Engineering Knowledge Test - Computer Science
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Questions and Answers

When data from multiple sources needs to be transmitted over a single line, which logic circuit is typically used?

  • Encoder
  • Demultiplexer
  • Decoder
  • Multiplexer (correct)

    • The particles thought to be responsible for binding nucleons together are:

  • Positrons
  • Electrons
  • Mesons (correct)
  • Neutrons

    • Which type of memory requires frequent refreshing to retain its data?

  • ROM
  • Static RAM
  • Dynamic RAM (correct)
  • EPROM

    • The register that holds the instruction currently being executed is called the:

    <p>Instruction Register (A)</p> Signup and view all the answers

    For a voltage to exert an influence on current, the circuit must be:

    <p>Closed (D)</p> Signup and view all the answers

    A hard disk's circular tracks are further divided into:

    <p>Sectors (C)</p> Signup and view all the answers

    If a voltage is doubled and the current through a resistor also doubles, it indicates that:

    <p>The resistor value did not change (A)</p> Signup and view all the answers

    Which of these pairs contains physical quantities that do NOT have identical dimensions?

    <p>Force and rate of change of linear Momentum (A)</p> Signup and view all the answers

    Which components are directly involved in the execution of an instruction by the CPU?

    <p>control unit and ALU (B)</p> Signup and view all the answers

    If an input signal of 10100 is applied to a NOT gate, what is the output signal?

    <p>01011 (C)</p> Signup and view all the answers

    What device allows frames from one LAN to be transmitted to another LAN?

    <p>Router (A)</p> Signup and view all the answers

    Which of these services rely on the TCP protocol?

    <p>SMTP, HTTP, and FTP (B)</p> Signup and view all the answers

    What is the binary equivalent of the decimal number 61?

    <p>110011 (B)</p> Signup and view all the answers

    Which transmission medium typically has the slowest data transfer speeds?

    <p>Twisted-pair wire (D)</p> Signup and view all the answers

    What is the term for a medium used to transfer data between two locations?

    <p>Communication channel (D)</p> Signup and view all the answers

    What is the primary function of the CPU?

    <p>Read, interpret and process information and instructions (D)</p> Signup and view all the answers

    What technique allows an operating system to execute multiple programs concurrently by switching between them?

    <p>Multitasking (B)</p> Signup and view all the answers

    What does a computer program primarily consist of?

    <p>Algorithms written in computer's language (A)</p> Signup and view all the answers

    Which type of adder processes bits of the operands one after another?

    <p>Serial adder (C)</p> Signup and view all the answers

    What component is used to hold the ROM, RAM, CPU, and expansion cards?

    <p>Motherboard (B)</p> Signup and view all the answers

    Which element is considered the most electronegative?

    <p>Fluorine (C)</p> Signup and view all the answers

    Which of the following is NOT emitted by radioactive substances?

    <p>Electrons (B)</p> Signup and view all the answers

    What is the most abundant rare gas found in the atmosphere?

    <p>Argon (A)</p> Signup and view all the answers

    Which resistive component is designed to be temperature-sensitive?

    <p>Thermistor (A)</p> Signup and view all the answers

    To attenuate high frequencies in a circuit, which component should be used?

    <p>Inductance (B)</p> Signup and view all the answers

    If the resistance in a circuit with constant voltage increases, what happens to the current?

    <p>Decrease (A)</p> Signup and view all the answers

    Which flavor of Network Address Translation allows multiple users to connect to the global Internet using one IP address?

    <p>PAT (D)</p> Signup and view all the answers

    Which programming language is most suited for structured programming?

    <p>PASCAL (A)</p> Signup and view all the answers

    What is the next number in the series 1, 3, 11, 19, 37, _____?

    <p>56 (B)</p> Signup and view all the answers

    What are the two main types of access control lists (ACLs)?

    <p>Standard and Extended (C)</p> Signup and view all the answers

    What is the probability that the minimum face value is not less than 2 and the maximum face value is not greater than 5 when rolling an unbiased die four times?

    <p>16/81 (C)</p> Signup and view all the answers

    What defines a stub network?

    <p>A network that has only one entry and exit point. (B)</p> Signup and view all the answers

    How long is a standard IPv6 address?

    <p>128 bits (A)</p> Signup and view all the answers

    What type of value does the projection of a vector on another vector yield?

    <p>Scalar (D)</p> Signup and view all the answers

    What is the probability that all three apply for the same house?

    <p>1/9 (C)</p> Signup and view all the answers

    What does ASCII stand for?

    <p>American Standard Code for Information Interchange (B)</p> Signup and view all the answers

    What logic function is obtained by adding an inverter to the inputs of an AND gate?

    <p>NAND (A)</p> Signup and view all the answers

    Which of the following can be valid host IDs on the LAN interface attached to the router with IP address 172.16.2.1/23?

    <p>172.16.1.100 (A), 172.16.2.255 (D)</p> Signup and view all the answers

    The time required for the fetching and execution of one simple machine instruction is known as?

    <p>CPU cycle (C)</p> Signup and view all the answers

    What is the computer memory that does not forget?

    <p>ROM (A), NVRAM (C)</p> Signup and view all the answers

    Which of the following is not a logical database structure?

    <p>Chain (D)</p> Signup and view all the answers

    What is a program that converts computer data into some code system other than the normal one called?

    <p>Encoder (C)</p> Signup and view all the answers

    Flashcards

    NAT

    Network Address Translation allows multiple users to share one IP address.

    Dynamic NAT

    A type of NAT that assigns IP addresses from a pool to users as needed.

    Structured Programming

    A programming paradigm aimed at improving clarity and quality using structured control flow.

    Access Control Lists (ACLs)

    Lists that control network access, mainly Standard and Extended types.

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    Stub Network

    A network with only one entry and exit point, typically has no other paths.

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    IPv6 Address Length

    An IPv6 address is 128 bits long, allowing for a larger number of unique IPs.

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    Vector Projection

    The projection of a vector onto another vector resulting in a scalar or vector.

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    Probability with Die

    Calculating outcomes from rolling an unbiased die and analyzing face values.

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    NOT gate function

    The NOT gate inverts the input signal A. For A=10100, output is 01011.

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    Router

    A device that forwards data packets between computer networks, enabling communication between different LANs.

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    TCP services

    Services like SMTP, HTTP, and FTP use TCP for reliable transmission of data.

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    Binary conversion

    The decimal number 6110 converts to binary as 11001110110.

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    Transmission speeds

    Twisted-pair wire has the slowest transmission speeds compared to other cable types.

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    Communication channel

    A medium for transferring data between two locations in a network.

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    CPU function

    The CPU reads, interprets, and processes information and instructions in a computer.

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    Multitasking

    The technique where an operating system executes multiple programs by switching back and forth between them.

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    Multiplexer

    A combinational logic circuit that sends data from multiple sources through one line.

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    Mesons

    Nuclear particles believed to hold nucleons together in the nucleus.

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    Instruction Register

    A register that contains the instruction currently being executed.

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    Closed Circuit

    A circuit that allows current to flow because all components are connected.

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    Sectors

    Divisions of tracks on a hard disk for data storage.

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    Ohm's Law

    Doubling voltage across a resistor doubles the current, if resistance remains unchanged.

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    Identical Dimensions

    Physical quantities that share the same dimensional representation in physics.

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    1's Complement

    The binary representation obtained by flipping all bits of the original number.

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    ASCII

    A character encoding standard for electronic communication defining text in computers.

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    Data Packet

    A single unit of data transmitted over a network, known as a frame.

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    Sin θ + Cos θ Maximum

    The value of Sin θ + Cos θ is maximized at θ = 45 degrees.

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    CPU Cycle

    The time taken to fetch and execute a single machine instruction.

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    NAND Gate

    A logic gate that produces an output that is false only when all its inputs are true.

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    Non-Volatile Memory

    Memory that retains data even when the power is turned off.

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    CPU Components

    The two main components of the CPU are the Arithmetic Logic Unit (ALU) and Control Unit (CU).

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    Serial Adder

    An adder that adds bits of operands one after another.

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    Motherboard

    The main circuit board holding the CPU, RAM, and expansion cards.

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    Most Electronegative Element

    Fluorine is the most electronegative element on periodic table.

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    Non-emitting Radioactive

    Neutrons are not emitted by radioactive substances.

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    Most Abundant Noble Gas

    Argon (Ar) is the most abundant rare gas in the atmosphere.

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    Thermistor

    A resistive component designed to be sensitive to temperature changes.

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    Resistance Increase Effect

    When resistance increases in a circuit with constant voltage, current decreases.

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    High Frequency Attenuation

    Shunt capacitance is used for attenuation of high frequencies.

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    Study Notes

    Engineering Knowledge Test (EKT) - Computer Science

    • Instructions: The test has 50 questions, each worth 3 marks, and one mark is deducted for incorrect answers. No marks are deducted for unattempted questions.

    Question 1

    • Network Address Translation (NAT): A flavor of NAT is used to allow many users to connect to the global internet using a single IP address.

    Question 2

    • Structured Programming Languages: Pascal is more suited to structured programming than the other options.

    Question 3

    • Number Sequence: The next number in the series 1, 3, 11, 19, 37, ... is 55.

    Question 4

    • Access Control Lists (ACLs): Standard ACLs and Extended ACLs are the two main types.

    Question 5

    • Probability of Dice Roll: The probability that the minimum value is not less than 2 and the maximum value is not greater than 5 when an unbiased die is rolled four times is 65/81.

    Question 6

    • Stub Network: A stub network has only one entry point and no exit point.

    Question 7

    • Vector Projection: The projection of a vector on another vector is a scalar.

    Question 8

    • IPv6 Address Length: An IPv6 address is 128 bits long.

    Question 9

    • Probability of House Choice: The probability that all three persons choose the same house out of three available houses is 1/9.

    Question 10

    • Ones Complement: The 1's complement of 10 is 110.

    Question 11

    • ASCII Meaning: ASCII stands for American Standard Code for Information Interchange.

    Question 12

    • Single Packet: A single packet on a data link is called a frame.

    Question 13

    • Sine and Cosine: The value of sin θ + cos θ is greatest when θ = 45°.

    Question 14

    • Machine Instruction Time: The time required to fetch and execute one simple machine instruction is a CPU cycle.

    Question 15

    • Valid Host IDs: Valid host IDs for a router with IP address 172.16.2.1/23 include 172.16.1.100 and 172.16.1.198, but not 172.16.2.255 or 172.16.3.0.

    Question 16

    • Logic Function: Inverting the input of an AND gate results in a NAND gate.

    Question 17

    • Data Conversion Program: A program that converts data into a different code system is called an encoder.

    Question 18

    • Logical Database Structures: The chain structure is not considered a logical database structure.

    Question 19

    • Non-Volatile Memory: ROM (Read-Only Memory) and NVRAM (Non-Volatile RAM) are examples of computer memories that do not forget.

    Question 20

    • CPU Components: The control unit and the arithmetic logic unit (ALU) are the two main components of the CPU.

    Question 21

    • NOT Gate Output: The output of a NOT gate given an input of 10100 is 01011 (invert).

    Question 22

    • LAN Transmission Device: A router is a device that allows frames from one LAN to be transmitted to another.

    Question 23

    • TCP Services: SMTP, HTTP, and FTP services employ TCP.

    Question 24

    • Decimal to Binary: The binary equivalent of decimal 6110 is 110011102

    Question 25

    • Transmission Speeds: Fibre optic cable has the fastest transmission speeds, followed by coaxial cable, and then twisted pair wires.

    Question 26

    • Data Transfer Medium: A communication channel or bus is used for transferring data between two locations.

    Question 27

    • CPU Function: A CPU reads, interprets, and processes data and instructions.

    Question 28

    • Concurrent Program Execution: Multitasking enables a computer to execute multiple programs seemingly simultaneously by switching between them.

    Question 29

    • Computer Program Composition: A computer program is composed of discrete logical steps.

    Question 30

    • Data Transmission Device: A multiplexer allows data from multiple sources to be sent over a single transmission line.

    Question 31

    • Nuclear Particles: Mesons are assumed to hold nucleons together.

    Question 32

    • Refreshable Memory: Dynamic RAM (DRAM) requires refreshing many times per second.

    Question 33

    • Instruction Register: The instruction register holds the instruction to be executed.

    Question 34

    • Voltage and Current Relationship: A closed circuit allows voltage to influence current.

    Question 35

    • Hard Disk Sectors: A hard disk is divided into sectors.

    Question 36

    • Resistor Values: If doubling the voltage across a resistor doubles the current, it implies that the resistor value does not change.

    Question 37

    • Dimensionally Unequal Quantities: Pressure and modulus of elasticity have similar dimensions, while a Planck constant and angular momentum do not.

    Question 38

    • Distance between Persons: The maximum distance between two persons is 3 km, and the minimum distance is 0.2 km, if the speed of sound is 300 m/s.

    Question 39

    • Adder Types: Half-adders are the simplest type of adder.

    Question 40

    • Internal Computer Components: The motherboard holds the CPU, ROM, RAM, and expansion cards.

    Question 41

    • Electronegativity: Fluorine is the most electronegative element in the given options.

    Question 42

    • Radioactive Emissions: Radioactive substances emit electromagnetic radiations, electrons, alpha particles, and neutrons.

    Question 43

    • Abundant Rare Gas: Argon (Ar) is the most abundant rare gas in the atmosphere.

    Question 44

    • Temperature-Sensitive Component: A thermistor is a temperature-sensitive resistive component.

    Question 45

    • Frequency Attenuation: High frequencies are attenuated by inductance or shunt capacitance.

    Question 46

    • Steel Alloying Elements: Nickel is an alloying element of steel that does not sacrifice ductility as much as the others.

    Question 47

    • Resistance Change Effect: Increasing the resistance in a circuit with constant voltage will reduce the current.

    Question 48

    • Antenna Directivity: Increase in antenna size or number of feed horns will have an effect on antenna directivity.

    Question 49

    • Satellite Transponder: A transponder receives a signal, amplifies it, and retransmits it.

    Question 50

    • Friction Factor Dependence: The friction factor for fluid flow in pipes is independent of the mass flow rate.

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    AFCAT Engineering Knowledge Test (EKT) - Computer Science - PDF

    Description

    This quiz consists of 50 questions covering essential topics in computer science engineering, such as Network Address Translation (NAT), structured programming languages, and probability. Test your understanding of these concepts with challenging questions that require analytical thinking and technical knowledge.

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