Информатика | Консультация по вступительному испытанию

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2 Dec 202312:24

Summary

TLDRIn this video, Ksenia Evgenievna Pankina, a senior lecturer at the Department of Computer Systems, Networks, and Information Security at the Russian University of Transport, explains the structure and tasks involved in the entrance examination for Computer Science. The exam consists of 12 tasks covering topics such as information systems, coding, algorithms, computer networks, and logical expressions. Through sample tasks and solutions, Ksenia walks applicants through the types of questions and the required approach, providing an insightful guide to help them prepare for the exam. She encourages success and high results for all applicants.

Takeaways

  • 😀 Entrance exams for computer science consist of 12 tasks to be completed in 60 minutes.
  • 😀 Tasks cover various topics, including information systems, coding, algorithms, memory capacity, and computer networks.
  • 😀 Tasks 1, 6, 7, 8, 11, and 12 require entering answers in a designated space, while tasks 2, 3, 4, 5, 9, and 10 involve selecting the correct answer from multiple choices.
  • 😀 Sample Task 1 involves calculating the size of a file transferred over a connection with a specified data rate and time.
  • 😀 Task 2 asks to count the number of programs that can convert the number 3 to 15 using specific operations.
  • 😀 Task 3 involves calculating the total number of directories created on a newly formatted disk.
  • 😀 Task 4 requires solving a conditional logic puzzle to determine the name that satisfies specific conditions.
  • 😀 Task 5 involves encoding a sequence of letters into hexadecimal format using binary representations.
  • 😀 Task 6 requires comparing hexadecimal and octal numbers to find the one that satisfies a given inequality in binary form.
  • 😀 Task 10 involves a game where two players take turns adding stones to a pile, and the goal is to determine the minimum number of stones for a specific situation.
  • 😀 Task 11 is about analyzing tennis championship predictions and determining the final ranking of players based on given conditions.

Q & A

  • What is the format of the entrance examination for the computer science discipline?

    -The entrance examination is conducted in a test form consisting of 12 tasks, with 60 minutes allocated to complete all tasks.

  • What are the main subject areas covered in the computer science entrance exam?

    -The main subject areas include concepts of information, number systems, coding and decoding, program analysis, computer networks, mathematical logic, error elimination in programs, memory capacity, and more.

  • How are the tasks in the exam structured in terms of question types?

    -Some tasks require entering an answer in the appropriate line, while others involve selecting the correct answer from multiple options.

  • How do you calculate the file size in kilobytes in Task 1?

    -To calculate the file size, multiply the transfer rate (512,000 bits per second) by the time (16 seconds), then convert the result to kilobytes by dividing by 1024 and 8.

  • What is the method used to determine how many programs convert the number 3 to 15 in Task 2?

    -The number of programs is calculated by analyzing the maximum number of sequences of commands that can convert the number 3 to 15.

  • What is the solution to Task 3, which involves calculating the total number of directories on a newly formatted disk?

    -The solution involves counting the root directory and its subdirectories, including the child directories and their subdirectories. The total is 16 directories.

  • How do you solve Task 4 involving the truth of a logical statement?

    -You simplify the logical expression based on the conditions for consonant letters in a name and identify that only the name 'Ksenia' fits the condition.

  • How do you encode a sequence of letters into hexadecimal in Task 5?

    -First, replace the letters with their binary equivalents, then group the binary into tetrads and convert to hexadecimal.

  • How is Task 6 solved, which involves comparing hexadecimal and octal numbers in a binary inequality?

    -The hexadecimal and octal values are converted to decimal, and the inequality is solved by determining the correct number that satisfies the condition.

  • What is the approach to solving Task 8, which involves determining the earliest time to reach Krasnoye using a bus schedule?

    -The solution involves checking the available flights after the traveler arrives at the station and selecting the correct combination of buses to reach Krasnoye at the earliest time, which is 13:25.

  • How is Task 11 about tennis championship rankings solved?

    -By analyzing the fans' predictions and considering the condition that each fan is correct in only one of their predictions, the final ranking of the players is determined as: Natasha - 1st, Lyuda - 2nd, Rita - 3rd, Masha - 4th.

  • What pattern is followed to solve Task 12 regarding the occurrence of '1' in the first seven lines?

    -The pattern shows that the number of ones doubles in each subsequent line. The total number of ones in the first seven lines is calculated based on this doubling pattern.

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