GfK MODE Interview Questions and Answers

Q1. What is coalesce
Ans. 
Coalesce is a function used to return the first non-null value in a list of expressions.
• Coalesce function is commonly used in SQL to handle null values.

• It takes multiple arguments and returns the first non-null value.

• Example: COALESCE(column1, column2, 'default') will return the value of column1 if not null, else column2, and if both are null, it will return 'default'.
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Q2. What is repartition
Ans. 
Repartition is the process of redistributing data across partitions in a distributed system.
• Repartitioning helps in balancing the workload and improving performance in distributed computing environments.

• It involves moving data between partitions based on certain criteria such as key values or hash functions.

• Repartitioning can be done in Spark using operations like repartition() or coalesce().
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Q1. Non repeatable character
Ans. 
A non repeatable character is a character that appears only once in a given string.
• Iterate through the string and count the frequency of each character

• Identify the characters that have a frequency of 1

• Return the first non repeatable character found
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Q2. Sort list without sort method
Ans. 
Sort list without using sort method
• Create a custom sorting function using loops

• Compare each element with every other element to determine the correct order

• Swap elements based on the comparison results
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Moderate level, maths reasoning questions

Q1. Family Background
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Q2. Experience of your previous role
Ans. 
In my previous role, I managed cross-functional teams to deliver projects on time and within budget, enhancing client satisfaction.
• Led a team of 10 in a software development project, achieving a 20% reduction in delivery time.

• Implemented Agile methodologies, resulting in a 30% increase in team productivity.

• Facilitated weekly stakeholder meetings to ensure alignment and address any project risks promptly.

• Managed a budge...read more
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Q1. Tell me about yourself
Ans. 
Experienced Operations Executive with a proven track record in optimizing processes and driving efficiency.
• Over 10 years of experience in operations management

• Skilled in process improvement and cost reduction strategies

• Strong leadership and team management abilities

• Implemented new systems that increased productivity by 20%

• Managed a team of 50+ employees to achieve company goals
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Q2. What do you know about the role
Ans. 
The Operations Executive is responsible for overseeing and managing the daily operations of a company to ensure efficiency and productivity.
• Responsible for developing and implementing operational strategies

• Overseeing day-to-day operations to ensure smooth running of the business

• Managing resources effectively to meet company goals

• Analyzing data and performance metrics to make informed decisions

• Collaborating with other d...read more
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