Interview questions for developer

1. What is Name spacing in JavaScript?

It is usually not a good practice to use global variables in programming languages including JavaScript. However, you may have to use global variables sometimes. So, JavaScript introduces the concept of namespacing which ties down a part of the code and registers it with a unique name.
The namespace is nothing more than a container name where we hold classes, functions, and variables that can be repeated with the same name in other namespaces or namespace without involving an error.

2. What projects are you currently working on?

Since you’re applying for an entry-level job, the projects you list can be side projects. The interviewer wants to know that you’re actively coding, along with what type of technologies you use, and if you’re passionate about the work.

3. Why should we hire you for this position?

To answer this question, you’ll want to know about the company you’re applying to. You don’t want to be overconfident and respond with a generic answer like, “Because I’m smart, motivated, and want this job.” Instead, use your knowledge of the company to highlight how you can contribute to their goals.

4. How can you reduce page loading time?

These are the following ways you can reduce web page loading time –
• Reduce the image size
• Use the latest generation formats for images
• Minify HTML, CSS, and Javascript
• Postpone uploading off-screen images
• Create Accelerated Mobile Pages ( AMPs)
• Remove unnecessary widgets
• Avoid multiple redirects
• Place CSS at the top and script referencing at the bottom or external files
• Reduce lookups
• Minimize redirects and caching
• Check the current speed of the website
• Finding a good hosting to host your website
• Clean the web code

5. Where do you see yourself in five years?

This question helps the interviewer determine if you’ll stick around for a while and if your goals match what the company can provide. Answer this question as honestly as possible.
First, you need to know what your long-term goals are. Then, find a connection between those goals and the job description. If the company has different levels of Software Developers, you might say that you want to work toward a mid or senior-level position.

6. What is CORS? Why is it important?

Ans. This is an important web development interview question.
Cross-Origin Resource Sharing (CORS) is a browser mechanism that allows controlled access to resources located outside of a given domain. It enables a web page from one domain to access a resource with a different domain (a cross-domain request). It is a relaxation of the same-origin policy implemented in modern browsers.
Due to the same-origin policy followed by XMLHttpRequest and fetch, JavaScript can only make calls to URLs that live on the same origin as the location where the script is running. Without features like CORS, websites are restricted to accessing resources from the same origin through the same-origin policy.
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7. What are the advantages of HTTP 2.0 over HTTP 1.1?

The major advantages of HTTP 2.0 over HTTP 1.1 include –
• Higher loading speed
• Improvement of web positioning
• Automatic prioritization
• Less broadband consumption
• Immediate presentation

7. How do you take into account SEO, maintainability, UX, performance and security when you’re building a web application?

Explain how you prioritize your actions as per the requirements of the organization. If your organization handles vital data, then security will be your top priority. If it is a medium-sized online business, SEO and UX might be your top priority, and so on.

8. What are the new form elements introduced in HTML5?

The new form elements introduced in HTML5 are:
• <datalist> – specifies a list of options for input controls
• <keygen> – generates an encryption key
• <output> – defines the result of an expression
• <progress> – heads only in the direction of 100% of the max value
• <meter> – provides for a gauge, displaying a general value within

9. What type of development are you currently working on?

When hiring managers ask this, they want to know that you understand your contribution to a company. When you answer, explain the business reasoning for your everyday work as a developer.
Example: “I’m currently a developer for an e-commerce company. I build applications that help the company process customer orders and track payment and other customer information.”

10. What tools do you use to keep track of project requirements?

Hiring managers ask this to determine how you stay organized at work and how strong your time management skills are. When you answer, tell them the specific software or tools you use to stay on top of your projects.
Example: “I typically use an online spreadsheet to track not only project requirements but also their deadlines. This lets me view the requirements no matter my location and in an organized format. It also lets me share the document with other members of my team so everyone understands the project’s requirements and deadlines.”

11. What programming languages are you familiar with?

When hiring managers ask this, they’re trying to determine if your skills align with the job’s qualifications. While you need to let them know the programming languages you have experience with, it’s also important to show you’re willing to learn additional languages to fit the needs of the job.
Example: “I have experience with JavaScript, Python and C++. I’m also learning Swift via an online class and I’m always open to learning new languages to expand my skill set. As a developer, I think it’s important to keep our skills up-to-date to contribute to our company’s success and advance in our career.”