Programming Concepts (Sample)
示例Eight core concepts most often cited in computer science.
8 张卡片
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- Difference between stack and queue?A stack is LIFO (last-in, first-out); a queue is FIFO (first-in, first-out).
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复制卡片 ID - What is a hash table?A structure that maps keys to array indices via a hash function, giving average O(1) lookup, insert, and delete.
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复制卡片 ID - What is recursion?A function that calls itself directly or indirectly, breaking a problem into smaller instances of the same problem.
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复制卡片 ID - What is a linked list?A linear data structure of nodes linked by pointers — O(1) insert/delete, O(n) random access.
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复制卡片 ID - What is SQL JOIN?Combines rows from two tables based on a related column: INNER, LEFT, RIGHT, or FULL.
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复制卡片 ID - What is an API?A contract between applications that defines the format and semantics of requests and responses.
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复制卡片 ID - What is HTTP status 404?The server could not find the requested resource.
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