Question Discussion & Solution

The correct answer is HTTPS.

• HTTPS(HyperText Transfer Protocol Secure): is an application layer protocol and used for secure communication over the internet.

Additional Information

• HTTP (HyperText Transfer Protocol): is an application layer protocol designed to transfer information between networked devices and runs on top of other layers of the network protocol stack. HTTP involves a client machine making a request to a server, which then sends a response message and communication between web browsers and web servers. HTTP is a stateless protocol.
• SMTP (Simple Mail Transfer Protocol): is an application layer protocol and used to send emails over the internet. SMTP is a state-full protocol.
• TCP/IP (Transmission Control Protocol/ Internet Protocol) is the communication protocol is used by the internet and used to interconnect network devices on the internet. Its routing function enables internetworking and essentially establishes the Internet.
• TCP is responsible for the data delivery of a packet and IP is responsible for the logical addressing. 
• FTP (File Transfer Protocol):  is an application layer protocol and used to exchange files on the internet and copy large files from a remote computer to the requesters' computer.

The devices which send data or control signals to the computer or processing unit are known as Input devices.

• Examples of input devices are- Mouse, Keyboard, Microphone, Scanner, Joystick, etc.
• From the given options, Joystick, scanner, and Keyboard are input devices. 
• The scanner is an input device used for direct data entry from the source document into the computer system.
• It converts the document image into digital form so that it can be fed into the computer. 
• The keyboard is the device that is used to enter all the data into the computer. 
• It directs the computer through instructions.
• Normally the keyboard has 104 buttons called the keys.

Hence, only a printer is not an input device, it is an output device.

Printer:

• A printer is basically an output device that prints a hard copy of the electronic data that is stored in the computer or any other device.
• The electronic data may include documents, text, images, or even the combination of all three.
• Particular printers are available for printing particular data types.

Hence, a printer is the correct answer here.

The correct answer is Trap doors.

The Trap doors are code that recognizes some special sequence of input or is triggered by being run from a certain user ID by an unlikely sequence of events.

Key Points

• Trap Door:
  • A trap door is a secret entry point into a program that allows anyone to gain access to any system without going through the usual security access procedures.
  • It is a method of bypassing normal authentication methods.
  • Hence it is also known as a back door.
  • It is used by the Programmers to debug and test programs. 
  • It can become a threat when any dishonest programmers gain illegal access. 

Additional Information

• A standalone malicious program that may give full control of an infected PC to another PC is called Trojan horse.
• A logic bomb is a small code that is intentionally inserted into a software system and will set off a malicious function when specified conditions are met. 
• A virus is a computer program that can change and replicates itself by modifying other computer programs and inserting its own code. 

The correct answer is the Date picker.

Key Points

• A Date picker is a mini-calendar from which data - entry clerks can enter a date.
• ​The date picker allows users to enter a date either through text input or by choosing a date from the calendar.
• The date picker is made up of several components, directives, and the date implementation module that work together.
• A data entry clerk is a member of staff employed to enter or update data into a computer system. Data is often entered into a computer from paper documents using a keyboard.

​Additional Information

The correct answer is Versatility, Diligence.

Key Points

• Versatility is the characteristic of a computer to perform completely different types of work at the same time, whereas diligence makes it to work for hours without boredom or tiredness. 
• Versatility means the capacity of the computer of performing more than one task at the same time.
• Diligence is the capacity of the computer of performing repetitive tasks without getting tired.
• A computer is free from tiredness, lack of concentration, fatigue, etc therefore it can work for hours without creating any errors.

Additional Information

Characteristics of Computer System are:

• Speed - A computer works with much higher speed and accuracy compared to humans while performing mathematical calculations. 
• Accuracy - Computers perform calculations with 100% accuracy. 
• Diligence - A computer can perform millions of tasks or calculations with the same consistency and accuracy. 
• Versatility
• Reliability
• Memory