Perl Multiple Choice Questions (MCQs) and Answers

The eval block contained no errors

Perl does not store errors

$@ must be initialized manually

Errors are not supported in Perl

Handles database connections and queries

Parses JSON data

Manages file operations

Creates HTML reports

connect_db

DBI->connect

db_open

start_connection

Automatically raises exceptions on errors

Ignores database errors

Prints database warnings

Disconnects from the database

Commits transactions automatically

Disables transactions

Delays commits

Requires manual commit calls

Opens a file

Connects to a MySQL database

Starts a web server

Creates a new hash

$dbh->query("SELECT * FROM users");

$dbh->execute("SELECT * FROM users");

$dbh->prepare("SELECT * FROM users")->execute();

$dbh->run("SELECT * FROM users");

The module is outdated

The connection parameters are incorrect

Perl does not support databases

The database must be restarted first

The query is missing

Database connection is closed

The SQL statement has syntax errors

Perl does not support SQL

Handling file operations

Generating HTML and handling web requests

Managing database queries

Creating desktop applications

Using print "Content-Type: text/html\n\n";

Using echo "text/html"

Using header("text/html")

Using send_html("text/html")

Retrieves query parameters from a web request

Creates an HTML form

Executes a Perl function

Connects to a database

An HTML page with "Hello, World!" as a heading

A plain text output

A 500 internal server error

Nothing

$user = get("user");

$user = param("user");

$user = $_GET{"user"};

$user = request("user");

The Perl script contains syntax errors

The HTML code is incorrect

CGI does not support Perl

The browser does not support CGI

The CGI module is missing

The script did not receive a name parameter

Perl does not support CGI

param() requires an explicit return type

It improves performance

It forces explicit variable declaration

It automatically fixes syntax errors

It disables warnings

It may delete system files

It can execute arbitrary code if misused

It prevents secure database connections

It slows down execution

Using system() for all commands

Filtering user input and avoiding system() calls

Disabling Perl warnings

Running scripts with root privileges

Improves script speed

Detects security risks in user input

Logs all executed commands

Disables certain functions

use strict;

perl -T script.pl

set_taint_mode();

use warnings;

The script has syntax errors

The script is using tainted user input

Perl does not support -T

The script is missing use warnings;

It causes performance issues

Plain text passwords can be exposed

Perl does not support password storage

It makes scripts slower

Mobile app development

Game development

Text processing and automation

Embedded systems programming

It is used for high-performance computing

It helps in processing genetic sequence data

It controls lab hardware

It is used for 3D modeling

It provides a built-in firewall

It has built-in encryption algorithms

It supports powerful text processing for log analysis

It replaces traditional antivirus software

It reads a log file and filters for errors

It writes error messages to a file

It modifies log files

It creates new log files

By creating databases

By automating HTTP requests and parsing HTML

By generating CSS files

By designing frontend UI

The script has incorrect permissions

The target website structure changed

Perl does not support HTTP requests

The script requires a database connection

Perl does not support ETL operations

The script runs out of memory due to inefficient processing

Perl has a file size limit

Databases do not support Perl scripts