Question Discussion & Solution

The correct answer is (i) only.

Key Points

• CD-R stands for Compact Disk-Recordable.
• CD-RW stands for Compact Disk-ReWritable.
• CD-RW disks are expensive than CD-R disks.
• CD-R (COMPACT DISC – Recordable) is a digital optical disc storage format.
• A CD-R disc is a compact disc that can be written once and read arbitrarily many times.
• CD-R discs (CD-Rs) are readable by most plain CD readers.

Additional Information

• A Compact Disc Recordable (CD-R) is a Write Once Read Multiple (WORM) disc.
• These discs can only record data once and then the data becomes permanent on the disc.
• A Compact Disc Re-Writable (CD-RW) is an erasable disc that can be reused. 
• A CD-R is typically 700 MB of memory.

The correct answer is option 3, i.e. Control unit, arithmetic-logic unit, primary storage​.

Key Points

• The Central Processing Unit (CPU), the principal part of any digital computer system, generally composed of the main memory, control unit, and arithmetic-logic unit.
• It constitutes the physical heart of the entire computer system, it is linked to various peripheral equipment, including input/output devices and auxiliary storage units.
• In modern computers, the CPU is contained on an integrated circuit chip called a microprocessor.

Additional Information 

• The control unit part controls the input and output devices.
• Arithmetic-logic units do basic operations like addition, multiplication, and division. 
• A primary storage device is a medium that holds a memory for a short period of time while a computer is running.

The correct answer is All of the above.

Key Points

• Social engineering is the term used for a broad range of malicious activities accomplished through human interactions.
• It uses psychological manipulation to trick users into making security mistakes or giving away sensitive information. 
• A sniffing attack or a sniffer attack, in the context of network security, corresponds to theft or interception of data by capturing the network traffic using a sniffer.
• Spoofing is the act of disguising a communication from an unknown source as being from a known, trusted source. 

Additional Information

Some Common Hacking Techniques are:

• Phishing
• Bait and Switch Attack
• Key Logger
• Denial of Service (DoS\DDoS) Attacks
• ClickJacking Attacks
• Cookie Theft 

The correct answer is Mailing Tab > Start mail merge group > Start mail.

Key Points

• Mail Merge
  • It consists of combining mail and letters and addressed envelopes or mailing labels for mass mailings from a form letter.
  • This feature is usually employed in a word processing document which contains fixed text and variables.
• Mail Merge is a useful tool that allows you to produce multiple letters, labels, envelopes.
• It also has name tags and more using information stored in a list, database, or spreadsheet.
• When performing a Mail Merge, we will need a Word document.
• We can start with an existing one or create a new one.
• We also need a recipient list, which is typically an Excel workbook or we will create it by selecting the Recipient option.
  • Where we will write the name, address, and mail of each recipient.

Additional Information

• MS Word
  • It is developed by Microsoft.
  • It was released on 25 October 1983 for the first time.
  • It is a graphical word processing program that users can type with.
  • It has helpful tools to make documents, resumes, contracts.
  • This is one of the most commonly used programs under the office suite. 

The correct answer is DE116.

Key Points

• The hexadecimal number system consists of the symbols 0 - 9, A - F.
• Hexadecimal uses decimal numbers and six extra symbols.
• There are no numerical symbols that represent values greater than nine, so letters taken from the English alphabet are used, specifically A, B, C, D, E, and F, where Hexadecimal A = decimal 10, and hexadecimal F = decimal 15.
• A binary number is just a string of zeros and ones: 11011011.
• Three bits, each being on or off, can represent the eight numbers from 0 to 7, this is known as the octal number system.

• Steps to Convert Binary to Hex:
  • ​Start from the least significant bit (LSB) at the right of the binary number and divide it up into groups of 4 digits. (4 digital bits is called a "nibble").
  • Convert each group of 4 binary digits to its equivalent hex value (see table above).
  • Concatenate the results together, giving the total hex number.
•  The binary code is given in question 1101 1110 0001 ⇒ DE1₁₆