define EXPR true
       bool flag = EXPR;
24. 24What will the following program output?
    #include <iostream>
    using namespace std;
    int main(){
    char ch='b';
    switch(ch) {
    case 'd': cout<<"Case1 ";
    break;
    case 'b': cout<<"Case2 ";
    break;
    case 'x': cout<<"Case3 ";
    break;
    case 'y': cout<<"Case4 ";
    break;
    default: cout<<"Default ";
    }
    return 0;
    }

    1. ACompile error
    2. BCase 2
    3. CCase 1
    4. DCase 4
    5. ECase 5
    6. FDefault
25. 25We use the expression system("pause") to pause the console

    1. AVerdadero
    2. BFalso
26. 26What is the equivalent of the following expression?
    int x = 5;
    Expression: -> x += 1; <-

    1. Ax++;
    2. Bx+++;
    3. Cx+;
    4. DC++
    5. Ex--
27. 27Whats wrong with the following program?
    int main()
    {
    int arr[] = { 1, 2, 3 }
    }

    1. ANo semicolon
    2. BForgot to include <iostream>
    3. CForgot to write using namespace std;
    4. DNothing is wrong here
28. 28True or false: We use std::endl to end the line on the console

    1. AVerdadero
    2. BFalso
29. 29Which of the following is an example of object code?

    1. A0xfff
    2. B01011011
    3. Creturn 0;
    4. DNone of the above
30. 30What is the equivalent of this statement?
    0xff

    1. A255
    2. B2.147 billion
    3. C4095
    4. D65535

Descripción

Grade 12 Introduction to Programming Test sobre Programming Chapter 1-4 Test, creado por Liam Blake el 07/10/2021.

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Liam Blake

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