PhoneScreenInfo_ResumeBased Cheat Sheet by jash24

What is OOP?

Object­-or­iented progra­mming (OOP) is a progra­mming language model organized around objects rather than "­act­ion­s" and data rather than logic. Histor­ically, a program has been viewed as a logical procedure that takes input data, processes it, and produces output data.

What is a class?

A set or category of things having some property or attribute in common and differ­ent­iated from others by kind, type, or quality.

The ability to process objects differ­ently depending on their data type or class. More specif­ically, it is the ability to redefine methods for derived classes. A polymo­rphic type is a type whose operations can also be applied to values of some other type.

The packing of data and functions into a single component. (Using classes). Allows selective hiding of properties and methods in an object by building an impene­trable wall to protect the code from accidental corrup­tion.

Destru­ctor?

A method which is automa­tically invoked when the object is destroyed. Main purpose is to free the resources (memory alloca­tions, open files or sockets, etc.)

Traverse

Print all the array elements one by one.

Deletion

Deletes an element at the given index

Update

Updates an element at the given index

Next

Each link of a linked list contains a link to the next link called Next

What is a binary search tree?

A binary tree with a special provision where a node's left child must have a value less than its parent's value and node's right child must have value greater than it's parent value.

What is a recursive function?

one which calls itself, directly or calls a function that in turn calls it. Every recursive function follows the recursive proper­ties- base case where functions stop calling itself and progre­ssive approach where the functions tries to meet the base case in each iteration.

What happens in insertion sort?

Divides the list into two sub-lists, sorted and unsorted. It takes one element at time and finds it an approp­riate location in the sorted sub-list and inserts there.

What is recursive backtr­acking?

Backtr­acking reduces the # of possible value assign­ments that we consider, because it never considers invalid assign­ments.

Which companies are in cyber security?

root9B, Herjavec Group, IBM, Checkpoint Software

Exigence? News? Why?

Computer and computer networks are involved in almost every aspect of our lives. Anything connected to the internet is at risk of getting hacked. Internet of Things is an innovation that is really common and useful nowadays. However, it is another area for hackers to penetrate. Internet of Things brings about another vulner­abi­lity. This is why cyber security today is so important. We have so much technology that is connected to the internet.