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G.C.E. (A/L) Examination
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Grade 12 (A/L) 2024 Part – I Time:3 hours
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Instructions: Part I
❖ Answer all questions
❖ Write down your index number on the space provided.
❖ In each of the questions 1 to 30, pick one of the alternatives (1),(2),(3),(4),(5) which is correct or most
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appropriate. Mark a cross (X) on the number corresponding to your choice in the answer sheet provided.
❖ No use of calculators.
1. One of the principal inventors of the “ENIAC” was
(1) John Von Neumann (2) Blaise Pascal (3) Charles Babbage
(4) Ada Augusta Lovelace (5) John Presper Eckert
2. What is the technology used in third generation computers?
(1) Vacuum tubes (2) Transistors (3) Integrated circuits
(4) VLSI (Very Large-Scale Integrated Circuits) (5) Micro processor
3. Consider the following computer memory types.
A – Random Access Memory
B – Cache Memory
C – Flash Memory
D – Registers
E – Read Only Memory
Which of the above are non-volatile memory types?
(1) A only (2) E only (3) C only
(4) C and E only (5) A, B, C and D only
4. Which of the following components is located outside the microprocessor?
(1) Arithmetic Logic Unit (ALU) (2) RAM (3) Control Unit
(4) Register (5) Level 1 cache memory
5. Which of the following is not a typical use of the Random Access Memory (RAM) of a personal
computer?
(1) Keeping data for processing. (2) Holding instructions for operations.
(3) Providing storage for operating system. (4) Retaining information for output.
(5) Keeping the BIOS program for boot-up.
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6. The content stored in ……………………… is read by using the optical technology.
Which of the following answers is the most appropriate to fill the blank in the above statement?
(1) Flah Memory (2) Floppy Disk (3) Magnetic Tape
(4) Compact Disk (5) Hard Disk
7. The most significant digit (MSD) and the least significant digit (LSD) of the number 023.0750 are
respectively.
(1) 0 and 0 (2) 2 and 0 (3) 2 and 5
(4) 0 and 5 (5) 3 and0
8. What is the correct 2’s complement binary representation of decimal -6310 using 8-bits?
(1) 00111111 (2) 11000001 (3) 11000010
(4) 10100000 (5) 11000010
9. What is the correct result of bit-wise AND operation between the two binary numbers 101010012
and 111011012 ?
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(1) 11101101 (2) 11101011 (3) 10010110
(4) 10101001 (5) 10011101
10. What is the correct decimal equivalent of hexadecimal FB.816 ?
(1) 251.510 (2) 240.12510 (3) 243.2510
(4) 11.37510 (5) 251.12510
11. What is the binary equivalent to decimal 97.312510?
(1) 1100001.0011 (2) 1000001.0111 (3) 1100001.0101
(4) 1100001.1010 (5) 1100001.0110
12. Which of the following are equivalent to hexadecimal number 3A7416?
A- 1010 0111 01002
B- 267610
C- 25648
(1) A only (2) A and B only (3) A and C only
(4) B and C only (5) All A, B and C
13. Which of the following is the equivalent Boolean expression to AB + AC̅ + BC̅ .
̅ BC + AB
(1) A ̅C + ABC̅ + ABC ̅C̅ + A
(2) AB ̅ BC̅ + A
̅B̅C ̅ BC + AB
(3) A ̅C + ABC̅ + ABC
(4) AB̅C̅ + ABC̅ + A
̅ BC̅ + ABC ̅C̅ + ABC̅ + A
(5) AB ̅ BC̅ + ABC+ A
̅B̅C
̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅
𝐀 + 𝐁. 𝐂 + ̅̅̅̅̅
14. Which of the following is equivalent to f(A,B,C) = ̅̅̅̅̅̅̅̅̅̅̅ 𝐀𝐁̅ after simplifying following
Boolean statement by using De Morgan’s theorem.
̅ + BC
(1) A ̅ +C
(2) AB (3) A̅+B ̅
(4) AB (5) B̅+C
2 G.C.E. (A/L) ICT 2024 Gr. 12 – February/2024 FWC
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15. The logic expression relevant to the output of the given truth table is.
A B Output
0 0 0
0 1 1
1 0 1
1 1 0
(1) A + B (2) A . B (3) ̅̅̅̅̅̅̅̅̅
A + B (4) A⊕B (5) ̅̅̅̅̅̅̅̅
A⊕B
16. Consider the following logic circuit diagram.
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Which of the following Boolean logic is equivalent to the output Q of the logic circuit given above?
(1) OR (2) AND (3) XNOR (4) NOT (5) XOR
17. A SR flip-flop is constructed using two NAND gates.
S R Q ̅
𝐐
Initially 1 0 1 0
S change to 0 0 0 a b
R change to 1 0 1 c d
R change to 0 0 0 0 1
What should be the values of a, b, c, d respectively in the truth table for the above SR flip-flop?
(1) a=0, b=1, c=1, d=0 (2) a=1, b=0, c=0, d=1 (3) a=1, b=1, c=1, d=1
(4) a=0, b=1, c=0, d=1 (5) a=1, b=0, c=0, d=0
18. Consider the following statements about the main function of an operating system.
A – Memory Management
B – Process Scheduling
C – File Handling
D – Virus Detection
E – User Interface
Which of the above statement/s is/are true.
(1) A and B only (2) B and D only (3) A, B and C only
(4) A, B and D only (5) A, B, C and E only
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19. Which of the following is usually used to boot-up persona computers?
(1) Firmware (2) Malware (3) Adware
(4) Ransomware (5) Liveware
20. Through which of the following, will a device controller that controls a device deal with the
operating system?
(1) Application Software (2) Assembler (3) Compiler
(4) Device Driver (5) Utility Software
21. Consider the following statements.
A – DHCP server in an IP network dynamically allocate IP address to network devices.
B – DNS server translates domain names to IP address.
C – Proxy server caches the recently accessed web pages.
Which of the above statement/s is/are correct.
(1) A only (2) B only (3) A and B only
(4) A and C only (5) All A, B and C
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22. TCP/IP computer networks. Transport Protocol Data Unit (TPDU) is referred as a:
(1) Packet (2) Frame (3) Segment
(4) Window (5) Message
23. ………………………… is used for analog signal to digital signal conversion.
Which of the following is most appropriate to fill the blank in the above statement?
(1) Amplitude Modulation – AM (2) Frequency Modulation – FM
(3) Time Division Modulation – TDM (4) Phase Modulation – PM
(5) Pulse Code Modulation – PCM
24. Which of the following is a possible IP address in a network with IP address 172.16.50.100 and
Subnet mask 255.255.240.0?
(1) 172.16.50.0 (2) 172.16.48.0 (3) 172.16.0.0
(4) 172.16.32.0 (5) 172.16.16.0
25. A computer in a network is configured with the IP address 192.168.50.145 and the subnet mask
255.255.255.224. Which of the following IP address cannot be assigned to a computer in the same
network?
((1) 192.168.50.130 (2) 192.168.50.135 (3) 192.168.50.159
(4) 192.168.50.150 (5) 192.168.50.158
26. Which of the following is considered as an erroneously received byte in an odd parity system?
(1) 01010111 (2) 10010010 (3) 10110011
(4) 11001001 (5) 11010110
27. Which of the following shows the correct order of software testing?
(1) Acceptance testing, System testing, Integration testing, Unit testing
(2) Unit testing, Acceptance testing, System testing, Integration testing
(3) Unit testing, Integration testing, Acceptance testing, System testing
(4) Unit testing, Integration testing, System testing, Acceptance testing
(5) Whitebox testing, Blackbox testing, System testing, Unit testing
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28. Which of the following feasibility types is generally not carried out during the development of a
system to be used only in-house?
(1) Economic feasibility
(2) Market feasibility
(3) Operational feasibility
(4) Organizational feasibility
(5) Technical feasibility
29. Consider the following system implementation methods:
A – Direct B – Phase C – Parallel
Which of the above methods can be recommended to implement an emergency call handling system?
(1) A only (2) B only (3) C only
(4) A and B only (5) A and C only
30. Consider the following statements regarding the requirements of Bank ATM:
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A – A customer shall be able to inquire his/her bank balance.
B – A customer should be able to deposit money through ATM.
C – Maximum withdrawal amount per day is Rs. 100,000.
Which of the above requirements is/are functional requirement(s) of the ATM.
(1) A only (2) B only (3) C only
(4) A and B only (5) A and C only
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