The 15 one-mark questions from the Supplementary 2021 12th Standard Computer Applications public exam, in paper order, with the correct option marked and a short explanation.
Q1
Expand JPEG :
- A. Joint Processor Experts Group
- B. Joint Photo Experts Gross
- C. Joint Photographic Expression Group
- D. Joint Photographic Experts GroupCorrect
Explanation. JPEG stands for Joint Photographic Experts Group, the committee that created this compressed image format.
Q2
Match the following :
(1) Text - (i) TGA
(2) Image - (ii) OGG
(3) Audio - (iii) MPEG
(4) Video - (iv) RTF
- A. (1)-(iv), (2)-(i), (3)-(ii), (4)-(iii)Correct
- B. (1)-(i), (2)-(ii), (3)-(iii), (4)-(iv)
- C. (1)-(iii), (2)-(iv), (3)-(i), (4)-(ii)
- D. (1)-(ii), (2)-(iii), (3)-(iv), (4)-(i)
Explanation. RTF is a text format, TGA an image format, OGG an audio format and MPEG a video format, so the matching is (1)-(iv), (2)-(i), (3)-(ii), (4)-(iii).
Q3
A __________ is used for magnifying the particular portion of the area.
- A. Zoom toolCorrect
- B. Text tool
- C. Hand tool
- D. Line tool
Explanation. In PageMaker the Zoom tool magnifies (or reduces) a selected area of the page; the Hand tool only scrolls the view.
Q4
An entity set that does not have enough attributes to form primary key is known as :
- A. Identity set
- B. Strong entity set
- C. Owner set
- D. Weak entity setCorrect
Explanation. A weak entity set lacks attributes to form its own primary key and depends on a strong (owner) entity set for identification.
Q5
In PHP, Default syntax should start with __________ and end with __________.
- A. <?,?>
- B. <php,>
- C. <?php,>
- D. <?php,?>Correct
Explanation. The default PHP syntax opens with <?php and closes with ?>; <? ... ?> is only the short-open-tag form.
Q6
Statement which is used to make choice between two options and only option is to be performed is :
- A. then else statement
- B. if statement
- C. else one statement
- D. if else statementCorrect
Explanation. The if...else statement runs one block when the condition is true and the other block when it is false, so exactly one of the two options is performed.
Q7
PHP supports which types of looping techniques :
- A. while loop
- B. foreach loop
- C. for loop
- D. all the aboveCorrect
Explanation. PHP supports for, while, do...while and foreach loops, so all the listed loops are supported.
Q8
How many parameter are required for MySQLi close function in PHP ?
- A. 3
- B. 1Correct
- C. 5
- D. 2
Explanation. mysqli_close($connection) takes only one parameter: the connection link to be closed.
Q9
A set of computers connecting together is called as __________.
- A. Hub
- B. NetworkCorrect
- C. Node
- D. Server
Explanation. A group of computers connected together to share data and resources is a network; a node is a single device in it.
Q10
Wi-Fi stands for __________.
- A. Wired Optic Fibre
- B. Wireless FidelityCorrect
- C. Wireless Optic Fibre
- D. Wired Fidelity
Explanation. Wi-Fi means Wireless Fidelity, a wireless LAN technology based on IEEE 802.11.
Q11
Which of the following is used to maintain all the directory of domain names ?
- A. Name Space
- B. Domain Name System
- C. IP Address
- D. Domain Name SpaceCorrect
Explanation. The Domain Name Space is the hierarchical tree structure that holds (maintains) the directory of all domain names; DNS is the service that uses it to resolve names to IP addresses.
Q12
If the source code of a software is freely accessible by the public, then it is known as :
- A. Open SourceCorrect
- B. Freeware
- C. Public Source
- D. Firmware
Explanation. Open source software makes its source code freely available for anyone to view, modify and share; freeware is free to use but usually without source code.
Q13
Which of the following is not a tangible goods ?
- A. Medicine
- B. Mobile
- C. Flower bouquet
- D. Mobile AppsCorrect
Explanation. Tangible goods are physical items that can be touched; mobile apps are digital (intangible) goods.
Q14
Which of the following is correctly matched ?
- A. Stored Value Card - Pay later
- B. Credit Cards - Pay before
- C. Smart Card - Pay anytime
- D. Debit Cards - Pay nowCorrect
Explanation. Credit cards are 'pay later', debit cards are 'pay now' (money is taken from the account immediately) and stored value cards are 'pay before'. Only Debit Cards - Pay now is correct.
Q15
Which is the first industry-specific EDI standard ?
- A. Master
- B. TDCCCorrect
- C. ANSI
- D. VISA
Explanation. The first industry-specific EDI standard was published in 1975 by the Transportation Data Coordinating Committee (TDCC) for the transport industry.
About this paper
These are the Part I one-mark multiple-choice questions from the Supplementary 2021 12th Standard Computer Applications public examination conducted by the Tamil Nadu Directorate of Government Examinations. The answers and explanations are prepared by TN Online Test for revision. Each question links to the textbook chapter it comes from, so you can go back to that chapter's notes and MCQs.
