TECH ELEVATOR TECHNICAL INTERVIEW TOPICS/QUESTIONS|WITH CORRECT ANSWERS

What is the difference between an absolute path and a relative path? Correct Answer An absolute path starts at the root as an anchor while a relative path does not. The path is RELATIVE to the present, start location. What does PWD do? Correct Answer Print (or present) working directory (or folder) What does CD do? Correct Answer Changes directory Describe GIT Correct Answer Git is a distributed version control system that allows for saving checkpoints (like a video game), share code, compare past versions, allow for parallel development, and know who made changes. How do Github and Bitbucket differ from GIT? Correct Answer Github and Bitbucket are like Google Drive. They host the code, not the software. GIT is the software. Describe the technical relationship between Java and Javascript. Correct Answer Trick question! There is no technical relationship between Java and Javascript though newer versions of Java do include some elements of Javascript though. What kind of code does the Javac read? What kind of code does it change that into? Correct Answer Javac reads the source code (what developers write) and transform it into Byte code. What kind of code does the JVM read? What does it do with that code? Correct Answer The JVM reads Byte ode and interprets it into machine code for a specific platform (Linux, Mac, or Windows) Describe the process of going from source code to machine code. Correct Answer The JAVAC reads the source code and changes it into Byte code. The Byte code is then read by the machine specific JVM at run time which creates machine code that that kind of machine (Linux, Windows, or Mac) can read. What is the problem with using floats and doubles when the variable represents monetary values? Correct Answer Floats and doubles have rounding errors. What is casting? Correct Answer Casting is used to convert the value of one type to another. Example: long x = 10 int y = int x;