Cs50 - Study guides, Class notes & Summaries

schema decide on the _________, or format, of our data in advance by choosing the columns database a file or program that stores data flat-file database a database that only contains one table of data; example: CSV files KeyError error raised when a dictionary key is not found canonicalize standardizing data (e.g. all uppercase, strip whitespace before and after) relational databases programs that store data, ultimately in files; similar in spirit to s...

CS50 EXAM QUESTIONS CORRECTLY ANSWERED. Define "Function." - CORRECT ANSWER o Functions are action verbs that tell you to do some sort of action (ex. pick up, call, open to, etc) Define "conditionals." - CORRECT ANSWER o Conditionals are like a crossroad where we use "if" and "then" statements/concepts What are Boolean expressions? - CORRECT ANSWER o Boolean expressions are "yes"/"no" questions What can help us write, run, and translate our code? - CORRECT ANSWER Tools ...

CS50 Harvard EDX Written Exam Questions and Answers. What is a byte? - CORRECT ANSWER 8 bits what does the computer use physically to represent or store values? (a tiny little switch) - CORRECT ANSWER transistor functions - CORRECT ANSWER verbs or actions that tell the computer what to do conditions - CORRECT ANSWER forks in the road, either this or that boolean expression - CORRECT ANSWER questions in code with yes or no answers (true/false) loop - CORRECT ANSWER a cycle doi...

cs50 test with correct solutions

CS50, lecture 7: SQL Written Exam A Graded Answers. schema - CORRECT ANSWER decide on the _________, or format, of our data in advance by choosing the columns database - CORRECT ANSWER a file or program that stores data flat-file database - CORRECT ANSWER a database that only contains one table of data; example: CSV files KeyError - CORRECT ANSWER error raised when a dictionary key is not found canonicalize - CORRECT ANSWER standardizing data (e.g. all uppercase, strip whitespac...

Harvard CS50: AI With Python Review Practice Exam Questions. Agent - CORRECT ANSWER entity that perceives its environment and acts upon that environment. state - CORRECT ANSWER a configuration of the agent and its environment. initial state - CORRECT ANSWER the state in which the agent begins. actions - CORRECT ANSWER choices that can be made in a given state. Transition Model - CORRECT ANSWER a description of what state results from performing any applicable action in any state...

CS50 FINAL EXAM PREDICTION QUESTIONS. how does computer differentiate between letters and numbers? - CORRECT ANSWER file types: txt, doc, excl blah - CORRECT ANSWER

Harvard CS50 - C Medium Pre-Test Exam Questions. // - CORRECT ANSWER comment if (x < y) - CORRECT ANSWER true is x is less than y else if (x > y) - CORRECT ANSWER nested if x is greater than y

Harvard CS50 Week 1: Data Types & Variables Questions And Answers. What is an "int?" - CORRECT ANSWER -The int data type is used for variables that will store integers - Integers always take up 4 bytes of memory(32 bits). Range of information that can be stored is limited to 32 bits What is an "unsigned int?" - CORRECT ANSWER - qualifier that effectively doubles the range of positive variables of that type at the expense of negative values What is a "char?" - CORRECT ANSWER - u...

Harvard CS50 Week 1: Data Types & Variables Questions and Answers. What is an "int?" - CORRECT ANSWER -The int data type is used for variables that will store integers - Integers always take up 4 bytes of memory(32 bits). Range of information that can be stored is limited to 32 bits What is an "unsigned int?" - CORRECT ANSWER - qualifier that effectively doubles the range of positive variables of that type at the expense of negative values What is a "char?" - CORRECT ANSWER - u...