Don't Let These 7 Critical Mistakes Ruin Your Technical Interview
Tags: interview, beginners, career, webdev
Published: 2024-02-01 15:15:00

As an ex-Google engineer who has conducted over 100 technical interviews, I've seen a fair share of common mistakes that both newcomers and veterans alike tend to make. These missteps not only jeopardize your chance of acing the interview but can also impact any professional interaction in general. The insights I'll share today are not just for interviews; they are life principles that could potentially steer your career and personal growth. Let’s dive in and ensure you shine in your next technical interview.

[Technical interviews](https://devinterview.io/) are tough. Typically consisting of five to six sessions, each lasting about 45 minutes, you must prove your worth in each to stand a chance. You need to understand that companies are cautious of false positives — preferring to pass up on a candidate than risk a bad hire. As such, a single mistake can significantly undermine your chances. Because in reality you will need a unanimous or near-unanimous approval from the interviewing panel to get hired.

What's interesting is the power dynamics within these panels. Rarely does any single interviewer have the final say. Instead, it takes a collective nod to green-light a hire. In contrast, a single negative assessment can be detrimental, illustrating the high stakes of each session.

## Mistake 1: Overconfidence and Undervaluing Networking

### The Power of Referrals

Many make the mistake of walking into the job market with an attitude of invincibility. Straight out of college, it's easy to fall into the trap of thinking success is a solo journey — that asking for help is beneath you. I was no different. With outstanding grades and a strong self-image, I initially shunned the idea of networking. This could not have been more foolish.

My perspective shifted dramatically after struggling to land my first technical role for quite a long time. Despite my reluctance, it was actually a referral from my uncle, a manager at a small tech company, that paved the way for my first internship that set my career trajectory soaring. What seemed negligible at the time was, in fact was a crucial stepping stone as it set my career trajectory on an upward path.

### Building on Opportunities

The lesson is clear: **leverage your network**. Whether through direct relatives, distant connections, or extended circles, referrals can dramatically enhance your job prospects. They may not guarantee a position but can certainly open doors that would otherwise remain shut.

Every opportunity, no matter how small, has the potential to elevate your career. That initial internship, which may seem trivial, is often just the beginning of a domino effect leading to bigger and better offers. Remember, there's no shame in asking for help. In the competitive tech landscape, having someone vouch for your abilities can make a vast difference. Understand that humility and recognizing when to lean on others for support is a strength, not a weakness.

## Mistake 2: Giving Up Too Easily

### The Fear of Rejection

It's not uncommon to see people stop applying for jobs after receiving only one or two rejections. The initial enthusiasm gives way to a fear of failure, a reluctance to face further rejection. This mindset is profoundly limiting and stands in stark contrast to those who keep going, applying to numerous positions despite setbacks.

My own experience with Google wasn't smooth. Despite failing the interview process three times, I didn't let these setbacks deter me. You have to understand that rejection is not always a reflection of your worth. There are many factors that can lead to rejection, many of which are beyond your control. External factors such as timing, company budget constraints, and the overall competitive landscape play significant roles.

### Cultivate a Resilient Attitude

The key is to not take rejection personally. Instead, view each setback as a learning opportunity. Prepare more diligently, refine your resume, and continue applying. Ignore critics who take great pleasure in your setbacks and embrace a culture that views **failure as a necessary step on the road to success**.

### Don't Be Swayed by Negative Media Narratives

It's easy to be discouraged from applying to certain companies based on negative media narratives or rumors. For example people saying the google is too "woke" or some other company is too conservative. You experience can vastly differ based on several factors including your team, project, location, and your direct managers. Broad narratives might not accurately reflect what your day-to-day life in the company would be like. Stereotypes and generalizations often overshadow the reality of working in big tech. But in real life most engineers are focused on the technology and do not participate in politics and controversies.

While a company may have a general culture, it's made up of individuals with diverse thoughts and beliefs. You might find your niche or community within a broader company culture that's not immediately apparent from the outside. So, don't allow external opinions to interfere with your career choices or limit your ambitions.

## Mistake 3: Overemphasis on Technical Skills

### The Human Element of Interviews

It's a common misconception that technical skills alone can secure you the job. While technical knowledge is undeniably crucial, it's not the only factor interviewers consider. The ability to showcase your personality, humor, and interpersonal skills can significantly impact the interviewer's perception. People are inherently social beings, and adopting an attitude of friendly professionalism can make you more relatable and likable to interviewers. It's about finding the right balance between demonstrating your technical capabilities and being someone the team would enjoy working with.

### Avoid Being Overly Serious

Candidates who excel technically but come across as unapproachable or overly serious might inadvertently give off the wrong impression. An interviewer's subjective experience of the interaction can heavily influence their feedback, sometimes more than the technical content itself. Show that you're not only competent but also a pleasant and engaging person to have in the workplace. This approach can tip the scales in your favor, especially in close calls.

## Mistake 4: Not Tailoring Your Preparation

### Understanding the Role and Company

Many people underestimate the importance of thorough preparation for technical interviews. There's a misconception that being a good coder is enough. However, preparing personal and technical stories in advance can give you a significant edge. Researching the company's technology stack, recent projects, and the role's responsibilities can help you select which stories to prepare. If you're applying for a position that emphasizes data analysis, be ready with stories that showcase your experience with data manipulation and visualization tools.

Having a set of stories ready, including technical projects and personal experiences that highlight your problem solving abilities, teamwork, and communication skills, ensures you're never caught off guard. Reflect on what makes your experience unique. Perhaps there was a project where your unconventional approach led to success, or a time when your quick learning ability allowed you to contribute to a project outside of your expertise. These stories can be seamlessly woven into your responses, making for a more compelling interview.

### The Dangers of Improvisation

Relying on improvisation can lead to missed opportunities to share impactful stories. Post-interview regrets about unmentioned projects or achievements are common among unprepared candidates. A structured approach to preparation can prevent such oversights.

Anticipate the kinds of questions you might be asked and prepare your stories accordingly. This approach prevents scrambling for answers during the interview and ensures you present a coherent and compelling narrative.

While having stories at the ready is crucial, there's a fine line between being prepared and sounding rehearsed. Practice telling your stories in a way that feels natural and conversational. This approach makes for a more engaging interaction and helps prevent the robotic delivery that can come from over-memorization. Remember, the goal is to demonstrate your skills and personality, not just recite your achievements.

Before stepping into the interview, seek feedback on your prepared stories from peers or mentors. They can provide insights you might have overlooked and suggest improvements. Additionally, practicing with someone can help alleviate nerves and refine your delivery, making for a smoother presentation during the actual interview.

### Beyond College Coursework

For recent graduates, standing out means going beyond mere coursework. Engaging in personal projects or independent learning can provide rich material for interviews. Demonstrating initiative and a capacity for self-directed learning can be just as impressive as formal work experience.

A well-chosen project can speak volumes about your capabilities. It doesn’t have to be overly complex; even a basic application demonstrating communication between a client and server can be impressive. The key is to discuss the technical challenges faced, the solutions you implemented, and the technologies you used. This practical experience often carries more weight than theoretical knowledge alone.

## Mistake 5: Dwelling Too Long on a Single Problem

### Anticipating Follow-Up Questions

A frequent mistake is spending an excessive amount of time on one problem, under the false assumption that it's the sole focus of the session. This mistake can prevent you from showcasing the breadth of your knowledge and skills. Remember, the interviewer likely has multiple questions planned, and your goal should be to demonstrate your problem-solving skills across as many scenarios as possible. Initial questions often lead to follow-up questions or entirely new problem

Efficiency and time management are critical during interviews. Demonstrating your ability to work through problems quickly and accurately reflects well on your productivity and problem-solving skills. Interviewers are interested in seeing a wide range of your abilities, not just your depth in one area.

It’s about finding the right balance between thoroughness and efficiency. While it’s important to solve problems correctly, being able to do so quickly and move on to additional questions is equally important

One strategy is to quickly outline your approach before diving into the details. This helps you stay on track and ensures you cover all necessary aspects of the problem without getting bogged down in one area.

## Mistake 6: Neglecting to Write Code

### Show Your Coding Skills

A lot of people think that discussing solutions or laying out strategies is enough. However, interviewers also expect to see your ability to translate complex ideas and theoretical solutions into executable code. It's an essential part of the interview where many candidates fail. Demonstrating your coding skills doesn't only mean solving the problem at hand but doing so with an emphasis on correct syntax, logical structure, and algorithmic efficiency.

Your code is often documented as a part of your interview performance. Therefore, it's crucial to write code that not only works but is also clear and easy to read. This is your chance to showcase your coding standards and attention to detail.

### Preparation Through Practice

Do not underestimate the importance of practicing coding under time constraints similar to those you'll face in interviews. Time pressure and the expectation to verbalize your thought process while coding can be challenging. To navigate this successfully, you can use [online coding platforms](https://devinterview.io/) that offer problems mimicking real interview scenarios. Practicing timed coding challenges can dramatically improve your ability to think and code efficiently under pressure in the real interview.

## Mistake 7: Insufficient Focus on Analysis

### Jumping Too Quickly into Coding

A common mistake is rushing into coding without adequate analysis. Many people overlook the importance of discussing and analyzing the problem thoroughly before starting to code. This oversight can lead to suboptimal solutions and demonstrates a lack of strategic thinking. Take the time to talk through potential solutions, consider different approaches, and perform [time and space complexity analysis](https://devinterview.io/questions/data-structures-and-algorithms/big-o-notation-interview-questions/).

Your ability to analyze problems and discuss potential solutions is as important as your coding skills. Illustrating your analytical prowess can set you apart from candidates who focus solely on the coding aspect. It signals to interviewers that you possess a balanced skill set essential for tackling complex engineering problems.

## The Most Important Tip: Master the Basics

At the heart of excelling in technical interviews lies a deep, solid understanding of the basics. This forms the bedrock upon which you can build and expand your knowledge to tackle a wide array of challenges. Focusing on the fundamentals of [data structures and algorithms](https://devinterview.io/questions/data-structures-and-algorithms/), and [software architecture](https://devinterview.io/questions/software-architecture-and-system-design/) is non-negotiable for anyone aiming to navigate technical interviews with confidence.

### Data Structures and Algorithms

A profound understanding of [data structures and algorithms](https://devinterview.io/questions/data-structures-and-algorithms/) forms the backbone of computer science and, by extension, technical interviews. Mastery in these domains equips you with the tools to approach and solve complex problems efficiently. This is not just about recognizing which data structure or algorithm to use, but also understanding why it's the optimal choice, how it operates under the hood, and how it can be adapted or optimized for specific scenarios.

### Software Architecture

An equally important, though sometimes overlooked, aspect is a well-rounded grasp of [software architecture](https://devinterview.io/questions/software-architecture-and-system-design/) principles. For roles that require system design or require a big-picture understanding of software systems, demonstrating knowledge in software architecture is crucial. It shows you're not just a coder, but a software engineer capable of considering the wider implications of design decisions, how your code fits within larger systems, and how to design scalable, maintainable solutions.

### Practice Makes Perfect

Consistent practice is key to internalizing these concepts. Leverage a variety of resources including coding interview preparation platforms, authoritative books, and engaging in mock interviews to fine-tune your problem-solving skills. The more you practice, the more intuitive problem-solving becomes, allowing you to tackle interview questions with ease.

Thanks for reading. Best of luck in your technical interview!

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