Comp181 Midterm Examination, Fall Name Surname: Number: 90 min. 18/11/09

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1 Comp181 Midterm Examination, Fall Name Surname: Number: 90 min. 18/11/09 Answer ALL off the following questions. 1.What does the term hardware refer to? a. The relative difficulty of programming b. The physical components that a computer is made of c. The way a computer's storage space is organized d. The logical flow of instructions. 2. At the heart of a computer is its central processing unit. The CPU's job is: a. To fetch instructions b. To carry out the operations commanded by the instructions c. To produce some outcome or resultant information d. All of the above 3.An Integrated Development Environment typically consists of: a. A text editor b. A compiler c. A debugger d. All of the above 4.The purpose of a memory address is: a. To identify the location of a byte in memory b. To prevent multitasking c. To obtain an algorithm d. To improve the effectiveness of high-level languages 5.The programming process consists of several steps, which include: a. Input, Processing, and Output b. Key Words, Operators, and Punctuation c. Design, Creation, Testing, and Debugging d. Syntax, Logic, and Error Handling 6.Programmer-defined names of memory locations that may hold data are: a. Operators b. Variables c. Syntax d. Operands.

2 7.The computer's main memory is commonly known as: a. The hard disk b. The floppy disk c. RAM d. Secondary storage 8.The decodes an instruction and generates electrical signals. a. Arithmetic and Logic Unit b. Main memory c. BIOS d. Control Unit 9.A(n) is a set of instructions that the computer follows to solve a problem. a. Compiler b. Linker c. Program d. Operator 10. are used to translate each source code instruction into the appropriate machine language instruction. a. Modules b. Library routines c. Compilers d. Preprocessor directives 11.A set of well-defined steps for performing a task or solving a problem is known as a(n): a. Hierarchy b. Algorithm c. Central Processing Unit d. Encoded instruction 12.The statements written by the programmer are called: a. Syntax b. Object code c. Source code d. Runtime libraries 13.Internally, the CPU consists of two parts: a. The Output Device and the Input Device b. The Software and the Hardware c. The Control Unit and the Arithmetic and Logic Unit d. The Single-task Device and the Multi-task Device 14.Even when there is no power to the computer, data can be held in: a. Secondary storage b. The Input Device c. The Output Device d. The Algorithm

3 15.Words that have a special meaning and may be used only for their intended purpose are known as: a. Operators b. Programmer Defined Words c. Key Words d. Syntax 16.The name for a memory location that may hold data is: a. Key Word b. Syntax c. Operator d. Variable 17..This is a complete instruction that causes the computer to perform some action. a. Line b. Statement c. Variable d. Key Word 18.An example of a secondary storage device is: a. The computer's main memory b. The keyboard c. The monitor d. A hard disk 19.Mistakes that cause a running program to produce incorrect results are called: a. Syntax errors b. Logic errors c. Compiler errors d. Linker errors 20.Computer programs are also known as a. hardware b. firmware c. software d. silverware 21.This is a volatile type of memory, used for temporary storage. a. A floppy disk b. ALU c. RAM d. A hard disk 22.This is a set of rules that must be followed when constructing a program. a. Syntax b. Punctuation c. Portability d. Operators e. Key words

4 23.In a C++ program, two slash marks ( // ) indicate: a. The end of a statement b. The beginning of a comment c. The end of the program d. The beginning of a block of code 24.A statement that starts with a # is called a: a. Comment b. Function c. Preprocessor directive d. Key word. 25.The is/are used to display information on the computer's screen. a. Opening and closing braces b. Opening and closing quotation marks c. cout object d. Backslash 26.A variable whose value can be either true or false is of this data type. a. binary b. bool c. T/F d. float. 27. After execution of the following code, what will be the value of input_value if the value 0 is entered at the keyboard at run time? cin >> input_value; if (input_value > 5) input_value = input_value + 5; else if (input_value > 2) input_value = input_value + 10; else input_value = input_value + 15; a. 15 b. 10 c. 25 d. 0 e What will the following segment of code output? You can assume the user enters a grade of 90 from the keyboard. cout << "Enter a test score: "; cin >> test_score; if (test_score < 60); cout << "You failed the test!" << endl; if (test_score > 60) cout << "You passed the test!" << endl; else

5 cout << "You need to study for the next test!"; a. You failed the test! b. You passed the test! c. You failed the test! You passed the test! d. You failed the test! You did poorly on the test! 29.What is the output of the following segment of code if 4 is input by the user when asked to enter a number? int num; int total = 0; cout << "Enter a number from 1 to 10: "; cin >> num; switch (num) { case 1: case 2: total = 5; case 3: total = 10; case 4: total = total + 3; case 8: total = total + 6; default: total = total + 4; } cout << total << endl; a. 0 b. 3 c. 13 d. 28 e. None of these 30.What will be the value of result after the following code has been executed? int a = 60; int b = 15; int result = 10; if (a = b) result *= 2;

6 a. 10 b. 120 c. 20 d. This code will not compile 31.Correct the errors in the following program 1 include <iostream>; 2 using namespace std; 3 4 int Main() 5 { 6 const int number = 5; 7 cin>>number; 8 if (number >= 0 && <= 100) 9 cout << "passed.\n"; 10 else 11 cout << "failed.\n"; 12 // return 0; 13 } 32. Write down the C++ equivalents of the following mathematical expression c + b d * e a + b 33.Write down the mathematical expression of the following C++ expression A/( B D)* E 34.Find the results of i)3/ 5 ii)3%5, iii)7.0/ 2 iv)8 (3 + 9/ 2) + 2*5

7 35. Write down a program segment that accepts lengths of two adjacent sides, b and c, of a triangle and the angle, α, between them, in degrees then calculates the length of the third side, a, by using the formula a b c 2bccos( α) = +. Then obtain a trace table for b=3, c=4, α=60 0.

8 36. Draw a flowchart that finds the average of given three different numbers and also the maximum, and the minimum. Please give the equivalent C++ code for your flowchart.

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