State True or False: “A Python List must always contain all its elements of same data type.”

Write the output on execution of the following Python code:

def Change(X):
    for K, V in X.items():
        L1.append(K)
        L2.append(V)

D = {1: "ONE", 2: "TWO", 3: "THREE"}
L1 = []
L2 = []
Change(D)
print(L1)
print(L2)
print(D)

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A file PASSENGERS.DAT stores the records of passengers using the following structure:
PNR, PName, BRDSTN, DESTN, FARE

Where:
- PNR — Passenger Number (string type)
- PName — Passenger Name (string type)
- BRDSTN — Boarding Station Name (string type)
- DESTN — Destination Station Name (string type)
- FARE — Fare amount for the journey (float type)

Write user-defined functions in Python for the following tasks:

(i) Create() – to input data for passengers and write it in the binary file PASSENGERS.DAT.
(ii) SearchDestn(D) – to read contents from the file PASSENGERS.DAT and display the details of those Passengers whose DESTN matches with the value of D.
(iii) UpdateFare() – to increase the fare of all passengers by 5% and rewrite the updated records into the file PASSENGERS.DAT.

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A CSV file "P_record.csv" contains the records of patients in a hospital. Each record of the file contains the following data:
- Name of a patient
- Disease
- Number of days patient is admitted
- Amount

For example, a sample record of the file may be:
["Gunjan", "Jaundice", 4, 15000]

Write the following Python functions to perform the specified operations on this file:

(i) Write a function read_data() which reads all the data from the file and displays the details of all the 'Cancer' patients.

(ii) Write a function count_rec() which counts and returns the number of records in the file.

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Predict the output of the following code:

def ExamOn(mystr):
    newstr = ""
    count = 0
    for i in mystr:
        if count % 2 != 0:
            newstr = newstr + str(count - 1)
        else:
            newstr = newstr + i.lower()
        count += 1
    newstr = newstr + mystr[:2]
    print("The new string is:", newstr)

ExamOn("GenX")

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Write the following user-defined functions in Python:

(i) push_trail(N, myStack): Here N and myStack are lists, and myStack represents a stack.
The function should push the last 5 elements from the list N onto the stack myStack.
Assume that N contains at least 5 elements.

(ii) pop_one(myStack): The function should pop an element from the stack myStack, and return this element.
If the stack is empty, then the function should display the message 'Stack Underflow', and return None.

(iii) display_all(myStack): The function should display all the elements of the stack myStack, without deleting them.
If the stack is empty, the function should display the message 'Empty Stack'.

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State True or False: “A Python List must always contain all its elements of same data type.”

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Solution and Explanation

Top Questions on Programming in Python

Questions Asked in CBSE CLASS XII exam