List of top Informatics Practice Questions asked in CBSE CLASS XII

Every web page on the Internet has a unique address. This address is known as :
Assertion (A) : The drop() method in Pandas can be used to delete rows and columns from a DataFrame.
Reason (R) : The axis parameter in the drop() method specifies whether to delete rows (axis=0) or columns (axis=1).
Assertion (A) : The ROUND() function in SQL can be used to round off a number to a specified number of decimal places.
Reason (R) : The ROUND() function is a string function that accepts character values as input and returns numerical values as output.
Which of the following libraries defines an ndarray in Python ?
Which of the following Python statements is used to change a column label in a DataFrame, df ?
Which of the following Python statements will be used to select a specific element having index as points, from a Pandas Series named ser?
Which protocol is used while communicating through video calls on the Internet ?
Excessive screen time and poor posture can lead to :
Which SQL function calculates $a^b$ ?
Which of the following data structure is used for storing one-dimensional labelled data in Python Pandas ?
Priya received an email that appeared to be from her bank, asking her to update her account information by clicking on a link. She clicked the link to enter her details, but immediately after, some amount was debited from her account. What type of cybercrime did Priya fall victim to ?
In Python which function of matplotlib library is used to save a plot ?
What is the default index type for a Pandas Series if not explicitly specified ?
State whether the following statement is True or False :
The MOD() function in SQL returns the quotient of division operation between two numbers.
Raheem created a unique computer software and wants to protect his creation from being copied or used without his permission. He is considering to apply for legal protection. Which type of intellectual property protection should Raheem apply for, to safeguard his software ?
Which of the following is not an aggregate function in SQL ?
Temporary data files stored by websites in our computer can be used to track our online activities and also to personalize browsing experience. These files are known as:
What will be the output of the following SQL command?
SELECT MONTHNAME('2024-08-02');
State whether the following statement is True or False:
In Python, we cannot create an empty DataFrame.