GfK MODE Interview Questions, Process, and Tips

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'.
Answered by AI
Add your answer
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().
Answered by AI
Add your answer

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
Answered by AI
Add your answer
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
Answered by AI
Add your answer

Moderate level, maths reasoning questions

Q1. Family Background
Add your answer
Q2. Experience of your previous role
Add your answer

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
Answered by AI
Add your answer
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
Answered by AI
Add your answer