Q81. What are your salary expectations?
Anchor on research, not on your current salary. - Research the market range for the role, level and location (levels.fyi, Glassdoor, industry surveys, peers). - Give a re...
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Q82. Explain dynamic programming and when to apply it.
DP solves problems with overlapping subproblems and optimal substructure by storing results and reusing them. Two styles: - Top-down memoisation: recursion plus a cache, ...
Q83. How does the Java memory model and garbage collection work?
Memory is divided into heap (shared objects) and per-thread stacks (frames, locals). The heap has a young generation (Eden plus two survivor spaces) and an old generation...
Q84. How do you narrow a union type?
Narrowing reduces a union to a subset within a control-flow branch. Techniques: - typeof for primitives. - instanceof for classes. - The in operator for property presence...
Q85. How do you measure whether learning outcomes were achieved?
I decide what evidence would prove the objective was met, then collect it in more than one way. Direct measures include a task, quiz or performance rubric aligned to the ...
Q86. How do you qualify a deal using a framework like BANT or MEDDIC?
BANT and MEDDIC are qualification frameworks that force honesty about whether a deal is real. BANT covers Budget, Authority, Need and Timing. It is simple and useful for ...
Q87. Explain database normalisation and the common normal forms.
Normalisation organises columns into tables to reduce redundancy and update anomalies. The common normal forms: - 1NF: atomic values, no repeating groups, each row unique...
Q88. When should you prefer composition over inheritance?
Inheritance is an is-a relationship: `Dog extends Animal` because every dog is an animal. Composition is a has-a relationship: `Car` holds an `Engine`. Inheritance gives ...
Q89. How do you design a reliable A/B test?
Start with a clear hypothesis and a primary metric tied to the business, plus guardrail metrics for regressions. Key steps: 1. Define the unit of randomization, usually t...
Q90. Explain precision and recall and when to prefer each.
Precision is the fraction of predicted positives that are truly positive: TP / (TP + FP). Recall, or sensitivity, is the fraction of actual positives that were found: TP ...