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In number theory, a narcissistic number [1] [2] (also known as a pluperfect digital invariant (PPDI), [3] an Armstrong number [4] (after Michael F. Armstrong) [5] or a plus perfect number) [6] in a given number base is a number that is the sum of its own digits each raised to the power of the number of digits.
Some questions involve projects that the candidate has worked on in the past. A coding interview is intended to seek out creative thinkers and those who can adapt their solutions to rapidly changing and dynamic scenarios. [citation needed] Typical questions that a candidate might be asked to answer during the second-round interview include: [7]
First self-published in 2008, her book Cracking the Coding Interview provides guidance on technical job interviews, and includes solutions to example coding interview questions. [ 4 ] [ 5 ] As of 2015, the book was in its sixth edition and have been translated into seven languages.
Armstrong was born in Bournemouth, England in 1950. [1] [2] At 17, Armstrong began programming in Fortran on his local council's mainframe. [1] Armstrong graduated with a B.Sc. in Physics from University College London in 1972. [2] He received a Ph.D. in Computer Science from the Royal Institute of Technology (KTH) in Stockholm, Sweden in 2003.
Armstrong's axioms are a set of axioms (or, more precisely, inference rules) used to infer all the functional dependencies on a relational database. They were developed by William W. Armstrong in his 1974 paper. [ 1 ]
Boxing's most prominent use is in Java where there is a distinction between reference and value types for reasons such as runtime efficiency and syntax and semantic issues. In Java, a LinkedList can only store values of type Object. One might desire to have a LinkedList of int, but this is not directly possible.
For example, the ARM Cortex-A32 supports only AArch32, [163] the ARM Cortex-A34 supports only AArch64, [164] and the ARM Cortex-A72 supports both AArch64 and AArch32. [165] An ARMv9-A processor must support AArch64 at all Exception levels, and may support AArch32 at EL0.
Meyer described the Eiffel software development method, based on a small number of key ideas from software engineering and computer science, in Object-Oriented Software Construction. [20] Essential to the quality focus of Eiffel is Meyer's reliability mechanism, design by contract , which is an integral part of both the method and language.