Analytics Engineer Interview Questions and Answers

Use binary search to minimize cost and find the correct medicine.

• Divide the tablets into two equal groups and weigh them.

• If the weights are equal, the correct medicine is in the other group.

• If the weights are unequal, repeat the process with the lighter group.

• Continue dividing and weighing until the correct medicine is found.

• This approach reduces the number of weighings required to find the correct medicine.

The 10-digit number in which i occurs a[i] times is 6210001000.

• The number has 6 zeros because i=0 occurs 6 times.

• The number has 2 ones because i=1 occurs 2 times.

• The number has 1 two because i=2 occurs 1 time.

• The number has 0 threes because i=3 occurs 0 times.

• The number has 0 fours because i=4 occurs 0 times.

• The number has 0 fives because i=5 occurs 0 times.

• The number has 1 six because i=6 occurs 1 time.

• The number has 0 sevens because i=7 occurs 0 times.

• The number has 0 eight...read more

It is impossible to accurately guess the number of people watching a particular movie show in the United Kingdom.

• The number of people watching a movie show can vary greatly depending on various factors such as the popularity of the movie, the time of day, the day of the week, and the location of the theater.

• To estimate the number of people watching a movie show, one would need access to data from ticket sales, theater capacities, and historical attendance patterns.

• Market rese...read more

The Coin on a Round Table puzzle involves determining the position of coins after a series of flips.

• Consider the initial arrangement of coins (e.g., heads or tails).

• Analyze the flipping pattern (e.g., every second coin).

• Use logical reasoning to predict the final arrangement.

• Example: If you flip every second coin starting from the first, track the changes.

Faced a performance issue in a React Native app due to heavy data processing, resolved by optimizing state management and using memoization.

• Identified performance lag during data rendering in a complex component.

• Used React's useMemo and useCallback hooks to optimize rendering.

• Refactored state management to minimize unnecessary re-renders.

• Implemented lazy loading for large datasets to improve initial load time.

• Conducted thorough testing to ensure the optimizations did not intr...read more

Reverse a given string

• Iterate through the string from end to beginning and append each character to a new string

• Use built-in functions like reverse() in some programming languages

• Consider edge cases like empty string or single character string