Master Computers and Technology with Fun Quizzes & Brain Teasers!

1.Start vim to create a new file named pizza. vim pizza 2.Type i (lowercase i for input to put vim in Input mode and enter the following text, pressing RETURN at the end of each line. Ignore typing mistakes you make for now. Press ESCAPE when you are done typing to put vim back in Command mode. Pizza is an oven-baked, flat, round bread typically topped with a tomato sauce, cheese and various toppings. Pizza was originally invented in Naples, Italy, and the dish has since become popular in many parts of the world. (from Wikipedia) I
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Complete data are very rare because some data are usually missing. There are typically four strategies to handle missing data. Ignore the variables with missing data. Delete the records that have some missing values. Impute the missing values (i.e., simply fill in the missing values with some other value, such as the mean of similar records with data). Use a data mining technique that can handle missing values, such as CART, which is one of a few techniques that handle missing data pretty well. Suppose you are working on a project to model a hotel company's customer base. The goal is to determine which customer attributes are correlated with a high number of hotel stays. You have access to data from a customer survey, but one field (which is optional) is yearly income and has some missing values equaling roughly 5% of the records. Which of the strategies should be used? Explain why. Suppose you chose the third strategy. Explain how you would impute the missing incomes.
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____ is scientifically seeking and discovering facts.
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How do ice and water on the ground affect incoming solar radiation? They filter 22 percent of solar radiation that reaches the surface. They reflect 4 percent of solar radiation that reaches the surface. They absorb 100 percent of solar radiation that reaches the surface. They scatter 5 percent of solar radiation that reaches the surface.
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Within a word processing program, predesigned files that have layout and some page elements already completed are calledtext boxestemplates.framestypography
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What is output by the code below?int[] nums = new int[10];for (int i=0; i < nums.length; i++){ nums[i] = i*2;}System.out.println(nums[5]); a.16 b. 10 c. 14 d. 18 e. 12
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You are building a predictive solution based on web server log data. The data is collected in a comma-separated values (CSV) format that always includes the following fields: date: string time: string client_ip: string server_ip: string url_stem: string url_query: string client_bytes: integer server_bytes: integer You want to load the data into a DataFrame for analysis. You must load the data in the correct format while minimizing the processing overhead on the Spark cluster. What should you do? Load the data as lines of text into an RDD, then split the text based on a comma-delimiter and load the RDD into a DataFrame. Define a schema for the data, then read the data from the CSV file into a DataFrame using the schema. Read the data from the CSV file into a DataFrame, infering the schema. Convert the data to tab-delimited format, then read the data from the text file into a DataFrame, infering the schema.
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What invention do you wish existed during this quarantine? (I have to do a sales pitch for an invention in Spanish, the invention can be related to quarantine or after quarantine too.)
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Given the following Java code:public static boolean f(int [] arr) {for (int i = 0; i < arr.length - 1; i++) {for (int j = i + 1; j < arr.length; j++) {if (arr[i] < arr[j]) // *HERE*return false;}return true;}(i) Find the number of times the comparison marked by *HERE* will be evaluated for each input:{1, 2}{10, 20, 30}{30, 20, 10}{-4, 7, 1}(ii) For an array of size ????, what is the big-oh runtime of this code in the worst case?
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The program 4 should first tell users that this is a word analysis file. For any user-given text file, the program will read, analyze, and write each word with the line numbers where the word is found in an output file. A word may appear in multiple lines. A word shows more than once at a line, the line number will be only recorded one time.Ask a user to enter the name of a text file. Using try/except for invalid user input. Then the program reads the contents of the text file and create a dictionary in which the key-value pairs are described as follows:" Key. The key are the individual words found in the file. "Value. Each value is a list that contains the line numbers in the file where the word (the key) is found. Be aware that a list may have only one element.Once the dictionary has been built, the program should create another text file, named "word_index.txt". Next, write the contents of the dictionary to the file as an alphabetical listing of the words that are stored as keys in the dictionary (sorting the keys), along with the line numbers where the words appear in the original file. Please see the sample file for reference.Looking to seeing everyone to submit a well-done program! Here are some tips: "Documents/Comments of your program (Never more) "Testing your program by the given two files, Kennedy.txt and romeo.txt. The output file of the Kennedy.txt, "Kennedy_index.txt" and the output file for romeo.txt, "romeo_index.txt,. Please compare your program files with them. "Text File to be analyzed: romeo.txtArise: 5But: 1It: 3Juliet: 3Who: 7already: 7and: 3, 5, 7breaks: 1east: 3envious: 5fair: 5grief: 7is: 3, 7kill: 5light: 1moon: 5pale: 7sick: 7soft: 1sun: 3, 5the: 3, 5through: 1what: 1window: 1with: 7yonder: 1Text File to be analyzed: Kennedy.txtWe: 1a: 1, 2, 4an: 3as: 4, 5, 6beginning: 4but: 2celebration: 2change: 6end: 3freedom: 3not: 1observe: 1of: 2, 3party: 2renewal: 5signifying: 5symbolizing: 3today: 1victory: 1well: 4, 5romeo.txt But soft what light through yonder window breaks It is the east and Juliet is the sun Arise fair sun and kill the envious moon Who is already sick and pale with griefKennedy.txt We observe today not a victory of party but a celebration of freedom symbolizing an end as well as a beginning signifying renewal as well as change
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Using the College Registration example from Section 6.7.3 as a starting point, do the following:-Recode the logic sing CMP and conditional jump instructions (instead of the .IF and .ELSEIF directives).-Perform range checking on the credits value; it cannot be less than 1 or greater than 30. If an invalid entry is discovered, display an appropriate error message.-Prompt the user for the grade average and credits values.Display a message that shows the outcome of the evaluation, such as "The student can register" or "The student cannot register".6.7.3 example:.dataTRUE = 1FALSE = 0gradeAverage WORD 275 ; test valuecredits WORD 12 ; test valueOkToRegister BYTE ?.codemain PROCmov OkToRegister,FALSE.IF gradeAverage > 350mov OkToRegister,TRUE.ELSEIF (gradeAverage > 250) && (credits
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Write a C++ program that opens and reads file question2.txt. File question1.txt has 3 students and 3 grades of each. You program should read values from file and assign values to 4 variables: (string) name, (double) grade1, (double) grade2, (double) grade3. Then, it should calculate the average grade of each student with the precision of 2 (use setprecision(n) function from header file) and find maximum and minimum grade in the class. Finally, you should have a report on both: console screen Output file named output2.txt in the following output format: Max Grade max Min Grade min Adam ave_grade John ave_grade Bill ave_grade
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If many programs are kept in main memory, then there is almostalways another program ready to run on the CPU when a page faultoccurs. Thus, CPU utilization is kept high. If, however, we allocate alarge amount of physical memory to just a few of the programs, theneach program produces a smaller number of page faults. Thus, CPUutilization is kept high among the programs in memory. What would the working set algorithm try to accomplish, and why?(Hint: These two cases represent extremes that could lead toproblematic behavior.)
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Write a method that sums all the numbers in the major diagonal in an n x n matrix of double values using the following header: public static double sumMajorDiagonal(double[][] m) Write a test program that first prompts the user to enter the dimension n of an n x n matrix, then asks them to enter the matrix row by row (with the elements separated by spaces). The program should then print out the sum of the major diagonal of the matrix.
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Which statement is true about test anxiety?Extreme anxiety usually motivates students to do well on tests. Pre-test anxiety is abnormal.Pre-test anxiety can be overcome.Extreme anxiety causes students to feel calm and relaxed.
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Write a function with this prototype: #include void numbers(ostream& outs, const string& prefix, unsigned int levels);The function prints output to the ostream outs. The output consists of the String prefix followed by "section numbers" of the form 1.1., 1.2., 1.3., and so on. The levels argument determines how many levels the section numbers have. For example, if levels is 2, then the section numbers have the form x.y. If levels is 3, then section numbers have the form x.y.z. The digits permitted in each level are always '1' through '9'. As an example, if prefix is the string "THERBLIG" and levels is 2, then the function would start by printing:THERBLIG1.1.THERBLIG1.2.THERBLIG1.3.and ends by printing:THERBLIG9.7.THERBLIG9.8.THERBLIG9.9.The stopping case occurs when levels reaches zero (in which case the prefix is printed once by itself followed by nothing else).The string class from has many manipulation functions, but you'll need only the ability to make a new string which consists of prefix followed by another character (such as '1') and a period ('.'). If s is the string that you want to create and c is the digit character (such as '1'), then the following statement will correctly form s:s = (prefix + c) + '.';This new string s can be passed as a parameter to recursive calls of the function.
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You are planning to use Spark to create a machine learning model that recommends restaurants to users based on user details and past ratings for restaurants What is the simplest way to implement this model? Use a Logistic Regression algorithm to train a classifier. Use a K-Means algorithm to create clusters. Use an alternating least squares (ALS) algorithm to create a collaborative filtering solution. Use a Decision Trees algorithm to train a regression model.
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Which of the following is not a benefit of active listening?
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A LAN is usually confined in a single building.TrueFalse
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How do you access the dark web? What are the negatives of doing this?
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What is wrong with the code below?print(ICT is the best)
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Carolyn is creating a new contact for a colleague in another organization. Which piece of information is required to save the contact? first nameemail address phone numberjob title
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It is only likely for a guest to receive outstanding service at luxury brands. That's why Ritz-Carlton, Mandarin Oriental, Four Seasons, and others are the best at what they do.
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In which type of attack does the user respond to several external communication requests? Harry wants to watch a movie online by visiting an online movie-streaming website. However, as he clicks on the movie link, several other advertisement pop-ups appear. They slow down the streaming of the movie. Harry is a victim of a attack.
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