The 15 one-mark questions from the March 2020 12th Standard Computer Applications public exam, in paper order, with the correct option marked and a short explanation.
Q1
Write the expansion of MIDI :
- A. Musical Information Digital Interpreter
- B. Musical Instrument Digital Information
- C. Musical Intelligent Digital Interface
- D. Musical Instrument Digital IdentifierCorrect
Explanation. MIDI stands for Musical Instrument Digital Interface. None of the printed options is exactly correct (misprint); option (d) is the closest intended answer, differing only in the last word.
Q2
What is the keyboard shortcut to open a PageMaker file ?
- A. Ctrl + Q
- B. Ctrl + M
- C. Ctrl + NCorrect
- D. Ctrl + X
Explanation. Ctrl + N opens a new PageMaker document (the Tamil version asks for opening a new document). An existing file is opened with Ctrl + O, which is not among the options, so Ctrl + N is the intended answer.
Q3
The horizontal entity in a Table is known as ________.
- A. Key
- B. RecordCorrect
- C. Table
- D. Column
Explanation. A row (horizontal entity) of a table is called a record or tuple; the vertical entity is a column or field.
Q4
Which one of the following is not a DDL command ?
- A. INSERTCorrect
- B. CREATE
- C. ALTER
- D. DROP
Explanation. CREATE, ALTER and DROP define or change the structure of the database (DDL). INSERT adds data into a table, so it is a DML command.
Q5
In PHP, we can use ________ to comment a single line.
- A. /* */
- B. /?
- C. //Correct
- D. #
Explanation. In PHP, // starts a single-line comment, while /* */ encloses multi-line comments. The shell-style # also works for a single line, so the paper has two valid options; // is the standard answer.
Q6
How many types of functions are there in PHP ?
- A. 5
- B. 4
- C. 3Correct
- D. 2
Explanation. The textbook classifies PHP functions into three types: user-defined functions, pre-defined (built-in) functions and parameterized functions.
Q7
What is the output of the following PHP code ?
<?php
$x;
if($x==0)
print "hi";
else
print "how are u";
?>
- A. no output
- B. how are u
- C. hiCorrect
- D. error
Explanation. $x is declared without a value, so it is NULL. In the loose comparison NULL == 0 is true, so the if block runs and prints hi.
Q8
Most complicated looping structure in PHP is ________.
- A. forCorrect
- B. while
- C. do...while
- D. None of these
Explanation. The for loop is considered the most complex loop in PHP because its header combines initialization, condition and increment in one statement.
Q9
________ is a request for data or information from a database table or combination of tables.
- A. Code
- B. QueryCorrect
- C. Form
- D. Report
Explanation. A query is a request to retrieve data or information from one or more database tables, for example a SELECT statement.
Q10
Computer, which is connected to a network is called :
- A. device
- B. nodeCorrect
- C. system
- D. cable
Explanation. Each computer or device connected to a network is called a node.
Q11
What is the expansion of TCP ?
- A. Television Control Protocol
- B. Television Control Program
- C. Transmission Control Program
- D. Transmission Control ProtocolCorrect
Explanation. TCP stands for Transmission Control Protocol, which provides reliable, connection-oriented data transfer.
Q12
In domain name, the sequence of labels are separated by ________.
- A. - (hyphen)
- B. * (Asterisk)
- C. # (Hash)
- D. . (dot)Correct
Explanation. The labels of a domain name are separated by dots, for example www.tn.gov.in.
Q13
www was invented by ________.
- A. John Napier
- B. Tim Berners LeeCorrect
- C. Charles Babbage
- D. Blaise Pascal
Explanation. Tim Berners-Lee invented the World Wide Web in 1989 at CERN.
Q14
Which of the following notation is used to denote IPv4 addresses ?
- A. Binary
- B. Dotted-decimal
- C. Hexadecimal
- D. (a) and (b)Correct
Explanation. An IPv4 address is 32 bits long and can be written in binary notation or in dotted-decimal notation (e.g. 192.168.1.1), so both (a) and (b) are correct. Hexadecimal is used for IPv6.
Q15
Wi-Fi is short name for ________.
- A. Wireless Fiber optic
- B. Wireless FidelityCorrect
- C. Wired Fidelity
- D. Wired Fiber optic
Explanation. Wi-Fi stands for Wireless Fidelity, a wireless LAN technology based on IEEE 802.11.
About this paper
These are the Part I one-mark multiple-choice questions from the March 2020 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.
