Madanswer Technologies Interview Questions Data|Agile|DevOPs|Python - Recent questions in Django

To limit a queryset result to return objects from 4th through 8th object, use ________.

Wed, 29 Jun 2022 03:01:50 +0000

To limit a queryset result to return objects from 4th through 8th object, use ________.

select the correct answer from below options

a) Mymodel.objects.all()[4:8]

b) Mymodel.objects.all()[:8]

c) Mymodel.objects.all()[3:8]

d) Mymodel.objects.all()[4:]

Name the comparison and conversion database functions.

Wed, 29 Jun 2022 03:01:07 +0000

Name the comparison and conversion database functions.

select the correct answer from below options

a) Least

b) Greatest

c) Cast

d) Coalesce

Which applies the changes till savepoint to the transaction and releases the SID?

Wed, 29 Jun 2022 03:00:38 +0000

Which applies the changes till savepoint to the transaction and releases the SID?

select the correct answer from below options

a) savepoint_commit(sid, using=None)

b) savepoint_rollback(sid, using=None)

c) savepoint(using=None)

d) None of the options

Which is not a python ORM implementation?

Wed, 29 Jun 2022 03:00:13 +0000

Which is not a python ORM implementation?

select the correct answer from below options

a) Storm

b) SQLAlchemy

c) PonyORM

d) hibernate

What is the act of reducing a set of migrations to one or few?

Wed, 29 Jun 2022 02:59:45 +0000

What is the act of reducing a set of migrations to one or few?

select the correct answer from below options

a) optimize

b) Squashing

c) reduce

d) None of the options

Identify the incorrect option: Method that returns a new queryset.

Wed, 29 Jun 2022 02:58:42 +0000

Identify the incorrect option: Method that returns a new queryset.

select the correct answer from below options

a) earliest()

b) union()

c) raw()

d) none()

The ‘OR’ condition in queryset is possible because of using _____.

Wed, 29 Jun 2022 02:58:06 +0000

The ‘OR’ condition in queryset is possible because of using _____.

select the correct answer from below options

a) F() object

b) Q object AND F object

c) Q() object

d) None of the options

Identify the incorrect field lookup option.

Wed, 29 Jun 2022 02:57:28 +0000

Identify the incorrect field lookup option.

select the correct answer from below options

a) regex

b) exact

c) lte

d) month

Connection and cursor mostly implement the standard Python DB-API.

Wed, 29 Jun 2022 02:56:56 +0000

Connection and cursor mostly implement the standard Python DB-API.

select the correct answer from below options

a) True

b) False

Manager.raw() supports indexing.

Wed, 29 Jun 2022 02:56:31 +0000

Manager.raw() supports indexing.

select the correct answer from below options

a) True

b) False

Migrations usually Create the required scripts to change the structure by updating the code and changing your models.

Wed, 29 Jun 2022 02:55:41 +0000

Migrations usually Create the required scripts to change the structure by updating the code and changing your models.

select the correct answer from below options

a) True

b) False

What do you call a migration that creates the first version of the app’s tables?

Wed, 29 Jun 2022 02:55:16 +0000

What do you call a migration that creates the first version of the app’s tables?

select the correct answer from below options

a) start migration

b) default migration

c) initial migration

d) first migration

Django helps to tackle ________.

Wed, 29 Jun 2022 02:54:48 +0000

Django helps to tackle ________.

select the correct answer from below options

a) Cross-site scripting

b) cross-site request forgery and clickjacking

c) SQL injection

d) All the options

Identify the incorrect option: Method that does not return a new queryset.

Wed, 29 Jun 2022 02:54:17 +0000

Identify the incorrect option: Method that does not return a new queryset.

select the correct answer from below options

a) difference()

b) exists()

c) first()

d) delete()

Which is not an aggregation function?

Wed, 29 Jun 2022 02:53:47 +0000

Which is not an aggregation function?

select the correct answer from below options

a) variance

b) sum

c) filter

d) range

Name the incorrect field option.

Wed, 29 Jun 2022 02:53:15 +0000

Name the incorrect field option.

select the correct answer from below options

a) blank

b) null

c) choices

d) None of the options

What represents the logic layer of the program?

Wed, 29 Jun 2022 02:52:49 +0000

What represents the logic layer of the program?

select the correct answer from below options

a) VIEWS

b) TEMPLATES

c) MODELS

d) CONTROLLERS

Select the incorrect statement: A database Router uses the method ________.

Wed, 29 Jun 2022 02:45:35 +0000

Select the incorrect statement: A database Router uses the method ________.

select the correct answer from below options

a) allow_migrate(db, app_label, model_name=None, **hints)

b) db_for_delete(model, **hints)

c) allow_relation(obj1, obj2, **hints)

d) db_for_write(model, **hints)

What exception is raised, if the primary key is excluded from a Raw query?

Wed, 29 Jun 2022 02:45:05 +0000

What exception is raised, if the primary key is excluded from a Raw query?

select the correct answer from below options

a) InvalidField exception

b) InvalidAttribute exception

c) InvalidQuery exception

d) InvalidObject exception

The integrity of Django ORM operations involving multiple queries can be achieved through savepoints.

Wed, 29 Jun 2022 02:44:35 +0000

The integrity of Django ORM operations involving multiple queries can be achieved through savepoints.

select the correct answer from below options

a) True

b) False

Schema Migrations-run custom SQL using RunSQL or python code blocks using RunPython.

Wed, 29 Jun 2022 02:44:10 +0000

Schema Migrations-run custom SQL using RunSQL or python code blocks using RunPython.

select the correct answer from below options

a) True

b) False

Select the incorrect statement: Database Transaction ________.

Wed, 29 Jun 2022 02:43:40 +0000

Select the incorrect statement: Database Transaction ________.

select the correct answer from below options

a) is started by enabling autocommit using set_autocommit()

b) use commit() to apply the changes

c) is an atomic set of database queries which applies either all or no changes to the data

d) use rollback() to cancel the changes

How to make a migration run outside transaction in a DDL based transaction in Django migration?

Wed, 29 Jun 2022 02:42:48 +0000

How to make a migration run outside transaction in a DDL based transaction?

select the correct answer from below options

a) class Migration(migrations.Migration):

  atomic = False

b) class Migration(migrations.Migration):

  atomic = True

c) class Migration(migrations):

  atomic = False

d) class Migration(migrations):

  atomic = True

How to make a migration run outside transaction in a DDL based transaction?

Wed, 29 Jun 2022 02:42:04 +0000

How to make a migration run outside transaction in a DDL based transaction?

select the correct answer from below options

a) database files

b) migration files

c) database objects

d) text files

Select the incorrect statement: Migration Operations ________.

Wed, 29 Jun 2022 02:41:23 +0000

Select the incorrect statement: Migration Operations ________.

select the correct answer from below options

a) records history of model changes

b) runs through models without touching database

c) migrations aren’t automatically done based on history of model changes

d) helps to load models to memory

exclude(**kwargs) – Returns QuerySet containing objects matching given lookup parameters.

Wed, 29 Jun 2022 02:40:51 +0000

exclude(**kwargs) – Returns QuerySet containing objects matching given lookup parameters.

select the correct answer from below options

a) True

b) False

Table names in databases are created by default with app_classname.

Wed, 29 Jun 2022 02:40:25 +0000

Table names in databases are created by default with app_classname.

select the correct answer from below options

a) True

b) False

Data migrations _________.

Wed, 29 Jun 2022 02:40:01 +0000

Data migrations _________.

select the correct answer from below options

a) alter data

b) use RunPython operation that takes a callable as argument

c) custom written unlike schema migrations

d) all the options

Django is loaded with a database-abstraction API to ______.

Wed, 29 Jun 2022 02:39:34 +0000

Django is loaded with a database-abstraction API to ______.

select the correct answer from below options

a) update and delete objects

b) create objects

c) retrieve objects

d) all the options

Select the incorrect statement: QuerySet API are classified as _________.

Wed, 29 Jun 2022 02:39:02 +0000

Select the incorrect statement: QuerySet API are classified as _________.

select the correct answer from below options

a) Methods that return new QuerySets

b) Field Lookups

c) Methods that do not return QuerySets

d) Methods that return new querysets’ AND ‘field lookups’ AND ‘aggregation functions’

e) Aggregation funcions

f) all the options

Select the incorrect statement about A QuerySet.

Wed, 29 Jun 2022 02:38:37 +0000

Select the incorrect statement about A QuerySet.

select the correct answer from below options

a) Can have filters to obtain different query results

b) Is a collection of database objects

c) Incomparable to a database select operation

d) Can be operated on a model

When an object is saved, Django _____________.

Wed, 29 Jun 2022 02:38:12 +0000

When an object is saved, Django _____________.

select the correct answer from below options

a) emits a pre save signal

b) emit a post save signal

c) prepares data for the database

d) preprocesses the data

e) inserts data into database

f) all the options

What can be used to validate all unique constraints on the model instead of individual field values?

Wed, 29 Jun 2022 02:37:45 +0000

What can be used to validate all unique constraints on the model instead of individual field values?

select the correct answer from below options

a) Model.clean()

b) Model.clean_fields(exclude=None)

c) Model.full_clean()

d) Model.validate_unique(exclude=None)

What can be used to validate all model fields, if any field is to be exempted from validation? Provide it in the exclude parameter.

Wed, 29 Jun 2022 02:37:13 +0000

What can be used to validate all model fields, if any field is to be exempted from validation? Provide it in the exclude parameter.

select the correct answer from below options

a) Model.clean()

b) Model.clean_fields(exclude=None)

c) Model.full_clean()

d) Model.validate_unique(exclude=None)

What can be used to provide custom model validation and to modify attributes on the model like changing the value on a field upon a conditional check?

Wed, 29 Jun 2022 02:36:41 +0000

What can be used to provide custom model validation and to modify attributes on the model like changing the value on a field upon a conditional check?

select the correct answer from below options

a) Model.full_clean()

b) Model.clean()

c) Model.validate_unique(exclude=None)

d) Model.clean_fields(exclude=None)

What exception is an attribute of each model class?

Tue, 28 Jun 2022 02:49:19 +0000

What exception is an attribute of each model class?

a) ClassDoesnotExist

b) AttributeDoesnotExist

c) ObjectDoesnotExist

d) DoesnotExist

When choosing field names for the model, it should not conflict with the model API. The field name should not be _________.

Tue, 28 Jun 2022 02:48:52 +0000

When choosing field names for the model, it should not conflict with the model API. The field name should not be _________.

a) clean

b) clean, save and delete

c) save and delete

d) delete

e) save

f) clean and save

A Django model is a Python class that subclasses _________.

Tue, 28 Jun 2022 02:48:17 +0000

A Django model is a Python class that subclasses _________.

a) djangodb.models.Model

b) django.db.model.Models

c) djangodb.model.Models

d) django.db.models.Model

To rename the Manager for a given class, what attribute type can be used in models.Manager() on that model?

Tue, 28 Jun 2022 02:47:55 +0000

To rename the Manager for a given class, what attribute type can be used in models.Manager() on that model?

a) objects

b) Customer

c) filter

d) class

What are the different ways of connecting multiple models relationship?

Tue, 28 Jun 2022 02:47:34 +0000

What are the different ways of connecting multiple models relationship?

a) One-to-one

b) Many-to-one

c) Many-to-many

d) All the options

id- is the auto assigned primary key by Django with the datatype.

Tue, 28 Jun 2022 02:47:02 +0000

id- is the auto assigned primary key by Django with the datatype.

a) models.FloatField()

b) models.TextField()

c) models.AutoField()

d) models.IntegerField()

What is/are applicable for Django ORM?

Tue, 28 Jun 2022 02:46:40 +0000

What is/are applicable for Django ORM?

a) Shifting complexity from the database into the application code

b) Potential for reduced performance

c) Impedance mismatch

d) All the options

Identify the ORM most used for Flask Web Framework.

Tue, 28 Jun 2022 02:46:16 +0000

Identify the ORM most used for Flask Web Framework.

a) peewee

b) SQLAlchemy

c) Hibernate

d) Django’s ORM

Object-relational Mapper (ORM) is a code library to automate the data transfer between _______.

Tue, 28 Jun 2022 02:45:54 +0000

Object-relational Mapper (ORM) is a code library to automate the data transfer between _______.

a) Databases and Objects

b) Objects and Arrays

c) Databases and Arrays

d) Relational DB and Objects

Select the incorrect statement: Django ORM.

Tue, 28 Jun 2022 02:45:30 +0000

Select the incorrect statement: Django ORM.

a) Auto generates primary keys

b) Efficient for simple and medium databases

c) Autocommit transactions

d) Supports SQLite only

Which setting can be used while adding a new Django app?

Tue, 28 Jun 2022 02:45:09 +0000

Which setting can be used while adding a new Django app?

a) DYNAMIC_APPS

b) ADD_APPS

c) INSTALLED_APPS

d) CREATE_APPS

Select the incorrect statement. in django

Tue, 28 Jun 2022 02:44:43 +0000

Select the incorrect statement.

a) A project can have multiple apps

b) A project can have a single application

c) One app can be in multiple projects

d) None of the options

Choose the correct option to create a project myworld using the Django-admin command.

Tue, 28 Jun 2022 02:44:14 +0000

Choose the correct option to create a project myworld using the Django-admin command.

a) $ django-admin createproject myworld

b) $ django-admin create myworld

c) $ django-admin startproject myworld

d) $ django-admin start myworld

A Django app will contain _____.

Tue, 28 Jun 2022 02:24:18 +0000

A Django app will contain _____.

a) views.py

b) tests.py

c) apps.py

d) models.py

e) All the options

Choose the correct option to create an app ‘myapp’.

Tue, 28 Jun 2022 02:23:50 +0000

Choose the correct option to create an app ‘myapp’.

a) python manage.py start myapp

b) python manage.py startproject myapp

c) python manage.py startapp myapp

d) python manage.py myapp