Python Most Frequently Asked Questions for interview and viva

Interview Questions for Python

Question : 1

What is the difference between a keyword and an identifier?

Question : 2

What are literals in Python? How many types of Literals allowed in Python?

Question : 3

How many types of sequences are supported in Python?

Question : 4

What factors guide the choice of identifiers in program?

Question : 5

What is the difference between an expression and a statement in Python?

Question : 6

What are tokens in Python? How many types of tokens allowed in Python?

Question : 7

What is the role of indentation in Python?

Question : 8

What are data types? What are Python built in core data types?

Question : 9

Which data types of Python handle Numbers?

Question : 10

What do you understand by term immutable?

Question : 11

What are mutable and immutable types in Python? List both of them.

Question : 12

What are augmented assignment operators? How are they useful?

Question : 13

Why are logical errors harder to locate?

Question : 14

What is an Exception?

Question : 15

Why is Exception Handling is required?

Question : 16

What is the need for debugger tool?

Question : 17

What are main error types? Which types are most dangerous and why?

Question : 18

What is a difference between an error and exception?

Question : 19

What is debugging and code tracing?

Question : 20

What are nested Lists?

Question : 21

Discuss the utility and significance of Lists.

Question : 22

What is the purpose of the del operator and pop method? Try deleting a slice.

Question : 23

What are list slices?

Question : 24

What do you understand by true copy of a list? How is it different from shallow copy?

Question : 25

What do you understand by immutability?

Question : 26

How are Tuples different from Lists when both are sequences?

Question : 27

Discuss the utility and significance of Tuples.

Question : 28

How can you say that a tuple is an ordered list of objects?

Question : 29

How are dictionaries different from Lists?

Question : 30

When are dictionaries more useful than lists?

Question : 31

Discuss the utility and significance of Dictionaries.

Question : 32

Why is a dictionary termed as an unordered collection of objects?

Question : 33

How is clear() function different from del Statement?

Question : 34

What is the significance of modules?

Question : 35

What is dot notation of referring to objects inside a module?

Question : 36

What is a function? How is it useful?

Question : 37

What is Pandas library of Python? What is its significance?

Question : 38

How is Series data structure different from a DataFrame data structure?

Question : 39

What is a DataFrame object? How it is created in Python?

Question : 40

What are advantages of CSV file formats?

Question : 41

What is sqlite3 library of Python?

Question : 42

Can nongraphic characters be used in Python ? How ? Give examples to support your answer.

Question : 43

What is a cross-platform software?

Question : 44

What are the advantages of Python programming language?

Question : 45

What are some limitations of Python programming language?

Question : 46

In how many different ways, can you work in Python?

Question : 47

What are advantages/disadvantages of working in Interactive mode in Python?

Question : 48

What are the advantages/disadvantages of working in script mode in Python?

Question : 49

How are keywords different from identifiers ?

Question : 50

How are floating constants represented in Python ? Give examples to support your answer.

Question : 51

How are string-literals represented and implemented in Python ?

Question : 52

What are operators ? What is their function ? Give examples of some unary and binary operators.

Question : 53

What is an expression and a statement ?

Question : 54

What all components can a Python program contain ?

Question : 55

What do you understand by block/code block/suite in Python ?

Question : 56

What are variables ? How are they important for a program ?

Question : 57

What do you understand by undefined variable in Python ?

Question : 58

What is Dynamic Typing feature of Python ?

Question : 59

What is the common structure of Python compound statements?

Question : 60

What is the importance of the three programming constructs?

Question : 61

What is empty statement in Python? What is its need?

Question : 62

Which Python statement can be termed as empty statement?

Question : 63

What is an algorithm?

Question : 64

What is a flowchart? How is it useful?

Question : 65

What is entry-controlled loop?

Question : 66

What are the four elements of a while loop in Python?

Question : 67

What is the difference between else clause of if-else and else clause of Python loops?

Question : 68

In which cases, the else clause of a loop does not get executed?

Question : 69

What are jump statements? Name them.

Question : 70

How and when are named conditions useful?

Question : 71

What are endless loops ? Why do such loops occur?

Question : 72

How is break statement different from continue?

Question : 73

Define Operator and Operand.

Question : 74

What is the use of type()?

Question : 75

The modulus operator is used to produce the quotient in division. Is it True or False ?

Question : 76

Describe the use parentheses in expressions.

Question : 77

Describe how Python evaluates an expression containing parentheses.

Question : 78

Explain the use of the assignment operator.

Question : 79

What is the difference between Expressions and Operators?

Question : 80

Example not (boolean Not) with an example.

Question : 81

Example not (boolean Not) with an example.

Question : 82

Example and (boolean AND) with example.

Question : 83

Example or (boolean OR) with example.

Question : 84

Explain Associativity of operators wit6h example.

Question : 85

What is the difference between * and **? Explain with an example.

Question : 86

What is the difference between << (left shift) and >> (right shift) operators ?

Question : 87

What is the difference between & (bit-wise AND), and I (bit-wise OR) operators?

Question : 88

Explain not ( boolean NOT ) with an example

Question : 89

What is an expression ?

Question : 90

What is a statement ?

Question : 91

What do you mean by floor division ?

Question : 92

What is the difference between "=" and "==" ?

Question : 93

What don you mean by precedence and associativity of operators ?

Question : 94

What are Identity and Membership operators ?

Question : 95

Explain different bitwise operators.

Question : 96

What will be the result of 5.0/3 and 5.0 / / 3 ?

Question : 97

What is the difference between + and * operators of List ?

Question : 98

What is boolean data type ? Explain with an example.

Question : 99

What is the difference between pow() and**?

Question : 100

What is the deference between expression and statement ?

Question : 101

What is the difference between num = 20 and num == 20?

Question : 102

What is conditional branching ?

Question : 103

What is looping ?

Question : 104

Explain if statement.

Question : 105

Explain range() function ?

Question : 106

Mention the similarity and difference between break and continue statements.

Question : 107

What is the function of break statement in a while or for loop ?

Question : 108

What is the use of Control structures ?

Question : 109

How many types of control structures are there ? Explain.

Question : 110

Explain Selection logic.

Question : 111

What do you mean by flow-of-control ?

Question : 112

What do you mean by selection statements ?

Question : 113

What is the minimum number of iteration that while loop could make ?

Question : 114

What is the difference between entry controlled loop and exit-controlled loop?

Question : 115

What are jump statements ?

Question : 116

What is Iteration ?

Question : 117

What are strings ?

Question : 118

Differentiate between physical line and logical line.

Question : 119

What is the difference between (+) and (*) operators?

Question : 120

What is the difference between Istrip() and rstrip() ?

Question : 121

What do you mean by' strings are immutable ?

Question : 122

What is the function of slicing operation ?

Question : 123

What is the use of Docstrings ?

Question : 124

How are empty strings represented in Python ?

Question : 125

"The quotes are not a part of strings". Comment.

Question : 126

Differentiate between ord() and chr() functions.

Question : 127

Write short note on subscript.

Question : 128

What do you mean by positive and negative indices ?

Question : 129

'String indices must be an integer'. Comment.

Question : 130

What do you mean by traversing a string ?

Question : 131

Write short note on membership operators.

Question : 132

What is the significance of list ?

Question : 133

Lists are mutable. Comments ?

Question : 134

Why are Python Lists called dynamic arrays ?

Question : 135

How do list indices work in Python ?

Question : 136

Explain count() method with example.

Question : 137

What is index() method used for ?

Question : 138

What is aliasing ? Explain with an example.

Question : 139

What do you mean by sequence ?

Question : 140

What is indexing ?

Question : 141

What is the default value for the first index if you omit the first index value in a slice ?

Question : 142

What is the default value for the second index if you omit the second index value in a slice?

Question : 143

What is the purpose of negative slice indices ?

Question : 144

Explain the functions of del statement, pop() and remove().

Question : 145

If two list are equivalent, is it necessary that they are identical also. Explain with an example.

Question : 146

Name three types of sequence objects.

Question : 147

Which item in the sequence is selected for an index value of - 1?

Question : 148

Just like C, C++, and Java, Python supports character type; True or False ?

Question : 149

How are lists formed ?

Question : 150

What are the characteristics of list ?

Question : 151

What is tuple ?

Question : 152

A tuple in Python is immutable. Comment.

Question : 153

What is the difference between objects and methods ?

Question : 154

Is an item assignment an a tuple possible ?

Question : 155

What is len() function used for in list and tuple?

Question : 156

What is the use of in operator ?

Question : 157

Write short note on tuple assignment.

Question : 158

How will you create tuple with zero element and 1 element ?

Question : 159

Compare and contrast tuples and list.

Question : 160

Can we update tuples?

Question : 161

What is the difference between list and tuple ?

Question : 162

Identity the following as mutable or immutable:
lists, numbers, strings, tuples and dictionaries.

Question : 163

How will you create an empty tuple ?

Question : 164

What is dictionary?

Question : 165

Compare and contrast dictionaries (dicts) with other Python data types.

Question : 166

What are the advantages of hash ?

Question : 167

Does Python store dictionary elements in any particular order?

Question : 168

What is a mapping ?

Question : 169

What is another name for mapping ?

Question : 170

What are the characteristics of a Python dictionary?

Question : 171

A dictionary is an mutable object. Comment.

Question : 172

A dictionary is an unordered collection of objects. Comment.

Question : 173

Can sequence operations, such as slicing and concatenation, be applied to dictionaries?

Question : 174

Write the syntax of a dictionary.

Question : 175

Can you remove key:value pairs from a dictionary. If so, how ?

Question : 176

What do you mean by traversing a dictionary ?

Question : 177

Can you merge two dictionaries ? If so, how?

Question : 178

Discuss the properties of Dictionary Keys.

Question : 179

What do the keys(), values() and items() functions do ?

Question : 180

Write different capabilities of dictionary.

Question : 181

Write difference between lists and dictionaries.

Question : 182

What is the purpose of a header file in a Python program?

Question : 183

What is function ?

Question : 184

What are the advantages of using functions.

Question : 185

What is function definition ?

Question : 186

Write a short note on built-in function.

Question : 187

How is built-in function accessed ?

Question : 188

How will you import all functions in the math module ?

Question : 189

What is difference between cell() and floor() functions?

Question : 190

What is Python module ?

Question : 191

How will you import specific names only within a module?

Question : 192

Write short note on user defined function.

Question : 193

What is difference between pow() and **?

Question : 194

What do you mean by Regular expressions ?

Question : 195

What is a metacharacter?

Question : 196

How match() function is different from search() function ?

Question : 197

What do you mean by greedy match and non greedy match ?

Question : 198

Differentiate between max() and min() functions ?

Question : 199

Write a short note on random module.

Question : 200

Write a short note on randint().

Question : 201

Observe the following Python function and write the name(s) of the module(s) to which they belong:
a. uniform() b. findall()

Question : 202

What is file Pointer ?

Question : 203

Discuss various modes to open a file.

Question : 204

Write short note on binary mode of opening a file.

Question : 205

Differentiate between read() and readline().

Question : 206

Write function of a+ mode.

Question : 207

What are different ways to read from a file ?

Question : 208

What are command line arguments?

Question : 209

Why do we use command line arguments ?

Question : 210

What is the use of getopt method ?

Question : 211

What are the different file processing modes supported by Python ?

Question : 212

What is pickling and unpickling in Python ?

Question : 213

What is the use of offset ?

Question : 214

Write a statement in Python to open a text file DATA.TXT so that new contents can be written in it.

Question : 215

Differentiate between readlines() and readline() functions.

Question : 216

Name two functions which allow us to access a file in a non-sequential or random mode.

Question : 217

Name the file which is stored in human readable form and can also be created using any text editor.

Question : 218

What is the use of seek() and tell() methods?

Question : 219

What is the use of close() method ?

Question : 220

What do you understand by module and package ?

Question : 221

What do you mean by LEGB ?

Question : 222

What is namespace in Python ?

Question : 223

Name any two commonly used build-in modules.

Question : 224

What do you mean by Global variable ?

Question : 225

What do you mean by Built-in ?

Question : 226

What do you understand by following import statement :
from x import a, b, c

Question : 227

What do you mean by reloading module ?

Question : 228

How will you import all the attributes from a module ?

Question : 229

Write short note on from-import statement.

Question : 230

What is numpy ?

Question : 231

Name the module you will import to use numpy ?

Question : 232

What is slicing ?

Question : 233

What do you mean by Axes in numpy ?

Question : 234

What do you mean by Rank in numpy ?

Question : 235

Write short note on slicing.

Question : 236

What is the purpose of negative index values in NumPy ?

Question : 237

Define Array and NumPy array.

Question : 238

Explain membership operator in with example.