Lecture Session 3: Data Definition Structures in Python

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What is the primary purpose of assigning a variable name to a memory location?

To make it easier to access or modify the data (correct)
To declare the variable before use
To specify the data type
To restrict access to the memory location

Which of the following is NOT a restriction for naming variables in Python?

Variable names can contain special characters (correct)
Variable names must start with a capital letter
Variable names can only contain letters and numbers
Variable names cannot start with a number

What is the recommended practice for naming variables in Python?

Using capital letters to differentiate from reserved words
Using underscore to separate words in a variable name
Using numbers to make the variable name more unique
Using small letters to differentiate from reserved words and Constants (correct)

How can multiple values be assigned to multiple variables in Python?

Using the equal sign (=) with multiple values on the right-hand side (D) Signup and view all the answers

What is the purpose of the underscore in a variable name?

To separate two words used together in a variable name (B) Signup and view all the answers

Can variables in Python be declared without specifying their data type?

Yes, variables can be declared without specifying their data type (A) Signup and view all the answers

What is the order of evaluation when operators have the same priority in an expression?

From left to right in the order they appear (C) Signup and view all the answers

What is the purpose of using parentheses in an expression?

To change the order of operator precedence (C) Signup and view all the answers

What is the role of control structures in a programming language?

To direct the execution of a program (B) Signup and view all the answers

What happens when operators have different priorities in an expression?

The higher priority operators are evaluated first (B) Signup and view all the answers

What is the benefit of using parentheses when the operator precedence is not clear?

To avoid confusion (A) Signup and view all the answers

How do nested parentheses affect the evaluation of an expression?

The innermost parentheses are evaluated first (C) Signup and view all the answers

What is the purpose of string methods in Python?

To manipulate strings in various ways (B) Signup and view all the answers

What operator is used to concatenate strings in Python?

<ul> <li>(D)</li> </ul> Signup and view all the answers

What is the data type of the variable when a numeric value is assigned to it in Python?

It is automatically created by Python (A) Signup and view all the answers

What is the characteristic of integer numbers in Python?

They can be positive or negative without decimal points (B) Signup and view all the answers

What is the purpose of the int() function in Python?

To convert a string to an integer (A) Signup and view all the answers

What is the limitation of the length of integers in Python?

There is no limitation (B) Signup and view all the answers

What is the purpose of the hash symbol # in Python?

To create comments (D) Signup and view all the answers

What is the result of the operation 10 // 3 in Python?

3 (C) Signup and view all the answers

What is the primary reason why we cannot perform update functions on Tuples?

Because Tuples are immutable (D) Signup and view all the answers

What is the purpose of the update() method in Sets?

To add more than one item to a Set (A) Signup and view all the answers

What is the difference between int(x) and float(x) in Python?

int(x) converts to an integer, while float(x) converts to a float (A) Signup and view all the answers

What is the result of the operation 10 % 3 in Python?

1 (A) Signup and view all the answers

What is a characteristic of Dictionaries that distinguishes them from other data structures?

They do not allow duplicates and are unordered (C) Signup and view all the answers

What is the result of trying to access an item in a Set using an index?

You will get an error because Sets are unordered and unindexed (B) Signup and view all the answers

What is the purpose of the abs() function in Python?

To calculate the absolute value of a number (B) Signup and view all the answers

What is the difference between integers and real numbers in Python?

Integers are written as a sequence of digits, while real numbers are written in decimal form (C) Signup and view all the answers

What is the purpose of the len() method when used with a Tuple?

To check the length of a Tuple (C) Signup and view all the answers

What is the difference between the add() and update() methods in Sets?

The add() method adds a single item, while the update() method adds multiple items (D) Signup and view all the answers