284 interview questions for Tech support officier (2026)

Easy

16 votes535 runs0 comment

What does EVM stand for?

Blockchain Expert

ethereum

virtual machine

Anonymous authorat Nov 7, 2022

Easy

14 votes1679 runs0 comment

Is the following code valid? class Person { constructor(name, age) { this.name = name; this.age = age; } } const person = new Person('John', 20); console.log(person.name); console.log(person.age);

IT Architect

OOP

javascript

undefined

Eric Hostaleryat Dec 3, 2021

Hard

13 votes859 runs0 comment

Overrided method visibility must be the same or less restrictive than the inherited method.

IT Architect

OOP

visibility

inheritance

Anonymous authorat Mar 28, 2022

Easy

10 votes878 runs0 comment

Inheritance in OOP.

IT Architect

OOP

inheritance

methods

Anonymous authorat Mar 28, 2022

Easy

9 votes696 runs0 comment

You need to develop a class for which there should be only one instance throughout your application. Which design pattern should you use for this?

IT Architect

OOP

design pattern

singleton

Jean ALbin ELieat Mar 28, 2023

Hard

9 votes455 runs0 comment

How to enable Azure AD Authentication in a hosted Application

DevOps

azure

authentication

Anonymous authorat Feb 8, 2022

Medium

8 votes1558 runs0 comment

Can we extend an abstract class in Java?

IT Architect

OOP

abstract

class

Eric Hostaleryat Dec 3, 2021

Hard

7 votes1632 runs0 comment

Which design pattern allows to dynamically add responsibilities to an object?

IT Architect

OOP

design pattern

object

Eric Hostaleryat Sep 19, 2022

Hard

7 votes1185 runs1 comment

How to create a snapshot of a logical volume in Linux

DevOps

logical volume

snapshot

Kevin Lefevreat Nov 27, 2021

Easy

7 votes1149 runs0 comment

List running processes.

DevOps

linux

processes

Kevin Lefevreat Sep 19, 2022

Hard

7 votes1133 runs1 comment

Configure the /etc/resolv.conf file to use the following nameservers: 10.1.1.1, 10.2.2.2, 10.3.3.3.

DevOps

linux

resolver

Kevin Lefevreat Jan 2, 2024

Easy

7 votes857 runs0 comment

Can a class implements several interfaces ?

IT Architect

OOP

interfaces

inheritance

Anonymous authorat Mar 28, 2022

Easy

5 votes1545 runs0 comment

Is the following code valid? class Person { constructor(name, age) { this.name = name; this.age = age; } } const person = new Person('John', 20); console.log(person.name); console.log(person.age);

IT Architect

OOP

javascript

undefined

Eric Hostaleryat Dec 3, 2021

Easy

5 votes1545 runs

1 comment

Is the following code valid? class Person { constructor(name, age) { this.name = name; this.age = age; } } const person = new Person('John', 20); console.log(person.name); console.log(person.age);

IT Architect

OOP

undefined

Eric Hostaleryat Dec 3, 2021

Medium

5 votes1501 runs1 comment

Can an interface inherit from another interface?

IT Architect

OOP

interfaces

Vincent Cotroat Dec 3, 2021

Easy

5 votes1165 runs0 comment

Change file mode bits.

DevOps

chmod

file

Kevin Lefevreat Nov 27, 2021

Medium

5 votes826 runs1 comment

When can you do a+b in OOP ?

IT Architect

OOP

operator overloading

classes

Anonymous authorat Mar 28, 2022

Easy

4 votes1607 runs0 comment

Is the following code valid? class Person { constructor(name, age) { this.name = name; this.age = age; } } const person = new Person('John', 20); console.log(person.name); console.log(person.age);

IT Architect

OOP

javascript

undefined

Eric Hostaleryat Dec 3, 2021

Medium

4 votes1599 runs0 comment

Is the following code valid? class Person { constructor(name, age) { this.name = name; this.age = age; } } const person = new Person('John', 20); console.log(person.name); console.log(person.age);

IT Architect

OOP

javascript

undefined

Eric Hostaleryat Dec 3, 2021

Easy

4 votes1570 runs0 comment

Implement the interface IEmailFormatter for the classes Person, Company, and ListOfPerson, which has a method GetEmailContent()

IT Architect

OOP

interfaces

classes

Eric Hostaleryat Mar 13, 2023

284 interview questionsfor Tech support officier (2026)

Test your technical skills before an interview of Tech support officier with 284 corrected questions. Beginner, Intermediate or Expert level.

What does EVM stand for?

Is the following code valid? class Person { constructor(name, age) { this.name = name; this.age = age; } } const person = new Person('John', 20); console.log(person.name); console.log(person.age);

Overrided method visibility must be the same or less restrictive than the inherited method.

Inheritance in OOP.

You need to develop a class for which there should be only one instance throughout your application. Which design pattern should you use for this?

How to enable Azure AD Authentication in a hosted Application

Can we extend an abstract class in Java?

Which design pattern allows to dynamically add responsibilities to an object?

How to create a snapshot of a logical volume in Linux

List running processes.

Configure the /etc/resolv.conf file to use the following nameservers: 10.1.1.1, 10.2.2.2, 10.3.3.3.

Can a class implements several interfaces ?

Is the following code valid? class Person { constructor(name, age) { this.name = name; this.age = age; } } const person = new Person('John', 20); console.log(person.name); console.log(person.age);

Is the following code valid? class Person { constructor(name, age) { this.name = name; this.age = age; } } const person = new Person('John', 20); console.log(person.name); console.log(person.age);

Can an interface inherit from another interface?

Change file mode bits.

When can you do a+b in OOP ?

Is the following code valid? class Person { constructor(name, age) { this.name = name; this.age = age; } } const person = new Person('John', 20); console.log(person.name); console.log(person.age);

Is the following code valid? class Person { constructor(name, age) { this.name = name; this.age = age; } } const person = new Person('John', 20); console.log(person.name); console.log(person.age);

Implement the interface IEmailFormatter for the classes Person, Company, and ListOfPerson, which has a method GetEmailContent()