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Exam (elaborations)

CSCI 117 Exam 1 – Complete Study Guide and Practice Questions

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This document covers the key concepts for CSCI 117 Exam 1, including computer fundamentals, programming concepts, algorithms, variables, data types, control structures, functions, debugging, and problem-solving techniques. It includes comprehensive study notes, key definitions, worked examples, and practice questions with answer explanations to help students prepare effectively for the first exam. The material is organized for efficient review and reinforces the foundational principles of computer science and introductory programming.

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CSCI 117 EXAM 1 WITH VERIFIED
ANSWERS GRADED A+ (LATEST
UPDATE 2026)
Syntax - answer-specifies how program in the language are built up



Semantic - answer-specifies what the program means



Lexical Syntax - answer-spelling of words notation:

regular expression, ex) a*, ab+, (a|b)+

sample words: a, aa, aaa, ab, abb, abab,.



grammar (CFG) Context Free Grammar - answer-notation: BNF (Backus-Naur Form)
EBNF (extended Backus-Naur Form) syntax chart (graphical)



What are the 3 expression notations? - answer-Prefix, easy to decode



Infix, user friendly (easy to read)

-Needs precedence and associativity

-Only infix uses ( )



Postfix, evaluated by stack



Abstract Syntax Tree (AST) - answer-Uses op(+,-,*,/) , id(a,b,c), num(1,2,3)



Parse Tree - answer-Built from grammar



Unambiguous Grammar - answer-1. Keep precedence (Lower precedence up)

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