add assignment questions

1 files changed, 5 insertions, 0 deletions

diff --git a/README.md b/README.md
index e7fa523..866d9a4 100644
--- a/README.md
+++ b/README.md
@@ -102,3 +102,8 @@ The formal term for "doable" is `effectively computable`.
 * sequential search : start at the beginning of the list and search for the item
   by visiting each item in the list until the end. (unsorted data)
 * library: collection of useful, prewritten algorithms.
+* abstraction: refers to the separation of the high-level view of an entity or
+  an operation from the low-level details of its implementation.
+* top-down design: Viewing an operation at a high level of abstraction and
+  fleshing out the details of its implementation at a later time constitute an
+  imporant computer science problem-solving strategy.