The Perkinelmer, Inc. Research Scientist interview guide, interview questions, salary data, and interview experiences.

Perkinelmer, Inc. Research Scientist Interview Guide

Getting ready for an Research Scientist interview at Perkinelmer, Inc.? The Perkinelmer, Inc. Research Scientist interview span across 10 to 12 different question topics. In preparing for the interview:
<ul>
<li>Know what skills are necessary for Perkinelmer, Inc. Research Scientist roles.</li>
<li>Gain insights into the Research Scientist interview process at Perkinelmer, Inc..</li>
<li>Practice real Perkinelmer, Inc. Research Scientist interview questions.</li>
</ul>
Interview Query regularly analyzes interview experience data, and we've used that data to produce this guide, with sample interview questions and an overview of the Perkinelmer, Inc. Research Scientist interview.


Getting ready for an Research Scientist interview at Perkinelmer, Inc.? The Perkinelmer, Inc. Research Scientist interview span across 10 to 12 different question topics. In preparing for the interview:

- Know what skills are necessary for Perkinelmer, Inc. Research Scientist roles.
- Gain insights into the Research Scientist interview process at Perkinelmer, Inc..
- Practice real Perkinelmer, Inc. Research Scientist interview questions.

Interview Query regularly analyzes interview experience data, and we've used that data to produce this guide, with sample interview questions and an overview of the Perkinelmer, Inc. Research Scientist interview.
        

Overview

What Perkinelmer, Inc. Looks for in a Research Scientist

Interview Tips

We've gathered this data from parsing thousands of interview experiences sourced from members.

We've gathered this data from parsing thousands of interview experiences sourced from members.

Perkinelmer, Inc. Research Scientist Interview Process

Let’s say we’ve trained a text-to-image model that sometimes generates images with toxic or unsafe content, even when the input prompt is neutral.

How would you adjust our inference pipeline to reduce the rate of toxic generations, and what trade-offs might we face?

How would you modify inference to limit toxic outputs from a text-to-image model?

Toxic Generations

Responsible AI & Security

There are two lists of dictionaries representing friendship beginnings and endings: <code>friends_added</code> and <code>friends_removed</code>. Each dictionary contains the <code>user_ids</code> and <code>created_at</code> time of the friendship beginning /ending.

Write a function <code>friendship_timeline</code> to generate an output that lists the pairs of friends with their corresponding timestamps of the friendship beginning and then the timestamp of the friendship ending.

Note: There can be multiple instances over time when two people became friends and unfriended; only output lists when a corresponding friendship was removed.

Example:

Input:

<pre tabindex="0" class="chroma"><code>friends_added = [
 {&#39;user_ids&#39;: [1, 2], &#39;created_at&#39;: &#39;2020-01-01&#39;},
 {&#39;user_ids&#39;: [3, 2], &#39;created_at&#39;: &#39;2020-01-02&#39;},
 {&#39;user_ids&#39;: [2, 1], &#39;created_at&#39;: &#39;2020-02-02&#39;},
 {&#39;user_ids&#39;: [4, 1], &#39;created_at&#39;: &#39;2020-02-02&#39;}]

friends_removed = [
 {&#39;user_ids&#39;: [2, 1], &#39;created_at&#39;: &#39;2020-01-03&#39;},
 {&#39;user_ids&#39;: [2, 3], &#39;created_at&#39;: &#39;2020-01-05&#39;},
 {&#39;user_ids&#39;: [1, 2], &#39;created_at&#39;: &#39;2020-02-05&#39;}]
</code></pre>

Output:

<pre tabindex="0" class="chroma"><code>friendships = [{
 &#39;user_ids&#39;: [1, 2],
 &#39;start_date&#39;: &#39;2020-01-01&#39;,
 &#39;end_date&#39;: &#39;2020-01-03&#39;
 },
 {
 &#39;user_ids&#39;: [1, 2],
 &#39;start_date&#39;: &#39;2020-02-02&#39;,
 &#39;end_date&#39;: &#39;2020-02-05&#39;
 },
 {
 &#39;user_ids&#39;: [2, 3],
 &#39;start_date&#39;: &#39;2020-01-02&#39;,
 &#39;end_date&#39;: &#39;2020-01-05&#39;
 },
]
</code></pre>

Write a function friendship_timeline to generate an output that lists the pairs of friends with their corresponding timestamps of the friendship beginning and then the timestamp of the friendship ending. 

Friendship Timeline

Python & General Programming

The probability that it will rain tomorrow is dependent on whether or not it is raining today and whether or not it rained yesterday.

If it rained yesterday and today, there is a 20% chance it will rain tomorrow. If it rained one of the days, there is a 60% chance it will rain tomorrow. If it rained neither today nor yesterday, there is a 20% chance it will rain tomorrow.

Given that it is raining today and that it rained yesterday, write a function <code>rain_days</code> to calculate the probability that it will rain on the nth day after today.

Example:

Input:

<pre tabindex="0" class="chroma"><code>n=5
</code></pre>

Output:

<pre tabindex="0" class="chroma"><code>def rain_days(n) -&gt; 0.39968
</code></pre>

Given that it is raining today and that it rained yesterday, write a function to calculate the probability that it will rain on the nth day after today.

Question	Topic	Difficulty	Ask Chance
Toxic Generations	Responsible AI & Security	Medium	Very High
Friendship Timeline	Python & General Programming	Hard	High
Rain in N Days	Probability	Hard	Medium

Perkinelmer, Inc. Research Scientist Interview Guide

Overview

What Perkinelmer, Inc. Looks for in a Research Scientist

Interview Tips

Perkinelmer, Inc. Research Scientist Interview Process

Perkinelmer, Inc. Research Scientist Interview Questions