IGCSE Theory

Select the true statement about an operating system (OS)?

• (1) An OS controls peripheral, allocates memory and organises data into fields and records.

• (2) An OS provides protection against viruses and controls peripherals.

• (3) An OS controls peripheral, and allocates memory and processor time.

• (4) An OS controls the processor and peripherals and allows the user to connect to the internet

Which of the following is a type of malware intentionally inserted into a software system that will set off a malicious function when specified conditions are met?

• Worm

• Trojan

• Spyware

• Logic bomb

Which of the following statements(s) is/are true in respect of wireless technology?

P: Bluetooth is a wireless technology which can be used to connect a headset to a mobile phone.

Q: Bluetooth is a long-range wireless technology and is a low cost means of data transfer.

• P

• Q

• P AND Q

• Neither P or Q

Which of the following file format is not a video file format?

• .AVI

• .MOV

• .MP4

• .JPEG

SMTP is an acronym for:

• 1) Simple Mail Transport Protocol

• 2) Simple Mail Terminal Protocol

• 3) Simple Mail Transfer Protocol

• 4) Simple Mail Transition Protocol

A computer has a main memory of 960 Kbytes. What is the exact number of bytes contained in this

memory?

• (1) 960 × 8

• (2) 960 × 1000

• (3) 960 × 1024

• (4) 960 × 1024 × 1024

The convenient place to store contact information for quick retrieval in e-mail is:

• (1) Address box

• (2) Message box

• (3) Spam Box

• (4) Drafts Box

Why would BCC: be used in an e-mail?

• 1) BCC: allows the recipient to identify all the other recipients in the list when a group email address is used.

• 2) BCC: allows the sender to indicate who the email is for if there is more than one recipient.

• 3) BCC: allows the sender of a message to conceal the recipient entered in the BCC: field from the other recipients.

• 4) BCC: allows recipients to be visible to all other recipients of the message.

Jatin’s laptop has an LCD screen. The acronym LCD stands for:

• Light Crystal Display

• Liquid Compact Display

• Light Compact Display

• Liquid Crystal Display

With respect to computers, which one of the following best describes phishing?

• A malicious program installed on a system that stays concealed to avoid detection.

• A method of bypassing normal authentication procedures over a connection to a network.

• A type of unsolicited bulk email of identical messages sent to numerous recipients.

• An attempt to acquire sensitive information for malicious reasons, by masquerading as a trustworthy entity.