Exam (elaborations)
TECH ELEVATOR TECHNICAL INTERVIEW EXAM 2024/2025
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TECH ELEVATOR TECHNICAL INTERVIEW EXAM 2024/2025
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TECH ELEVATOR TECHNICAL INTERVIEW EXAM 2024/2025What is the difference between an absolute path and a relative path? -
Precise 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? - Precise Answer ✔✔Print (or present) working
directory (or folder)
What does CD do? - Precise Answer ✔✔Changes directory
Describe GIT - Precise 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? - Precise 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. -
Precise 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? - Precise 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? -
Precise 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. -
Precise 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? - Precise Answer ✔✔Floats and doubles
have rounding errors.
What is casting? - Precise Answer ✔✔Casting is used to convert the
value of one type to another. Example: long x = 10
int y = int x;
What is narrowing in terms of casting? - Precise Answer ✔✔Going from
a larger variable to a smaller one.
Example: int smaller = (int) bigger;
, What is widening in terms of casting? - Precise Answer ✔✔Also known
as implicit casting, this is going from a smaller variable to a larger
variable.
Example: int smallerNum = 5
Long biggerNum = smallerNum;
Describe truncation. - Precise Answer ✔✔The right side of the
"=" is evaluated first and sometimes this causes loss of accuracy so in
the case of x = 7;
y=3
double z = x/y, the answer would be 2 because x and y are ints and the
value is truncated and then handed over to z despite it being a double
that could handle 2.5.
What does a method signature identify? How? - Precise Answer
✔✔Who can call it (accessor), the return type (Ex: String), what to call
it (name of method), and what the input takes (parameters)
What are arrays made up of and what is their defining trait? - Precise
Answer ✔✔A series of values of the same type of data (elements). They
are of fixed size
Please write code to create a new array of Strings that has a size of 3. -
Precise Answer ✔✔String[] stringArray = new String[3];
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