2024 KSU CSE Final Review Actual Questions And Answers

2024 KSU CSE 1321 FINAL REVIEW ACTUAL QUESTIONS AND ANSWERS SOLVED AND VERIFIED 100% This algorithm works by selecting the smallest unsorted item in the list and then swapping it with the item in the next position to be filled. Ans - Selection This algorithm works using two sets. The sorted part is initially empty. We remove the entries from the unsorted portion one at a time and insert them in the the sorted part. Ans - Insertion This search compares the target value with the middle element in the collection, then ignores the half of the collection in which the target cannot exist. Ans Binary Sorting a collection makes searching for a value faster. Ans - True, using binary search We can use this notation to analyze an algorithm's efficiency. Ans - Big O Of the algorithms that we have studied in this module, which is the most efficient in practice? Ans- Insertion If an algorithm is described as O(n^2), then the time to process is directly proportional to the square of the size of the input data set. Ans- True This algorithm works by comparing each item in the list with the item next to it, and swapping them if required. This process repeats until the list is fully sorted. Ans Bubble This search scans one item at a time, without jumping to any item. Ans - Linear What does the following statement do? Create array grades[10] Ans - Declares grades to be a reference to an array Creates an instance of an array of 10 values Will allow valid indices in the range of 0 - 9 **All of these In a language that uses static typing, we are limited to only values of only one data type in the array. Ans - True What do you call the number that is used to pinpoint a specific element within an array? Ans - index or subscript Array indexes always starts at what value? Ans - 0 What will be the value of x[3] after the following code has been executed? Create array x [5] y←0 FOR (i = 0, i < 5, i++) x[i] ← y y ← y + 10 ENDFOR Ans👌👌 - x = [0,10,20,30,40] x[3] is 30 Answer: 30 What will be the results of the following code? ARRAY_SIZE ← 5 Create array x [ARRAY_SIZE] FOR (int i = 0, i < length of x, i++) x[i] ← 10 ENDFOR Ans👌👌 - All the values in the array are initialized to 10 What would be the results of the following code? Create array1 ← [33, 88, 11, 44, 99, 55] value ← array1[0] FOR (int i = 0, i < length of array1, i++) IF(array1[i] < value) THEN value ← array1[i]ENDIFENDFOR Ans👌👌 - Value contains the lowest value in array1. What would be the value of x[1] after the following code is executed? Create array x [22, 33, 44] CALL ARRAY_PROCESS with x ... METHOD ARRAY_PROCESS(parameter [] a) BEGIN FOR (int i = 0, i < length of x, i++) a[i] ←a[i] + 5 ENDFOR END ARRAY_PROCESS Ans👌👌 - 38 For the following code, what would be the value of str[2]? Create array myStrings ← ["abc", "def", "ghi", "jkl"] Ans👌👌 - A reference to the string "ghi" The index of the center position of a 3*3 2D array would be: Ans👌👌 - [1][1] Choose the answer that best describes the array created upon executing the following: Create array myStudents[30][6] Ans👌👌 - Creates a 2D array with 30 rows and six columns What value is stored in myNumbers[1][2] after the following code executes: y←3 Create array myNumbers[3][4]FOR rows in myNumbersFOR columns in myNumbers myNumbers ← y y ← y + 2 ENDFORENDFOR Ans👌👌 - 15 Select the code you would use to create a 2D array with 5 rows and 12 columns. Ans👌👌 - Create array myNums[5][12] The visibility level of a class field should be. Ans👌👌 - private A field can be of any data type that is legal in the language you are using. Ans👌👌 True A class field is also known as a(n): Ans👌👌 - attribute A class is analagous to a(n) Ans👌👌 - blueprint An object is a(n) Ans👌👌 - instance of the class This is a method that is automatically called when an instance of a class is created. Ans👌👌 - constructor If you write a constructor for a class, it should initialize all class fields. Ans👌👌 - True (not false, "should") This keyword is used to indicate a field belongs to a class, and not an instance. Ans👌👌 - static The new keyword makes a call to a class's constructor. Ans👌👌 - True Each instance of a class has its own set of fields. Ans👌👌 - True A class can have only one constructor. Ans👌👌 - False To find the classes that you need for an OO application, you identify all of the verbs in a description of a problem. Ans👌👌 - False A method of a class is anything that an instance can do or have done to it. Ans👌👌 True A method of a class cannot take in any parameters and cannot return any data. Ans👌👌 - False You should create your classes so that all fields of an instance can be accessed from other parts of the program. Ans👌👌 - False A method of a class should never interact with its object. Ans👌👌 - False A constructor must have a return type. Ans👌👌 - False The class constructor that runs is determined by the parameters passed. Ans👌👌 True Identify the keyword that an object can use to refer to itself. Ans👌👌 - this or self One or more objects may be created from a(n): Ans👌👌 - Class. Class objects normally have ________ that perform useful operations on their data. Ans👌👌 - methods When you are working with a ________, you are using a storage location that holds a piece of data. Ans👌👌 - primitive variable Data hiding, which means that critical data stored inside the object is protected from code outside the object, is accomplished by: Ans👌👌 - Using proper notation to set access to private on the class fields. Another term for an object of a class is: Ans👌👌 - Instance. For the following code, which statement is NOT true? public class Circle private radius public x private y Ans👌👌 - y is available to code that is written outside the Circle class. It is common practice in object-oriented programming to make all of a class's: Ans 👌👌 - Fields private. A constructor is a method that: Ans👌👌 - Performs initialization or setup operations. When calling a predefined method, you must pass how many parameters in the method call? Ans👌👌 - The same number as the parameter list In the following code, PRINT(num) is an example of _________. num ← 5.4 PRINT(num) num ← 0.0 Ans👌👌 - a void method call This part of a method is a collection of statements that are performed when the method is executed. Ans👌👌 - Method body Values that are sent into a method are called ________. Ans👌👌 - actual parameters or arguments When you pass an argument to a method, be sure that the argument's data type is compatible with: Ans👌👌 - The parameter variable's data type or intended use of the parameter. When code in a method changes data passed by value into its parameter, the original piece of data is also changed. Ans👌👌 - False A parameter variable's scope is: Ans👌👌 - The method in which the parameter is declared. The lifetime of a method's local variable is: Ans👌👌 - Only while the method is executing. What will be returned from the following method? METHOD addTwoNums() a ← 8.5 + 9.5 return a END addTwoNums Ans👌👌 - 18.0 This type of method performs a task and then terminates. Ans👌👌 - void Which of the following would be a valid method call for the following method? METHOD showProduct (parameters: num1, num2) product = num1 * num2 PRINT("The product is " + product) END showProduct Ans👌👌 - showProduct(10, 4); When passing by reference, it is actually a reference to the original place in memory of the object that is passed. Ans👌👌 - True The body of a method is demarcated by: Ans👌👌 - { } or indentation, as dictated by the language syntax. This keyword causes a method to end and sends a value back to the statement that called the method. Ans👌👌 - return A function header is a complete statement and should be terminated according to the rules of the language you are using. Ans👌👌 - False Arguments passed to a method MUST be passed in the same order that the parameters are defined in the method header. Ans👌👌 - True All methods must be called from the main method. Ans👌👌 - False This is a control structure that causes a statement or group of statements to repeat. Ans👌👌 - Loop If a loop does not contain within itself a way to terminate, it is called a(n): Ans👌👌 Infinite loop. Each repetition of a loop is known as what? Ans👌👌 - An iteration What will be the value of x after the following code is executed? x←0 WHILE ( x < 5 ) x←x+1 ENDWHILE Ans👌👌 - 5 In the following code, what values could be read into number to terminate the while loop? PRINT "Type in a number"READ input number ← user input WHILE ( number > 0 ) PRINT "No, that is not it. Try again." READ input number ← user input ENDWHILE Ans👌👌 - Numbers less than or equal to zero What will be the value of x after the following code is executed? x←1 WHILE (x < 0) x←x+1 ENDWHILE Ans👌👌 - 1 What will be the value of x after the following code is executed? x←5 WHILE (x >= 0) x ← x -1 ENDWHILE Ans👌👌 - -1 This type of loop should be used when you want your loop to iterate at least once. Ans👌👌 - do while What will be the value of x after the following code is executed? x ← 10 FOR(y ← 5, y < 20, y ← y + 5) x←x+y ENDFOR Ans👌👌 - 40 What will be printed after the following code is executed? FOR(number ← 5, number <= 15, number ← number + 3) PRINT number + ", " ENDFOR Ans👌👌 - 5, 8, 11, 14, This type of loop is ideal in situations where the exact number of iterations is known. Ans👌👌 - for loop What will be the value of x after the following code is executed? x ← 0, y ← 2 WHILE(x < 10) x←x+y y←y+1 ENDWHILE Ans👌👌 - 14 How many times will the following for loop be executed? FOR (count ←1, count <= 10, count ← count +1) PRINTLINE "CSE 1321 is great!!!" END FOR Ans👌👌 - 10 In the following code, what values could be read into number to terminate the while loop? PRINT "Enter a number: READ user input number ← user input WHILE (number < 1 or number > 10) PRINT "Enter another number: " READ user input number ← user input END WHILE Ans👌👌 - Numbers in the range 1 - 10 In counter-controlled repetition, we can set the incrementation to any value. Ans👌👌 - True This keyword will cause the loop to terminate immediately. Ans👌👌 - break The ________ statement is used to make simple decisions in a program . Ans👌👌 - if A Boolean expression is one that is either: Ans👌👌 - true or false Which of the following expressions will determine whether x is less than or equal to y? Ans👌👌 - x <= y Which one of the following is the not equal operator? Ans👌👌 - != The ________ statement lets the value of a variable or expression determine where the program will branch to. Ans👌👌 - switch What will be displayed to the console after the following code is executed? grade ← 70 IF (grade < 60) THEN PRINT("You failed.") END IF PRINT ("Your grade is " + grade) Ans👌👌 - Your grade is 70 What will be displayed on the console after the following code is executed? mpg ← 30; IF (mpg < 20) THEN PRINT("That is poor gas mileage.") ELSE PRINT("That is acceptable gas mileage.") ENDIF Ans👌👌 - That is acceptable gas mileage. What will be displayed on the console after the following code is executed? price ← 10 cash ← 20 IF (price < cash) THEN PRINT ("You can afford it. ")ENDIF IF (price > 5) PRINT ("The price is too high. ")ENDIF Ans👌👌 - You can afford it. The price is too high. What will be displayed on the console after the following code is executed? x ← 22 IF (x > 0) THEN PRINT ("A") ELSE IF (x > 10 ) THEN PRINT ("B") ELSE PRINT ("C") END IF Ans👌👌 - A What will be displayed on the console after the following code is executed? x ← 10 IF (x > 10) THEN PRINT ("AB") ELSE PRINT ("CD")ENDIF PRINT ("E") Ans👌👌 - None of the other answers Limitations regarding where a variable can and cannot be seen inside of a program is know as: Ans👌👌 - scope Selection structures allow us the ability to modify the order of statement execution based on boolean expressions. Ans👌👌 - True This alternative to an if will cause a block of code to execute if a Boolean expression is false. Ans👌👌 - else This statement tests a series of conditions and will execute a block of code when it finds one is true. Ans👌👌 - is-else-if This logical operator will return true if either or both conditions are true. Ans👌👌 Logical OR What will display to the screen when the following code executes? age ← 55 IF(age >= 16 && age <=80) THEN PRINTLINE("You can drive!") ENDIF PRINT ("Be safe!") Ans👌👌 - You can drive! Be safe! Indentation is a requirement of all languages and will code will not run correctly if not used. Ans👌👌 - False The relational operator to test equality is: Ans👌👌 - == ____________________ must be declared before they can have values assigned to them or be used in a program. Ans👌👌 - Variables In a statically typed language, the boolean data type may contain which values? Ans👌👌 - true or false In a statically typed language, if x has been declared an int, which of the following statements is invalid? Ans👌👌 - x = 1,000; What is the result of the following expression?10 + 5 * 3 - 20 Ans👌👌 - 5 What will be displayed as a result of executing the following code? x ← 5, y ← 20 x += 32; y /= 4; PRINT("x = " + x + ", y = " + y); Ans👌👌 - x = 37, y = 5 In pseudocode, it is not necessary to include the data type when you declare a variable. Ans👌👌 - True Variable names cannot contain which of the following? Ans👌👌 - spaces and special characters Select the appropriate data type for a variable to store your name in a staticallytyped language: Ans👌👌 - string Select the appropriate data type for a variable to store the price of an item in a statically-typed language: Ans👌👌 - double or float Select the appropriate data type for a variable to store the number of eggs that represent a dozen, in a statically-typed language: Ans👌👌 - integer Select the appropriate data type for a variable to store your letter grade for CSE 1321, in a statically-typed language: Ans👌👌 - char Select the appropriate data type for a variable to store whether or not are registered for a class, in a statically-typed language: Ans👌👌 - boolean Select the appropriate data type for a variable to store your GPA, in a staticallytyped language: Ans👌👌 - double or float The symbol used for assigning a value to a variable is the: Ans👌👌 - = A value that is written into the code of a program exactly as its meant to be interpreted is a: Ans👌👌 - literal Programmers are able to annotate their code using special character(s) provided by syntax of a language. These annotations are ignored by the compiler. Ans👌👌 - True Identify the operator that you can use to determine if a number is even or odd. Ans👌👌 - % (modulus, mod) Given x ← 2 of the following expressions is equivalent to: x ← x + 5 Ans👌👌 - x += 5 Most programming languages are written to coincide with standard mathematical order of operations, yet is it a good idea to use parentheses to explicitly define expected behavior. Ans👌👌 - True To become a good programmer, the knowledge of a particular language is secondary to: Ans👌👌 - the ability to solve problems. The computer can do such a wide variety of tasks because: Ans👌👌 - It can be programmed. A computer program is: Ans👌👌 - A set of instructions that enable the computer to solve a problem or perform a task. The code that we write as programmers is known as: Ans👌👌 - source code The IDE helps us identify: Ans👌👌 - syntax errors Once you have read and understand the problem for which you are trying to create a program to solve, you should first design a(n): Ans👌👌 - algorithim Which is the method we will use in CSE 1321 for expressing an algorithm? Ans👌👌 pseudocode Logic errors are harder to diagnose and correct than syntax errors. Ans👌👌 - True We are using pseudocode to write algorithms because it is not concerned with syntax so it is easier to focus on concepts. Ans👌👌 - True Programming language syntax is the hardest part of programming. Ans👌👌 - False