Kerala Plus One Answer Key 2023 Computer Science and Information Technology

FIRST YEAR

Kerala Board
Answer Key
2023

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ANSWER KEY
I CODE NO I FY452

FIRST YEAR HIGHER SECONDARY EXAMINATION MARCH 2023

PART II

SUBJECT: COMPUTER SCIENCE AND INFORMATION TECHNOLOGY

_QQ_SCORES _2_HOURS

Qn. Sub Total
Answer Key/Value Points Score
No Qns Score
PART A(Answer five questions)
1 d) HDMI 1 1

2 a) Tokens 1 1

3 d) ?: 1 1

4 a)getO 1 1

5 c) Optical Fiber . 1 1

6 a) Phishing 1 1

PART B(Answer any 11 questions)
7 if(a>b)
l=a;
else
l=b;
8 +,-,/,*,% - explanation (any four) 2 2

9 char, int, float, double, void - explanation (any four) 2 2

10 a 40 1
2
b 11 1
11 Any two difference 1+1 2

12 i islowerO - ctype.h
ii exitt) - stdlib.h
1;2x4 2
iii sqrtt) - math.h
iv strlent) - string.h
13 '\0' - character literal/backslash character literal/escape sequence 1;2
o - integer literal 1;2
2
'0' - character literal 1;2
"0" - string literal 1;2
14 Any four rules - 1;2marks each 1;2x4 2

15 Any four flowchart symbol 1;2x4 2

16 Small and very fast memory in between RAM and processor

17 ASCII -expansion, 7 bit code, can include English alphabets and
symbols(any two)
18 (204)10= (11001100)2
1x2 2
(111011)2=(73)8
19 (i) First - Vacuum tube
Y2
(ii) Second - Transistor
Y2
(iii) Third - Integrated Circuits 2
Y2
(iv) Fourth - Large Scale and Very large Scale Integrated Circuits
Y2

PARTC(Answer any 7 questions)
20 Symbol and truth table of each logic gate 1+1+1 3
21 Any three functions of OS 1+1+1 3
22 Any three difference 1+1+1 3
23 steps 2
3
logic 1
24 ~
Explanation of console functions and stream functions
2 3
Example
1
25
Program structure
1
logic 3
1
selection using if... else statement or switch statement
1
26 Any two difference 2
3
Example 1
27 Any three advantages 1+1+1 3
28 World wide Web, Search Engine, E-mail, Social Media(any three) 1+1+1 3

PART - D(Answer any 3 questions)
29 a Assignment and relational/comparison operator 2
4
b Arithmetic/binary and increment operator/unary operator - use 2
30 De-morgan's theorems(statements only) 2
proof using truth table 1+1 4
31 Program structure 1
array declaration 1
4
input 1
output 1
32 PAN,LAN,MAN,WAN-Explanation 1+1+1+1 4
33 Advantages(any three) 3
4
Disadvantage(anyone) 1

1,,~YI CL. ~
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