Q101. Where do you see yourself in five years?
Show ambition that is compatible with the company and role. Strong answer: "In the next year I want to fully own my area and hit measurable reliability and delivery goals...
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Q102. What is the difference between SQL and NoSQL and when do you choose each?
SQL (relational): rigid schema, ACID transactions, powerful joins and ad-hoc queries, mature tooling. Excel at structured, relational data with integrity requirements suc...
Q103. List vs dictionary comprehension performance and readability.
Comprehensions are typically faster than an equivalent for-loop with append because the iteration runs in optimised bytecode without repeated method lookups. ```python sq...
Q104. What is the difference between relative, absolute, fixed and sticky positioning?
- static: default, follows normal flow. - relative: stays in flow but offsets from its normal position; also establishes a containing block for absolutely positioned desc...
Q105. How do you define and track product-market fit?
Product-market fit is the point where a product satisfies a strong market demand well enough that it grows, retains and pulls customers in without heroic effort. I do not...
Q106. How do you support a student who is falling behind?
First I find out why, because the cause determines the response. It could be a missing prerequisite, attendance, language, motivation, or something happening outside scho...
Q107. When should you escalate a customer issue, and how do you do it well?
I escalate when the issue exceeds my authority, requires specialist knowledge, or risks breaching an SLA or damaging the relationship. Good escalation is early and comple...
Q108. What is the difference between gross margin and net margin?
Gross margin is revenue minus cost of goods sold, divided by revenue. It measures how much is left after the direct costs of delivering what you sell, such as materials, ...
Q109. How do you measure the ROI of a marketing campaign?
ROI is the incremental profit attributable to a campaign divided by its cost. The hard part is the word incremental. I start by agreeing on the metric that represents val...
Q110. What does ACID mean in the context of transactions?
ACID describes the guarantees of a transaction, a unit of work that either completes fully or not at all. - Atomicity: all statements commit or all roll back. Implemented...