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Questions and Answers

What is the purpose of the ChangeGender function?

  • To replace the word 'he' with 'she' in a text file (correct)
  • To count the number of lines in a text file
  • To read and print the content of a file
  • To create a new text file with gender changes
  • Which method correctly handles the file to ensure it's closed after reading?

  • Using a try-except block
  • Using the open function without closing it explicitly
  • Using a with statement for file handling (correct)
  • Opening the file in append mode
  • What will happen if the file 'BIOPIC.TXT' does not exist when the ChangeGender function is executed?

  • The function will still attempt to read the file
  • The function will print a message and continue
  • The program will create the file automatically
  • An error will be raised and execution will stop (correct)
  • What is a key characteristic of the Count_Line function?

    <p>It reads lines and counts them without alteration (D)</p> Signup and view all the answers

    Which of the following best describes how 'he' is replaced in the ChangeGender function?

    <p>By scanning through each word and checking for a match (C)</p> Signup and view all the answers

    What will be the output of the given Python execution for the SQL Table PASSENGERS?

    <p>RAVI KUMAR NISHANT JAIN DEEPAK PRAKASH (D)</p> Signup and view all the answers

    Which SQL constraint ensures that a column contains unique values?

    <p>UNIQUE (B)</p> Signup and view all the answers

    What type of error would occur with the Python function if a call to Change() is made incorrectly?

    <p>NameError (B)</p> Signup and view all the answers

    In the function change(A), what is the purpose of the for loop?

    <p>To sum the first half of the list's elements, doubled (A)</p> Signup and view all the answers

    What will be the return value of the Sum3(L) function if L = [1, 2, 3, 13, 23]?

    <p>26 (B)</p> Signup and view all the answers

    Which statement correctly describes the PRIMARY KEY constraint in SQL?

    <p>It uniquely identifies each row in a table (B)</p> Signup and view all the answers

    What is the correct output produced by the given Python Print function if there are no errors?

    <p>Output is: 190 (A)</p> Signup and view all the answers

    Which SQL constraint specifies that a column must not contain a NULL value?

    <p>NOT NULL (C)</p> Signup and view all the answers

    What does PPP stand for in the context of computer networks?

    <p>Point-to-Point Protocol (C)</p> Signup and view all the answers

    Which of the following correctly expands VoIP?

    <p>Voice over Internet Protocol (A)</p> Signup and view all the answers

    What is the primary characteristic of positional parameters in Python functions?

    <p>They take values based on their position in the function call. (D)</p> Signup and view all the answers

    What does GSM stand for in telecommunications?

    <p>Global System for Mobile Communication (C)</p> Signup and view all the answers

    In the given example, which variable represents the parameter for Y in the function LEqn?

    <p>A1 (A)</p> Signup and view all the answers

    What is the purpose of a default parameter in a Python function?

    <p>It provides a fallback value if no argument is given. (C)</p> Signup and view all the answers

    Which of the following is an example of a valid domain name?

    <p>w3schools.com (D)</p> Signup and view all the answers

    What does WLL signify in the context of communication technology?

    <p>Wireless Local Loop (A)</p> Signup and view all the answers

    What is the purpose of the SHOWHIGH function in the provided code?

    <p>To display plant prices that are greater than 500. (B)</p> Signup and view all the answers

    Which part of the code ensures that new records can be added until the user decides to stop?

    <p>Using a while loop to check user input. (D)</p> Signup and view all the answers

    How is the file 'PATIENTS.dat' supposed to be read based on the function definition?

    <p>Using binary mode to access the data. (B)</p> Signup and view all the answers

    What is the expected output of the countrec() function for patients with DISEASE as 'COVID-19'?

    <p>It will display details and count of COVID-19 patients only. (C)</p> Signup and view all the answers

    What is the criteria for displaying records in the SHOWHIGH function?

    <p>Records with a price greater than 500. (D)</p> Signup and view all the answers

    Which SQL statement correctly retrieves all information about CUSTOMERs whose NAME starts with 'A'?

    <p>SELECT * FROM CUSTOMER WHERE NAME LIKE 'A%'; (D)</p> Signup and view all the answers

    Which SQL query would display the NAME and BALANCE of Female CUSTOMERs with a TRANSACTION Date in 2019?

    <p>SELECT NAME, BALANCE FROM CUSTOMER WHERE GENDER = 'F' AND ACNO IN (SELECT ACNO FROM TRANSACTION WHERE YEAR(TDATE) = 2019); (D)</p> Signup and view all the answers

    Which SQL statement returns the total number of CUSTOMERs for each GENDER?

    <p>SELECT GENDER, COUNT(*) FROM CUSTOMER GROUP BY GENDER; (B)</p> Signup and view all the answers

    Which SQL query sorts CUSTOMER NAME and BALANCE in ascending order of GENDER?

    <p>SELECT NAME, BALANCE FROM CUSTOMER ORDER BY GENDER ASC; (C)</p> Signup and view all the answers

    What is the correct SQL statement to display CUSTOMER NAME and their respective INTEREST, calculated as 8% of BALANCE?

    <p>SELECT NAME, BALANCE * 0.08 AS INTEREST FROM CUSTOMER; (C)</p> Signup and view all the answers

    Which Python function correctly writes records to the binary file 'PLANTS.dat'?

    <p>def WRITEREC(): with open('PLANTS.dat', 'wb') as file: ; (B)</p> Signup and view all the answers

    Which Python function definition accurately displays records from 'PLANTS.dat' where PRICE is more than 500?

    <p>def SHOWHIGH(): with open('PLANTS.dat', 'rb') as file: ; (B)</p> Signup and view all the answers

    What would be the purpose of the function countrec() when applied to 'PATIENTS.dat'?

    <p>To display patient details with a specific DISEASE 'COVID-19' and count them. (C)</p> Signup and view all the answers

    What is the primary function of a web server?

    <p>To process user requests and deliver web pages. (D)</p> Signup and view all the answers

    In the context of function parameters, what differentiates actual parameters from formal parameters?

    <p>Formal parameters are specified in the function definition and actual parameters are the values or variables passed during a function call. (D)</p> Signup and view all the answers

    What role does the 'global' keyword serve in Python programming?

    <p>It allows the modification of global variables within a function scope. (C)</p> Signup and view all the answers

    Which of the following is a popular web browser?

    <p>Google Chrome (C)</p> Signup and view all the answers

    When a function is defined in Python as 'def area(side):', what does 'side' represent?

    <p>A formal parameter used in the function definition. (D)</p> Signup and view all the answers

    Flashcards

    SQL query for CUSTOMERs with names starting with 'A'

    SELECT * FROM CUSTOMER WHERE NAME LIKE 'A%';

    SQL query for female customers with transactions in 2019

    SELECT NAME, BALANCE FROM CUSTOMER WHERE GENDER = 'F' AND ACNO IN (SELECT ACNO FROM TRANSACTION WHERE STRFTIME('%Y',TDATE) = '2019');

    SQL query for counting customers by gender

    SELECT GENDER, COUNT(*) AS CUSTOMER_COUNT FROM CUSTOMER GROUP BY GENDER;

    SQL query for customers ordered by gender

    SELECT NAME, BALANCE, GENDER FROM CUSTOMER ORDER BY GENDER;

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    SQL query to calculate interest for all customers

    SELECT NAME, BALANCE, BALANCE * 0.08 AS INTEREST FROM CUSTOMER;

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    Python function to write records to a binary file (PLANTS.dat)

    A function that takes input for ID, NAME, and PRICE, and writes them to a binary file.

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    Python function to show high-priced plants

    Reads a binary file, extracts PRICE, and displays data exceeding 500.

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    Python function to count patients with COVID-19

    Reads a binary file, counts patients with the disease 'COVID-19'.

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    Domain Name

    A text-based identifier that represents a specific website or internet resource.

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    URL

    A specific address used to locate a particular webpage or resource on the internet.

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    PPP

    Point-to-Point Protocol; a communication protocol used to establish a connection between two network devices.

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    VoIP

    Voice over Internet Protocol; a technology that transmits voice communications over the internet.

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    GSM

    Global System for Mobile communications; a globally-recognized standard for mobile phones

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    WLL

    Wireless Local Loop; a wireless connection used for telecom services.

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    Positional Parameter (Python)

    Function parameters where the order of arguments in the function call directly corresponds to the order of parameters in the function definition.

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    Default Parameter (Python)

    Function parameters that take default values if no argument is provided during the function call.

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    Reading a file in Python

    Using Python to open a text file, read its contents, and process the data.

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    Text file processing

    Manipulating text data within a file, modifying words or lines.

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    Counting lines (Python)

    Determining the number of lines in a text file using a function.

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    Function 'open' for files

    A function used in Python to access the content of a text file.

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    File reading method in Python

    Different approaches for obtaining data within a text file.

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    Python change function output

    The Python function change calculates the sum of elements in a list with even indexes until the middle. For the list B=[10,11,12,30,32,34,35,38,40,2], the output, after fixing the typos, should be 190.

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    SQL PRIMARY KEY constraint

    Uniquely identifies each row/record in a database table; ensures no duplicate primary key values.

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    SQL UNIQUE constraint

    Ensures that all values in a specific column are unique.

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    SQL NOT NULL constraint

    Ensures that a column cannot have a NULL value; all rows must have a value in that column.

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    Python Sum3 function

    A Python function that takes a list of integers (L) and returns the sum of integers ending with the digit 3.

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    SQL DEFAULT Constraint

    Specifies a default value for a column, used when no value is provided when inserting a new row.

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    SQL CHECK constraint

    Ensures that all values in a column satisfy specific criteria or conditions.

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    Error in Python code (change)

    The provided Python code may produce a NameError if the function Change is not correctly defined.

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    Reading 'PLANTS.DAT' file

    The code opens a binary file named 'PLANTS.DAT' to read and load data using the pickle library. It then iterates through each record (likely a plant's attributes) in the loaded data.

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    Adding plant data

    The code takes user input and stores it as a plant record in the 'PLANTS.DAT' binary file, using the pickle module.

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    Filtering plant records

    The code reads data from the 'PLANTS.DAT' file. It selects records where the plant's price is above 500 and displays the records.

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    Reading 'PATIENTS.dat' (binary)

    The code reads data from a binary file named 'PATIENTS.dat'. The file likely contains records with patient data, including ID, name, and disease.

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    Displaying COVID-19 patients

    The function reads the 'PATIENTS.dat' file, identifies patients diagnosed with 'COVID-19', and displays their details, along with the total count of such patients.

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    What is a web server?

    A web server is a computer that stores, processes, and delivers web pages to users. It's like a librarian for the internet, holding all the information needed to build websites.

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    What is HTTP?

    Hypertext Transfer Protocol (HTTP) is the language used for communication between web browsers (like Chrome or Firefox) and web servers.

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    Formal vs. Actual Parameters

    Formal parameters are placeholders in a function definition, representing the data the function will work with. Actual parameters are the specific values or variables provided when a function is called.

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    What is a global variable?

    A global variable is accessible from anywhere in the program, unlike local variables which are confined to specific functions.

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    What does the 'global' keyword do?

    The 'global' keyword allows you to modify a global variable inside a function. It acts like a permission slip, granting access to change a variable outside its local scope.

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