American Express Interview Questions, Process, and Tips

Q1. What is p value?
Ans. 
A p-value is a measure used in statistical hypothesis testing to determine the strength of evidence against the null hypothesis.
• A p-value is the probability of obtaining results as extreme as the observed results, assuming the null hypothesis is true.

• A p-value is compared to a significance level (usually 0.05) to determine if the null hypothesis should be rejected.

• A p-value less than the significance level indicates st
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Q2. Tell the output a**2
Ans. 
The output of a**2 is the square of the value of a.
• The output is the value of a multiplied by itself

• For example, if a = 3, then the output would be 9 (3*3)
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Q3. Difference between append() and concat
Ans. 
append() adds elements to a single DataFrame, while concat() combines multiple DataFrames.
• append() is a method used to add rows to a DataFrame.

• concat() is a function used to combine multiple DataFrames along a particular axis.

• append() modifies the original DataFrame, while concat() returns a new DataFrame.

• Example: df1.append(df2) vs pd.concat([df1, df2])
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Case study asked in Managerial Interview - Tell percentage of office going people in Gurgaon?

Q1. How to design scalable system
Ans. 
Designing a scalable system involves considering factors like load balancing, horizontal scaling, and fault tolerance.
• Utilize load balancing to distribute traffic evenly across servers.

• Implement horizontal scaling by adding more servers to handle increased load.

• Ensure fault tolerance by designing for redundancy and failover mechanisms.

• Use caching and database sharding to improve performance and scalability.

• Consider mic...read more
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Q2. How to debug and optimize code
Ans. 
Debugging and optimizing code involves identifying and fixing errors and improving performance.
• Use debugging tools like breakpoints, print statements, and logging to identify issues

• Analyze code for inefficiencies and refactor where necessary

• Optimize algorithms and data structures for better performance

• Profile code to identify bottlenecks and optimize critical sections

• Test changes to ensure they improve performance with
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Q1. Introduce yourself
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Q2. How to convince customer to pay more
Ans. 
Convince customers to pay more by highlighting the value of the product/service, offering discounts for early payment, and providing flexible payment options.
• Highlight the value of the product/service and how it meets the customer's needs

• Offer discounts for early payment to incentivize prompt payment

• Provide flexible payment options such as installment plans or payment extensions

• Emphasize the benefits of paying more, su...read more
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Q3. Mock call/scenario
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Q1. Introduce yourself
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Q2. Previous company experience
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Q3. Collections questions/scenarios
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Q1. General introduction and overall experience
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Q2. Communication skills
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Q1. Experience in total, explain previouse role,, product knowledge
Ans. 
I have 5 years of experience as a Senior Customer Service Advisor with extensive product knowledge in telecommunications.
• Managed a team of customer service representatives to ensure high levels of customer satisfaction

• Provided in-depth product knowledge training to new hires and existing team members

• Handled escalated customer complaints and resolved issues in a timely and efficient manner

• Collaborated with product devel...read more
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Q1. Scenario based questions
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