FINAL CSE 3901 EXAM WITH CORRECT ANSWERS

FINAL CSE 3901 EXAM WITH CORRECT |\ |\ |\ |\ |\ |\




ANSWERS


Advantages Thin Clients have over Thick Clients - CORRECT |\ |\ |\ |\ |\ |\ |\ |\ |\


ANSWERS ✔✔performance, flexibility, robustness, security
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Unit Testing - CORRECT ANSWERS ✔✔Individual components are
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tested in isolation under unit test (UUT).
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Black box is testing only to specifications, White box is testing
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based on code structure|\ |\ |\




Integration Testing - CORRECT ANSWERS ✔✔Modules are tested|\ |\ |\ |\ |\ |\ |\ |\


in combination to check interfaces. Best done incrementally.
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Bottom Up: start with most basic, easy to exercise all features,
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can write a driver for higher levels
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Top down: Start at top (main) test interfaces early
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System Testing - CORRECT ANSWERS ✔✔Verify that systems as a
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whole meet the requirements and specifications.
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alpha: tested by developers before release
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beta: by "friendly customers" before general release
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acceptance: by end customer, they better be happy! |\ |\ |\ |\ |\ |\ |\




TDD - CORRECT ANSWERS ✔✔Test Driven Development
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,Repository = ? - CORRECT ANSWERS ✔✔working tree + store
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working tree - CORRECT ANSWERS ✔✔the project itself, an
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ordinary directory including files and sub directories. developers
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retrieve copies to work on |\ |\ |\ |\




store - CORRECT ANSWERS ✔✔hidden directory (.git) in root
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directory of working tree. Brings in a time component. You should
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never access .git directly
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Commit - CORRECT ANSWERS ✔✔creates a snapshot, each is
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identified by a hash and is almost guaranteed to be unique.
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Index - CORRECT ANSWERS ✔✔virtual snapshot stored at
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.git/index. this is a gateway for moving changes made in the
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working tree to the store |\ |\ |\ |\




Snapshot - CORRECT ANSWERS ✔✔apply your modifications in
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the working copy to the repository. changes the repository,
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"commits" changes
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History - CORRECT ANSWERS ✔✔Directed Acyclic Graph of
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snapshots. Stacking a snapshot and its predecessors gives a
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snapshot of the project (aka a revision or a version)
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Branch - CORRECT ANSWERS ✔✔pointer to a commit
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,Head - CORRECT ANSWERS ✔✔a special reference, usually
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pointing to a branch. think that this is "attached" to a branch
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git status - CORRECT ANSWERS ✔✔displays differences between
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head and index |\ |\




git add - CORRECT ANSWERS ✔✔updates index based on files in
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working tree |\




git commit - CORRECT ANSWERS ✔✔stores current content of
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index along with a log message (makes wt == index)
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git branch - CORRECT ANSWERS ✔✔creates a new branch
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pointing to where the head is |\ |\ |\ |\ |\




git checkout xxx - CORRECT ANSWERS ✔✔updates index and
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working tree, points head to whatever the argument is. only do
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this if the working tree is clean
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git log - CORRECT ANSWERS ✔✔display snapshots in a store, DAG
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merge - CORRECT ANSWERS ✔✔bring history together, bring
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work from another branch into the current branch
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DVC - CORRECT ANSWERS ✔✔Distributed Version Control,
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multiple people distributed across a network contributing to a
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central repository |\

, Dynamically Typed Programming Language - CORRECT ANSWERS |\ |\ |\ |\ |\ |\


✔✔variables do not have to have types, objects (which variables
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point to) do |\ |\




primitive types in ruby - CORRECT ANSWERS ✔✔numbers,
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strings, ranges, regular expressions
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numbers - CORRECT ANSWERS ✔✔integers (Fixnum, Bignum)
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float: double precision!
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strings - CORRECT ANSWERS ✔✔over 75 built in methods
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split - CORRECT ANSWERS ✔✔splits a string into an array of
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strings based on a separator
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chomp - CORRECT ANSWERS ✔✔returns a string with the
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separator string removed. if nothing, good for removing
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whitespace & newlines |\ |\




ranges - CORRECT ANSWERS ✔✔1..10 is represented as two
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values of type fixnum |\ |\ |\




0..4 includes start and end value
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0...4 does not
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Local (ruby) - CORRECT ANSWERS ✔✔starts with a lowercase
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letter or _ |\ |\