ExamAdept

What is the purpose of the len() function?

A:

To calculate the logarithm

B:

To find the length of a string or list

C:

To generate random numbers

D:

To perform mathematical operations

Answer: B

The len() function is used to determine the number of elements in a string, list, or any other iterable object.

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Which of the following is a valid Python string?

A:

'Hello, World!"

B:

"Hello, World!'

C:

'Hello, World!'

D:

None of these

Answer: C

Both single and double quotes are valid for creating strings, but they must be matched properly.

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What is the correct way to comment a single-line?

A:

// This is a comment

B:

/* This is a comment */

C:

# This is a comment

D:

-- This is a comment

Answer: C

In Python, single-line comments are made using the '#' symbol.

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What is the correct way to declare a variable?

A:

var x = 5

B:

int x = 5

C:

x = 5

D:

variable x = 5

Answer: C

In Python, variables can be declared simply by assigning a value to them. No explicit type declaration is needed.

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Which of the following data types is used to represent a sequence of Unicode characters that cannot be modified?

A:

int

B:

float

C:

str

D:

bytes

Answer: C

The str data type is used to represent a sequence of Unicode characters that cannot be modified. It is immutable.

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Questions for: Data Types