Tests

Perl Test

Search Questions:

A directory handle.

is a program that handles your operating system 0.0%

is a link from your computer program to the directory on your file system 100.0%

does not have its own namespace 0.0%

cannot be considered equivalent to a file handle 0.0%

does not require the opendir function 0.0%

A label, in Perl, is.

a marker for the Perl interprete 0.0%

a heading 0.0%

a switch statement 100.0%

the name of an operator 0.0%

a component embedded in the code 0.0%

A scalar variable can contain:

only one data item at a time 100.0%

several data items at a time, the number of which needs to be declared beforehand 0.0%

unlimited items 0.0%

two items at a time 0.0%

an array of data items 0.0%

A scalar variable can contain.

only one data item at a time 100.0%

several data items at a time, the number of which needs to be declared beforehand 0.0%

unlimited items 0.0%

two items at a time 0.0%

an array of data items 0.0%

An atom cannot be

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

an escaped meta-characte 0%

an escaped special meaning characte 0%

a regular expression enclosed in parenthesis 0%

a meta characte 0%

An atom cannot be:

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

an escaped meta-character 0%

an escaped special meaning character 0%

a regular expression enclosed in parenthesis 0%

a meta character 0%

Context in Perl can be:

conditional, referenced, literal, null 0.0%

numeric, string, list, scalar 0.0%

associative, numeric, scalar, sparse 0.0%

inary, string, list, scalar 100.0%

Boolean, numeric, string, null 0.0%

Context in Perl can be.

conditional, referenced, literal, null 0.0%

numeric, string, list, scala 0.0%

associative, numeric, scalar, sparse 0.0%

inary, string, list, scala 100.0%

Boolean, numeric, string, null 0.0%

Dereferencing refers to:

accessing an array that contains a reference to another array 0.0%

removing the reference 0.0%

an undefined or empty reference 0.0%

accessing values referred to by Perl references 100.0%

a scalar variable that keeps track of where another variable is stored in memory 0.0%

Dereferencing refers to.

accessing an array that contains a reference to another array 0%

emoving the reference 0%

an undefined or empty reference 0%

accessing values referred to by Perl references 0%

a scalar variable that keeps track of where another variable is stored in memory 0%

How are hash references created?

% $ reference 0.0%

$ reference = % hash; 100.0%

@ reference = % hash; 0.0%

% hash=$reference; 0.0%

$$reference= % hash; 0.0%

How is an array assigned to an array?

@array1=@array[1...6]; 0.0%

@array1=@array2; 0.0%

@array=(1, "string", 4,5, @ array z); 0.0%

By creating another array object 0.0%

An array cannot be assigned to an array 100.0%

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

Does not allow you to execute statements in a loop 0.0%

At least once 100.0%

Twice 0.0%

Depends on the number of times specified 0.0%

An indefinite number of times 0.0%

Non-associative operators are those that:

do not bind at all 0.0%

change their associativity depending on the context 0.0%

do not show precedence 100.0%

bind themselves to whichever expression they are adjacent to 0.0%

do not associate the lvalue with the expression on the right 0.0%

Non-associative operators are those that.

do not bind at all 0.0%

change their associativity depending on the context 0.0%

do not show precedence 100.0%

ind themselves to whichever expression they are adjacent to 0.0%

do not associate the lvalue with the expression on the right 0.0%

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

Sets the default syntax 0%

Allows the option to be negated 0%

Sets the input option to include a mandatory string argument 0%

Sets the input option to include a mandatory integer argument 0%

Sets the input option to include an optional string argument 0%

Scalar variables can contain:

numeric data 0%

string data 0%

either numeric or string data 0%

null values 0%

Boolean values 0%

Scalar variables can contain.

numeric data 0%

string data 0%

either numeric or string data 0%

null values 0%

Boolean values 0%

The bless operato

creates references to objects that are not named 0%

creates a link between the reference object and the class the object is created within 0%

contains the literal name of another variable 0%

eferences a subroutine 0%

efers to literals 0%

The bless operator:

creates references to objects that are not named 0%

creates a link between the reference object and the class the object is created within 0%

contains the literal name of another variable 0%

references a subroutine 0%

refers to literals 0%

The following code is an example of which switch syntax option? GetOptions("extension:s");

Sets the default syntax 0%

Allows the option to be negated 0%

Sets the input option to include a mandatory string argument 0%

Sets the input option to include a mandatory integer argument 0%

Sets the input option to include an optional string argument 0%

The foreach loop is usually used to process:

arrays and hashes 0%

a block of statements a number of times 0%

lists 0%

multi-dimensional arrays 0%

namespaces 0%

The foreach loop is usually used to process.

arrays and hashes 0%

a block of statements a number of times 0%

lists 0%

multi-dimensional arrays 0%

namespaces 0%

The keyword 'my' is used to declare

comments 0%

are words 0%

default variables 0%

Lexical variables 0%

The s/// function:

substitutes one string for another string 0%

returns the first position of a substring 0%

returns the last position of a substring 0%

returns the number of characters of a string 0%

returns or modifies a substring 0%

The s/// function.

substitutes one string for another string 0%

eturns the first position of a substring 0%

eturns the last position of a substring 0%

eturns the number of characters of a string 0%

eturns or modifies a substring 0%

The syntax of assigning to an array cell is.

array=new Array(n); 0%

scalar=@array[cellIndex] 0%

@array[cellIndex]=scalar; 0%

$array[cellIndex]=scalar; 0%

$array[n]=newArray; 0%

The syntax of the heredoc operator is.

print >>heredoc - marker; 0%

print <<heredoc - marker; 0%

select <<heredoc - marker; 0%

print << heredoc -label; 0%

printlist <<heredoc -label; 0%

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

sort ( ) {$b cmp $a ;} 0%

lvalue=sort list 0%

$ name= ~tr/+/ /; 0%

sortDescending ( ) {$b cmp $a;} 0%

lvalue=sort subroutineName list; 0%

The value assigned to an array cell must be:

a scalar value 0%

a variable value 0%

a scalar or a variable value that resolves to a scalar value 0%

null 0%

None of the above 0%

The value assigned to an array cell must be.

a scalar value 0%

a variable value 0%

a scalar or a variable value that resolves to a scalar value 0%

null 0%

None of the above 0%

To start the Perl debugger, what will you type at the command prompt?

perld 0%

DB<1 0%

perl errorMessage.pl-d 0%

perl -d filename.pl 0%

perl-w programName.pl 0%

What are bare words?

Comments with the # sign missing 0%

Improperly declared variables 0%

Operators 0%

Character strings without surrounding quotation marks 0%

Characters denoting a string 0%

What does @ARGV refer to?

The number of elements in an array 0%

An array loaded with the command-line arguments 0%

A file handle used when processing an array 0%

A file associated with a file handle 0%

The name of your program 0%

What does a print FILEHANDLE list do?

Prints to FILEHANDLE the data in list 0%

Prints the contents of the default special variable $_ to FILEHANDLE 0%

Prints to the default selected file handle the data in list 0%

Prints to the default selected file handle the contents of the default special variable $_ 0%

None of the above 0%

What does Perl stand for?

Programmer's Extraction Report Language 0%

Practical Extra Reference Language 0%

Practical Extraction and Report Language 0%

Practical Evolving Report Language 0%

Practical Error Report Language 0%

What does the abs_path method do?

Gets the current working directory 0%

Gets the absolute path of the paramete 0%

Gets the absolute path of the input paramete 0%

Gets the absolute path of the current working directory 0%

Gets the current paramete 0%

What does the directory function telldir do?

Changes the current directory 0%

Closes a directory handle 0%

Creates a new directory 0%

Opens a directory handle 0%

Gets a directory handle's current byte offset 0%

What does the following compound assignment operator signify? | =

Exclusive OR the expression on the left of the operator with the expression on the right of the operator 0%

Logical OR the expression on the left of the operator with the expression on the right of the operator 0%

Left shift the expression on the left of the operator by the expression on the right of the operator 0%

Binary OR the expression on the left of the operator with the expression on the right of the operator 0%

Append the expression on the left of the operator with the expression on the right of the operator 0%

What does the following error indicate? "Can't Locate Function in @INC"

You misspelled a function name 0%

The last line of the required file returned a zero or null value 0%

You forgot to type the comma after the first argument of a function 0%

Your code is using a function that has been replaced by a newer function 0%

You used an uninitialized value 0%

What does the following syntax indicate? $lvalue=join(delimiter, list);

Creates a single delineated string from an input list 0%

Translates a number into a characte 0%

Returns the first position of a substring 0%

Returns the number of characters in a string 0%

Returns the last position of a substring 0%

What does the following syntax indicate? $lvalue=join(delimiter, list);

Creates a single delineated string from an input list 0%

Translates a number into a character 0%

Returns the first position of a substring 0%

Returns the number of characters in a string 0%

Returns the last position of a substring 0%

What does the ord string function do?

Returns or modifies a sub string 0%

Translates a number into a characte 0%

Creates a delineated string from an input list 0%

Returns the number of characters in a string 0%

Converts ASCII characters into their numeric value 0%

What does the pattern modifier m do?

Ignores the character case when matching the pattern 0%

Compiles the pattern and interprets it only the first time it occurs 0%

Treats the input string as if it were a single line 0%

Treats the input string as if it were multiple lines 0%

Allows a comment character in the pattern 0%

What does the pop function do?

Takes elements off the end of an array 0%

Puts elements into the first cell index of an array 0%

Adds an element to the end of an array 0%

Takes elements off the first index of the array 0%

Modifies or deletes elements from the array 0%

What does the switch syntax :f do?

It allows the option to be negated 0%

It sets the default syntax 0%

It sets the input option to include an optional real-number argument 0%

It sets the input option to include an optional integer argument 0%

It sets the input option to include a mandatory real-number argument 0%

What is meant by variable interpolation?

Exchanging the values of one variable with anothe 0%

Passing a variable as an argument to a function 0%

The process of making a variable part of the namespace table 0%

The process of assigning some value to a variable 0%

The process of interpreting characters in a string literal surrounded by double quotation marks 0%

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

Anonymous array 0%

Anonymous hash 0%

Object reference 0%

Subroutine 0%

Anonymous subroutine 0%

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

Anonymous array 0%

Anonymous hash 0%

Object reference 0%

Subroutine 0%

Anonymous subroutine 0%

What should be the first character of a format code?

+ or - 0%

x 0%

& 0%

% 0%

@ 0%

When are the environment variables created?

Each time you run a program 0%

When you save a program 0%

When you compile a program 0%

The first time you run a program 0%

When you run a program in the Unix command shell 0%

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

font size=5>"</font 0%

font size=5>'</font 0%

font size=5><></font 0%

font size=5><!</font 0%

font size=5>`</font 0%

Which of the following can be used with the do statement?

A label modifie 0%

next 0%

while 0%

edo 0%

last 0%

Which of the following can replace if else?

? : 0%

: ? 0%

! : 0%

/ ? 0%

? / 0%

Which of the following characters denotes a comment in Perl?

// 0%

# 0%

/* 0%

& 0%

* 0%

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

@ 0%

% 0%

$ 0%

* 0%

& 0%

Which of the following executes the continue block of statements before returning execution to the top of the loop?

last 0%

edo 0%

less 0%

next 0%

lu 0%

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

fcntl 0%

flock 0%

getc 0%

fileno 0%

link 0%

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

debug 0%

orde 0%

pass_through 0%

null 0%

error 0%

Which of the following is not a feature of Perl?

Portability 0%

Interpreted language 0%

Compiled language 0%

Is used for CGI applications 0%

Was originally used to generate reports that tracked errors 0%

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

Switches begin with a dash character (-) 0%

Switches that do not take a parameter are set to the value 0 0%

Switches that take a parameter may or may not have space between the switch name and the switch value 0%

Switches are not required to be in any orde 0%

Switches are case-sensitive 0%

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

Direct 0%

Constant 0%

Subroutine 0%

Numeric 0%

Symbolic 0%

Which of the following is not an alignment character?

| 0%

& 0%

# 0%

Which of the following is not true of labels?

A label can go on any line 0%

A label must begin with a character followed by any combination of letters or numbers that end with a colon 0%

Reserved words cannot be used as labels 0%

Labels are case sensitive 0%

A label performs the same function as the last command 0%

Which of the following is not true regarding scalar variable names?

Variable names that begin with an underscore or an alphabet character may have any practical length 0%

The characters that follow variable names that begin with an underscore or alphabet character may be digits, underscores or alphabet characters 0%

If a variable name begins with a digit, it may be of any practical length but can contain only digits 0%

If a variable name begins with a non-alphanumeric character, it can only be one character long 0%

Variable names can contain spaces 0%

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

while 0%

until 0%

do 0%

for / foreach 0%

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

{ } 0%

( ) 0%

* 0%

+ 0%

? 0%

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

Increment/decrement 0%

NOT, escape, sign operator 0%

Dereference operator 0%

Exponential operator 0%

Parenthesis, function, quotation marks 0%

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

+ 0%

| filename 0%

filename | 0%

Which of the following parameters does the printf function take?

An output file handle which is optional 0%

A format string which can include the format codes 0%

The variables to be formatted 0%

All of the above 0%

Does not take any parameters 0%

Which of the following pertains to IO: :Handle?

Base class for IO classes 0%

Interface to file-open functions 0%

Get the file descripto 0%

Interface to IO: : *classes 0%

Export file symbols 0%

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

d 0%

s 0%

c 0%

x 0%

z 0%

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

if 0%

if else 0%

if elsif 0%

if, if else, and if elsif 0%

None of the above 0%

The syntax of assigning to an array cell is:

array=new Array(n);

scalar=@array[cellIndex]

@array[cellIndex]=scalar;

$array[cellIndex]=scalar;

$array[n]=newArray;

The keyword 'my' is used to declare:

comments

words

default variables

Lexical variables

A directory handle:

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