Apotex Research Research Associate Interview Questions and Answers

Q1. How many stability Conditions there?Explain in details
Ans. 
There are three stability conditions: asymptotic stability, bounded-input bounded-output stability, and Lyapunov stability.
• Asymptotic stability: System returns to a stable equilibrium point over time.

• Bounded-input bounded-output stability: System output remains bounded for bounded input signals.

• Lyapunov stability: System satisfies Lyapunov's direct method or Lyapunov's indirect method.
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Q2. Types of Stability Zone & Which we are Coming
Ans. 
There are three types of stability zones: Zone I, Zone II, and Zone III. We are currently in Zone III.
• Zone I: Most stable, low risk of failure, typically used for long-term storage of products.

• Zone II: Intermediate stability, moderate risk of failure, used for products with moderate shelf life.

• Zone III: Least stable, high risk of failure, used for products with short shelf life or requiring special storage conditions.
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Q3. Particle Size Analyser Basic Principle , Limit , Unit , Range, PDI
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Q4. What is Zeta Sizer , Basic Principle , Unit , Range , Uses
Ans. 
Zeta Sizer is a device used to measure the electrophoretic mobility of particles in a liquid medium.
• Basic principle involves measuring the velocity of particles in an electric field.

• Unit of measurement is usually in zeta potential (mV).

• Range of measurement typically varies depending on the specific model of the Zeta Sizer.

• Common uses include studying colloidal stability, particle size distribution, and surface charge o
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Q5. What is Solution Clarity Test?? How to determine it
Ans. 
Solution Clarity Test is a test to determine the transparency of a solution.
• Solution Clarity Test is used to assess how clear or transparent a solution is.

• It is commonly performed in industries such as pharmaceuticals, food and beverage, and cosmetics.

• One common method to determine solution clarity is visual inspection against a light source.

• Another method is to use a spectrophotometer to measure the absorbance of ligh...read more
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Q6. What is Osmolarity ? Unit , Limit , Range , Definition
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It was 3 section test, each 14-18 mins with 14-18 questions that too very difficult to solve. The terrible aptitude test I have ever seen in my life.

Q1. This was Microsoft teams meet, I had no problem at all while attending & answering of all 3 interviewer's questions. I cracked it very well. The interviewers was high educated, soft spoken & well professi...read more
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Q1. How you will start the method development?
Ans. 
To start method development, I would first review the literature, define the objectives, gather necessary materials and equipment, and plan the experimental design.
• Review the existing literature to understand the current knowledge and methods used in the field.

• Define clear objectives and research questions to guide the method development process.

• Gather all the necessary materials, reagents, and equipment required for t...read more
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Q2. What is Data integrity
Ans. 
Data integrity refers to the accuracy, consistency, and reliability of data throughout its lifecycle.
• Data integrity ensures that data remains unchanged and reliable over time.

• It involves maintaining the accuracy and consistency of data during storage, processing, and transmission.

• Data integrity can be achieved through various methods such as checksums, encryption, and error detection and correction.

• Examples of data int...read more
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