2019 · Paper 1

AGA KHAN UNIVERSITY EXAMINATION BOARD

SECONDARY SCHOOL CERTIFICATE

CLASS X

ANNUAL EXAMINATIONS (THEORY) 2019

Physics Paper I

Time: 1 hour 10 minutes Marks: 40

INSTRUCTIONS

Please read the following instructions carefully.

Read each question carefully.
Answer the questions on the separate answer sheet provided. DO NOT write your answers on the question paper.
There are 100 answer numbers on the answer sheet. Use answer numbers 1 to 40 only.
In each question there are four choices A, B, C, D. Choose ONE. On the answer grid black out the circle for your choice with a pencil.
If you want to change your answer, ERASE the first answer completely with a rubber, before blacking out a new circle.
DO NOT write anything in the answer grid. The computer only records what is in the circles.
You may use a simple calculator if you wish.

Physics Paper I • CLASS X (2019)Total 25 Examination Items • SLO Mapped

Q.1.

The device between a computer and a telephone line which performs both analog to digital and digital to analog conversions of data is called

Out of 2025 SyllabusCognitive Level: Understanding

hub.

modem.

modulator.

demodulator.

Q.2.

Trojan horse is often used for unauthorised access to data by a/ an

Out of 2025 SyllabusCognitive Level: Knowledge

hacker.

operator.

programmer.

administrator.

Q.3.

Which of the following is FALSE about robots?

2025 Syllabus: SLO 11.1.2 • Data and Analysis ↗Cognitive Level: Understanding

2025 SLO Outcome (11.1.2): analyse the impact, scope, and emerging trends of Artificial Intelligence (AI) in the following fields: a. AI engineering, b. robotics, c. military and aviation, d. mechanical engineering, e. AI-assisted surgery;

They must be able to move.

They consist of only software.

They can perform repetitive tasks.

They can work for long periods of time.

Q.4.

'Omar submitted a report to his professor. While going through Omar's report, his professor noticed that few parts of the report were taken from a book and no reference was mentioned in the report.'

This given situation is an example of

2025 Syllabus: SLO 12.1.3 • Security, Privacy and Data Integrity ↗Cognitive Level: Understanding

2025 SLO Outcome (12.1.3): explain key concepts of copyright, plagiarism, and piracy;

plagiarism.

debugging.

automata.

hacking.

Q.5.

The hardware or software which monitors the incoming and outgoing network traffic (data) based on some predefined criteria is known as

Out of 2025 SyllabusCognitive Level: Knowledge

modem.

firewall.

anti-virus.

user login.

Q.6.

Study the given flowchart.

If the input value is 10 for this flowchart, then the output value is

2025 Syllabus: SLO 9.1.2 • Computational Thinking and Algorithm ↗Cognitive Level: Application

2025 SLO Outcome (9.1.2): draw flowcharts related to SLO # 9.1.1.

Q.7.

The CORRECT sequence of steps of an algorithm to calculate the average of three numbers is

Option A	Option B
1. Input the values of three numbers<br>2. Divide the sum of three numbers by 3 to get average value<br>3. Add the values of three numbers<br>4. Output the average value	1. Input the values of three numbers<br>2. Add the values of three numbers<br>3. Divide the sum of three numbers by 3 to get average value<br>4. Output the average value

Option C	Option D
1. Input the values of three numbers<br>2. Divide the sum of three numbers by 3 to get average value<br>3. Output the average value<br>4. Add the values of three numbers	1. Input the values of three numbers<br>2. Add the values of three numbers<br>3. Output the average value<br>4. Divide the sum of three numbers by 3 to get average value

2025 Syllabus: SLO 9.1.1 • Computational Thinking and Algorithm ↗Cognitive Level: Application

2025 SLO Outcome (9.1.1): write algorithms to address the following types of problems: a. conditional algorithm (I. if, II. nested if, III. if else, IV. else if, V. switch), b. iteration algorithm (I. for, II. while, III. do-while, IV. nested loops), c. searching algorithm (I. linear, II. binary), d. sorting algorithm (I. selection, II. bubble);

1. Input three numbers -> 2. Divide sum by 3 -> 3. Add three numbers -> 4. Output average

1. Input the values of three numbers -> 2. Add the values of three numbers -> 3. Divide the sum of three numbers by 3 to get average value -> 4. Output the average value

1. Input three numbers -> 2. Divide sum by 3 -> 3. Output average -> 4. Add three numbers

1. Input three numbers -> 2. Add three numbers -> 3. Output average -> 4. Divide sum by 3

Q.8.

The detailed description of a program's algorithm, design, coding method, testing and proper usage are provided by the

Out of 2025 SyllabusCognitive Level: Knowledge

debugger.

pseudocode.

documentation.

implementation.

Q.9.

A logical error in a program is detected by

2025 Syllabus: SLO 10.1.1 • Programming in JavaScript ↗Cognitive Level: Knowledge

2025 SLO Outcome (10.1.1): differentiate between program syntax and program semantics;

a compiler.

an assembler.

running test data.

rewriting the program.

Q.10.

The GW-BASIC statement that outputs 1 upon its execution is

2025 Syllabus: SLO 10.3.5 • Programming in JavaScript ↗Cognitive Level: Application

2025 SLO Outcome (10.3.5): use the following logical operators in a JavaScript code: a. AND (&&), b. OR (||), c. NOT (!);

PRINT ((0 OR 0) OR 1)

PRINT ((1 OR 1) AND 0)

PRINT ((0 OR 0) AND 1)

PRINT ((1 AND 1) AND 0)

Q.11.

The CORRECT syntax of LET statement in GW-BASIC is

Out of 2025 SyllabusCognitive Level: Understanding

Line# LET expression = variable

Line# LET variable = expression

Line# expression LET = variable

Line# variable LET = expression

Q.12.

The given GW-BASIC program adds values of A and B and outputs their sum on screen. However, there is/ are some error(s) in it. The number of error(s) in the given GW-BASIC program is/ are

BASICSource Code

10 LET A = 10 B = 20
20 ? A B
30 END

Out of 2025 SyllabusCognitive Level: Application

Q.13.

The GW-BASIC program that outputs PASSWORD ten times on screen is

Option A	Option B
`10 FOR X = 0 TO 10`<br>`20 PRINT "PASSWORD"`<br>`30 X = X + 1`<br>`40 NEXT`<br>`50 END`	`10 FOR X = 0 TO 10`<br>`20 PRINT "PASSWORD"`<br>`30 NEXT`<br>`40 END`

Option C	Option D
`10 FOR X = 1 TO 10`<br>`20 PRINT "PASSWORD"`<br>`30 X = X + 1`<br>`40 NEXT`<br>`50 END`	`10 FOR X = 1 TO 10`<br>`20 PRINT "PASSWORD"`<br>`30 NEXT`<br>`40 END`

2025 Syllabus: SLO 10.5.3 • Programming in JavaScript ↗Cognitive Level: Application

2025 SLO Outcome (10.5.3): write JavaScript code to implement the following loops: a. for loop, b. while loop, c. do while loop, d. nested loop;

10 FOR X = 0 TO 10 / 20 PRINT "PASSWORD" / 30 X = X + 1 / 40 NEXT / 50 END

10 FOR X = 0 TO 10 / 20 PRINT "PASSWORD" / 30 NEXT / 40 END

10 FOR X = 1 TO 10 / 20 PRINT "PASSWORD" / 30 X = X + 1 / 40 NEXT / 50 END

10 FOR X = 1 TO 10 / 20 PRINT "PASSWORD" / 30 NEXT / 40 END

Q.14.

Read the THREE given scenarios.

I.A GW-BASIC program that inputs weight values until a negative value is entered.

II.A GW-BASIC program that inputs temperature once in a day for a week.

III.A GW-BASIC program that inputs number and stops only when 0 is given as input.

The CORRECT categorisation of these scenarios according to the FOR…NEXT and WHILE…WEND loops is

Option	FOR…NEXT	WHILE…WEND
A	I, II and III	None
B	None	I, II and III
C	I and III	II
D	II	I and III

2025 Syllabus: SLO 10.5.1 • Programming in JavaScript ↗Cognitive Level: Application

2025 SLO Outcome (10.5.1): describe loop and its different types;

FOR…NEXT: I, II and III | WHILE…WEND: None

FOR…NEXT: None | WHILE…WEND: I, II and III

FOR…NEXT: I and III | WHILE…WEND: II

FOR…NEXT: II | WHILE…WEND: I and III

Q.15.

Read the given GW-BASIC program.

BASICSource Code

10 J = 10
20 IF J < 20 THEN PRINT "YES"
30 PRINT "NO"
40 END

The output of this GW-BASIC program is

2025 Syllabus: SLO 10.5.4 • Programming in JavaScript ↗Cognitive Level: Application

2025 SLO Outcome (10.5.4): write the output of a given program having a loop and selection structures;

YES

YES NO

Error: Else is Missing

Q.16.

Read the given GW-BASIC program.

BASICSource Code

10 INPUT A, B, N
20 ON N GOTO 30, 40
30 PRINT A + B: END
40 PRINT A * B: END

The value of N due to which this program performs the multiplication of A and B is

Out of 2025 SyllabusCognitive Level: Application

Q.17.

Consider the GW-BASIC code given below.

BASICSource Code

10 X = 0
20 WHILE X <= 20
30 PRINT X
40 X = X + 3
50 WEND
60 END

The output of this code will be

2025 Syllabus: SLO 10.5.4 • Programming in JavaScript ↗Cognitive Level: Application

2025 SLO Outcome (10.5.4): write the output of a given program having a loop and selection structures;

3, 6, 9, 12, 15, 18

0, 3, 6, 9, 12, 15, 18

Q.18.

Which of the following is FALSE about arrays in GW-BASIC?

2025 Syllabus: SLO 10.6.1 • Programming in JavaScript ↗Cognitive Level: Understanding

2025 SLO Outcome (10.6.1): explain the array concerning the array name, size, index number, and arrangement of elements in the memory;

An array is defined by using the DIM statement.

The index number of arrays always starts with 1.

One dimensional array is also called linear array.

Two dimensional arrays consist of rows and columns.

Q.19.

The CORRECT GW-BASIC code line that would print '2' on output screen is

Out of 2025 SyllabusCognitive Level: Application

PRINT INT(2.99)

PRINT SQR(2.99)

PRINT LEN(2.99)

PRINT SPC(2.99)

Q.20.

The CORRECT GW-BASIC command to draw a circle on screen is

Out of 2025 SyllabusCognitive Level: Application

(CIRCLE) 150, 150, 50

(CIRCLE 150, 150, 50)

CIRCLE(150, 150, 50)

CIRCLE(150, 150), 50

Q.21.

Read the given GW-BASIC code.

BASICSource Code

10 A = 10
20 B = 20
50 PRINT A + B
30 PRINT A - B
40 PRINT A * B
60 END

The output of this GW-BASIC code in CORRECT sequence is

2025 Syllabus: SLO 10.3.1 • Programming in JavaScript ↗Cognitive Level: Application

2025 SLO Outcome (10.3.1): write a JavaScript program to solve arithmetic problems by using arithmetic operators;

-10, 200, 30

200, 30, -10

30, -10, 200

-10, 30, 200

Q.22.

If X = 35 and Y = 2, then the given GW-BASIC statement outputs

BASICSource Code

PRINT 6 + X / 7 * Y

2025 Syllabus: SLO 10.3.8 • Programming in JavaScript ↗Cognitive Level: Application

2025 SLO Outcome (10.3.8): simplify an expression by using the order of precedence of operators;

11.71

6 + X / 7 * Y

6 + 35 / 7 * 2

Q.23.

Read the GW-BASIC code given below.

BASICSource Code

10 A = 10
20 B = 20
30 C = 30
40 
50 PRINT "The Average is:", AVG

This code is required to calculate the average of three values. Which of the following statements should be placed in Line 40 to CORRECTLY complete the program?

2025 Syllabus: SLO 10.3.8 • Programming in JavaScript ↗Cognitive Level: Application

2025 SLO Outcome (10.3.8): simplify an expression by using the order of precedence of operators;

AVG = A + B + C / 3

AVG = (A + B + C) / 3

AVERAGE = A + B + C / 3

AVERAGE = (A + B + C) / 3

Q.24.

The truth tables of 1, 2, 3 and 4 Boolean variables give two, four, eight and sixteen output values respectively.

If n is the number of Boolean variables, then the expression to get the number of output values is

Out of 2025 SyllabusCognitive Level: Application

2^n

n^2

n^(2n)

Q.25.

The output of the given Boolean expression NOT(X) . (Y + NOT(Z)) is 1 if the values of X, Y and Z respectively are

Out of 2025 SyllabusCognitive Level: Application

X = 1, Y = 1 and Z = 1

X = 1, Y = 0 and Z = 1

X = 0, Y = 0 and Z = 1

X = 0, Y = 0 and Z = 0

S2502-1721110END OF PAPERPhysics Paper I

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