Upwork Perl Test Questions 2023 (Free) Updated

By e kaynaklar , in Upwork on Haziran 22, 2023 .

Context in Perl can be.
Answers:

conditional, referenced, literal, null
numeric, string, list, scala

associative, numeric, scalar, sparse
inary, string, list, scala
Boolean, numeric, string, null

A label, in Perl, is.
Answers:

a marker for the Perl interprete
a heading

a switch statement
the name of an operator
a component embedded in the code

How many times does the do statement allow you to execute the block of statements in a loop?
Answers:

Does not allow you to execute statements in a loop
At least once

Twice
Depends on the number of times specified
An indefinite number of times

A directory handle.
Answers:

is a program that handles your operating system
is a link from your computer program to the directory on your file system

does not have its own namespace
cannot be considered equivalent to a file handle
does not require the opendir function

A scalar variable can contain.
Answers:

only one data item at a time
several data items at a time, the number of which needs to be declared beforehand

unlimited items
two items at a time
an array of data items

How are hash references created?
Answers:

% $ reference
$ reference = \ % hash;

@ reference = \ % hash;
% hash=$reference;
$$reference= \ % hash;

How is an array assigned to an array?
Answers:

@array1=@array[1…6];
@array1=@array2;

@array=(1, “string”, 4,5, \@ array z);
By creating another array object
An array cannot be assigned to an array

Non-associative operators are those that.
Answers:

do not bind at all
change their associativity depending on the context

do not show precedence
ind themselves to whichever expression they are adjacent to
do not associate the lvalue with the expression on the right

Dereferencing refers to:
Answers:

accessing an array that contains a reference to another array
removing the reference

an undefined or empty reference
accessing values referred to by Perl references
a scalar variable that keeps track of where another variable is stored in memory

Context in Perl can be:
Answers:

conditional, referenced, literal, null
numeric, string, list, scalar

associative, numeric, scalar, sparse
inary, string, list, scalar
Boolean, numeric, string, null

A scalar variable can contain:
Answers:

only one data item at a time
several data items at a time, the number of which needs to be declared beforehand

unlimited items
two items at a time
an array of data items

Non-associative operators are those that:
Answers:

do not bind at all
change their associativity depending on the context

do not show precedence
bind themselves to whichever expression they are adjacent to
do not associate the lvalue with the expression on the right

61 NOT Answered Yet Test Questions:
(hold on, will be updated soon)

What does the abs_path method do?
Answers:

Gets the current working directory

Gets the absolute path of the paramete
Gets the absolute path of the input paramete
Gets the absolute path of the current working directory

Gets the current paramete

An atom cannot be
Answers:

a single character or digit, A-Z, a-z, 0-9

an escaped meta-characte
an escaped special meaning characte
a regular expression enclosed in parenthesis

a meta characte

Which of the following is not an alignment character?
Answers:

•

Which of the following translation modifiers matches all characters that are not part of the search string?
Answers:

The value assigned to an array cell must be.
Answers:

a scalar value

a variable value
a scalar or a variable value that resolves to a scalar value
null

None of the above

Which of the following characters denotes a comment in Perl?
Answers:

What does the pop function do?
Answers:

Takes elements off the end of an array

Puts elements into the first cell index of an array
Adds an element to the end of an array
Takes elements off the first index of the array

Modifies or deletes elements from the array

Which one of the following is a part of the if family of branching statements in Perl?
Answers:

if else
if elsif
if, if else, and if elsif

None of the above

Which of the following loops is usually used to process arrays?
Answers:

while

until
do
for / foreach

Which of the following can replace if else?
Answers:

Which of the following is not a rule for switches using the Getopt function?
Answers:

Switches begin with a dash character (-)
Switches that do not take a parameter are set to the value 0

Switches that take a parameter may or may not have space between the switch name and the switch value
Switches are not required to be in any orde
Switches are case-sensitive

What is the following code an example of? $hitCounter=sub {print "This page has been called $hits times";}; Answers:

Anonymous array
Anonymous hash

Object reference
Subroutine
Anonymous subroutine

Of which of the following switch syntax options is the following code an example of? GetOptions("extension:s"); Answers:

Sets the default syntax
Allows the option to be negated

Sets the input option to include a mandatory string argument
Sets the input option to include a mandatory integer argument
Sets the input option to include an optional string argument

What does @ARGV refer to?
Answers:

The number of elements in an array
An array loaded with the command-line arguments

A file handle used when processing an array
A file associated with a file handle
The name of your program

What are bare words?
Answers:

Comments with the # sign missing
Improperly declared variables
Operators
Character strings without surrounding quotation marks
Characters denoting a string

What does the following error indicate?

“Can’t Locate Function in @INC”
Answers:

You misspelled a function name
The last line of the required file returned a zero or null value
You forgot to type the comma after the first argument of a function
Your code is using a function that has been replaced by a newer function
You used an uninitialized value

Which of the following begins or ends a system command string in Perl?
Answers:

font size=5>”</font
font size=5>'</font
font size=5><></font
font size=5><!</font
font size=5>`</font

Dereferencing refers to.
Answers:

accessing an array that contains a reference to another array
emoving the reference
an undefined or empty reference
accessing values referred to by Perl references
a scalar variable that keeps track of where another variable is stored in memory

Which of the following is not true of labels?
Answers:

A label can go on any line
A label must begin with a character followed by any combination of letters or numbers that end with a colon
Reserved words cannot be used as labels
Labels are case sensitive
A label performs the same function as the last command

Which of the following operators is associated with writing to a program?
Answers:

•

| filename
filename |

Which of the following characters is the variable designator for scalar variables?
Answers:

The syntax of the sort function without a special purpose sort subroutine is:
Answers:

sort ( ) {$b cmp $a ;}
lvalue=sort list
$ name= ~tr/+/ /;
sortDescending ( ) {$b cmp $a;}
lvalue=sort subroutineName list;

Which of the following meta characters creates a single expression or atom?
Answers:

What does the following compound assignment operator signify? | =
Answers:

Exclusive OR the expression on the left of the operator with the expression on the right of the operator
Logical OR the expression on the left of the operator with the expression on the right of the operator
Left shift the expression on the left of the operator by the expression on the right of the operator
Binary OR the expression on the left of the operator with the expression on the right of the operator
Append the expression on the left of the operator with the expression on the right of the operator

The keyword ‘my’ is used to declare
Answers:

comments
are words
default variables
Lexical variables

Which of the following is not a feature of Perl?
Answers:

Portability
Interpreted language
Compiled language
Is used for CGI applications
Was originally used to generate reports that tracked errors

The foreach loop is usually used to process.
Answers:

arrays and hashes
a block of statements a number of times
lists
multi-dimensional arrays
namespaces

Which of the following is not a type of reference variables?
Answers:

Direct
Constant
Subroutine
Numeric
Symbolic

What does the switch syntax :f do?
Answers:

It allows the option to be negated
It sets the default syntax
It sets the input option to include an optional real-number argument
It sets the input option to include an optional integer argument
It sets the input option to include a mandatory real-number argument

The syntax of assigning to an array cell is.
Answers:

array=new Array(n);
scalar=@array[cellIndex]
@array[cellIndex]=scalar;
$array[cellIndex]=scalar;
$array[n]=newArray;

Which of the following pertains to IO: :Handle?
Answers:

Base class for IO classes
Interface to file-open functions
Get the file descripto
Interface to IO: : *classes
Export file symbols

The s/// function.
Answers:

substitutes one string for another string
eturns the first position of a substring
eturns the last position of a substring
eturns the number of characters of a string
eturns or modifies a substring

Which of the following operators has/have the highest precedence?
Answers:

Increment/decrement
NOT, escape, sign operator
Dereference operator
Exponential operator
Parenthesis, function, quotation marks

Which of the following Getopt::Long Configuration variables refers to an internal error flag?
Answers:

debug
orde
pass_through
null
error

The syntax of the heredoc operator is.
Answers:

print >>heredoc – marker;
print <<heredoc – marker;
select <<heredoc – marker;
print << heredoc -label;
printlist <<heredoc -label;

When are the environment variables created?
Answers:

Each time you run a program
When you save a program
When you compile a program
The first time you run a program
When you run a program in the Unix command shell

Which of the following file functions gets the file descriptor of a file handle?
Answers:

fcntl
flock
getc
fileno
link

What is meant by variable interpolation?
Answers:

Exchanging the values of one variable with anothe
Passing a variable as an argument to a function
The process of making a variable part of the namespace table
The process of assigning some value to a variable
The process of interpreting characters in a string literal surrounded by double quotation marks

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Upwork Perl Test Questions 2023 (Free) Updated

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