The 15 one-mark questions from the May 2022 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 Exports Gross
- C. Joint Photographic Expression Group
- D. Joint Photographic Experts GroupCorrect
Explanation. JPEG stands for Joint Photographic Experts Group, the committee that created this common compressed image format.
Q2
Character formatting consists of which of the following text properties ?
- A. Italic
- B. Underline
- C. Bold
- D. All of the aboveCorrect
Explanation. Character formatting changes the look of individual characters, such as bold, italic, underline, font and size, so all three listed properties belong to it.
Q3
The ________ diagram gives a logical structure of the database graphically.
- A. Entity - Role
- B. Entity - RelationshipCorrect
- C. Entity - Database
- D. Entity - Key
Explanation. An Entity-Relationship (ER) diagram graphically shows the entities, their attributes and the relationships among them, giving the logical structure of the database.
Q4
What is the default file extension for PHP ?
- A. .phpCorrect
- B. .html
- C. .ph
- D. .xml
Explanation. PHP script files are saved with the default extension .php so that the web server passes them to the PHP interpreter.
Q5
________ stores more than one value of the same data type in single array variable.
- A. Indexed array
- B. ArrayCorrect
- C. Multi-Dimensional array
- D. Function
Explanation. By definition, an array is the concept that stores more than one value of the same data type (homogeneous) in a single array variable; indexed and multi-dimensional arrays are only its types.
Q6
The loop exclusively used for array is ________.
- A. for
- B. While
- C. for eachCorrect
- D. Do while
Explanation. The foreach loop works only on arrays: it takes each element of the array in turn without needing a counter.
Q7
SQL can be expanded as ________.
- A. Script Query Language
- B. Special Query Language
- C. Server Query Language
- D. Structured Query LanguageCorrect
Explanation. SQL stands for Structured Query Language, the standard language used to create, query and manage relational databases.
Q8
Which of the following will be an easy way to use Internet and the public telecommunication system to securely share business’s information with suppliers, partners and customers ?
- A. Arpanet
- B. ExtranetCorrect
- C. Arcnet
- D. Intranet
Explanation. An extranet extends a company’s private network over the Internet so that outside suppliers, partners and customers can securely share its business information; an intranet is for employees only.
Q9
WWW was invented by ________.
- A. Tim Berners LeeCorrect
- B. Blaise Pascal
- C. John Napier
- D. Charles Babbage
Explanation. Tim Berners-Lee invented the World Wide Web in 1989 at CERN; Pascal, Napier and Babbage were pioneers of calculating machines.
Q10
Assertion (A) : The web-sites of the first wave dotcom companies were only in English.
Reason (R) : The dotcom companies of the first wave are mostly American companies.
- A. (A) is true and (R) is false.
- B. Both (A) and (R) are correct and (R) is the correct explanation of (A).Correct
- C. (A) is false and (R) is true.
- D. Both (A) and (R) are correct and (R) is not the correct explanation of (A).
Explanation. Both statements are true: the first wave of dotcom companies were mostly American, which is why their web-sites were only in English, so (R) explains (A).
Q11
Pick the odd one in credit card transaction.
- A. Marketing ManagerCorrect
- B. Card Holder
- C. Acquirer
- D. Merchant
Explanation. The parties in a credit card transaction are the card holder, merchant, acquirer (merchant’s bank), issuer and card network; a marketing manager is not one of them.
Q12
The websites secured by SSL - Secure Socket Layer protocols can be identified using ________.
- A. htmls://
- B. html://
- C. https://Correct
- D. http://
Explanation. Websites protected by SSL use the HTTPS protocol, so their address begins with https:// (usually with a padlock icon in the browser).
Q13
The versions of EDIFACT are also called as ________.
- A. DirectoriesCorrect
- B. Message Types
- C. Folders
- D. Subsets
Explanation. EDIFACT standards are released as versions called directories (for example D.01B), each containing the message types valid for that release.
Q14
PHP is a ________ programming language.
- A. Object side
- B. Client side
- C. File side
- D. Server sideCorrect
Explanation. PHP code runs on the web server, and only the resulting HTML is sent to the browser, so PHP is a server side scripting language.
Q15
Statement which is used to make choice between two options and only option is to be performed is written as :
- A. then else statement
- B. if statement
- C. else one statement
- D. if else statementCorrect
Explanation. The if...else statement tests a condition and executes exactly one of two blocks: the if block when true, the else block when false.
